Skocz do pozycji: 1.

Tytuł:

"Stick-slip" motion of open manipulators with flexible drives and dry friction in joints

Autorzy:

Harlecki, A.

Powiązania:

https://bibliotekanauki.pl/articles/279545.pdf

Data publikacji:

1999

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

dynamics
dry fiction
open manipulator

Opis:

An analysis of the phenomenon of "stick-slip" vibrations of arms of open manipulators with flexible drives and dry fiction in joints is carried out in the paper. A method of physical and mathematical modelling of such systems for the purposes of dynamic analysis is presented. An example of dynamic analysis of a manipulator with revolute and prysmatic joints has been carried out. Finally, some results of numerical simulation, illustrating the phenomenon of "stick-slip" motion, are presented.
Tematem artykułu jest analiza zjawiska drgań typu "stick-slip" ramion otwartych manipulatorów. Zaproponowano pewną metodę opracowania fizycznych i matematycznych modeli i manipulatorów w postaci otwartych łańcuchów kinematycznych dla potrzeb analizy dynamicznej, uwzględniającej podatność napędów i tarcie suche w parach kinematycznych. Przeprowadzono przykładową analizę dynamiczną wybranego manipulatora z postępową i obrotowymi parami kinematycznymi. W podsumowaniu zaprezentowano wybrane wyniki obliczeń numerycznych, ilustrujące wpływ suchego tarcia w parach kinematycznych na zjawisko drgań typu "stick-slip", a w konsekwencji stabilność ruchu członków manipulatora.

Źródło:

Journal of Theoretical and Applied Mechanics; 1999, 4; 873-892
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Rainfall Variability in the wet-dry seasons. An analysis in Batticaloa District, Sri Lanka

Autorzy:

Mathanraj, S.
Kaleel, M. I. M.

Powiązania:

https://bibliotekanauki.pl/articles/1118352.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Flood
Meteorology
Rainfall variability
Wet-dry

Opis:

Rainfall is of primary importance to both the physical and cultural landscape of any region. The objective of this study is to find the trends for rainfall variability on climate change in Batticaloa District of Sri Lanka, by analyzing 146 years of monthly data of rainfall received during the period 1869-2014 from the meteorological station of the Department of Meteorology. Some studies attribute extreme events to rainfall variability due to climate change induced by global warming. However, there is a dearth of climatological studies addressing the trends in rainfall over Sri Lanka in support of such attribution. In our study, statistical analysis such as linear and standard deviation for 3 year, 5 year, 11 year and 21 year periods were utilized to examine periodic rainfall changes in both annual and seasonal contexts. The study finds that the 3, 5 year moving average shows high drier seasons, but the 11, 21 years moving average show higher wet seasons during the period of study. The changes of rainfall are known to have led to disasters such as flood and drought. Annual rainfall varies from 864 mm to 3081 mm, the distribution of which has sight variation throughout the district.

Źródło:

World News of Natural Sciences; 2017, 9; 71-78
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Influence of charcoal calcination in field conditions on heavy metal content in plants and in the immediate vicinity of the retorts

Autorzy:

Orłowska, K.
Mierzwa-Hersztek, M.
Kopeć, M.

Powiązania:

https://bibliotekanauki.pl/articles/123693.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

charcoal
dry distillation
heavy metals
effect

Opis:

One of the ways of charcoal producing is its calcination in charcoal kilns called retorts in field conditions. In the charcoal production wood of deciduous trees is being subjected to the process of dry distillation. The process affects the surrounding environment. During the process a lot of pollutants are emitted to natural environment. One of them is ash, which contains heavy metals. The paper aimed at determining the effect of charcoal calcination on heavy metal content in the soil and plant material in the immediate vicinity. Charcoal calcination causes the alkalinization of the soil to 10 metres. In the closest vicinity, the calcination process increases Mn, Cd, Ni and Cu concentrations in the soil material. The influence of charcoal production on the concentrations Fe, Zn, Pb, Cr in soil material cannot be determined unanimously. The effect of the process on heavy metal content in plant material cannot be determined unanimously.

Źródło:

Journal of Ecological Engineering; 2014, 15, 1; 50-54
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Wiersze „suchego pogromu” – Marzec ’68 w poezji polskiej (rekonesans) [The poetry of the “dry pogrom” - March 1968 in Polish poetry (a reconnaissance)]

Autorzy:

Kuczyńska-Koschany, Katarzyna

Powiązania:

https://bibliotekanauki.pl/articles/643801.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Instytut Slawistyki PAN

Tematy:

pogrom
dry pogrom
Polish poetry
1968

Opis:

The poetry of the “dry pogrom” - March 1968 in Polish poetry (a reconnaissance)The paper construes the distinctive character of March 1968 against the classical definitions of pogroms; hence the selection of Adam Michnik’s phrase “dry pogrom.” It analyzes direct responses to the events, using examples of Aesopian language (Artur Międzyrzecki) and satire (Janusz Szpotański, Natan Tenenbaum), as well as other reactions (Jerzy Ficowski, Aleksander Rymkiewicz). Further, it is concerned with poems from artists affected – to a larger or smaller extent – by the dry pogrom, such as Arnold Słucki. Views from afar – including Kazimierz Wierzyński’s Izrael [Israel] and Jacek Bierezin’s Wygnańcy [Exiles] – have also been analyzed. Michał Głowiński’s formula of “March talk” has been used to interpret the poetics of the poetry about March 1968, with reference to Orwellian Newspeak and Klemperer’s LTI. Finally, in the conclusion, a question is posed of whether the poems of the dry pogrom are a “poetry of dry despair,” a term used by Julia Hartwig to describe Paul Celan’s poems, as they speak about impossible liquids – blood and tears. Wiersze „suchego pogromu” – Marzec ’68 w poezji polskiej (rekonesans)W tekście referuję odrębność pogromu marcowego wobec klasycznych definicji pogromu: dlatego wybieram formułę Adama Michnika „suchy pogrom”. Zajmuję się reakcjami bezpośrednimi; są to przykłady języka „ezopowego” (Artur Międzyrzecki), satyry (Janusz Szpotański, Natan Tenenbaum) i inne (Jerzy Ficowski, Aleksander Rymkiewicz). Interesują mnie także wiersze dotkniętych – w szerszym i węższym sensie – „suchym pogromem” (jak Arnold Słucki). Analizuję widzenie z oddali (np. Kazimierz Wierzyń- ski, Izrael; Jacek Bierezin, Wygnańcy). Wykorzystuję formułę „marcowego gadania” Michała Głowińskiego wobec poetyki wierszy o Marcu ’68 (tu odniesienia do Orwellowskiej nowomowy oraz Klempererowskiej LTI). W zakończeniu pytam, czy wiersze „suchego pogromu” to „poezja suchej rozpaczy” (formuła Julii Hartwig użyta wobec poezji Paula Celana) – o cieczach niemożliwych: krwi i łzach.

Źródło:

Studia Litteraria et Historica; 2017, 6
2299-7571

Pojawia się w:

Studia Litteraria et Historica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Experimental analysis of cutting forces in dry drilling of UNS A92024 alloy

Autorzy:

Domingo, R.
Álvarez, R.
Rubio, E. M.
Sebastián, M. A.

Powiązania:

https://bibliotekanauki.pl/articles/1429376.pdf

Data publikacji:

2008

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

dry drilling
aluminium alloys
cutting force

Opis:

Dry drilling is a process of interest in order to eliminate the lubrication fluids. Also the aeronautical industry has been expected to these advantages. This paper analyses the cutting forces obtained during the dry drilling of aluminium alloy plates, in particular UNS A92024-T3. Experiments were performed in CNC milling and several HSS Co drills were utilised with different diameters. Cutting forces were measured by means of a piezoelectric dynamometer Kistler. This analysis provides a statistical study, by means of multi-sample comparison, in particular, F-test in the analysis of variance. Results provide evidence that can provide information about hole drilling with a tool without wear, so forces are statistically similar.

Źródło:

Journal of Machine Engineering; 2008, 8, 2; 73-78
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Practical Approach to Optimal Cooling System Design for a Production Line Consisting of Plastic Injection Moulding Machines in Polish Specific Climat Conditions

Autorzy:

Bernacki, Maciej
Kaminski, Piotr

Powiązania:

https://bibliotekanauki.pl/articles/2064691.pdf

Data publikacji:

2020

Wydawca:

STE GROUP

Tematy:

cooling system
injection moulding
dry cooling

Opis:

The paper presents and describes cooling systems mainly used in industrial plants specialized in production based on injection moulding machines. Each solution is rated taking into account investment costs, technical complexity, exploitation costs and system flexibility in general. With regard to dynamically changing law regulations linked to refrigeration installations, mainly F-Gases Act, during optimal system selection new restrictions were respected. This approach ensures long-term exploitation without additional complications. The paper contains characteristics of cooled facility, i.e. production plastic plant using injection moulding machines, presents specifics for this type of application where two extremely different cooling processes are placed in parallel. One task is heat collection from injection moulds to ensure short production time and produced details recurrence, the second is keeping hydraulic oil temperature between temperature limits – this process ensures proper oil viscosity and prevents its premature wear.

Źródło:

Multidisciplinary Aspects of Production Engineering; 2020, 3, 1; 116--127
2545-2827

Pojawia się w:

Multidisciplinary Aspects of Production Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Radon in the dry carbon dioxide spa of Mátraderecske, Hungary

Autorzy:

Sóki, E.
Csige, I.

Powiązania:

https://bibliotekanauki.pl/articles/148459.pdf

Data publikacji:

2016

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

dry CO2 spa
mofette
radon
tracer

Opis:

The final product of a post-volcanic activity is the exhalation of low-temperature (<100°C) gases containing mostly carbon dioxide. The phenomenon is called mofettes, which are often used for therapeutic treatments in the form of dry CO2 spas. Along its pathway to the surface, the deep origin gas also intakes different radon isotopes from the rocks and soils; therefore, the risks associated with radon exposures should also be a concern. In this work, we have found that the 222Rn activity concentration in the mofette gas of Mátraderecske is particularly high; it is in the order of 200 kBq•m–3. However, owing to the carefully designed flow pattern of mofette gas and fresh air, the radon level is about 1 kBq∙m–3 at the breath level of the staff, accompanying the treatment, which is the radon reference level for workers in Hungary. We have also found that in this dry spa, radon is a good tracer of CO2; therefore, it can be used to monitor the CO2 distribution in the treatment pools.

Źródło:

Nukleonika; 2016, 61, 3; 245-249
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Studies on reconstitution of milk from milk powder depending on water temperature
Badanie stopnia odtworzenia mleka z rozpyłowego proszku mlecznego w zależności od temperatury wody

Autorzy:

Zbikowski, Z.
Zbikowska, A.
Ziajka, S.

Powiązania:

https://bibliotekanauki.pl/articles/1401966.pdf

Data publikacji:

1989

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

dry milk powder
dispersibility
solubility index
wettability

Opis:

Studies were carried out on the reconstitution of milk from milk powder depending on the temperature ofwater used (10-90°C, 10°C intervals). The temperature of wa ter affected the reconstitution process as well as the final appearance of the milk. It was also found that wettability and dispersibility of the milk powders depended on the technical parameters of the powder production process.
Przeprowadzono badania nad wpływem temperatury wody (w zakresie 10-90°C w przedziale co 10°C) na stopień odtwarzania mleka z rozpływ owego proszku mlecznego. Analizowane próbki charakteryzowały się zróżnicowaną zwilżalnością w zależności od rodzaju proszku oraz temperatury wody używanej do regeneracji. W większości analizowanych próbek wraz ze wzrostem temperatury następowało wyraźne skrócenie czasu zwilżania. Najlepszą zwilżalnością, niezależnie od temperatury wody, charakteryzował się granulowany odtłuszczony proszek mleczny. Nieco gorzej kształtowały się te wartości w aglomerowanym odtłuszczonym proszku mlecznym, choć tendencje tych zmian były dla obydwu produktów podobne. Znacznie natomiast gorszą zwilżalnością w porównaniu z poprzednio analizowanymi produktami charakteryzował się aglomerowany i nie aglomerowany pełny proszek mleczny. Poprawę zwilżalności tych produktów uzyskano dopiero przy użyciu wody o tem. 60-80°C (14-36 s). Przyczyn tak niskiej zwilżalności pełnego proszku mlecznego należy upatrywać w sposobie produkcji, zawartości wolnego tłuszczu, aglomeracji i w równomierności rozprowadzenia lecytyny. Nieco inaczej kształtowały się wyniki rozpraszalności proszku mlecznego, choć w większości próbek były one zgodne z wymogami. Najwyższą rozpraszalnością charakteryzowały się próbki proszku mlecznego regenerowane w wodzie o tern. 60°C. W niniejszych badaniach stwierdzono niewielki tylko wpływ temperatury wody używanej do regeneracji proszku na kształtowanie się wskaźnika rozpuszczalności. Zregenerowane mleko odtłuszczone, maślanka i serwatka, niezależnie od temperatury użytej wody charakteryzowały się bardzo dobrym wyglądem, uzyskując 12-13 punktów (na 15 możliwych). Natomiast wyraźnie gorszym wyglądem charakteryzowały się próbki mleka odtwarzanego z pełnego proszku mlecznego. Uzyskane wyniki wskazują na znaczny wpływ temperatury wody na przebieg procesu odtwarzania rozpyłowego proszku mlecznego. Wpływ ten uwidocznił się zarówno w samym przebiegu procesu regeneracji, jak i wyglądzie mleka odtworzonego.

Źródło:

Acta Alimentaria Polonica; 1989, 15(39), 3; 243-251
0137-1495

Pojawia się w:

Acta Alimentaria Polonica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:

Estimation of pasture herbage intake by beef cattle based on n-alkanes as markers
Ocena spożycia runi łąkowej przez bydło mięsne w oparciu o zawartość wskaźnikowych n-alkanów

Autorzy:

Nowakowski, Piotr
Czyz, Katarzyna
Iwaszkiewicz, Marta

Powiązania:

https://bibliotekanauki.pl/articles/1631358.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Botaniczne

Tematy:

cattle
grass intake
dry matter
n-alkanes

Opis:

The aim of the study was to evaluate herbage dry matter intake in 16 beef cows which grazed continuously on permanent pastures within the “The Warta Estuary” National Park (Poland), using the minimally invasive method based on n-alkanes as markers (C29, C31, C33). Significant differences were observed in the nutritive value of herbage collected for analyses by cutting or nipping. The calculated content of energy and protein in the nipped herbage was higher: UFL by 58.1% and PDI by 50%, with a higher digestibility of nutrients. The values obtained for DM intake in pasture herbage by cows were closest to the standards when calculations were based on the C29/C32 pair of n-alkanes. However, the best prediction of DM intake estimation from creeping bentgrass (Agrostis stolonifera) pasture, in agreement with the accepted energy and protein standards, was based on the proportions between alkanes C31/C32.
Celem badań była ocena spożycia suchej masy roślinnej na przykładzie 16 krów mięsnych, które w sposób ciągły wypasane były na pastwiskach w Parku Narodowym „Ujście Warty” (Polska), z zastosowaniem minimalnie inwazyjnej metody wykorzystującej jako wskaźniki n-alkany (C29, C31, C33). Istotne różnice zaobserwowano w przypadku wartości odżywczej roślinności pozyskanej do analizy przez koszenie lub uszczykiwanie. Obliczona zawartość energii i białka była wyższa w przypadku roślin uszczykiwanych: UFL o 58.1%, a PDI o 50%, czemu towarzyszyła wyższa strawność składników odżywczych. Wartości dotyczące pobrania suchej masy wraz z roślinnością przez zwierzęta były najbliższe norm, gdy obliczenia oparto na stosunku n-alkanów C29/C32. Najdokładniejsze oszacowanie pobrania suchej masy z mietlicy rozłogowej (Agrostis stolonifera) z pastwiska, zgodne z przyjętymi normami dotyczącymi energii i białka, uzyskano w oparciu o stosunek alkanów C31/C32.

Źródło:

Acta Agrobotanica; 2017, 70, 1
0065-0951
2300-357X

Pojawia się w:

Acta Agrobotanica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:

Development of a testing station for empirical verification of the algebraic model of dry ice piston extrusion

Autorzy:

Górecki, Jan

Powiązania:

https://bibliotekanauki.pl/articles/2037802.pdf

Data publikacji:

2021

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

dry ice
carbon dioxide
agglomeration
extrusion
compaction

Opis:

Efficient use of resources is a very important consideration for every production process, especially where waste materials are used as raw materials. One example of these kinds of processes is dry ice extrusion. Based on the subject literature, it can be observed that the machines available in the market that are used to compress dry ice are characterized by high working force value. This leads to low efficiency of resource consumption, in regards to both electrical energy and carbon dioxide. This paper presents a proposed design of a test stand used for measuring compression force as a function of piston displacement in the course of the dry ice extrusion. The first part of the article presents the testing methodology and test stand design. The second part presents the results of measurement of compression force as a function of piston displacement with three different die types. The results of the study allowed to establish the difference between the values of the measured limit force and the values calculated with an analytical model. The test stand design and the results presented in this paper are important for further research and development works in the area of efficient extrusion and compaction of dry ice.

Źródło:

Acta Mechanica et Automatica; 2021, 15, 3; 107--112
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:

Sjögrens syndrome - diagnosis and contemporary therapeutic possibilities

Autorzy:

Cwalina, Oliwia
Pandey, Ada
Prokop, Dominika
Czarnacka, Kinga
Gawlak, Małgorzata
Kuźlik, Bartosz
Guzek, Katarzyna
Alsoubie, Ismael
Chmura-Hołyst, Alicja
Roszkowska, Anna
Pawlicka, Ilona
Piskorz, Agnieszka
Kozak, Maciej

Powiązania:

https://bibliotekanauki.pl/articles/22792621.pdf

Data publikacji:

2023-06-30

Wydawca:

Medical Education

Tematy:

Sjögren's syndrome
dry eye syndrome
therapeutic options

Opis:

Dry eye syndrome is a group of medical conditions that can be caused by many factors, as a result of which there is an abnormality in moisturizing of the eye surface by a tear film. One of the causes of this disorder is Sjögren’s syndrome, which is an autoimmune disease in which the body produces antibodies against its own proteins. The glands of external secretion, mainly lacrimal and salivary glands are damaged as a result of inflammation. Associated with this side effects, affect negatively and reduce the quality of life, which is why in the following article we present the available therapeutic options for patients suffering from ophthalmological manifestations of Sjögren’s syndrome.

Źródło:

OphthaTherapy; 2023, 10, 2; 110-115
2353-7175
2543-9987

Pojawia się w:

OphthaTherapy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Review on recent development in environmental-friendly EDM techniques
Rozwój zaawansowanych i ekologicznych metod cięcia elektroerozyjnego EDM

Autorzy:

Singh, N. K.
Singh, K. K.

Powiązania:

https://bibliotekanauki.pl/articles/175819.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

electro-discharge machining
EDM
Dry-EDM
Near-dry EDM
proces cięcia elektroerozyjnego
proces suchy EDM
proces półsuchy EDM

Opis:

The electrical discharge machining (EDM) is unitary of the widely used unconventional machining because of its ability to cut very hard material engendering high dimensional accuracy as well. In thermo-electric process, control sparks generation between electrodes causes material removal; however, application of hydrocarbon oil based dielectric is an issuance of environmental disruption. To rectify this problem, replacement of dielectric is main concerns in EDM research. This paper highlights Dry-EDM, Near-Dry EDM and EDM in water, which is conceived as an environment amiable alteration in the oil EDM process. The work gives a thorough review of Dry, near-dry EDM and EDM in water as a process, where the target is to endeavor dielectric fluids that can be substituted bypassing hydrocarbon oil. It is perceived that water and gas based dielectrics could take over oil-based fluids in die sink applications. Novel technological advances in dry EDM machining processes, which deliberate the relatively advanced stage of a technology in to the area of academic and industrial research is briefly reviewed. An outline of the prospective trend of reviewing is intimate in the last fragment.
Proces cięcia elektroerozyjnego (EDM) jest stosowany w obróbce materiałów o dużej twardości. Umożliwia przecinanie elementów o złożonym kształcie. Materiał w procesie EDM jest usuwany w wyniku jego erozji spowodowanej wyładowaniami elektrycznymi pomiędzy elektrodą roboczą i przedmiotem obrabianym zanurzonym w ciekłym dielektryku – oleju węglowodorowym. Czynnik izolujący jest częstą przyczyną nagłego przerywania procesu cięcia. Stąd konieczność prowadzenia badań dla opracowanych dielektryków umożliwiających prowadzenie procesu w sposób ciągły. W pracy przedstawiono ogólną charakterystykę procesu EDM poddanego modyfikacji. Olej węglowodorowy zastąpiono lub całkowicie usunięto z procesu cięcia. Scharakteryzowano proces cięcia elektroerozyjnego na sucho (Dry-EDM), proces zbliżony do suchego (Near-Dry EDM) i proces cięcia w wodzie. Przewiduje się, że zastąpienie oleju wodą lub gazami cechującymi się dobrymi właściwościami dielektrycznymi umożliwi uzyskanie parametrów procesu cięcia zapewniających bezawaryjną i ciągłą pracę urządzenia EDM. Przedstawiono zaawansowaną metodę cięcia elektroerozyjnego, bez konieczności stosowania czynnika ciekłego. Jest to metoda przyjazna dla środowiska, obecnie opracowywana w wielu instytutach badawczych dla zastosowania w praktyce przemysłowej.

Źródło:

Advances in Manufacturing Science and Technology; 2015, 39, 1; 17-37
0137-4478

Pojawia się w:

Advances in Manufacturing Science and Technology

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:

Dysbiosis of the ocular surface - a new risk factor for ophthalmic diseases? The role of eyelid hygiene

Autorzy:

Skrzypecki, Janusz

Powiązania:

https://bibliotekanauki.pl/articles/22792595.pdf

Data publikacji:

2023-06-30

Wydawca:

Medical Education

Tematy:

eyelid hygiene
allergic conjunctivitis
blepharitis
dry eye

Opis:

Quantitative and qualitative disturbances in the composition of the ocular surface microbiome can be a significant risk factor for the development of various ophthalmic disorders, including eyelid inflammation, dry eye syndrome, and allergic conjunctivitis. In this publication, we present a review of the data regarding the association between dysbiosis and these mentioned clinical conditions. Additionally, we provide recommendations for the treatment of dysbiosis, including eyelid hygiene.

Źródło:

OphthaTherapy; 2023, 10, 2; 97-102
2353-7175
2543-9987

Pojawia się w:

OphthaTherapy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

On the turbulent boundary layer of a dry granular avalanche down an incline. I. Thermodynamic analysis

Autorzy:

Fang, C.

Powiązania:

https://bibliotekanauki.pl/articles/280588.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

closure model
dry granular avalanche
thermodynamics
turbulence

Opis:

Characteristics of the turbulent boundary and passive layers of an isothermal dry granular avalanche with incompressible grains are studied by the proposed zero-order turbulence closure model. The first and second laws of thermodynamics are applied to derive the equilibrium closure relations satisfying turbulence realizability conditions, with the dynamic responses postulated within a quasi-static theory. The established closure model is applied to analyses of a gravity-driven stationary avalanche down an incline to illustrate the distributions of the mean solid content, mean velocity, turbulent kinetic energy and dissipation across the flow layer, and to show the influence of turbulent fluctuation on the mean flow features compared with laminar flow solutions. In this paper, detailed thermodynamic analysis and equilibrium closure relations are summarized, with the dynamic responses, the complete closure model and numerical simulations reported in the second part.

Źródło:

Journal of Theoretical and Applied Mechanics; 2016, 54, 3; 1051-1062
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Beneficiation and concentration of feldspar from syenite ore in Medina, Saudi Arabia for industrial utilization

Autorzy:

Gougazeh, Mousa

Powiązania:

https://bibliotekanauki.pl/articles/2175450.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

syenite
dry magnetic separation
floatation
grade
recovery

Opis:

The objective of this study was to reduce the contents of iron and titanium heavy minerals of feldspar from Medina syenite ore by a combination of magnetic separation and flotation to obtain the commercial scale of feldspar concentrate for glass and ceramics industries. For the first time, a process flowchart was provided in the light of this study to produce a high-quality K-feldspar product from syenite ore, which meets the requirements of feldspar for glass and ceramics productions. The results reflect that the best performance separation of iron and titanium contents was produced by a dry magnetic separator at 16.000 gauss. The produced feldspar concentrate by magnetic separation yielding 0.54% Fe2O3 with 87% Fe2O3 recovery and 0.57% TiO2 with 16% recovery. The flotation tests were performed on the non-magnetic fraction of the syenite ore. In this stage, the most effective for removal of Fe2O3 and TiO2 from syenite ore was obtained at a 300 g/ton dosage of a mixture of Aeromine 3030C and Aeromine 801 + Aeromine 825 as a collector in an acidic medium (pH 3). The final feldspar concentrate with 0.07% Fe2O3 and 0.06%TiO2 grades was obtained with 89% Fe2O3 recovery and 86% TiO2 recovery. The commercial scale of feldspar concentrate from syenite ore can meet the desired specification of grades 1 and 2 for glass, porcelain, and ceramics industries.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 155056
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Dry Sliding Wear Behavior of Boron-Doped AISI 1020 Steels

Autorzy:

Aktas, B.
Balak, V.
Carboga, C.

Powiązania:

https://bibliotekanauki.pl/articles/1031623.pdf

Data publikacji:

2017-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

dry sliding wear
AISI 1020 steel
boron
friction

Opis:

In the present study, the wear properties of AISI 1020 steels produced by a casting process with different boron contents were investigated, using a pin-on-disc tribometer under dry sliding conditions. The friction coefficients of undoped AISI 1020 steel, 0.002 and 0.01 wt% boron-doped samples were 0.33, 0.27, and 0.32, respectively. The addition of boron into AISI 1020 steel led to a decrease in the friction coefficient, due to the lubricating effect of boron; X-ray diffraction showed that both Fe₂B and FeB phases are present in the boron-doped samples, both of which cause this lubrication. The wear test results also showed that the wear rate of the 0.002 wt% boron-doped AISI 1020 sample decreased compared to the undoped AISI steel, and then increased in the 0.01 wt% boron sample. Therefore, the wear resistance of AISI 1020 steel is increased with the addition of small amounts of boron. Scanning electron microscopy results indicated that the characteristic wear mechanism for the boron-doped sample surfaces was plastic deformation and mild abrasive wear; for undoped AISI 1020 steel, cracking and spalling were observed instead.

Źródło:

Acta Physica Polonica A; 2017, 132, 3; 455-457
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Altitudinal distribution of Aedes indices during dry season in the dengue endemic area of Central Java, Indonesia

Autorzy:

Sayono, Sayono
Nurullita, Ulfa
Sumanto, Didik
Handoyo, Wahyu

Powiązania:

https://bibliotekanauki.pl/articles/972287.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Parazytologiczne

Tematy:

dengue vector
dry season
altitudinal distribution
Aedes aegypti

Opis:

Aedes mosquitoes, mainly Aedes aegypti and Aedes albopictus, are the primary and secondary vectors of dengue viruses in Indonesia, with transmission occurring by sucking blood. The density of the vectors is influenced by season and rainfall, but limited by altitude. The aim of the study is to describe the density and distribution of dengue vectors during the dry season based on the altitudes of recent dengue cases in five regencies of Central Java Province, Indonesia. Mosquito larvae and pupae were collected from the indoor and outdoor water containers from 253 houses within 50 m of houses occupied by a dengue patient. A considerable dengue vector population was found in all localities and altitudes based on the Aedes indices: an HI of 41.7% (15.0–70.6), CI of 33.6% (8.1–69.6) and BI of 57.1 (15.0–94.1). The highest indices were found in the highest altitude settlement; as the most common larval habitat in this village was a large-sized cement tank, larvivorous fish can act as effective predators in this case. This finding indicates an expansion of the dengue problem from low to high altitudes, causing a high potential for dengue transmission in all of the localities.

Źródło:

Annals of Parasitology; 2017, 63, 3; 213-221
0043-5163

Pojawia się w:

Annals of Parasitology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 18.

Tytuł:

Preliminary investigations on silicone resin composites with carbon filler for dry electrodes application

Autorzy:

Grochala, Dominik
Kajor, Marcin
Smoleń, Paweł
Stodolak-Zych, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/286052.pdf

Data publikacji:

2019

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

dry electrodes
ECG pads
silicone resin
carbon filler

Opis:

The paper presents results of investigations of basic material properties of novel composites based on silicone resin and carbon nanotubes as a filler. The motivation for the research is a need for materials which provide better mechanical properties than standard wet Ag/AgCl electrodes. However, a critical issue is also obtaining defined electrical characteristics in order to preserve an ability to effectively record biomedical signals such as electrocardiography (ECG). Within the introduction chapter, related researches and the current state-of-the-art in the context of dry electrodes technology were described. In the next step technological aspects of components processing and forming as well as the morphology of substrates used in the research were presented. Thermally-cured silicone resin was utilized to obtain elastic properties of the resulting material. The carbon nanotubes (CNT) were chosen as a conductive medium which provides defined electrical impedance. A developed technological process allowed to deliver samples of reproducible structure and properties. In the next chapter, methods and results of conducted experiments involving electrical, mechanical and thermal examination were presented. Finally, achieved outcomes are promising in the context of improvements of the designed composite. Especially the conductivity below 100 Ohms constitutes a significant motivation for further research in the field of dry electrodes for biosignals acquisition.

Źródło:

Engineering of Biomaterials; 2019, 22, 149; 20-24
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 19.

Tytuł:

Optimum separation route for semi bituminous coal using semi-pilot scale pneumatic stratification jig

Autorzy:

Boylu, F.
Cetinel, T.
Guven, O.
Karakas, F.
Cinku, K.
Karaagaclioglu, I. E.
Celik, M. S.

Powiązania:

https://bibliotekanauki.pl/articles/109366.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

semibituminous coal
dry coal cleaning
Allair jig
optimization

Opis:

Nowadays, dry beneficiation technologies with an air dense medium fluidized bed come into prominence in the field of coal preparation. In this study, the optimum conditions for different operational parameters such as discharge stargate rate, pulsation frequency, and superficial air velocity were investigated on separation of semi bituminous coal from Soma (Imbat) region using a semi pilot scale Allair jig unit. The experimental studies were carried out with two coal size fractions of -15+4 and -4+1 mm by applying rougher and scavenging stages. After the optimization of each parameter, the results for the rougher stages indicated that clean coal products could be obtained with 11.80% and 16.74% ash contents for -15+4 mm and -4+1 mm size ranges, respectively. In addition, discardable tailings with 65.44% and 60.95 % ash contents could be obtained as the result for the scavenging stages. Finally, the combination of these results for -15+1 mm size exhibited that 59.80% of the feed material with 37.70% ash content can be upgraded to clean coal products with low ash content as 19.80% while the remaining part was discarded as tailings with 68.60% ash content. These values suggested that optimizing the operational parameters of unit brings better results which are applicable in industrial application of dry processes compared to wet processes.

Źródło:

Physicochemical Problems of Mineral Processing; 2015, 51, 2; 559-573
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 20.

Tytuł:

Impact of ultrasounds on physicochemical characteristics of potato tubers
Wpływ ultradźwięków na fizykochemiczne właściwości bulw ziemniaka

Autorzy:

Sawicka, B.
Pszczółkowski, P.
Danilčenko, H.
Jariene, E.

Powiązania:

https://bibliotekanauki.pl/articles/13099236.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie

Tematy:

tuber
acidity
dry matter
starch
texture
ultrasound
potato

Źródło:

Agronomy Science; 2020, 75, 1; 85-104
2544-4476
2544-798X

Pojawia się w:

Agronomy Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

The effect of liquid grinding aids on the dry fine grinding of muscovite

Autorzy:

Cayirli, Serkan
Gokcen, Hasan Serkan
Bozkurt, Volkan
Ucbas, Yasar

Powiązania:

https://bibliotekanauki.pl/articles/24085945.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

grinding aid
dry grinding
stirred ball mill
muscovite

Opis:

This paper investigates the production of a micronized muscovite to a target product size of d50~15 μm with a minimum energy consumption to suit the product requirements of the paint industry by a dry grinding process in a laboratory-scale vertical stirred ball mill. A series of batch dry grinding tests were conducted without and with two commonly used industrial liquid grinding aids, ethylene glycol (EG, C2H6O2) and triethanolamine (TEA, C6H15NO3). The results were evaluated based on particle size distribution (PSD), specific energy consumption, span value, and aspect ratio. The results showed that using liquid grinding aids resulted in a finer PSD, lower specific energy consumption, a narrower size distribution, lower span values, and a higher aspect ratio, which meant better delamination and improved grinding efficiency to that of no grinding aid. The interaction between grinding aids and ground muscovite surfaces was investigated by Fourier Transform Infrared Spectroscopy (FTIR). FTIR measurements revealed that EG and TEA were physically adsorbed on muscovite surfaces. Scanning Electron Microscopy (SEM) was also employed to determine differences between ground muscovite surfaces with and without grinding aids. SEM images indicated that grinding aids could prevent the agglomeration of ground muscovite particles while improving delamination. Adding grinding aids led to a decrease in muscovite agglomeration and an improvement in lamination owing to the adsorption of grinding aids on the particle surfaces.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 2; art. no. 165854
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Contact lenses and dry eye syndrome: can they be reconciled?

Autorzy:

Waszczykowska, Arleta

Powiązania:

https://bibliotekanauki.pl/articles/51789558.pdf

Data publikacji:

2024-03-31

Wydawca:

Medical Education

Tematy:

dry eye disease
contact lenses
contact lens discomfort

Opis:

The function of the tear film is to moisturize, lubricate, nourish, and protect the delicate surfaces of the cornea and conjunctival epithelium covering the eyeball and eyelids. A healthy tear film is crucial for shaping and maintaining a smooth refractive surface of the cornea, ensuring proper optical function of the eye by eliminating small irregularities in the epithelium. Contact lens wearers often experience various discomforts related to wearing lenses, known as contact lens discomfort (CLD), which can lead to discontinuation of lens wear. CLD is frequently associated with dry eye disease, caused by tear film disorders resulting from incorrect composition, reduced production, or excessive evaporation of tears from the ocular surface. Contact lens wear can diminish corneal sensitivity and lead to a reflex blockade of sensation, causing a deficiency in the aqueous layer of the tear film. Additionally, wearing contact lenses may increase tear evaporation due to reduced blinking frequency and incomplete eyelid closure during blinking. This paper discusses therapeutic approaches and modifications in lens fitting aimed at maintaining a healthy ocular surface and improving comfort for contact lens wearers.

Źródło:

OphthaTherapy; 2024, 11, 1; 25-29
2353-7175
2543-9987

Pojawia się w:

OphthaTherapy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

The comparison of the label content in selected dry foods for dogs and cats in 2011 and 2013
Porównanie treści etykiet wybranych karm pełnoporcjowych dla psów i kotów w 2011 i 2013 roku

Autorzy:

Holda, K.
Berwid-Wojtowicz, S.
Glogowski, R.

Powiązania:

https://bibliotekanauki.pl/articles/805959.pdf

Data publikacji:

2014

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

comparison
label content
feed label
dry food
dry feed
healthy animal
dog
cat
animal feeding
energy content
commercial product

Opis:

The objective of this study was to compare the content of selected complete dry feed labels for adult, healthy dogs and cats, emphasizing the accordance with the relevant EU requirements which have recently came into force. Additionally, simple calculations of the energy content were made to enhance the characteristics of the products available to the customer. The level of accordance reached in average 87% and 82% in dog and cat food respectively. It should be stated that the improvement of the labels content, as compared with 2011, was not significant. The key elements of the label information were either not improved or decreased (the statement of the necessity of constant access to water or daily dosage per animal). All evaluated products were typical maintenance foods, but their energy density was quite differentiated which may have some deleterious nutritional consequences associated with their long time supply.
Celem prezentowanych badań była ocena treści wybranych etykiet pełnoporcjowych suchych karm dla dorosłych, zdrowych psów i kotów, z podkreśleniem zgodności z aktualnymi wymaganiami unijnymi. Średni poziom zgodności wyniósł 87 i 82%, odpowiednio dla psów i kotów. Warto podkreślić, że między 2011 a 2013 rokiem nie nastąpiła istotna poprawa treści etykiet karm. Kluczowe elementy informacyjne etykiet nie zostały poprawione, a nawet uległy pogorszeniu (np. zdanie o konieczności zapewnienia wody pitnej czy informacja o zalecanej dziennej dawce na zwierzę). Wszystkie oceniane produkty należały do grupy typowych karm bytowych, jednak ich gęstość energetyczna była dość zróżnicowana, co w perspektywie ich długookresowego podawania może mieć niekorzystne konsekwencje żywieniowe.

Źródło:

Zeszyty Problemowe Postępów Nauk Rolniczych; 2014, 576
0084-5477

Pojawia się w:

Zeszyty Problemowe Postępów Nauk Rolniczych

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Dinamika častic ognetušaŝego poroška na puti k očagu požara pri impulʹsnom sposobe podači ego v zonu goreniâ
The Dynamics of Dry Chemical Powder Particles Towards the Fire Source During Their Pulse Feeding into the Combustion Zone
Dynamika cząsteczek proszku gaśniczego podczas podawania go w kierunku pożaru metodą impulsową

Autorzy:

Kitsak, A. I.

Powiązania:

https://bibliotekanauki.pl/articles/372752.pdf

Data publikacji:

2018

Wydawca:

Centrum Naukowo-Badawcze Ochrony Przeciwpożarowej im. Józefa Tuliszkowskiego

Tematy:

dry chemical extinguishing system
dry chemical powder
velocity of the dry chemical powder
power of fire source
heat wave
modułowa proszkowa instalacja gaśnicza
proszek gaśniczy
prędkość proszka gaśniczego
moc źródła pożaru
fala ciepła

Opis:

ABSTRACT Objective: Currently, the pulse-type dry chemical extinguishing system (DCES) is extensively used for extinguishing fires. These units generally consist of a control junction and powder extinguishing modules (PEM) filled with fire extinguishing powder and gas pumped into the module under the high pressure. Giving extinguishing powder from the PEM in the fire source is carried out when exposed to the heated air of the thermal column generating lift. The magnitude of this force depends on the power of fire and intensity of air change in the room. The efficiency of fire extinguishing with the DCES in these conditions will be determined not only by the powder extinguishing ability but also its dynamic characteristics when approaching the fire. In the design of pulse-type fire extinguishing systems using PEMs it should be considered that during testing PEMs the dynamics of the gas powder mixture released from the module is impacted by the air resistance and the lift of the heated gases from the thermal column from the fire source. Aim: The aim of this work is to determine the ratio of the unit weight of dry chemical extinguishing powder depending on the distance from the nozzle of the DCES for the defined pneumatic and loading characteristics of the system, disperse parameters of dry chemical powder and the fire power. Project and methods: To reach the aim of the study, a mathematical model approach was applied for the flow process the extinguishing substance from the DCES and its movement in open-air space towards the fire. Results: A mathematical model was developed to calculate the movement dynamics of the gas-powder mixture in an open-air space towards the fire source under specific performance parameters of the DCES and the power of the fire. A correlation for estimating the extinguishing powder particle velocity at different distances from the DCES nozzle during their movement towards the fire of a given power was obtained. An experimental study of the dynamics of the front of the powder mixture ejected from the pulse-type PEM was performed. The analysis of the results showed their satisfactory level of compliance with numerical calculations. Conclusions: The obtained results can be used for analyses of pulse-type PEMs with a goal of assessing the spatial and energy parameters of fires which can be extinguished using this method. The results can be used during the design of such installations in order to specify the pneumatic and load parameters of the module associated with the given technical characteristics of the extinguishing agent, the assumed power level of the fire source and the height of the PEM.
Wprowadzenie: W obecnych czasach modułowe proszkowe instalacje gaśnicze typu impulsowego są powszechnie wykorzystywane do gaszenia pożarów. Instalacje te składają się zazwyczaj z modułów sterowania oraz modułów gaszenia proszkowego, które wypełnione są proszkiem gaśniczym i gazem pod wysokim ciśnieniem. Na proszek gaśniczy podawany z modułów gaszenia proszkowego do ogniska pożaru oddziałuje nagrzane powietrze komina termicznego, generujące siłę nośną. Wielkość tej siły zależy od mocy pożaru i intensywności wentylacji pomieszczenia. W takich warunkach efektywność gaszenia pożaru za pomocą instalacji proszkowej będzie zależna nie tylko od skuteczności gaśniczej proszku, lecz także od jego charakterystyk dynamicznych, podczas gdy przemieszcza się w stronę źródła pożaru. Przy projektowaniu modułowych proszkowych instalacji gaśniczych typu impulsowego, a także podczas badań modułów gaszenia proszkowego należy uwzględniać, że na dynamikę ruchu mieszaniny gazowo-proszkowej wyzwalanej z modułu wpływają oporność powietrza oraz siła nośna rozgrzanych gazów komina termicznego ze źródła pożaru. Cel: Celem pracy jest wyznaczenie zależności między prędkością jednostkowej masy proszku gaśniczego a lokalizacją otworu wylotowego modułu gaszenia proszkowego typu impulsowego w warunkach określonych charakterystyk pneumatycznych i obciążeniowych modułu, parametrów dyspersji proszku i mocy pożaru. Projekt i metody: Aby zrealizować wyznaczony cel, zastosowano metodę modelowania matematycznego ubytku środka gaśniczego po jego wyzwoleniu oraz jego ruchu w kierunku źródła pożaru w przestrzeni otwartej. Wyniki: Opracowano model matematyczny dynamiki ruchu mieszaniny gazowo-proszkowej, odbywającego się na przestrzeni otwartej w kierunku źródła pożaru oraz w określonych warunkach parametrów pracy modułów gaszenia proszkowego oraz energii pożaru. Otrzymano zależność do oceny prędkości cząsteczek proszku gaśniczego w różnych odległościach od otworu wylotowego modułu gaszenia proszkowego, podawanego w stronę pożaru o określonej mocy. Przeprowadzono badania eksperymentalne dynamiki przemieszczania się frontu gazowo-proszkowej mieszaniny wyrzucanej przez moduły gaszenia proszkowego typu impulsowego. Analiza otrzymanych wyników świadczy o zadowalającej zgodności z obliczeniami numerycznymi. Wnioski: Otrzymane wyniki mogą być wykorzystane przy przeprowadzaniu badań modułów gaszenia proszkowego typu impulsowego mających na celu ocenę parametrów przestrzennych i energetycznych pożarów, które mogą być nimi ugaszone. Rezultaty można wykorzystać również podczas projektowania tego rodzaju instalacji w celu określenia parametrów pneumatycznych i obciążeniowych modułu związanych ze znanymi technicznymi charakterystykami środka gaśniczego, zakładanych wartości mocy źródła pożaru i wysokości umieszczenia modułu gaszenia proszkowego.

Źródło:

Bezpieczeństwo i Technika Pożarnicza; 2018, 49, 1; 76-85
1895-8443

Pojawia się w:

Bezpieczeństwo i Technika Pożarnicza

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

A novel dry granule preparation technology and comparison of granule properties with conventional wet system for ceramic tiles production

Autorzy:

Ergin, Hasan
Taşkıran, Mehmet Uğur
Pilevne, Ahmet Atınç
Turgut, Hatice
Kayacı, Kağan

Powiązania:

https://bibliotekanauki.pl/articles/24148612.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

ceramic tile
dry granulation
energy consumption
granule characteristics

Opis:

The ceramic tile manufacturing process uses a lot of energy, mainly thermal energy, and to a lesser extent electric energy. Total energy costs account for between 50% and 55% of average direct manufacturing costs. Fossil fuel combustion, such as natural gas combustion, produces carbon dioxide emissions. Therefore, energy consumption and emissions issues are vitally important for both environmental effects and process costs in ceramic tile manufacturing. The wet process of granule production systems including wet grinding and spray drying is widely used for the production of granules. Although there is high energy consumption for the water evaporation in the spray dryer, it ensures to produce high quality tile for many years. In this study, important granule properties were introduced for a novel dry granule production system. In the successful application of a dry granulation system, the conformity of produced granules is vitally important such as particle size distribution, bulk density, flow properties, and moisture of granules and conformity for the pressing process. This paper includes the comparative studies for properties of granules produced in spray dryer and new dry granule preparation systems and the full results of the industrial trials with these granules. The cost comparison of both granule production systems was also made for the same raw material usage. The natural gas consumption and water consumption were reduced respectively from 46 to 15 m3/ton and from 540 to 95 liters/ton in the new dry granulation system while electricity consumption and maintenance costs remain almost the same in both systems.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 167498
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Dry eye syndrome in the postoperative period after laser vision correction
Zespół suchego oka w okresie pooperacyjnym po zabiegach laserowej korekcji wzroku

Autorzy:

Tomczak, Małgorzata
Chomicka, Anna
Dmitriew, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/1927995.pdf

Data publikacji:

2021

Wydawca:

Medical Education

Tematy:

dry eye syndrome
laser vision correction
postoperative period

Opis:

The paper presents the results of research on the occurrence, severity and persistence of the dry eye syndrome in patients after laser vision correction. The patients were treated with preservative-free lubricating eye drops, with a specific percentage of sodium hyaluronate. The research was carried out on a group of 70 patients who underwent laser vision correction.
W pracy przedstawiono wyniki badań dotyczących wystąpienia, nasilenia i długości trwania zespołu suchego oka po wykonaniu laserowej korekcji wzroku i zastosowaniu kropli nawilżających bez konserwantów o określonym stężeniu procentowym hialuronianu sodu. Badania przeprowadzono na grupie 70 osób, u których wykonano zabieg laserowej korekcji wzroku.

Źródło:

OphthaTherapy; 2021, 8, 1; 66-70
2353-7175
2543-9987

Pojawia się w:

OphthaTherapy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

The impact of dry mass content in pig liquid manure on its treatment with a filtration method

Autorzy:

Kowalski, Z.
Makara, A.
Marszałek, M.
Hoffmann, J.
Hoffmann, K

Powiązania:

https://bibliotekanauki.pl/articles/778774.pdf

Data publikacji:

2014

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

pig manure treatment
filtration method
dry mass
filtrate

Opis:

The present study examines the impacts of dry mass content in pig liquid manure on its treatment with a filtration method. Samples of liquid manure with variable dry mass content were subjected to treatment using phosphoric acid, sulfuric acid, lime milk and superphosphate, as well as to thermal treatment, while in the last phase of pressure filtration. Increased dilution of the manure resulted in a reduced raw materials consumption ratio and improved filtration process efficiency, which ranged from 408 to 3765 kg/m2/h. The highest filtration efficiency was achieved using manure containing 3% dry mass, while the lowest efficiency was observed in manure at 10% dry mass. The increase in liquid manure dilution also reduced chemical oxygen demand in the filtrate, which ranged from 15 062 to 3656 mg/l. An appropriate manure dilution level, under the constant parameters of the treatment process, reduced phosphorus content in the filtrate to < 10 mg/kg Chile simultaneously enriching the post-filtration sediment with this precious fertilizing component.

Źródło:

Polish Journal of Chemical Technology; 2014, 16, 3; 106-110
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Influence of particle size and feed rate on coal cleaning in a dry separator

Autorzy:

Kademli, M.
Gulsoy, O. Y.

Powiązania:

https://bibliotekanauki.pl/articles/110339.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

dry coal cleaning
particle size effect
air separator

Opis:

This research is concerned with the effects of particle size distribution and feed rate of feed on the coal cleaning performance of table type air separator. In tests, the lignite and hard coal samples from Mugla and Zonguldak districts in Turkey were used. The samples were tested in three different size distributions such as –38 + 6 mm, –19 + 6 mm and –9.5 + 6 mm. The effect of particle size was investigated together with the feed rate 2 Mg/(hm2), 1.68 Mg/(hm2) and 1.32 Mg/(hm2) and very important physical parameters of table type air separator such as, riffle height, table slope and table frequency. Results were analyzed by using the Tromp curve for indicating the effects in detail. Consequently, the results revealed that the particle size had remarkable effect on separation efficiency. The separation efficiency was, however, inversely affected as the particle size distribution became finer, and the best results were obtained in particle size distribution was –38 + 25 mm in both sample tested. The Ep value was 0.11 for the hard coal samples while it was 0.13 for the lignite samples.

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 1; 204-213
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Weed Infestation and Yielding of Potato Under Conditions of Varied Use of Herbicides and Bio-Stimulants

Autorzy:

Gugała, M.
Zarzecka, K.
Dołęga, H.
Sikorska, A.

Powiązania:

https://bibliotekanauki.pl/articles/125246.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

air-dry weed mass
herbicides
biostimulants
total yield

Opis:

The aim of the study was to determine the effect of applied herbicides and growth regulators on the airborne limitation of dry weed mass and the total yield of three edible potato varieties. The field experiment was established as two-factor in a (split-plot) system in three replications. The experiment examined: I factor – three moderately early varieties of edible potato: Bartek, Gawin, Honorata. II factor – five ways of using herbicides and bio-stimulants: 1. control object: mechanical care 2. Harrier 295 ZC herbicide at a dose of 2.0 dm³·ha^-1, 3. Harrier 295 ZC herbicide at a dose of 2.0 dm³·ha^-1 and then after the plant rises the Kelpak SL bioregulator twice at a dose of 2.0 dm³·ha^-1, 4. Sencor 70 WG herbicide at a dose of 1.0 kg·ha^-1, 5. Sencor 70 WG herbicide and then after the plant rises the Asahi SL bio-stimulant twice at a dose of 1.0 dm³·ha^-1. The obtained test results showed that the smallest dry weed mass determined in both research dates was obtained using Harrier 295 ZC herbicide and Kelpak SL growth bio-stimulant (0.7 g·m^-2 and 3.1 g·m^-2), while the largest in the control object (15.1 and 64.7 g·m^-2), respectively. The total yield of potato tubers depended on both the types of herbicides and bio-stimulants used and the varieties cultivated in the experiment. However, the weather conditions which varied in particular years significantly influenced both the size of the air-dried mass of weeds and the total yield of potato tubers.

Źródło:

Journal of Ecological Engineering; 2018, 19, 4; 191-196
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Survey on some important functional foods from the Chinese and Eastern perspective

Autorzy:

Shahrajabian, Mohamad Hesam
Sun, Wenli
Cheng, Qi

Powiązania:

https://bibliotekanauki.pl/articles/2148105.pdf

Data publikacji:

2020-12-30

Wydawca:

Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy

Tematy:

Functional Food
Jujube
Lotus
Coix
Dry Lily
Tremella

Opis:

The functional food industry has been developing rap-idly in recent years. The most important pharmacological prop-erties of jujube are anti-diabetic effects, hypnotic-sedative and anxiolytic effect, neuroprotective activity, sweetness inhibitor, anti-cancer activity, antimicrobial activity, anti-ulcer activity, an-ti-inflammatory and anti-spastic effect, anti-allergic activity, per-meability enhancement activity, cognitive activities, anti-fertility property, hypotensive and anti-nephritic effect, cardiovascular ac-tivity, immunostimulant effects, anti-oxidant effects, and wound healing activity. N. nucifera has various notable pharmacological activities such as anti-ischemic, antioxidant, anti-cancer, antivi-ral, antiobesity, lipolytic, hypocholestermic, antipyretic, hepato-protective, hypoglycaemic, antidiarrhoeal, antifungal, antibacte-rial, anti-inflammatory and diuretic activities. Coix is a source of ornamental beads, a stable sustenance, and a productive fodder grass increasingly viewed as a potential energy source. The heal-ing properties of lily include moisturizing the lungs, relieving cough from lung-dryness, clears heart-fire and tranquilizes the mind. Dried lily bulbs are commonly used in herbal formulas for promoting lung health, treating yin-deficiency of the heart which manifests as irritability, insomnia, dreaminess, palpitation and absent-mindedness, and promotes vital fluid and improves skin complexion. The most important tremella mushroom benefits are anti-aging, anti-inflammatory, lower cholesterol, combat obesity, protect nerves and may fight cancer. Functional foods are making inroads into Chinese diets with their promises to improve health and nutrition. Chinese consumers should choose nutritional and healthy food to maintain general health and reduce the risk of health problems.

Źródło:

Polish Journal of Agronomy; 2020, 43; 47-56
2081-2787

Pojawia się w:

Polish Journal of Agronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Comparative pathogenesity of Fusarium species on some of the potato cultivars.

Autorzy:

Esfahani, Mehdi Nasr

Powiązania:

https://bibliotekanauki.pl/articles/2199608.pdf

Data publikacji:

2011-12-20

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

Fusarium dry rot
Fusarium spp.
pathogenesity
potato
varieties

Opis:

The fusarium dry rot is one of the most important diseases of potato tubers causing considerable damages during the storage. Resistance sources are one of the fundamental methods in prevention and disease control. This study details the pathogenesity and assessment of susceptibility of commercially acceptable potato Cultivars to dry rot causing by Fusarium sulphureum , F. solani and F. oxysporum under similar conditions includings . inoculum , mehtod of inoculation, temperature , relative humidity and light. The results indicated that though the similar conditions were applied, the tubers of varieties reacted with differing levels of resistance to the species causing the disease. It was found that F. sulphureum was the most aggressive one, then fallowed by F. solani as far as the disease development is concerned and were independent. F. oxysporum did not cause considerable damages. In these expriments the commerical potato varieties were Seuminar, Rustica, clivastave, Dital, Escort, Monalisa, Marfona, Mondial, Aniona, Deraga, Asta, Hidram, Melisa, Moren, Mariyana, Pashandi, Frasco, Alva, Ceaser, Asva, Aula, Sandara , Marijke, Folva, Tiva, Fregate, Baraka, Aida, Diamant, Arnica, Panda, Atlas, Erigo, Volkano, Famosa, Carlita, Korrigan, Casmos, Assour, Cosima, Ariane, Desiree and saturna, in which started with most susceptible ones fallowed to resistance ones at end to F.sulphureum. The variety saturna were the most resistant one to the all tested species in these expriments.

Źródło:

Plant Breeding and Seed Science; 2011, 64; 45-54
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Determination of the best model to predict milk dry matter in high milk yielding dairy cattle
Określenie najlepszego modelu do przewidywania suchej masy mleka u wysokowydajnego bydła mlecznego

Autorzy:

Kurnaz, B.
Önder, H.
Piwczyński, D.
Kolenda, M.
Sitkowska, B.

Powiązania:

https://bibliotekanauki.pl/articles/3133494.pdf

Data publikacji:

2021

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

dairy cattle
high milk yielding dairy cattle
milk
milk component
dry matter
dry matter content
prediction
model
regression
estimation
curve estimation

Źródło:

Acta Scientiarum Polonorum. Zootechnica; 2021, 20, 3; 41-44
1644-0714

Pojawia się w:

Acta Scientiarum Polonorum. Zootechnica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Ocena przydatności kilku odmian fasoli do uprawy ekologicznej
Evaluation of some dry bean cultivars suitability for organic cultivation

Autorzy:

Szafirowska, A.
Kołosowski, S.

Powiązania:

https://bibliotekanauki.pl/articles/335010.pdf

Data publikacji:

2011

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych

Tematy:

fasola
odmiana
uprawa ekologiczna
dry bean
cultivars
organic cultivation

Opis:

W latach 2008-2009 w Instytucie Warzywnictwa w Skierniewicach prowadzono badania nad oceną kilku odmian fasoli na suche nasiona pod kątem ich przydatności do upraw ekologicznych. Badano odmiany o nasionach białych (Katarzynka i Igołomska), czerwonych (Augusta, Rawela, Wawelska) i czarnych ( Nigeria). Oceniano cechy morfologiczne (krzewienie roślin), występowanie chorób i szkodników oraz wielkość i jakość plonu nasion. Szczególną uwagę zwrócono na występowanie uszkodzeń spowodowanych żerowaniem larw śmietek kiełkówki Delia florilega Zett oraz śmietki glebowej Delia platura Mig. podczas wschodów polowych roślin. Opóźnienie siewu do 20 maja pomagało rozwiązać problem zniszczenia siewek. Odmiany o kolorowych nasionach były mniej uszkodzone przez larwy śmietek niż odmiany o białych nasionach. Stwierdzono zróżnicowanie odmian pod względem badanych cech. Najmniej rozkrzewioną i najbardziej podatną na bakteriozy była odmiana Katarzynka, która także najwcześniej dojrzewała. Najsilniejszym wzrostem roślin i najpóźniejszym dojrzewaniem nasion charakteryzowała się Nigeria. Najwięcej strąków wytwarzała Igołomska, która obok Nigerii była najpóźniej porażona przez bakteriozy. Najwyższym plonowaniem odznaczały się Igołomska i Augusta. Odmiany o nasionach czerwonych lepiej były przystosowane do warunków siedliskowych niż odmiany o nasionach białych.
During 2008-2009 in Research Institute of Vegetable Crops in Skierniewice the trials were conducted to assess several dry bean cultivars for organic production. Following Polish bred cultivars were examined: Katarzynka and Igołomska (both of white seeds), Augusta, Rawela, Wawelska (red seeds) and Nigeria (black seeds). Morphological characters, disease and insects occurrence as well as the yield quantity and quality were examined. A special attention was paid to bean seed maggots occurrence such as Delia florilega Zett and Delia platura Mig during field emergence of the plants. Delay of sowing date up to May 20th solve the problem of seedling damage by insects larvae. Some evidence for better resistance of coloured seed cultivars to insect damage was noticed. The cultivars differed in all evaluated factors. Katarzynka produced the lowest number of pods, the earliest developed the seeds, but also it was the most susceptible to bacterial infection. Igołomska created the most branchy plants with the largest number of pods. Nigeria presented the strongest growth and latest seed maturation. Both last mentioned cv. Igołomska and Nigeria distinguished themselves as better tolerant to bacterial infection than others. The highest yield was obtained from Igołomska and Augusta. In general red seed cultivars seemed to be better habitat adapted then white ones.

Źródło:

Journal of Research and Applications in Agricultural Engineering; 2011, 56, 4; 134-137
1642-686X
2719-423X

Pojawia się w:

Journal of Research and Applications in Agricultural Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Model and analysis of the process of unit-load stream sorting by a manipulator with torsional disks
Model i analiza procesu sterowania strumienia ładunków jednostkowych manipulatorem z krążkami skrętnymi

Autorzy:

Piątkowski, T.

Powiązania:

https://bibliotekanauki.pl/articles/279326.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

unit load
dry friction
handling process
belt conveyor
sorting

Opis:

In the paper, the author presents a proposal for the modelling of the process of sorting of a stream of unit loads realised by means of a ma- nipulator with torsional disks. In the developed model, one takes into account three zones of friction influencing motion of the load in the manipulator working space: the first one associated with interactions on the manipulator active carrying surface, and two zones located on the belt conveyor right in front of, and behind the manipulator. Frictional pro- perties of the object are represented by a nonlinear friction coefficient defined based on a cubic b-spline curve. On the basis of numerical experiments performed on the sorting model, one determined the influence of fundamental structural and operational parameters of the manipulator on precision and reliability of the process of unit-load stream sorting. The obtained data can be used as guidelines for designing new solutions of sorting manipulators and may provide hints necessary for optimization of already-existing devices.
W artykule przedstawiono propozycję modelowania przebiegu procesu sortowania strumienia ładunków jednostkowych realizowanego za pomocą manipulatora z krążkami skrętnymi. W opracowanym modelu uwzględniono, iż na ruch ładunku w przestrzeni pracy manipulatora mają wpływ trzy strefy tarcia: pierwsza strefa obejmująca oddziaływanie aktywnej powierzchni nośnej manipulatora oraz dwie strefy znajdujące się na przenośniku taśmowym tuż przed i za manipulatorem. Właściwości cierne obiektu reprezentowane są nieliniowym współczynnikiem tarcia wykorzystując krzywą cubic b-spline. Na podstawie przeprowadzonych eksperymentów numerycznych modelu sortowania określono wpływ podstawowych parametrów konstrukcyjnych i eksploatacyjnych manipulatora na precyzję i niezawodność przebiegu procesu sortowania potoku ładunków jednostkowych. Uzyskane dane mogą być wykorzystane jako wytyczne podczas projektowania nowych rozwiązańmanipulatorów sortujących oraz jako wskazania niezbędne do optymalnej eksploatacji urządzeń już istniejących.

Źródło:

Journal of Theoretical and Applied Mechanics; 2009, 47, 4; 871-896
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Measurements of dynamic friction characteristics of the belt-pulley contact under dry conditions

Autorzy:

Kubas, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/262917.pdf

Data publikacji:

2019

Wydawca:

Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji

Tematy:

belt-and-pulley transmission
dry friction
dynamic friction characteristics

Opis:

The paper presents the results of measurements of friction forces achieved by forcing slip between a poly-V 5pk belt and the pulley needed to formulate empirical models of dynamic friction. This kind of belt and pulley can be found in automotive industry to drive the alternator and coolant pump in cars. The forces were measured for several cases of assumed preload and two cases of wrap angle. The complicated stick and slip processes are simplified by assuming an average effective dynamic friction coefficient. The results show that the values of friction cannot be described by classic Euler formula. They not only depend on the velocity, but also noticed that can depend on sign of acceleration. Also, some results of the approximation are presented. It is proposed that the assumed norm will be minimised using the Nelder-Mead optimisation method. The measurements and the approximation let assume specified dynamic friction characteristics. The achieved results are applied to the model of a belt transmission. In the paper presented results of simulations of the model of belt transmission.

Źródło:

Archiwum Motoryzacji; 2019, 84, 2; 71-90
1234-754X
2084-476X

Pojawia się w:

Archiwum Motoryzacji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Design of Inner Gate for CRIST Shipyard Dry Dock

Autorzy:

Bogdaniuk, M.
Górecki, Z.

Powiązania:

https://bibliotekanauki.pl/articles/258988.pdf

Data publikacji:

2012

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

shipyard
dry dock
dock inner gate
FEM strength analysis

Opis:

The paper deals with a removable steel inner gate which was designed to separate two parts of a dry dock of about 70 m in width and 380 m in length. The gate allows for independent assembly of ship structures in the two separated parts of the dock. The fore part of the dock can be flooded while the after part is dry. The gate was designed by IDEK Company Ltd in 2011 and it was soon constructed and used by CRIST Shipyard in Gdynia.

Źródło:

Polish Maritime Research; 2012, 1; 52-56
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Mineral beneficiation of nepheline syenite with combination of dry magnetic separation and flotation methods

Autorzy:

Çınar, Mustafa
Durgut, Emrah

Powiązania:

https://bibliotekanauki.pl/articles/110583.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

mineral beneficiation
nepheline syenite
dry magnetic separation
flotation
ceramics

Opis:

Nepheline syenite is an important raw material for ceramic body composition as a melting agent. However, impurities such as iron, titanium, mica, and calcite minerals in nepheline syenite can lead to quality problems on the surface of floor tile because of different sintering properties. Therefore, these impurities should be eliminated from syenite before sintering process to increase its quality while reducing economic and environmental impacts. In this study, it was aimed to reduce impurities of nepheline syenite using dry magnetic separation and flotation methods. The dry magnetic separation results showed that the amount of TiO₂+Fe₂O₃ in the sample decreased from 2.50% to 0.06%. In additio to this, optimum flotation conditions were determined while separating calcite, mica, and further iron bearing minerals from the nepheline syenite by using sequential flotation method. The optimum flotation conditions for calcite flotation were determined as natural pH: 7.9 and 500 g/Mg DER NA7 collector dosage; for mica removal pH: 3.1 and 500 g/Mg Custamine 9024 or A4 collector dosage. After overall mineral beneficiation experiments, albite+microcline mineral content increased from 78% to 97%. In conclusion, a clean concentrate for ceramic body and frit composition quality was gained from nepheline syenite containing high amount of Fe₂O₃ and TiO₂ with dry magnetic separation and flotation experiments.

Źródło:

Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1227-1238
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Interactive influence of maturity, storage temperature and duration on quality of maize hybrid seeds

Autorzy:

Ajayi, S. Adesola
Rühl, Gerhard
Greef, Jörg M.

Powiązania:

https://bibliotekanauki.pl/articles/2199077.pdf

Data publikacji:

2006-12-22

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

genotype
seed dry weight
seed quality
seed testing
storage

Opis:

Seeds of two single-cross maize hybrids, Ulla and Benicia, harvested at eight stages during seed development and maturation were stored at –20°C and under ambient room temperature. Changes in quality were monitored with standard germination, accelerated ageing and two types of cold tests at three months intervals. The aim of this study was to investigate whether relative differences in quality of the seeds prior to storage were maintained during medium-term storage. Interactions between maturity stage and storage temperature were practically negligible...

Źródło:

Plant Breeding and Seed Science; 2006, 54; 29-38
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Yield-Forming Effects of Herbicide and Biostimulants Application in Potato Cultivation

Autorzy:

Zarzecka, Krystyna
Gugała, Marek
Mystkowska, Iwona
Sikorska, Anna

Powiązania:

https://bibliotekanauki.pl/articles/2068460.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

Solanum tuberosum L.
dry matter
starch
protein
growth regulators

Opis:

A field experiment was carried out in 2018-2020 in central-eastern Poland. The aim of the study was to determine the effect of different methods of applying herbicide and herbicide with biostimulants on the yields of dry matter, starch and protein. The experiment was established using the split-plot method, in which the first factor were two potato varieties (Oberon and Malaga), and the second factor involved five methods of applying herbicide and herbicide with biostimulants (1. control object, 2. clomazone herbicide + metribuzin, 3. clomazone herbicide + metribuzin + PlonoStart biostimulant, 4. clomazone herbicide + metribuzin + Aminoplant biostimulant, 5. clomazone herbicide + metribuzin + Agro-Sorb-Folium biostimulant). Potato varieties and methods of herbicide and biostimulant application significantly influenced the yield of dry matter, starch and protein. The highest yields of the above-mentioned tuber components were obtained from objects 5 and 3 sprayed with herbicide with the Agro-Sorb-Folium and PlonoStart biostimulants. The weather conditions prevailing in the years of the research were also decisive for the yield of protein collected from the area unit.

Źródło:

Journal of Ecological Engineering; 2022, 23, 3; 137--144
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Dry and steam reforming of methane. Comparison and analysis of recently investigated catalytic materials. A short review.

Autorzy:

Summa, Paulina
Samojeden, Bogdan
Motak, Monika

Powiązania:

https://bibliotekanauki.pl/articles/779028.pdf

Data publikacji:

2019

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

dry methane reforming
steam methane
reforming
nickel catalyst
hydrotalcite

Opis:

In order to produce valuable syngas, industrial processes of dry reforming of methane and steam reforming of methane must be further developed. This paper is focused on reviewing recently examined catalysts, supporting the mentioned technologies. In both processes the most popular active material choice is usually nickel, due to its good availability. On the other hand, noble metals, such as ruthenium, rhodium or platinum, provide better performance, however the solution is not cost-effective. Materials used as a support influence the catalytic activity. Oxides with basic properties, such as MgO, Al₂ O₃ , CeO₂ , are frequently used as carriers. One of the most promising materials for reforming of methane technologies are hydrotalcites, due to adjustable composition, acid-base properties and possibility of incorporation of various metals and complexes.

Źródło:

Polish Journal of Chemical Technology; 2019, 21, 2; 31-37
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Impact of magnetized water on germination energy of seeds and weight of garden savory (Satureja hortensis L.), buckwheat (Fagopyrum esculentum L.), yellow lupine (Lupinus luteus L.) and winter rape (Brassica napus L.) seedlings

Autorzy:

Podsiadło, C.
Skorupa, B.

Powiązania:

https://bibliotekanauki.pl/articles/101201.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN

Tematy:

magnetized water
seed germination
fresh weight
dry weight
seedlings

Opis:

The laboratory experiment was carried out in 2008-2009. It consisted of several series of measurements, which were designed to evaluate the effect of magnetized water on seeding value and growth of seedlings and the weight of selected plant species. The results confirmed a diverse reaction of assessed species seeds towards the type of water used. Mag¬netized water stimulated the seed germination of garden savory and rape, while had no effect on the seeds of yellow lupine. In case of the seeds of buckwheat, this parameter decreased under the influence of magnetized water in the first six days of the experiment. A beneficial effect of bio-stim¬ulation with magnetized water on the rate of growth of the aboveground parts of seedlings was recorded. The positive effect related to all species. The greatest stimulation was observed in buckwheat and garden savory. The use of magnetized water reduced the growth rate of roots at garden savory and buckwheat, while it increased the growth of winter rape roots. It had no effect in yellow lupine. The type of water exerted a significant influence on the fresh weight and roots of seedlings. Regardless of the assessed species, the use of magnetized water resulted in a significant increase in fresh weight and roots by 6% and 9%. No significant influence of the water type on dry matter of seedlings of analysed plant was assessed.

Źródło:

Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/2; 1241-1250
1732-5587

Pojawia się w:

Infrastruktura i Ekologia Terenów Wiejskich

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Influence of drip irrigation on nutritive value of winter squash „Rouge vif d’Etampes” after harvest and storage

Autorzy:

Wichrowska, D.
Rolbiecki, R.
Rolbiecki, S.
Figas, A.
Jagosz, B.
Ptach, W.

Powiązania:

https://bibliotekanauki.pl/articles/101416.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN

Tematy:

carotenoids
chemical composition
dry matter
pumpkin
sugar
vitamin C

Opis:

The aim of the study was to determine the influence of drip irrigation on the nutritive value of winter squash ‘Rouge vif d’Etampes’ fruits analyzed directly after the harvest and after the storage. The plants were grown on the very light soil in the region of decreased rainfall amounts during the vegetation period. The field experiment was conducted in 2007-2008 at Kruszyn Krajeński near Bydgoszcz on the soil of quality class V-VI (very weak and weak-rye-soil-complex). The field water capacity in the soil layer 0-50 cm was 57.5 mm, while the effective useful retention amounted 29.3 mm. The experiment was designed as one-factorial trial in four replications; drip irrigation as the experiment factor was applied. As the control the plots without irrigation were considered. The single plot area was 11.2 m2. The drip irrigation was conducted according to the soil tensiometer indications (-0.04 MPa). The research material was the eatable parts of fresh fruits that were analyzed directly after the harvest and after the storage for six months at the temperature 10°C and the relative air humidity 75%. The drip irrigation performed during the cultivation of winter squash increased the content of vitamin C, total carotenoids including ß-carotene, as well sugars in the fruits, both after the harvest and after the storage. After six months of the storage the rise of the content of dry matter, total carotenoids including ß-carotene, as well monosaccharides was noted, while the level of vitamin C, total sugar, and saccharose have been reduced.

Źródło:

Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/2; 1167-1175
1732-5587

Pojawia się w:

Infrastruktura i Ekologia Terenów Wiejskich

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Effect of increasing doses of mushroom substrate on the root mass of selected lawn mixtures

Autorzy:

Wiśniewska-Kadżajan, B

Powiązania:

https://bibliotekanauki.pl/articles/124328.pdf

Data publikacji:

2013

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

lawn
dry matter of roots
mixtures
mushroom’s refuse

Opis:

To fertilize both grassland and turf lawns waste materials, including the substrate after mushroom cultivation have been used recently. The aim of this study was to determine the effect of the mushrooms substrate to change the amount of root mass of five turf lawns with varying precipitation of perennial ryegrass. Field experiment was established in 2004 in the agricultural station of University of Natural Science and Humanities in Siedlce. In the research, the following factors were used: 1) dose of mushroom substrate, 2) the mixtures lawns with different species composition and participation of perennial ryegrass. Within two years of research the evaluation of the amount of root mass of turf lawns were done. This assessment was made after plants’ vegetation in 2005 and 2006. The roots sampling of lawns were taken. After cleaning of the root and drying at 1050C, the mass was determined by weighing. The largest mass of roots (average from the study years and substrate doses) was observed for the two-component mixture (M1) with 80% share of perennial ryegrass, and the smallest for five-component mixture (M5), where the share of perennial ryegrass was 40%. The average for research years of and mixtures type, indicates that most of the root mass formed the turf lawns with the largest mushroom substrate doses, but at least on the control object. The majority of the tested lawn mixtures, with the exception of mixture five (M5) produced a greater mass of roots in the second year (2006) than in the first (2005) year, despite worse weather conditions.

Źródło:

Journal of Ecological Engineering; 2013, 14, 4; 39-44
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Comparison of Service Characteristics of Two Town’s WWTP

Autorzy:

Jurik, L.
Kaletova, T.
Sedmakova, M.
Balazova, P.
Cervenanska, A.

Powiązania:

https://bibliotekanauki.pl/articles/125312.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

wastewater
wastewater treatment plant
pollutants
inflow
dry weather flow

Opis:

The study presents variation of wastewater inflow and its components during a year. We considered a situation with and without precipitation. Two renovated wastewater treatment plants were selected to analyse the available parameters and relation between them. Both wastewater treatment plants served to treat domestic and industrial wastewater with similar characteristics. One of them is only for the town purposes; second one serves for the surrounding villages. The relation between the concentration of pollutants and a flow of wastewater is very low. The correlation and a coefficient of the determination between pollutants were over 0.5.

Źródło:

Journal of Ecological Engineering; 2017, 18, 3; 61-67
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

The impact of inflammatory flares in dry eye disease

Autorzy:

Izdebska, Justyna
Samelska, Katarzyna

Powiązania:

https://bibliotekanauki.pl/articles/23202875.pdf

Data publikacji:

2023-09-30

Wydawca:

Medical Education

Tematy:

flare
immunological response
inflammatory state
exacerbations
dry eye disease

Opis:

Dry eye disease is a condition treated commonly by most of the ophthalmologists. The current understanding of the disease puts impact on its newly discovered components – ‘flares’. Flares are defined as exacerbations of dry eye disease. They take place in response to the triggers, which may be environmental or internal factors. During the ‘flare’ the immunological response is being activated and the patients experience the worsening of the symptoms. The introduction of the anti-inflammatory treatment (e.g. topical hydrocortisone solution) is the effective treatment in the cases of inflammatory state exacerbations.

Źródło:

OphthaTherapy; 2023, 10, 3; 179-182
2353-7175
2543-9987

Pojawia się w:

OphthaTherapy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Numerical modelling and analysis of cooling system of electrical transformer dipped into polymerised resin

Autorzy:

Smołka, J.
Nowak, A. J.
Wrobel, L. C.

Powiązania:

https://bibliotekanauki.pl/articles/1955729.pdf

Data publikacji:

2003

Wydawca:

Politechnika Gdańska

Tematy:

dry electrical transformer
heat transfer
natural convection
coupled analysis

Opis:

This paper discusses a numerical model of the heat dissipation processes in an electrical transformer dipped into polymerised resin. The transformer is cooled by both natural convection (via the ambient air) and forced convection (via the water cooling system attached to one of the transformer casing walls). Two cases have been compared, i.e. the cooler connected to the bottom or the top wall of the transformer container, respectively. In order to improve the modelling of the natural convection problem, an independent geometrical model of the surrounding air was created and considered separately. The continuity of temperature and heat flux along the interface between the transformer and air was enforced by an iterative procedure. This procedure allowed one to calculate and then prescribe local heat fluxes to the external walls of the transformer. The numerical results obtained in this project have yielded information on the efficiency of the analysed cooling system.

Źródło:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 3; 439-448
1428-6394

Pojawia się w:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Function of Agricultural Terraces in Mediterranean Conditions - Selected Examples From the Island of Ikaria (The Southern Sporades, Greece)

Autorzy:

Tsermegas, Irena
Dłużewski, Maciej
Biejat, Katarzyna
Szynkiewicz, Adam

Powiązania:

https://bibliotekanauki.pl/articles/2035474.pdf

Data publikacji:

2011-06-01

Wydawca:

Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych

Tematy:

Agricultural terraces
erosion
Ikaria
dry stone wall
georadar profiles

Opis:

The aim of the research was to define the influence of agricultural terraces on slope erosion. There have been selected three plots located on the Greek island Ikaria. On the plots detailed geomorphological mapping was done, spatial relief models were created based on the measurements taken using GPS RTK, georadar profiles were made using RAMAC/GPR and the extent of destruction of terrace resistance walls was evaluated.In comparison with similar forms on other Aegean islands, Ikarian terraces are narrow and high. Their stability depends on: lihtology, slope gradient, height and spatial arrangement of particular terrace steps and the current way of their usage. It was acknowledged that the most stable are the forms created on crystalline schists and gneisses, whereas the slopes, which erode the easiest, are the terraced ones consisting of carbonate rocks.The obtained results indicate that on Ikaria similarly to numerous other regions the most significant factor facilitating erosion on the terraced slopes is the cessation of their agricultural usage.

Źródło:

Miscellanea Geographica. Regional Studies on Development; 2011, 15; 65-78
0867-6046
2084-6118

Pojawia się w:

Miscellanea Geographica. Regional Studies on Development

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Examination of the Electric Field Intensity Distribution Between Wet Surfaces During Cable Aging Process

Autorzy:

Gunes, I.

Powiązania:

https://bibliotekanauki.pl/articles/1032064.pdf

Data publikacji:

2017-03

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

Cable insulation
electric field
dry band arcing
aging test

Opis:

In this study, electric field effect was investigated by dry band arcing test method. ADSS (all-dielectric self-supporting) cables are usually placed on power grids. These cables are affected by temperature and are exposed to many environmental effects such as wind and UV rays. In this study, the effect of water flow over ADSS cable on electric surface erosion on dry surfaces was investigated by electric arcing method, according to IEEE 1222 standard and the electric field intensity at the surface and the electric potential distribution were analyzed using the finite element method.

Źródło:

Acta Physica Polonica A; 2017, 131, 3; 548-550
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Quantification of Sclerocarya birrea (Marula) fruits as feed supplement for ruminants in dry sub-humid zone of Nigeria

Autorzy:

Muhammad, N.
Omogbai, I. J.
Maigandi, S. A.
Abubakar, I. A.
Shamaki, S. B.

Powiązania:

https://bibliotekanauki.pl/articles/1192686.pdf

Data publikacji:

2016

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Marula fruits
Nigeria
Quantification
ruminant dry sub-humid
supplement

Opis:

A study was conducted in four selected local government areas of Sokoto state in the extreme North-western part of Nigeria to quantify Sclerocarya birrea fruits as feed supplement for ruminant animals. The areas were Kware, Wamakko, Bodinga and Rabah. A check list was used to obtain information from ten respondents from five districts in each local government area making a total of 200 respondents. Information collected includes tree availability, yield and uses. Data generated from the study were subjected to simple descriptive statistics and analysis of variance. Results obtained indicated that 48 % of the respondents reported the availability of S. birrea while 20 % indicated its scarcity. 43 % of the respondents reported the use of S. birrea as food and medicine for animal and man and 10 % reported its use as fuel and wood work. Kware local government had a significantly higher number of S. birrea trees compared to other locations (P<0.05). However, the yield obtainable was significantly higher in Bodinga and Rabah local government areas (P<0.05) compared to Kware and Wamakko. Results indicated that a total of 13,953; 10,377; 11,069 and 9,641 kg of S. birrea could be obtained from Kware, Bodinga, Rabah and Wammako Local Government areas annually. It was concluded that S. birrea is a potential feed supplement in the dry sub-humid zone of Nigeria.

Źródło:

World Scientific News; 2016, 46; 88-99
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Analiza procesu zużywania pary kinematycznej brąz-żeliwo stopowe
Analysis of the process of wear of a bronze-alloy cast iron kinematic pair

Autorzy:

Czarnecki, H.

Powiązania:

https://bibliotekanauki.pl/articles/191036.pdf

Data publikacji:

2010

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

tarcie suche
brąz-żeliwo
dry friction
bronze-cast iron

Opis:

W opracowaniu przedstawiono wyniki badań zużycia pary kinematycznej brąz–żeliwo stopowe. Taka para ma zastosowanie w mechanizmach posuwowych (ślimak–zębatka ślimakowa) obrabiarek ciężkich. Eksperyment prowadzono dla tarcia suchego przy zmiennych twardościach żeliwa, naciskach jednostkowych i szybkości procesu tarcia. Określono zużycie obu elementów pary. Wyniki przedstawiono na wykresach i w postaci zależności na intensywność zużywania.
The paper presents the results of tests on the wear of a bronze–alloy cast iron kinematic pair. Such a kinematic pair is applied in the feed mechanisms (worm – worm rack) of heavy machine tools. The experiment was conducted for dry friction with variable cast iron hardness values, unit pressures, and friction process rates. The wear of each element of the pair was determined. The results are presented in diagrams and in the form of wear intensity relationships. It has been found that the increase in alloy cast-iron hardness reduces the magnitude of wear of both pair elements. Moreover, the wear intensity relationship indicates that the process rate influences the wear magnitude more strongly than the unit pressure does, which is advantageous for this system, since increased loads in this mechanism are accompanied by lower loads.

Źródło:

Tribologia; 2010, 4; 57-65
0208-7774

Pojawia się w:

Tribologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

Microwave plasma for hydrogen production from liquids

Autorzy:

Czylkowski, D.
Hrycak, B.
Miotk, R.
Jasiński, M.
Mizeraczyk, J.
Dors, M.

Powiązania:

https://bibliotekanauki.pl/articles/148564.pdf

Data publikacji:

2016

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

dry reforming
ethanol
hydrogen production
isopropanol
kerosene
microwave plasma

Opis:

The hydrogen production by conversion of liquid compounds containing hydrogen was investigated experimentally. The waveguide-supplied metal cylinder-based microwave plasma source (MPS) operated at frequency of 915 MHz at atmospheric pressure was used. The decomposition of ethanol, isopropanol and kerosene was performed employing plasma dry reforming process. The liquid was introduced into the plasma in the form of vapour. The amount of vapour ranged from 0.4 to 2.4 kg/h. Carbon dioxide with the fl ow rate ranged from 1200 to 2700 NL/h was used as a working gas. The absorbed microwave power was up to 6 kW. The effect of absorbed microwave power, liquid composition, liquid fl ow rate and working gas fl ow rate was analysed. All these parameters have a clear infl uence on the hydrogen production effi ciency, which was described with such parameters as the hydrogen production rate [NL(H2)/h] and the energy yield of hydrogen production [NL(H2)/kWh]. The best achieved experimental results showed that the hydrogen production rate was up to 1116 NL(H2)/h and the energy yield was 223 NL(H2) per kWh of absorbed microwave energy. The results were obtained in the case of isopropanol dry reforming. The presented catalyst-free microwave plasma method can be adapted for hydrogen production not only from ethanol, isopropanol and kerosene, but also from different other liquid compounds containing hydrogen, like gasoline, heavy oils and biofuels.

Źródło:

Nukleonika; 2016, 61, 2; 185-190
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

Dry friction damper for supercritical drive shaft

Autorzy:

Perkowski, W.

Powiązania:

https://bibliotekanauki.pl/articles/244094.pdf

Data publikacji:

2016

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

supercritical drive shaft
supercritical propulsion shaft
dry friction damper

Opis:

In this article the construction and mathematical model of a dry friction damper with radial gap, designed for dumping flexural vibrations of a supercritical propulsion shaft (developed previously during design works made in Institute of Aviation on propulsion system for an ultralight IS-2 helicopter), while passing through the resonance is presented. Some results of mathematical and numerical analyses of such a system (supercritical shaft + damper) behaviour are also presented – among other things, very distinctive behaviour of the shaft, while passing through resonance, is shown. From a theoretical point of view, it is interesting that certain range of damper parameters, obtained in the course of numerical analysis, lead to chaotic vibrations of the system (they were also observed in practice). From a practical point of view, it will be interesting that the article shows a way how to create a dimensionless (and therefore general) parameters of the system: supercritical shaft and friction damper and also simple engineering methodology for selection of suitable (for the correct operation of the shaft) damper parameters depending on the parameters of the shaft, developed during series of analyses. The practical aspect of the problem seems to be particularly important, as the supercritical propulsion shaft equipped with a friction damper can be very structurally simple, light and inexpensive, and still it is not widely used, probably because of certain doubts aroused in the constructors by the term: “resonant vibrations”.

Źródło:

Journal of KONES; 2016, 23, 4; 389-396
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

Development of a colourimetric method for quality control of sausage products produced using chitinous food additives

Autorzy:

Murashеv, Sergey V.
Elena A. Gorlach, Elena A. Gorlach
Chertov, Alexander N.
Gorbunova, Elena V.
Kiprushkina, Elena I.

Powiązania:

https://bibliotekanauki.pl/articles/1034110.pdf

Data publikacji:

2020

Wydawca:

Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe

Tematy:

calcium
dietary supplement
dry-cured sausage
quality control
‘Hizitel’

Opis:

A crucial technological task that must be solved in the production of sausage products is to stabilize the product’s red colour. In this paper, we propose a scheme to determine the most significant parameters of the quality of dry-cured sausages by their colour characteristics. For this purpose, colour digital images were obtained, which were further processed using two classical colour representation systems: RGB and xyY. We monitored changes in pH and the ratio of water to dry matter in meat products. These crucial sausage properties were changed by introducing chitin-containing supplements into their recipes, which allowed us to solve two tasks simultaneously. The first comprises, as already mentioned, changing the properties of sausages to obtain correlations with colour characteristics. The second is to enrich meat products with chitin complex for preventive purposes to improve people’s nutrition. The construction of correlation dependencies using each coordinate separately in two colour systems showed that each system (RGB and xyY) has one colour channel with a maximum correlation coefficient. This is due to the colour features of sausages, which can be represented to the greatest extent with the help of only one colour coordinate in the considered colour representation systems (RGB and xyY). Using these colour coordinates will allow one to achieve maximum measurement accuracy. Thus, two tasks are being solved: the enrichment of food with dietary supplement and the development of a method to control their content.

Źródło:

Progress on Chemistry and Application of Chitin and its Derivatives; 2020, 25; 151-163
1896-5644

Pojawia się w:

Progress on Chemistry and Application of Chitin and its Derivatives

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

Relationship between performance, dry-land power and kinematics in master swimmers

Autorzy:

Espada, M. C.
Costa, M. J.
Costa, A. M.
Silva, A. J.
Barbosa, T. M.
Pereira, A. F.

Powiązania:

https://bibliotekanauki.pl/articles/307228.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

pływanie
kinematyka
energia
master swimmers
kinematic
dry-land power
performance

Opis:

The purpose of the study was to analyze the relationships between sprint swimming performance, dry-land power, and kinematics in master swimmers. Twenty-two male master swimmers were separated in two groups based on their chronological age: (i) 30–39 years and; (ii) 40–49 years. Maximum dry-land power was determined through counter movement jump and 3 kg medicine ball throwing (H_max and T_max, respectively). Kinematic determinants of performance were measured during a maximal bout of 15, 25 and 50 m front crawl (T15, T25, T50). Stroke frequency (SF), stroke length (SL) and stroke index (SI) were calculated as kinematical aspects of the stroke. In the 30-39 group, SI25 was correlated to T25 (r = –0.76, p < 0.01, η² = 0.96), the same was observed between SI50 and T50 (r = –0.83, p < 0.01, η2 = 0.96). Only SI50 was significantly correlated to T50 (r = –0.86, p < 0.01, η² = 0.97) in the 40–49 years age cohort. In dryland power variables, Hmax and Tmax were only correlated in the younger master swimmers group (r = –0.87, p < 0.01, η2 = 0.97). There were no significant differences (p < 0.05) between younger (30–39 years) and older (40–49 years) swimmers groups in dry-land tests (H_max 28.5 ± 5.9 vs. 26.5 ± 3.9 cm and T_max 4.2 ± 1.0 vs. 4.2 ± 1.1 m). Our results suggest that swimming performance in younger master swimmers (30–39 years) seem more dependent on kinematic swimming variables than on strength parameters, which were most related to swimming performance in the older master swimmers (40–49 years).

Źródło:

Acta of Bioengineering and Biomechanics; 2016, 18, 2; 145-151
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

Dry ice compaction in piston extrusion process

Autorzy:

Górecki, J.
Malujda, I.
Talaśka, K.
Wojtkowiak, D.

Powiązania:

https://bibliotekanauki.pl/articles/386480.pdf

Data publikacji:

2017

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

dry ice
carbon dioxide
compaction
agglomeration process
extrusion tube reducer

Opis:

The article presents the results of research on the effect of extrusion tube geometry on the axial force being the key parameter of the dry ice piston extrusion process. The tests were carried out with the experimental set-up based on a cylindrical extrusion tube used alone and supplemented with reducer (orifice). The focus of the experiments was to determine the effect of compression tube reducer on the value of the force of resistance FOP in the dry ice compression process. Its value can subsequently be used as the basis for establishing guidelines for designing and building machines for compression and pelletizing of dry ice.

Źródło:

Acta Mechanica et Automatica; 2017, 11, 4; 313-316
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

Wpływ parametrów suszenia na ubytek masy suchej substancji podczas rehydratacji suszonych jabłek
Impact of drying parameters on the loss of dry substance mass during rehydration of dried apples

Autorzy:

Kaleta, A.
Górnicki, K.
Choińska, A.
Winiczenko, R.

Powiązania:

https://bibliotekanauki.pl/articles/289282.pdf

Data publikacji:

2013

Wydawca:

Polskie Towarzystwo Inżynierii Rolniczej

Tematy:

suszenie
rehydratacja
sucha substancja
jabłko
drying
rehydration
dry substance
apple

Opis:

Celem pracy była analiza wpływu parametrów suszenia na ubytek masy suchej substancji suszonych jabłek odmiany Ligol podczas ich rehydratacji. Jabłka krojone w plastry o grubości 3 i 10 mm i kostki o boku 10 mm suszono następującymi metodami: konwekcja naturalna (temperatura suszenia 60ºC), konwekcja wymuszona (suszarka tunelowa, parametry powietrza suszącego: 50, 60, 70ºC oraz 0,5, 2 m·s-1), suszenie fluidalne (60ºC). Susz rehydratowano w wodzie destylowanej o temperaturze 20ºC. Badania wykazały statystycznie istotny wpływ rozdrobnienia suszonych cząstek na ubytek ich masy suchej substancji podczas rehydratacji. Badania nie wykazały natomiast statystycznego istotnego wpływu temperatury suszenia na ubytek masy suchej substancji oraz wpływ zastosowanych metody suszenia na końcową wartość ubytku masy suchej substancji suszonych jabłek w wyniku ich rehydratacji.
The objective of the paper was to analyse the impact of drying parameters on the loss of dry substance mass of dried apples of Ligol cultivar during their rehydration. Apples cut into 3 and 10 mm slices and 10 mm cubes were dried with the following methods: natural convection (temperature of drying°C), forced convection (a tunnel drier, parameters of drying air: 50, 60, 70°C and 0,5, 2 m·s-1), fluid drying (60°C). Dried fruit were rehydrated in the distilled water of 20°C temperature. Research proved statistically significant impact of fragmentation of dried fractions on the loss of their dry substance mass during rehydration. Whereas research did not prove statistically significant impact of drying temperature on the loss of dry substance mass and impact of the applied methods of drying on the final value of loss of dry substance mass of dried apples as a result of rehydration.

Źródło:

Inżynieria Rolnicza; 2013, R. 17, nr 4, t. 1, 4, t. 1; 111-120
1429-7264

Pojawia się w:

Inżynieria Rolnicza

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

Sleep apnea and dry eye: how sleep apnea affects the eye surface

Autorzy:

Bommert, Catherina M.
Grupcheva, Christina N.
Radeva, Mladena N.
Grupchev, Dimitar I.
Boyadzieva, Maria R.

Powiązania:

https://bibliotekanauki.pl/articles/1927968.pdf

Data publikacji:

2020-06-30

Wydawca:

Medical Education

Tematy:

continuous positive airway pressure
dry eye syndrome
obstructive sleep apnea

Opis:

Purpose: The purpose of this study was to determine the presence of dry eye disease and possible treatment options in patients with obstructive sleep apnea and continuous positive airway pressure. Materials and methods: A total of 72 patients (midlife age) with obstructive sleep apnea and continuous positive airway pressure therapy underwent a comprehensive eye examination. Fluorescein staining of the anterior ocular surface and tear break-up test were performed. All of the patients who were diagnosed with dry eye disease received personalized therapy. One month later, re-examination was performed using the same methodology and clinical settings. Results: On the first examination, 48 of 72 patients (66.67%) were diagnosed with dry eye disease. Floppy eyelid syndrome was reported in 26 patients (54.17%) with dry eye disease. The treatment of 40 patients included artificial tear supplements during the day in combination with high-viscosity topical gels before bedtime. In more severe cases (10.42% of all participants), the application of bandage contact lenses for 3 months was necessary. Because of excessive lid laxity, surgical reconstruction of the eyelids was performed in three patients (6.25%). Conclusions: A multidisciplinary approach is essential for obstructive sleep apnea. Practitioners from different specialties must be well acquainted with risk factors, signs, and symptoms. The early detection of dry eye disease in patients with obstructive sleep apnea and appropriate treatments are important for improving the quality of life in this patient group.

Źródło:

OphthaTherapy; 2020, 7, 2; 103-107
2353-7175
2543-9987

Pojawia się w:

OphthaTherapy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 58.

Tytuł:

Use of selected improvers in triticale flour breadmaking

Autorzy:

Achremowicz, B.
Gambus, H.
Kolodziej, Z.

Powiązania:

https://bibliotekanauki.pl/articles/1372715.pdf

Data publikacji:

1996

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

triticale flour
baking improver
breadmaking
dry gluten
bread
carbohydrate technology

Opis:

The suitabilty of the baking improver A (the mixture of full-fat milk powder and vitamin C), AKO, Artisan, Magimix 35 and soybean flour was studied for improving bread from Malno triticale flour of poor baking quality (the wet gluten content 132 g/kg). The flour was fortified with vital wheat gluten at the rate of 10 g/kg or 20 g/kg. Due to the fortification, baking loss decreased by 23 g/kg to 30 g/kg, on average, and the bread yield increased by 53 g/kg, on average. The organolepti-cally tested bread quality did not improve and the bread staling rate was not affected. The improver AKO (20 g/kg) and Artisan (40 g/kg) increased the crumb elasticity and volume (by 64 mL) of the bread from the fortified triticale flour. The staling rate of breads with improvers was more rapid than breads without improvers.
Mąkę pszenżytnią z odmiany Malno uzyskaną z przemiału laboratoryjnego i wzbogaconą dodatkiem glutenu witalnego w ilości 10 lub 20 g na 1 kg mąki, w celu poprawienia jej wartości wypiekowej (Tabela 1), użyto do wypieku chleba. Wypiek laboratoryjny przeprowadzono metodą jednofazową. W celu polepszenia jakości pieczywa do wypieków dodawano także następujące polepszacze piekarskie: polepszacz A czyli mieszaninę mleka pełnego w proszku i witaminy C, AKO, Artisan, Magimix 35, mąkę sojową. Dodatek glutenu witalnego do mąki pszenżytniej zmniejszał straty piekarskie i zwiększał wydajność pieczywa (Tabela 2) ale nie poprawiał jakości chlebów. Spośród zastosowanych polepszaczy najbardziej efektywnie na jakość chleba pszenżytniego wpłynęły Artisan, AKO, Magimix 35 oraz polepszacz A (Tabela 3). Podobnie korzystny wpływ na objętość i elastyczność miękiszu zaobserwowano w przypadku dodatku 10 g glutenu witalnego na 1 kg mąki i zastosowaniu polepszaczy Artisan oraz AKO. Proces starzenia się, oceniany na podstawie zmian wilgotności miękiszu w czasie 3 dni przechowywania w temperaturze pokojowej, przebiegał szybciej w chlebach z dodatkiem polepszaczy, a dodatek glutenu nie miał większego wpływu na tę cechę (Tabela 4).

Źródło:

Polish Journal of Food and Nutrition Sciences; 1996, 05, 1; 73-81
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

Study on potential of soil stabilization using concrete sludge of batching plant (CSBP)

Autorzy:

Nawi, Nur M.
Mat Yusof, Doris A.
Sharipudin, Siti S.
Mohd Halim, Nora F.
Mohamad, Nor M.

Powiązania:

https://bibliotekanauki.pl/articles/35554294.pdf

Data publikacji:

2022

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

CBR value
concrete sludge
organic soil
maximum dry density
subgrade

Opis:

More than 8 t of fresh concrete waste may be created and returned to the batching plants throughout Malaysia, where it will degrade into concrete sludge. Most batching plants will dump their concrete sludge on the ground or at a landfill which is not eco-friendly at all. Consequently, this study is to investigate the potential of concrete sludge of batching plant (CSBP) to be used as the stabilized material for organic soil which indirectly can help to recycle CSBP from end up at the landfill. The Atterberg limit test was conducted to identify the characteristic of soil used in this study. Four different percentages of CSBP were used which are 0, 5, 10 and 15%. Then, the standard Proctor test and California bearing ratio test were performed, and it shows that the CBR value remarkably increases from 4.8 to 20.7%, with the rise of CSBP percentages from 0 to 15%. The finding shows that CSBP can be used as the potential material to enhance the trend of strength value of CBR. Thus, using CSBP as a stabilized material for organic soil would alleviate the problem of overflowing landfills with concrete sludge and encourage a more sustainable approach in the construction industry.

Źródło:

Scientific Review Engineering and Environmental Sciences; 2021, 30, 4; 552-560
1732-9353

Pojawia się w:

Scientific Review Engineering and Environmental Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 60.

Tytuł:

The frequency of normal and abnormal sums of atmospheric falls in Lebork in 1861-2000
Częstość okresów normalnych i anormalnych sum opadów atmosferycznych w Łęborku w latach 1861-2000

Autorzy:

Kirschenstein, M.
Baranowski, D.

Powiązania:

https://bibliotekanauki.pl/articles/85135.pdf

Data publikacji:

2008

Wydawca:

Akademia Pomorska w Słupsku

Tematy:

atmospheric fall normal sum
atmospheric fall abnormal sum
atmospheric fall
Lebork town
dry period
wet period
season
extremely condition
extremely wet
extremely dry

Opis:

The authors of the present paper made an attempt to determine frequency of average, dry and wet periods for months, seasons, half-years and years. Additionally a comparison of data recorded dur-ing 140 years allows to check the structure of excessively wet and excessively dry years’ patterns. The present paper is based on the Z. Kaczorowska’s classification (1962).
Przeprowadzono ocenę częstości pojawiania się okresów przeciętnych, suchych i wilgotnych dla miesięcy, pór roku, półroczy i roku. Ponadto, zestawienie danych ze 140 lat (1861- -2000) daje możliwość sprawdzenia, w jaki sposób układały się lata nadmiernie wilgotne i nadmiernie suche. W opracowaniu przyjęto klasyfikację Z. Kaczorowskiej (1962). Na podstawie przeprowadzonej analizy udowodniono, że w okresie 1861-2000 częściej występowały lata, półrocza, pory roku i miesiące nadmiernie suche niż nadmiernie wilgotne. W przypadku sum rocznych nie wystąpiły lata skrajnie suche i skrajnie wilgotne, a częstość lat nadmiernie suchych była o 4% większa niż nadmiernie wilgotnych. W półroczu ciepłym również nie wystąpiły lata skrajnie suche, ale pojawiły się lata skrajnie wilgotne. W półroczu chłodnym różnice były większe – wystąpił 1 rok skrajnie suchy i 5 lat skrajnie wilgotnych. Z porównania pór roku wynika, że najwięcej przeciętnych lat wystąpiło – latem, nadmiernie suchych – wiosną i nadmiernie wilgotnych – zimą. Sumy miesięczne charakteryzowały się zmniejszeniem częstości przeciętnych miesięcy i wzrostem skrajnie suchych oraz skrajnie wilgotnych. Najwięcej miesięcy skrajnie suchych wystąpiło w marcu, kwietniu i październiku, natomiast skrajnie wilgotnych – w czerwcu, sierpniu, wrześniu, listopadzie i grudniu. Największe wahania względem średniej wieloletniej wystąpiły w październiku (3-329%). Określenie czasu trwania okresów przeciętnych, suchych i wilgotnych potwierdza bardzo dużą zmienność występujących po sobie okresów z nadmiarem lub niedoborem opadów: – najdłuższe okresy trwały 7 lat i wystąpiły 3 razy w miesiącach nadmiernie suchych (styczeń, marzec, listopad) oraz 1 raz wiosną, która była nadmiernie wilgotna, – na ogół okresy nadmiernie suche trwały dłużej niż nadmiernie wilgotne, – bardzo krótko trwały okresy przeciętne. Tylko w lipcu wystąpił okres sześcioletni (1890-1895), w styczniu i sierpniu najdłuższe okresy trwały 3 lata, w pozostałych miesiącach 2 lata, wyjątek stanowi wrzesień, w którym okres nie był dłuższy niż rok.

Źródło:

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2008, 12
1643-0115

Pojawia się w:

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 61.

Tytuł:

The influence of alkaline promoters on the properties of the Ni/HAp catalyst in the methane dry reforming reaction

Autorzy:

Cichy, Marcin
Zawadzki, Witold

Powiązania:

https://bibliotekanauki.pl/articles/29521159.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

hydrogen
synthesis gas
nickel catalyst
dry reforming
coking
alkaline promoter

Opis:

The reforming of methane with carbon dioxide is still of great interest due to the ever-increasing demand for synthesis gas and hydrogen. This process makes it possible to use two major gases that are considered harmful to the environment. The main problem for its commercial application is the lack of a catalyst that is both active, selective towards syngas (a mixture of hydrogen and carbon monoxide) and resistant to deactivation by coke deposition. Nickel is the most commonly used metal in methane reforming reactions due to its high activity and reasonable price. But still there is a gap in the literature for research on novel catalysts and their properties modifications devoted to strategies to reduce deactivation of the catalysts caused by the coke formation. In the present work a series of hydroxyapatite supported nickel catalysts promoted by alkali metals (Li, Na, K and Cs) were tested. The surface and structural properties of the catalysts were well characterized by physicochemical methods. Activity and selectivity were measured at 600ºC for 20 hours’ time-on-stream test. Resistance to coking was measured with Magnetic Suspension Balance. The stability of the catalyst was improved by the addition of promoters, which reduced the rate of coking. In particular, the cesium-promoted Ni/HAp catalyst significantly inhibited coke deposition, while slightly reducing methane conversion and selectivity to hydrogen.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 4; art. no. 182856
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 62.

Tytuł:

The use of dry needling to treat painful shoulder syndrome: a case report

Autorzy:

Rajfur, J.
Rajfur, K.
Kosowski, L.
Matusz, T.

Powiązania:

https://bibliotekanauki.pl/articles/2087969.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Opolski. Instytut Nauk o Zdrowiu

Tematy:

painful shoulder syndrome
dry needling
VAS scale
Laitinen Questionnaire
goniometer

Opis:

Background: Painful shoulder syndrome is a common condition in society. Most patients experience pain and reduced mobility of the affected limb, which can have an impact on the quality of life. This report presents a case of a patient with pain and reduced range of motion in the left shoulder. Aim of the study: The study aim was to evaluate the efficacy of dry needling in the treatment of painful shoulder syndrome, based on functional measures of pain, disability and range of motion. Case report: A 42-year old patient reported pain in her left shoulder. A series of 6 dry needling sessions were performed, twice a week, for a period of 3 weeks. Prior to, and immediately after, the therapy a subjective pain assessment using the VAS pain rating scale and an assessment of the degree of disability using the Modified Laitinen Pain Questionnaire were performed. The range of motion within the shoulder girdle was also measured with a goniometer. Conclusions: Following the dry needling therapy, a reduction in pain and improved shoulder girdle mobility was observed.

Źródło:

Medical Science Pulse; 2020, 14, 2; 60-63
2544-1558
2544-1620

Pojawia się w:

Medical Science Pulse

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 63.

Tytuł:

Lato, koronawirus i zespół suchego oka – skuteczne metody leczenia
Summer, coronavirus and dry eye syndrome – effective treatments

Autorzy:

Misiuk-Hojło, Marta
Jasina, Grzegorz

Powiązania:

https://bibliotekanauki.pl/articles/1927949.pdf

Data publikacji:

2020-06-30

Wydawca:

Medical Education

Tematy:

coronavirus
dry eye syndrome
summer
koronawirus
lato
zespół suchego oka

Opis:

Od grudnia pandemia COVID-19 dotyka wiele osób. Dzisiaj żyjemy w innej rzeczywistości. Jednak mimo śmiertelnego zagrożenia dalej musimy nieść pomoc pacjentom z rozmaitymi problemami medycznymi. Często do gabinetu okulistycznego trafiają osoby z zespołem suchego oka. Zwykle nie jest to poważna komplikacja, jednak może dotkliwie utrudniać życie pacjentów, a w wyjątkowych sytuacjach zrujnować ich widzenie. W pracy zostaną przedstawione objawy zespołu suchego oka, jego przyczyny, a także skuteczne metody leczenia. Omówiono również problem COVID-19 jako jednostki chorobowej, objawy oczne, które może powodować, oraz częstość występowania objawów okulistycznych u osób z tą chorobą. Ponadto opisany został związek między koronawirusem a zespołem suchego oka.
Since December, the COVID-19 pandemic has been affecting many people. Today we live in a different reality. However, despite the lethal threat, we still need to help patients with various medical problems. Often people with dry eye syndrome visit the ophthalmology’ consulting room. It’s usually not a serious complication, but it can severely hinder patients' lives and, in exceptional cases, ruin their vision. The article will present the symptoms of dry eye syndrome, causes and effective treatments. There are also discussed: the problem of COVID-19 as a disease entity, ocular symptoms whom may cause and the incidence of eye symptoms among people with this disease. In addition it will be described the connection between coronavirus and dry eye syndrome.

Źródło:

OphthaTherapy; 2020, 7, 2; 168-172
2353-7175
2543-9987

Pojawia się w:

OphthaTherapy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 64.

Tytuł:

Lecytyna i jej rola w farmaceutycznych emulsjach suchych
Lecithin and its role in dry pharmaceutical emulsions

Autorzy:

Kulawik, A.
Tal-Figiel, B.
Warżel, M.

Powiązania:

https://bibliotekanauki.pl/articles/2071507.pdf

Data publikacji:

2011

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

lecytyna
sucha emulsja farmaceutyczna
liofilizacja
lecithin
dry pharmaceutical emulsion
lyophylization

Opis:

Praca zawiera wyniki badań właściwości farmaceutycznych emulsji pierwotnych, do receptury których wprowadzono lecytynę. Na podstawie badań wykazano, że istnieje możliwość zmiany wartości lepkości emulsji pierwotnej bez konieczności zmiany jej składu. Ma to ogromne znaczenie ze względu na fakt, iż lepkość emulsji determinuje porowatość struktury emulsji suchej, a ta jej najważniejszą cechę - czas rozpadu. Dla badanego zakresu stężeń nic udało się uzyskać stabilnych emulsji suchych metodą liofilizacji.
The aim of this work was to describe properties of primary pharmaceutical emulsions containing lccithin. The studies have shown that it was possible to change viscosity of primary emulsion without changing its composition. This is important due to the fact that viscosity of emulsion determines dry emulsion porosity and its most important feature disintegration time. For this recipe of emulsion it was not possible to obtain stable lyophilized dry emulsion.

Źródło:

Inżynieria i Aparatura Chemiczna; 2011, 5; 62-63
0368-0827

Pojawia się w:

Inżynieria i Aparatura Chemiczna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 65.

Tytuł:

Blade couple connected by damping element with dry friction contacts

Autorzy:

Pešek, L.
Půst, L.

Powiązania:

https://bibliotekanauki.pl/articles/279521.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

dry friction
three masses system
damping of vibrations
irregular vibrations

Opis:

Theoretical and experimental solutions of forced vibration of a three-mass system linked together by two dry friction connections are presented. This system is a computational model of a physical model of a blade couple with a friction element measured in dynamic laboratory of Institute of Thermomechanics AS CR. Numerical solution of strongly nonlinear equations of motion shows good damping properties of the dry friction element and correspond to the results of experimental research, which is oriented on the investigation of both forced and free vibration of the physical blade couple model.

Źródło:

Journal of Theoretical and Applied Mechanics; 2014, 52, 3; 815-826
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 66.

Tytuł:

Experimental study of the shear resistance of granular material: influence of initial state

Autorzy:

Flitti, A.
Della, N.
Verástegui Flores, R. D.

Powiązania:

https://bibliotekanauki.pl/articles/282069.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

dry sand
fine content
water content
grain size
depositional method

Opis:

The shear strength of sand and its mechanical properties can be affected by numerous parameters. This work presents an experimental investigation which aims to study the influence of the fines content, the depositional method and the grain size on the shear strength of Chlef sand. Tests were conducted with the shear box on two types of soil, the natural sand and the clean sand-silt mixture. Dense samples (Dr = 88%) were reconstituted through dry deposition for each type of the material. An additional series of tests was carried out on a medium dense natural sand (Dr = 52%) prepared by dry and wet (w = 3%) deposition methods. All specimens were subjected to normal stresses of 100 kPa, 200 kPa and 300 kPa and there was no immersion of water. The tests results show that the behavior of sand can be affected by three parameters, the fines content, the deposition method and the particle size. The maximum shear stress and the friction angle decrease as the fines content increases, the initial water content increases, the effective grain size diameter decreases and the uniformity coefficient increases. The cohesion intercept increases with the increasing fines content and decreasing initial water content. Overall, the samples prepared by the dry deposition method show more resistance than those prepared by the wet deposition method. The results obtained are generally in agreement with the previous research on drained and undrained saturated sand in the literature.

Źródło:

Journal of Theoretical and Applied Mechanics; 2017, 55, 2; 523-533
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 67.

Tytuł:

Trial of liquidation cementation of boreholes at Carpathians oil and gas deposits

Autorzy:

Kovalchuk, M.
Tershak, B.
Cheliadyn, L.
Sobol, K.
Terlyha, V.

Powiązania:

https://bibliotekanauki.pl/articles/390185.pdf

Data publikacji:

2015

Wydawca:

Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej

Tematy:

borehole
dry plugging mixes
cementation
dehydration
chemical admixture
boring casing

Opis:

Complex geological structure as well as long-term intensive operation of oil and gas deposits in Borislav-Pokutska zone of Carpathians leads to changes in thermo-dynamical parameters of pools, rock deformation and, as a result, to crippling of the boreholes and creasing and damaging of boring casing. The abovementioned actions not only complicate extraction of oil and gas but increase the technological charge on the environment. In this study 3 types of materials were investigated: PCT-I-100 – traditional tamping cement, CREA and CREA-LF tamping mixes produced by dry mixing technology that were designed by authors. Dry mixes are characterized by higher level of SiO2 because of addition of milled sand and provide better cementation quality. Developed materials are characterized by lower dehydration and water reduction, thanks to clearly chosen composition and modern chemical admixtures usage. The method of borehole eliminative cementation is also presented by authors.

Źródło:

Budownictwo i Architektura; 2015, 14, 2; 71-80
1899-0665

Pojawia się w:

Budownictwo i Architektura

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 68.

Tytuł:

Sjögrens syndrom – the review of the latest diagnostic guidelines essential for otolaryngologists

Autorzy:

Kruk, Karolina
Rzepakowska, Anna
Osuch-Wójcikiewicz, Ewa
Niemczyk, Kazimierz

Powiązania:

https://bibliotekanauki.pl/articles/1399442.pdf

Data publikacji:

2019

Wydawca:

Index Copernicus International

Tematy:

autoimmune sialadenitis
dry mouth
dryness syndrome
sicca syndrome
Sjögren syndrome

Opis:

Sjogren’s syndrome (SS) is a complex connective tissue disease with autoimmune background and high clinical, radiological and molecular heterogeneity. SS is typically manifested by sicca syndrome, characterized by dry eyes and dry mouth due to autoimmune-induced inflammation of the lacrimal and salivary glands. Complications of sicca syndrome are dental caries, oral candidiasis, dysosmia, dysgeusia, difficulties in swallowing and chewing. SS may coexist with other diseases of rheumatoid and autoimmune etiology. SS is linked to an 16-fold increased risk of non-Hodgkin lymphoma. Early diagnosis results in appropriate treatment and may slow down the course of the disease and limit extraglandular involvement. Due to diverse clinical phenotypes and symptomatology, establishing of the diagnosis is often difficult. In 2016 the AmericanEuropean Consensus Group (AECG) and European League Against Rheumatism (EULAR) proposed a classification system that defines SS as a systemic disease. Diagnostic tools in establishing SS diagnosis are serological tests, ultrasonography, Schirmer’s test, unstimulated whole saliva flow rate and Ocular Staining Score. The complete curing of SS is still not possible. As a complex multisystem disease, SS requires multidisciplinary cooperation and individual diagnostic and therapeutic approaches in patients. Therapy is focused on the treatment of symptoms and prophylaxis of complications. The laryngological treatment of oral cavity symptoms in SS include supervision of proper oral hygiene habits and adequate fluids supplementation. The EULAR Sjögren’s syndrome disease activity index (ESSDAI) and Clinical Oral Dryness Score(CODS) are used to monitor disease progression and treatment effectiveness.

Źródło:

Polski Przegląd Otorynolaryngologiczny; 2019, 8, 2; 1-6
2084-5308
2300-7338

Pojawia się w:

Polski Przegląd Otorynolaryngologiczny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 69.

Tytuł:

Connections between the Dry Bulk Freight Index and the Cyclical Economic Activity of the G7 Countries

Autorzy:

Wagner, Natalia

Powiązania:

https://bibliotekanauki.pl/articles/503928.pdf

Data publikacji:

2015

Wydawca:

Międzynarodowa Wyższa Szkoła Logistyki i Transportu

Tematy:

shipping market
business cycle
Baltic Dry Index
freight index
spectral analysis

Opis:

The article analyses the connections between the dry bulk freight market and the economic activity of certain countries. The objective was to confirm the existence of a similar cyclical nature for the Baltic Dry Index and main indicators of the business cycle of the G7 countries. The applied macroeconomic variables were: the real GDP and the industrial production index. In examination a spectral analysis was used. The discovered identical periodicities were analyzed in terms of time relations. It was demonstrated, that the cyclical part of the BDI (periodicity of 13.1 and 15.3 quarters) either leads or is coincident with the indicators of the business cycle. The global financial crisis in 2008-2009 showed that the behaviour of freight indices was similar to stock exchange indices and macroeconomic variables in advanced economies. It is worth to observe shipping market because higher values of freight indices could anticipate increasing demand for sea trade and economic growth.

Źródło:

Logistics and Transport; 2015, 25, 1; 71-82
1734-2015

Pojawia się w:

Logistics and Transport

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 70.

Tytuł:

Niskotemperaturowe charakterystyki tribologiczne stalowych skojarzeń ciernych
Low-temperature characteristics of steel friction couples

Autorzy:

Mańkowska, A.
Michalczewski, R.
Szczerek, M.
Wulczyński, J.

Powiązania:

https://bibliotekanauki.pl/articles/189292.pdf

Data publikacji:

2010

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

tarcie technicznie suche
zużycie
niska temperatura
dry friction
wear
low temperature

Opis:

Dane zawarte w katalogach materiałowych dotyczące właściwości tribologicznych materiałów podawane są dla warunków pracy w temperaturach dodatnich, co może być błędne w przypadku ich wykorzystania przy doborze materiałów na pary tarciowe przeznaczone do pracy w niskich temperaturach. Istniejące metody badawcze realizowane w pokojowej temperaturze otoczenia nie pozwalają na wnioskowanie o tarciowo-zużyciowych charakterystykach materiałów w warunkach niskich temperatur. Celem przedstawionej w niniejszym artykule pracy było porównanie charakterystyk tribologicznych uzyskiwanych dla powszechnie stosowanych materiałów konstrukcyjnych w warunkach temperatur dodatnich oraz ujemnych. Badania z wykorzystaniem opracowanego w Instytucie Technologii Eksploatacji – PIB urządzenia badawczego o symbolu T-25, przeznaczonego do badań w niskich temperaturach w ślizgowym styku trzpień–tarcza (pozwalającego na oziębianie węzła tarcia do temperatury -60oC), przeprowadzono dla stalowych skojarzeń: C45/100Cr6, CT120/100Cr6 i 100Cr6/100Cr6. W wyniku przeprowadzonych badań wykazano, że w obniżonych temperaturach średnia wartość współczynnika tarcia, dla wszystkich przebadanych skojarzeń, jest różna (w zbadanych przypadkach – większa) niż uzyskiwana w temperaturze pokojowej. Dla każdego skojarzenia materiałowego istnieje temperatura, w której uzyskano minimum zużycia; wynosi ona odpowiednio: -10°C dla skojarzenia C45/100Cr6, 0°C dla CT120/100Cr6 i -45°C dla 100Cr6/100Cr6.
Most of the data presented in handbooks concerning the properties of materials, are given for room temperature, that can lead to a mistake when they are selected for manufacturing of mechanical parts (friction joints) working under low-temperature conditions. The existing test methods are realised at room temperature and are not helpful in the predicting of the low-temperature tribological behaviour of the friction joint materials. The work aimed at comparison of the tribological characteristics for commonly used steels at room and low-temperature applications. The tests were performed by means of T-25 tribotesters intended for the investigation of the materials at low-temperature conditions (down to -60°C), in sliding movement, using pin-on-disk tribosystem. Three tribosystems were tested: C45/100Cr6, CT120/100Cr6 and 100Cr6/100Cr6. The performed results indicate that tribological characteristics of (pin/disk) commonly used materials depend on the ambient temperature of the friction joints. At low-temperature conditions the friction coefficient values, for all tested tribosystems, were significantly higher than obtained for room temperature. For each tribosystem it was possible to indicate the temperature of the optimum value of wear (minimum wear), respectively: -10°C for C45/100Cr6, 0°C for CT120/100Cr6 and -45°C for 100Cr6/100Cr6.

Źródło:

Tribologia; 2010, 1; 77-92
0208-7774

Pojawia się w:

Tribologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 71.

Tytuł:

Lubrication impact on the value of friction coefficient of coffee beans sliding ever the steel surfaces of various roughness

Autorzy:

Kuzminskyi, R.
Sokolovskyi, O.
Lozovyi, R.
Sheremeta, R.
Zholobko, V.

Powiązania:

https://bibliotekanauki.pl/articles/411159.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Oddział w Lublinie PAN

Tematy:

coffee beans
steel surfaces
roughness
dry friction
sliding friction coefficient
lubrication

Opis:

The article analyzes the influence of steel surfaces processing quality on the value of sliding friction coefficient of Robusta and Arabica coffee beans at dry and lubricated fricbica. The research obtained coffee dry and lubrication functions and parameters of sliding friction coefficients distributions and mathematical models for determining the index which depends on the roughness of steel surfaces.

Źródło:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2014, 3, 4; 91-95
2084-5715

Pojawia się w:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 72.

Tytuł:

Dry port as a lean and green strategy in a container terminal hub: a mathematical programming model

Autorzy:

Digiesi, Salvatore
Facchini, Francesco
Mummolo, Giovanni

Powiązania:

https://bibliotekanauki.pl/articles/406891.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

lean logistic
container terminal
material handling
container relocation problem
dry port

Opis:

Maritime freight transport represents an effective solution, allowing to ensure a low-impact service both under an economic and a sustainable perspective. As a consequence, in the last ten years, an increasing trend of goods transported by sea has been observed. In order to improve the terminal containers’ performance, recently published scientific studies shown the applicability of the ‘lean logistic’ concept as a strategic key for ensuring a continuous improvement of the logistic chain for inter-/intra terminal containers’ activities. According to this approach, the adoption of a dry port can positively affect terminal containers’ performance, but this requires resources and investments due to inter-terminal activities (e.g. transport of the container from port to dry port and vice versa). The purpose of the study is to develop a mathematical programming optimization model to support the decision making in identifying the best containers’ handling strategy for intermodal facilities, according to lean and green perspectives. Numerical experiments shown the effectiveness of the model in identifying efficient material handling strategies under lean and green perspective.

Źródło:

Management and Production Engineering Review; 2019, 10, 1; 14-28
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 73.

Tytuł:

Dry ports-seaports sustainable logistics network optimization: considering the environment constraints and the concession cooperation relationships

Autorzy:

Wei, H.
Sheng, Z

Powiązania:

https://bibliotekanauki.pl/articles/259387.pdf

Data publikacji:

2017

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

dry port
port logistics
logistics network
location-allocation
sustainable
relationships evaluation

Opis:

In China dry ports enter into a rapid development period now, however for many Chinese dry ports, the operation faces difficulties duo to inefficient logistics networks and cooperation relationship between dry ports and seaports. Focusing on the concession cooperation mechanism of seaports and dry ports, and the environmental constraints (carbon emissions and congestion cost), a bi-objective location-allocation MILP model for the sustainable hinterland-dry ports-seaports logistics network optimization is formulated, aiming at the system logistics costs and carbon emissions to be minimized. Moreover, for the cooperation mechanism of seaports to dry ports, a parameter called cooperation cost concession coefficient is proposed for the optimization model, and a new evaluation method based on the ordered weighted averaging (OWA) operator is used to evaluate it. Then a location-allocation decision-making framework for the hinterland-dry port-seaport logistics network is proposed. The innovative aspect of the model is that it can proposes a effective and environment friendly dry ports location strategic and also give insights into the connective cooperation relationships, and cargo flows of the network. A case study involving configuration of dry ports in Henan Province is conducted, and the model is successfully applied.

Źródło:

Polish Maritime Research; 2017, S 3; 143-151
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 74.

Tytuł:

Determination of Probability Distribution Function for Modelling Path Loss for Wireless Channels Applications over Micro-Cellular Environments of Ondo State, Southwestern Nigeria

Autorzy:

Abiodun, Chukwutem Isaac
Ojo, Joseph Sunday

Powiązania:

https://bibliotekanauki.pl/articles/1075736.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Path loss
normal distribution
probability distribution function
wet and dry season

Opis:

In this research, the most appropriate probability distribution function for modelling RF signal path loss values in both wet and dry season months over urban, suburban and rural environments of Ondo State are presented. The data used consist of a drive test measurement campaign carried out in a typical urban, suburban and rural areas of Ondo State, South-western Nigeria in both wet and dry season months. The received signal strength (RSS) values were collected and recorded in log files alongside other environmental parameters using TEMS investigation tools. Path loss values were deduced from the measured RSS values. Some selected probability distribution function namely: gamma, lognormal, extreme value, logistic, Weibull and normal distributions function were fitted to the measured path loss values and the best suited one determined using three different metric measures. Results obtained show that normal distribution presents the best probability distribution curve for modelling the RF signal path loss over different micro-cellular environments of Ondo State. A typical result of the rural environment indicates that in wet season months, the normal distribution has RMSE of 7.060 dB, Relative Error of 12.480 % and R2 of 0.988, in dry season months, the RMSE is 9.060 dB, Relative Error of 13.450 % and R2 of 0.985. When compared with other distribution models, the same trend could be seen in other environments, although with different values of RMSE, Relative error and R2. The mean and the standard deviation parameters for the normal distribution estimated, vary seasonal-wise and are environment dependent. However, the rural environment exhibited a wider seasonal variations when compared with the other environments. The results of this research is useful as a first-hand information in the planning of future wireless propagation channels in the studied environments.

Źródło:

World Scientific News; 2019, 118; 74-88
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 75.

Tytuł:

Comprehensive microbiological evaluation of dry foods for growing dogs marketed in Poland
Kompleksowa ocena jakości mikrobiologicznej dostępnych w Polsce suchych karm dla psów rosnących

Autorzy:

Holda, K.
Wiczuk, W.
Hac-Szymanczuk, E.
Glogowski, R.

Powiązania:

https://bibliotekanauki.pl/articles/2669.pdf

Data publikacji:

2017

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

microbiological quality
dry food
growing animal
dog
market
food safety
Polska

Opis:

Comprehensive microbiological evaluation of dry foods for growing dogs marketed in Poland. Microbiological safety is one of the most important parts of qualitative assessment and monitoring of commercially available products intended for canine nutrition. Twenty commercial dry dog foods formulated for growing dogs were surveyed for the prevalence of bacterial contamination. ISO standards were applied to assess total plate counts of mesophilic strains, yeasts and molds, Enterobacteriaceae family andEnterococcus. Moreover, the presence of major pathogenic bacteria was evaluated. The growth of molds was detected in 5 products. Enterobacteriaceae strains were identified in 12 examined foods. Escherichia coli was identified in 4 samples. Half of the analyzed foods showed apparent presence of enterococci. All analyzed samples were free from Staphylococcus, Salmonella and Listeria spp. contamination. During microscopic confirmation of suspicious colonies Bacillus spp. were identified in 7 products. The results of our pilot study allowed to conclude that the principles of good manufacturing practice and hygienic regime were generally respected during factory processing, resulting ina relative low risk, with a clear necessity for continued control.
Kompleksowa ocena jakości mikrobiologicznej suchych karm dla psów rosnących dostępnych w Polsce. Jakość mikrobiologiczna to jedno z najistotniejszych kryteriów kontroli systemu produkcji i dystrybucji rynkowej produktów żywienia psów. Dwadzieścia dostępnych w sprzedaży produktów dla psów rosnących poddano ocenie czystości mikrobiologicznej. Analizy przeprowadzono ściśle według metodyki zgodnej z aktualnymi normami PN-ISO dotyczącymi oznaczania bakterii mezofilnych, drożdży i pleśni, przedstawicieli rodzin Enterobacteriaceae oraz Enterococcus. Ponadto w badaniu oznaczono obecność ważniejszych organizmów patogennych. Wzrost pleśni stwierdzono w pięciu przypadkach. W dwunastu produktach zaobserwowano bakterie z rodziny Enterobacteriaceae. Połowa spośród ocenianych karm okazała się pozytywna pod względem enterokoków. Wszystkie oceniane produkty były wolne od Staphylococcus, Salmonella i Listeria spp. Dla siedmiu produktów przeprowadzono obserwacje mikroskopowe podejrzanych kolonii identyfikując je jako Bacillus spp. Uzyskane w niniejszym, pilotażowym badaniu wyniki pozwalają stwierdzić, że kluczowe elementy dobrych praktyk produkcyjnych są na ogół zachowywane podobnie jak kryteria higieniczne podczas procesów technologicznych. Ze stosowaniem karm suchych wiąże się relatywnie niskie ryzyko wystąpienia u psów poważnych schorzeń o podłożu mikrobiologicznym, jednak niezbędny jest stały monitoring jakości produktów dostępnych na polskim rynku.

Źródło:

Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2017, 56[1]
1898-8830

Pojawia się w:

Annals of Warsaw University of Life Sciences - SGGW. Animal Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 76.

Tytuł:

New methods of hopping (dryhopping) and their impact on sensory properties of beer

Autorzy:

Podeszwa, T.
Harasym, J.

Powiązania:

https://bibliotekanauki.pl/articles/105602.pdf

Data publikacji:

2016

Wydawca:

Centrum Badań i Innowacji Pro-Akademia

Tematy:

hop
dry hopping
beer
bitterness
aroma
hopping
chmiel
piwo
gorycz
aromat

Opis:

Due to the significant changes on the beer market the flourishing development of small and craft breweries is clearly observed. Upgraded consumers’ expectation led to many technological challenges in brewing process resulting in novel methods of manufacturing of many different beer types. As bitterness and aroma are two crucial quality features of beer and many scientific efforts have been done especially in the area of hop aroma. Despite the predominant impact of main beer flavor compound e.g. linalool, other substances also contribute to the hoppy beer aroma through additive or synergistic effects not only raw materials used but also hopping regimes contribute as well to final flavor release though several new methods of hopping, particularly dry hopping have been developed.

Źródło:

Acta Innovations; 2016, 21; 81-88
2300-5599

Pojawia się w:

Acta Innovations

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 77.

Tytuł:

Optimization of Tribological Parameters of Pre-Positioned Wire Based Electron Beam Additive Manufactured Ti-6Al-4V Alloy

Autorzy:

Manjunath, Anandan
Anandakrishnan, V.
Ramachandra, S.
Parthiban, Kannan
Sathish, S.

Powiązania:

https://bibliotekanauki.pl/articles/2106567.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

additive manufacturing
dry sliding wear
titanium alloy
wear analysis
wear mechanisms

Opis:

The versatile application of titanium alloy in the aerospace industry and it’s hard to machine characteristics focus towards the additive manufacturing. The Ti-6Al-4V alloy is manufactured using the electron beam source with a novel method of prepositioned titanium alloy wires. The tribology of the additive manufactured titanium alloy under dry sliding condition is experimented and analysed using Taguchi technique. The targeted objective of minimum tribological responses are attained with the identified optimal parameters as load - 9.81 N, sliding velocity - 3 m/s, sliding distance - 3000 m for minimum specific wear rate and load - 9.81 N, sliding velocity - 3 m/s, sliding distance - 1000 m for minimum coefficient of friction. Among the parameters tested, load is found to be the dominant factor on the tribology of additively manufactured titanium alloy. The morphological analysis on the worn surface and debris revealed the existence of abrasion, delamination and adhesion wear mechanisms. The increase in the load dominantly showed the appearance of delamination mechanism.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 2; 447--454
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 78.

Tytuł:

Dry single-stage method of sodium tripolyphosphate production – technological and economic assessment

Autorzy:

Gorazda, K.
Kowalski, Z.
Kijkowska, R.
Pawłowska-Kozińska, D.
Wzorek, Z.
Banach, M.
Nowak, A. K.

Powiązania:

https://bibliotekanauki.pl/articles/778549.pdf

Data publikacji:

2014

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

sodium tripolyphosphate production
dry method
classic method
technical and economic analysis

Opis:

The study presents a technology of sodium tripolyphosphate (STPP) production with the use of a dry, single-stage method. The reacting substrates (concentrated wet-process phosphoric acid - WPPA and solid Na2CO3 ) are mixed with a recycled final product (STPP) in a mixer, then a „quasi-dry” mixture is calcined in a rotary kiln. Thanks to that, some stages of a classic method of STPP production are eliminated: one of the two-stage neutralization of the phosphoric acid with sodium carbonate at temperature ~80°C, filtration of the neutralised solution and its evaporation, as well as the stage of drying a solution of mono- and di-sodium orthophosphate in a spray dryer. According to the presented technical and economical analysis, the costs of STPP production using a single-stage dry method can be 10% lower compared to the classic method.

Źródło:

Polish Journal of Chemical Technology; 2014, 16, 1; 41-44
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 79.

Tytuł:

The efficiency of drip fertigation in cultivation of winter squash „Gomez” on the very light soil

Autorzy:

Rolbiecki, R.
Rolbiecki, S.
Figas, A.
Wichrowska, D.
Jagosz, B.
Ptach, W.

Powiązania:

https://bibliotekanauki.pl/articles/101275.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN

Tematy:

carotenoids
Cucurbita maxima Duch
dry matter
fruit yield
sugar
vitamin C

Opis:

The study of drip fertigation of winter squash ‘Gomez’ was conducted on the very light soil on the experimental field in Kruszyn Krajeński near Bydgoszcz in the years 2007 and 2008. The research was established as one-factorial, using the method of drawn blocks, in four replications. Drip fertigation (DF) as the liquid fertilization supplied nitrogen, potassium and phosphorus to the plants three times during growing season. As the control (DP), the drip irrigation combined with broadcast application was used. The potassium and phosphorus fertilization of control plots was applied before seed sawing. The nitrogen fertilization of control plots was provided in three single doses during vegetation. The liquid and powder fertilizations were performed at the same time. The complex fertilizer ‚Universol Blue’ (N:P:K = 18:11:18) was used. The dose of fertilizer was 3:2:3 (187.5:125:187.5 kg of NPK per ha). The irrigation was conducted using the drip line ‚T-Tape’. The liquid fertilizer was mixed by the ‚Dosatron’ dispenser. The irrigation started when the soil water pressure, measured with the tensiometers, was near - 0.04 MPa. In comparison to the control (powder fertilization), the drip fertigation (liquid fertilization) significantly increased marketable fruit yield, single fruit weight and fruit number. Most of the tested chemical components of ‘Gomez’ fruits (vitamin C, total sugar, monosaccharides, saccharose, total carotenoids and ß-carotin) were not significantly influenced by drip fertigation. However, the level of dry weight of winter squash ‘Gomez’ fruits was reduced by drip fertigation.

Źródło:

Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/2; 1201-1211
1732-5587

Pojawia się w:

Infrastruktura i Ekologia Terenów Wiejskich

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 80.

Tytuł:

Problem zaoptarzenia w wodę w regionie Islamu
The problem of water supply in the Islamic region

Autorzy:

Wilczyński, Witold J.

Powiązania:

https://bibliotekanauki.pl/articles/539956.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Geopolityczne

Tematy:

region Islamu
obszary suche i półsuche
zaopatrzenie w wodę
nawadnianie
odsalanie wody morskie
Islam region
dry and semi-dry areas
water supply
irrigation
desalination of seawater

Opis:

Region Islamu jest obejmuje większość istniejących na Ziemi obszarów suchych i półsuchych. Z tego względu woda stanowi tam surowiec deficytowy, posiadający znaczenie strategiczne. Niejednokrotnie w przeszłości i obecnie działania mające na celu zabezpieczenie odpowiednich ilości wody do celów gospodarczych i komunalnych prowadziło do konfliktów lokalnych jak i międzypaństwowych. W artykule wyjaśniono sposoby pozyskiwania wody stosowane na tym obszarze w przeszłości jak i współcześnie, zwłaszcza w krajach doświadczających eksplozji demograficznej i dużej dynamiki gospodarczej. Szczególny nacisk położono na geopolityczne znaczenie zasobów wody oraz możliwość zastosowania nowoczesnych technologii w jej pozyskiwaniu, co w uprzywilejowanej sytuacji stawia państwa dysponujące środkami finansowymi.
The Islamic region includes most of the arid and semi-arid areas existing on Earth. For this reason, water is a deficit resource there, with strategic importance. Often, in the past and now, activities aimed at securing the right amount of water for economic and communal purposes led to local and interstate conflicts. The article explains the methods of obtaining water used in this area in the past as well as today, especially in countries experiencing demographic explosion and high economic dynamics. Particular emphasis was placed on the uneven distribution of desalination installations and the geopolitical importance of water resources as well as the possibility of using modern technologies in its acquisition, which in a privileged position puts countries with financial resources at their disposal.

Źródło:

Przegląd Geopolityczny; 2019, 29; 87-101
2080-8836
2392-067X

Pojawia się w:

Przegląd Geopolityczny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 81.

Tytuł:

Effect of Dry, Vacuum, and Modified Atmosphere Ageing on Physicochemical Properties of Roe Deer Meat

Autorzy:

Kasałka-Czarna, Natalia
Biegańska-Marecik, Róża
Proch, Jędrzej
Orłowska, Aleksandra
Montowska, Magdalena

Powiązania:

https://bibliotekanauki.pl/articles/16538545.pdf

Data publikacji:

2023-05-25

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

roe deer
protein oxidation
lipid oxidation
vacuum
modified atmosphere
dry-ageing

Opis:

Consumers around the world are choosing sustainable and unprocessed foods. Roe deer meat, due to the natural origin, is a source of organic and healthy meat. The selection of suitable storage conditions and times plays an important role in a deterioration of the meat's functional and nutritional values. The knowledge about oxidation processes in roe deer meat stored and packed deploying different methods is limited. The main aim of this study was therefore to investigate the effect of storage method on the physicochemical properties of musculus longissimus thoracis et lumborum (LTL), musculus biceps femoris (BF), and musculus vastus lateralis (VL) of roe deer. The muscles were stored either dry (DRY-AGED), vacuum-packed (VAC), or packed under modified atmosphere (MAP) for 21 days. The quality of roe deer meat was assessed based on chemical composition, technological properties, pH values, water activity, colour, and oxidation processes of proteins and lipids. Roe deer meat had high protein (216.5–228.6 g/kg) and low fat content (17.1–25.8 g/kg). Both DRY-AGED and VAC contributed to improving meat tenderness during storage, while the Warner–Bratzler shear force of the MAP muscles increased. The high-oxygen conditions during MAP storage strongly induced the oxidation processes; an average increase of 1263% for thiobarbituric acid reactive substance (TBARS) level and 155% for protein carbonyl content on day 21. Vacuum packaging and dry-ageing are recommended methods for storing roe deer meat. The high oxygen atmosphere negatively affected the quality of this game species. It carries the risk of increased oxidation of proteins and lipids which may promote the formation of potentially detrimental compounds.

Źródło:

Polish Journal of Food and Nutrition Sciences; 2023, 73, 2; 175-186
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 82.

Tytuł:

A preliminary investigation of dry gravity separation with low specific gravity ores using a laboratory Knelson Concentrator

Autorzy:

Zhou, Meng
Kökkılıç, Ozan
Langlois, Raymond
Waters, Kristian E.

Powiązania:

https://bibliotekanauki.pl/articles/24085570.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

Knelson concentrator
dry gravity separation
response surface method
Box-Behnken design

Opis:

It has become an active research area for treating low specific gravity (SG) deposits by centrifugal separation due to its high efficiency, low cost and minor environmental impact. Laboratory Knelson Concentrator has shown its potential for processing high density ores on a dry basis. This study investigated the feasibility and the optimum operating conditions when processing a dry low SG feed with a modified Knelson Concentrator. A synthetic mixture of magnetite and quartz with a grade of 1% magnetite was used to mimic a low-density ratio ore. Bowl speed (G), air fluidizing pressure (psi) and solids feed rate (g/min) were chosen as the operating variables. Box-Behnken design was used to design the experiments and response surface method was used for optimization. The effects of each individual factors and their interactions on concentrate grade and magnetite recovery were evaluated. The dry process achieved up to 60 % magnetite recovery with an upgrade ratio of 5. The optimized values for the concentration with the highest recovery and grade of bowl speed, solids feed rate and air fluidizing pressure are 27 G, 200 g/min and 12 psi, respectively.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 165992
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 83.

Tytuł:

Prolongirovannye ehffekty opticheskogo izluchenija krasnogo diapazona v period prorastanija semjan
Prolonged effect of optical radiation of a red range during the germination of seeds

Autorzy:

Pankova, O.
Fesenko, A.
Bezpalko, V.
Lisichenko, N.
Golovan, L.
Romanova, T.

Powiązania:

https://bibliotekanauki.pl/articles/76435.pdf

Data publikacji:

2015

Wydawca:

Komisja Motoryzacji i Energetyki Rolnictwa

Tematy:

seed treatment
germination energy
endosperm
dynamics
dry mass
sprout
starch
monosaccharide

Źródło:

Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 7
1730-8658

Pojawia się w:

Motrol. Motoryzacja i Energetyka Rolnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 84.

Tytuł:

Effects of irrigation and planting patterns on photosynthetic capacity and grain quality of winter wheat

Autorzy:

Zhao, Y.X.
Mao, X.M.
Yong, Y.Y.
Zhou, X.B.

Powiązania:

https://bibliotekanauki.pl/articles/2082531.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

Triticum aestivum L.
chlorophyll content index
dry matter weight
farinograph parameter

Opis:

With the shortage of water resources in recent years, water has become an important factor that limits the photosynthetic capacity and grain quality of winter wheat in the North China Plain. The experiment was conducted in 2011-2014, and the design of the two-factor split-plot was adopted, with three irrigation levels (0, 90, and 180 mm) for the main plot and three planting patterns (single-single row, single-double row, doubledouble row) for the subplot. The chlorophyll content index, net photosynthetic rate, and dry matter weight of winter wheat at different growth stages were measured, and the quality parameters of the grain were also measured after the harvest. The result indicated that irrigation increased the chlorophyll content index, net photosynthetic rate, grain protein, coarse starch and whiteness, which were favourable for producing dry matter and for seed formation. The chlorophyll content index, net photosynthetic rate, dry matter weight and gluten index of double-double row were higher than those of single-single row. Therefore, the 90 mm irrigation combined with the double-double row planting pattern is a good agronomic practice for winter wheat production, and beneficial for the improvement of flour quality in the North China Plain.

Źródło:

International Agrophysics; 2019, 33, 3; 313-321
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

Soil respiration, root traits and dry matter yield of sorghum (Sorghum bicolor L.) as affected by biochar application under different cropping patterns and irrigation method

Autorzy:

Aghajani, S.D.
Alavifazel, M.
Nurmohammadi, G.
Ardakani, M.R.
Sarajughi, M.

Powiązania:

https://bibliotekanauki.pl/articles/2082944.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

biochar
root dry weight
root volume
soil respiration
Sorghum bicolor L

Opis:

This study aimed to investigate the effect of alternate furrow irrigation accompanied by biochar application within different cropping patterns on soil respiration and root traits such as root dry weight and root volume associated with the dry matter yield of sorghum (Sorghum bicolor L.) over a twoyear period (2017 – 2018). The treatments consisted of three irrigation methods, which included every furrow irrigation, fixed furrow irrigation and alternate furrow irrigation and two cropping patterns including one-row, two-rows and three levels of biochar application including 0, 6 and 12 t ha-1. Different irrigation levels had a significant effect on root morphological indices, soil respiration, and the dry matter of forage yield. Biochar application showed a significant influence on soil respiration, as the highest soil respiration was observed in the B2 and B1 treatments (0.173 and 0.171 μmol C g-1 soil h-1, respectively), in contrast, the least was observed in the control treatment B0 (0.168 μmol C g-1 soil h-1). Biochar application had a positive effect on root dry weight, root volume and dry matter yield due to the prevention of severe moisture loss and further yield loss.

Źródło:

International Agrophysics; 2020, 34, 4; 495-502
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 86.

Tytuł:

Changes in the Blood Pressure, Heart Rate and Body Mass of Physically Active Men in Response to Thermal Stress

Autorzy:

Podstawski, Robert
Bielec, Grzegorz
Borysławski, Krzysztof
Alföldi, Zoltán
Marzec, Arkadiusz

Powiązania:

https://bibliotekanauki.pl/articles/2026889.pdf

Data publikacji:

2022-03-31

Wydawca:

Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego

Tematy:

dry sauna
blood pressure
heart rate
body mass loss
physical activity

Opis:

Background: Finnish sauna is presently the most popular type of thermal therapy in Europe. Saunas are widely available in aquaparks, SPA centers and hotels. In Scandinavian countries sauna is regarded not only as a form of treatment, but as a part of the national lifestyle. Objective: The aim of this study was to evaluate sauna-induced changes in systolic (SBP) and diastolic blood pressure (DBP), heart rate (HR) and body mass in healthy men. Methods: Thirty healthy men aged 20-49 years (mean age: 31.2±11.3 years) attended four 12-minute Finnish sauna sessions (temperature: 90°C, humidity: 14-16%) with 6-minute breaks in between sessions, including cold water immersion for 1 minute. The participants’ physical activity (PA) levels were evaluated with an IPAQ questionnaire. Sauna bathers’ body composition, BP and HR were measured before the first and after the fourth sauna session. Results: A significant (p < .001) decrease in SBP and DBP values was noted in response to sauna regardless of the bathers’ body mass, age and PA levels. The average HR increased significantly in younger, slimmer and more physically active participants. Sauna treatment induced a significant decrease in body mass loss regardless of all independent variables. Conclusions: Repeated 12-minute Finnish sauna sessions have a beneficial influence on the cardiovascular system. Finnish sauna can be recommended for healthy men with average and high PA levels as a means of decreasing BP. Body mass loss, on the other hand, is related to the loss of body fluids as a result of sweating.

Źródło:

Central European Journal of Sport Sciences and Medicine; 2022, 37; 65-76
2300-9705
2353-2807

Pojawia się w:

Central European Journal of Sport Sciences and Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 87.

Tytuł:

The study of cutting forces and their amplitudes during high-speed dry milling magnesium alloys

Autorzy:

Zagórski, I.
Kuczmaszewski, J.

Powiązania:

https://bibliotekanauki.pl/articles/102160.pdf

Data publikacji:

2013

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

high-speed dry milling
magnesium alloys
aviation elements
machinability
cutting forces

Opis:

This paper presents the state of knowledge on cutting forces values during milling of different magnesium alloy types. Additionally, the results of own research on cutting forces and their amplitudes after milling magnesium alloys used for manufacturing elements applied in the aerospace industry are included. The subject of the analysis was the influence of technological parameters and the tool type on cutting forces and their amplitudes. The analysis is important due to the correlation between cutting forces and temperature in the cutting area, and, consequently, the safety of machining and strain of the workpiece.

Źródło:

Advances in Science and Technology. Research Journal; 2013, 7, 20; 61-66
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 88.

Tytuł:

Impact of compressed air pressure on geometric structure of AISI 1045 steel surface after turning with the use of MQCL method

Autorzy:

Maruda, R. W.

Powiązania:

https://bibliotekanauki.pl/articles/102690.pdf

Data publikacji:

2016

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

compressed air pressure
emulsion flow
geometric structure
MQCL
near-dry cutting

Opis:

MQL (Minimum Quantity Lubrication) and MQCL (Minimum Quantity Cooling Lubrication) methods become alternative solutions for dry machining and deluge cooling conditions. Due to a growing interest in MQCL method, this article discusses the impact of compressed air pressure, which is one of the basic parameters of generating emulsion mist used in MQCL method, on the geometric structure of the surface after turning AISI 1045 carbon steel. This paper presents the results of measurements of machined surface roughness parameters Ra, Rz, RSm as well as roughness profiles and Abbot-Firestone curves. It was found that the increase in the compressed air pressure from 1 to 7 MPa causes an increase in the roughness of the machined surface (the lowest values were obtained at a pressure of 1 MPa). An increase of emulsion mass flow rate also causes an increase in the value of selected parameters of roughness of the machined surface.

Źródło:

Advances in Science and Technology. Research Journal; 2016, 10, 30; 159-163
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 89.

Tytuł:

Wpływ antykoncepcji hormonalnej na film łzowy

Autorzy:

Janeczek, Martyna

Powiązania:

https://bibliotekanauki.pl/articles/132606.pdf

Data publikacji:

2019

Wydawca:

M2 Media

Tematy:

antykoncepcja
zaburzenia
zespół suchego oka
OSDI
contraception
disorders
dry eye syndrome

Opis:

Powierzchnia oka pokryta jest cienką warstwą filmu łzowego i pełni ważne funkcje dla narządu wzroku. Aby film łzowy spełniał swoje zadania, musi być zachowana równowaga między jego składowymi. Niedobór lub nadmiar którejś ze składowych skutkuje zaburzeniami filmu łzowego, a w konsekwencji zespołem suchego oka. Przyczynić się do tego może kilka czynników, m.in. stosowanie antykoncepcji hormonalnej, która dostarcza do organizmu kobiety dawki estrogenów i progesteronu. Te wpływają bezpośrednio na gruczoły odpowiadające za produkcję filmu łzowego, ale również działają antagonistycznie w stosunku do androgenu, którego receptory znajdują się w gruczołach. Może to zaburzyć funkcjonowanie gruczołów i skutkować obniżeniem parametrów filmu łzowego oraz pojawieniem się zespołu suchego oka. W celu sprawdzenia, czy antykoncepcja hormonalna wpływa na film łzowy, przebadano dwie grupy kobiet: niestosujące antykoncepcji hormonalnej i przyjmujące ją co najmniej trzy miesiące. Obie grupy zostały poddane ocenie subiektywnej w postaci kwestionariusza OSDI, a następnie badaniom obiektywnym sprawdzającym ilość filmu łzowego, jego stabilność i stan powierzchni oka. Badania obiektywne potwierdziły założenia: zbadane parametry u kobiet stosujących antykoncepcję hormonalną były obniżone w stosunku do grupy kontrolnej i większość z nich była poniżej normy, co może świadczyć o częstszym występowaniu zespołu suchego oka. Ankieta OSDI nie wykazała różnic w subiektywnym odczuwaniu objawów między grupami.
The surface of the eye is covered with a thin layer of tear film which has important functions. The balance between its components must be maintained. Deficiency or excess of any of the components results in disorders of the tear film and consequently dry eye syndrome. Several factors may contribute to this, including hormonal contraception, which provides the body with estrogen and progesterone. These affect the glands responsible for tear film production, but also act antagonistically to the androgen whose receptors are in those glands. This may disrupt the functioning of the glands and result in a reduction in tear film parameters and dry eye syndrome. To check whether hormonal contraception affects the tear film, two groups of women were examined: those not using hormonal contraception and those taking it for at least three months. The subjective test was OSDI questionnaire. Objective tests checked the amount of tear film, its stability and the condition. Objective studies confirmed that the tested parameters in women using hormonal contraception turned out to be lower and most of them were below normal, which may cause dry eye syndrome. The OSDI survey did not show differences in the subjective perception of symptoms between groups.

Źródło:

Optyka; 2019, 5; 40-43
2081-1268

Pojawia się w:

Optyka

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 90.

Tytuł:

Infrastructure development of international importance for the modern transport system

Autorzy:

Lakhmetkina, Natalia
Poliak, Milos
Oleinikov, Alexander

Powiązania:

https://bibliotekanauki.pl/articles/263611.pdf

Data publikacji:

2019

Wydawca:

Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji

Tematy:

transport infrastructure
transport corridor
cross-border infrastructure
"Dry port"
Smart logistics

Opis:

High - quality transport infrastructure is one of the key elements of the modern economy. At present, in the context of growing transportations volume, the development of transport infrastructure is of particular importance for all countries. The role of dry ports in constructing cross-border logistics networks attracts more attention to the countries governments. This article discusses the concept of "dry port" as an element of transport and logistics infrastructure for the modern transport system, and the prospects for the development of such facilities in international significance. The paper focused on the modern transportation network, which connects the inland cross-border logistics network through dry ports through concept of smart logistics at the macro level on the scale of continental cooperation in Eurasia. The main goal of this article is to develop a methodology for the formation of integrated infrastructure management of international importance in the concept of "Dry port" and "Smart logistics", taking into account the peculiarities of the use of transport and cross-border infrastructure of countries for the formation of new transport solutions in the East-West-East corridors.

Źródło:

Archiwum Motoryzacji; 2019, 84, 2; 103-116
1234-754X
2084-476X

Pojawia się w:

Archiwum Motoryzacji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 91.

Tytuł:

Mechanical behavior of soil-steel structure subjected to live loads and different water conditions

Autorzy:

Łydżba, D.
Różański, A.
Sobótka, M.
Stefaniuk, D.
Chudy, G.
Wróblewski, T.

Powiązania:

https://bibliotekanauki.pl/articles/383504.pdf

Data publikacji:

2017

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

soil-steel structure
soil-steel bridge
bridge
dry anti-flood reservoir

Opis:

The paper describes the analysis of a three-span soil-steel bridge along the road section crossing a dry anti-flood reservoir. The structure can be occasionally filled with water. The authors investigate internal forces and stresses in the shells due to live loads at different water conditions. Finite element simulations are carried out assuming elastic-plastic behavior of soil, elastic shell and nonlinear (frictional) contact zone. The analysis takes into account soil load history. In particular, the construction and operation of the bridge under quasi-static live loads is considered. The construction stage includes laying and compaction of the backfill. Then, the bridge in operation is investigated at three different water conditions: normal use (dry reservoir), maximum water level (flood) and lowering of the water level in the reservoir. The results show that during the flood the maximum stress in the shell significantly increases. Moreover, some of non-linear effects, typical in such structures, e.g. hysteretic effect, become more evident in comparison to normal use of the bridge.

Źródło:

Archiwum Instytutu Inżynierii Lądowej; 2017, 23; 163-174
1897-4007

Pojawia się w:

Archiwum Instytutu Inżynierii Lądowej

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 92.

Tytuł:

Geological and drilling aspects of construction and exploitation geothermal systems HDR/EGS

Autorzy:

Sapińska-Śliwa, A.
Kowalski, T.
Knez, D.
Śliwa, T.
Gonet, A.
Bieda, A

Powiązania:

https://bibliotekanauki.pl/articles/298836.pdf

Data publikacji:

2015

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

hot dry rocks
geothermal energy
fracturing of rocks
enhanced geothermal systems

Opis:

The article presents an overview of developing unconventional geothermal systems, such as Hot Dry Rock Systems (HDR), where is used the heat of dry rock and enhanced system with smali water tributary called Enhanced Geothermal Systems (EGS). These systems provide utilization of geothermal energy in reservoirs (i.a. granites) where conventional methods are not possible to use. Operation HDR/EGS involves the use rock heating through warming medium, which flowing between the production and injection boreholes. In most cases medium introduced artifically by hydraulic fracturing. Currently, most of the projects HDR/EGS is in the implementation phase. Based on gathered materials an analysis of the construction and exploitation geothermal systems. Take into account geological and drilling aspects.

Źródło:

AGH Drilling, Oil, Gas; 2015, 32, 1; 49-63
2299-4157
2300-7052

Pojawia się w:

AGH Drilling, Oil, Gas

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 93.

Tytuł:

Flood retention capabilities in a mountain catchments: case study of the commune of Spytkowice

Autorzy:

Kuras, K.
Jarosinska, E.

Powiązania:

https://bibliotekanauki.pl/articles/60624.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN

Tematy:

flood retention
capability
dry reservoir
mountain catchment
Spytkowice commune
flood hazard

Opis:

The experience of flooding from 2010 in the Commune of Spytkowice showed a dire need to define the factors behind the floods repeating every year in the region and to propose the best solutions for eliminating or limiting damage in the risk area. On account of the catchment’s location in mountainous area, the main intention was to propose actions that would mainly increase the catchment retention capacity in the upper reach of the Skawa river and its tributary, Pożoga. By slowing down the flow, these actions may considerably contribute to the protection of the most flood-sensitive areas located in the lower part of the catchment. Two solutions have been proposed based on the idea of building dry water reservoirs and providing the possibility to resettle inhabitants from the flooded area. The choice of the best solution for the Commune of Spytkowice depends on the topography of the valleys of rivers Skawa and Pożoga, as well as the financial situation concerning the project.

Źródło:

Infrastruktura i Ekologia Terenów Wiejskich; 2014, IV/3
1732-5587

Pojawia się w:

Infrastruktura i Ekologia Terenów Wiejskich

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 94.

Tytuł:

Synthesis of nano-structured duplex and ferritic stainless steel powders by dry milling and its comparison with wet milling

Autorzy:

Shashanka, R.
Uzun, Orhan
Chaira, D.

Powiązania:

https://bibliotekanauki.pl/articles/356573.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

powder metallurgy
dry milling
wet milling
planetary milling
stainless steel
sintering

Opis:

In the present paper, elemental Fe, Cr and Ni powders were used to fabricate nano-structured duplex and ferritic stainless steel powders by using high energy planetary ball milling. We have studied the effect of milling atmosphere like wet (toluene) and dry (argon) milling of elemental Fe-18Cr-13Ni (duplex) and Fe-17Cr-1Ni (ferritic) powders for 10 h in a dual drive planetary mill. Stearic acid of 1wt.% was added during milling to avoid agglomeration. The dry and wet milled duplex and ferritic stainless steel powders were characterized by XRD, SEM and particle size analysis techniques. We have found that both the milling atmospheres have great influence in controlling the final particle morphology, size and phase evolution during milling. It was reported that dry milling is more effective in reducing particle size than the wet milling. The Nelson-Riley method of extrapolation was used to calculate the precise lattice parameter and Williamson-Hall method was used to calculate the crystallite size and lattice strain of both the stainless steel milled in argon atmosphere. Dry milled duplex and ferritic stainless steel were then consolidated by conventional sintering method at 1100, 1200 and 1300°C temperatures under argon atmosphere for 1 hour.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 1; 5-14
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 95.

Tytuł:

Experimental Investigations of Tool Wear in Vibration-Assisted Turning of Inconel 718

Autorzy:

Dodla, Srihari

Powiązania:

https://bibliotekanauki.pl/articles/2125542.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Inconel 718
ultrasonic assisted turning
dry machining
deviation
cutting forces
temperature

Opis:

In the current paper, the effect of tool wear for a constant period of time (360 s) during conventional and ultrasonic assisted machining of Inconel 718 is investigated in terms of cutting forces, temperature, and deviation measurements. For fixed process parameters turning experiments have been performed with and without the application of tangential vibration. Ultrasonic assisted turning (UAT) experiments have been compared with conventional turning (CT). The experimental results reveal that cutting forces and temperature increase linearly in the case of UAT whereas remaining constant in CT for a constant period of time. Besides the tool wear rate in the case of UAT is more than that in the CT.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 3; 949--953
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 96.

Tytuł:

Sravnenije koehfficientov trenija skol'zhenija semjan i zhmykha l'na po poverkhnostjakh razlichnykh materiallov
Comparison of the sliding friction coefficient of linseed of oil varieties and linseed oil cake over the surface of different metals

Autorzy:

Kuzminskijj, R.
Sokolovskijj, O.
Vasilkevych, V.
Sheremeta, R.

Powiązania:

https://bibliotekanauki.pl/articles/77520.pdf

Data publikacji:

2015

Wydawca:

Komisja Motoryzacji i Energetyki Rolnictwa

Tematy:

sliding friction
linseed oil
flax seed
dry friction
friction coefficient
metal surface

Źródło:

Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 4
1730-8658

Pojawia się w:

Motrol. Motoryzacja i Energetyka Rolnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 97.

Tytuł:

Predicting the shipping market by spreads of timecharter rates

Autorzy:

Yip, T. L.

Powiązania:

https://bibliotekanauki.pl/articles/134964.pdf

Data publikacji:

2018

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

timecharter rates
shipping market
Panamax dry bulk ships
economic indicator
maritime transport

Opis:

This paper has explored the predictability of spreads between long-term and short-term timecharter rates on spot freight rates. The spread between long-term and short-term rates (or the slope of the yield curve) is often used as a leading economic indicator of economic activities. This concept has been extended to the shipping market in this paper and the probability that the spot freight rate will increase or decrease has been determined. Using the spread between the timecharter rates on long-term and short-term charter contracts, the direction of spot freight rates has been predicted with the dynamic probit model, which is used to estimate the probability of discrete events. Evidence has been drawn from Panamax dry bulk ships for future weekly, quarterly and biyearly changes of spot freight rates. While the dynamic probit model has shown moderate predictive power, the weekly model has shown that the market has a relatively longer memory than the quarterly and biyearly models.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 53 (125); 9-16
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 98.

Tytuł:

Flood protection on the Odra river in the segment between Nowa Sól and Cigacice
Zabezpieczenie przeciwpowodziowe Odry na odcinku Nowa Sól-Cigacice

Autorzy:

Hudak, M.
Karczmar, C.
Kołodziejczyk, U.
Kostecki, J.

Powiązania:

https://bibliotekanauki.pl/articles/396320.pdf

Data publikacji:

2018

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

flood protection
dry polder
flood polders
ochrona przeciwpowodziowa
suche poldery
poldery zalewowe

Opis:

Existing river valley development methods which have been used for a significant period of time, as well as the use of land for construction of residential developments, have led to negative consequences for the environment. The agricultural use of land and its protection with hydraulic structures has restricted the natural flood area of the river. According to EU law, the risk of catastrophic flooding should be reduced, and its effects minimized. Sustainable water management determines the effectiveness of flood protection in the whole river basin. The paper presents the flood protection on the Odra River in the segment between Nowa Sól and Cigacice, with special emphasis on the possibility of reconstructing the former flood polders in the Middle Odra Region that existed before the year 1945, including the polder in Milsko.
Stosowane od wieków sposoby zagospodarowania dolin rzecznych oraz wykorzystanie obszaru pod budownictwo mieszkalne doprowadziło do negatywnych konsekwencji dla środowiska. Przeznaczenie terenów pod rolnictwo oraz zabezpieczanie ich przed powodzią budowlami hydrotechnicznymi ograniczyło naturalny rozlew rzeki. Według prawa należy zmniejszyć ryzyko wystąpienia katastrofalnej powodzi oraz zminimalizować jej skutki. Spójna gospodarka wodna warunkuje skuteczność ochrony przeciwpowodziowej w całym dorzeczu. Rozwiązaniem tego problemu może być odtworzenie dawnych polderów zalewowych funkcjonujących na Środkowym Nadodrzu przed 1945 r., w tym polderu Milsko.

Źródło:

Civil and Environmental Engineering Reports; 2018, No. 28(1); 54-63
2080-5187
2450-8594

Pojawia się w:

Civil and Environmental Engineering Reports

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 99.

Tytuł:

Analysis of the producibility of mineral fertilizers from industrial waste
Analiza możliwości wytwarzania nawozów mineralnych z odpadów przemysłowych

Autorzy:

Hryniewicz, M.
Bembenek, M.

Powiązania:

https://bibliotekanauki.pl/articles/335090.pdf

Data publikacji:

2017

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych

Tematy:

industrial waste
dry granulation
mineral fertilizers
odpady przemysłowe
granulacja dwustopniowa
nawozy mineralne

Opis:

Most industrial waste in the form of sludge materials or dusts characterised by a high content of potassium, phosphorus, calcium or sulphur can, upon proper pretreatment, become complete fertilizers for agriculture, vegetable farming or forestry. The Department of Manufacturing Systems of AGH carried out research tests on the dry granulation of selected waste. The first group of materials included post-filtration sludge materials from the chemical industry which contained significant amounts of magnesium and potassium compounds and did not contain harmful substances and heavy metals. The other waste was the FGD gypsum which is calcium sulphate dihydrate. The third material which underwent initial granulation tests consisted of ash which was a biomass combustion side product containing mainly calcium oxide and silica. The article shows test research results which prove that is possible to produce proper granules from selected waste.
Część odpadów przemysłowych w postaci szlamów lub pyłów, charakteryzujących się dużą zawartością potasu, fosforu, wapnia lub siarki, po odpowiednim przygotowaniu może stanowić pełnowartościowe nawozy dla rolnictwa, ogrodnictwa lub leśnictwa. W Katedrze Systemów Wytwarzania AGH przeprowadzono badania dwustopniowej granulacji wybranych odpadów. Pierwszą badaną grupą materiałów były szlamy pofiltracyjne z przemysłu chemicznego charakteryzujące się tym, że posiadają znaczne ilości związków magnezu oraz potasu i nie zawierają szkodliwych substancji i metali ciężkich. Drugą grupą odpadów był gips IOS stanowiący dwuwodny siarczan wapnia. Trzecim materiałem, który poddano wstępnym próbom granulowania był uboczny produkt spalania biomasy, jakim jest popiół zawierający przede wszystkim tlenek wapnia i krzemionkę. W artykule przedstawiono wyniki badań, które dowodzą możliwości wytwarzania odpowiedniego granulatu z wytypowanych odpadów.

Źródło:

Journal of Research and Applications in Agricultural Engineering; 2017, 62, 1; 43-47
1642-686X
2719-423X

Pojawia się w:

Journal of Research and Applications in Agricultural Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 100.

Tytuł:

Dry Coal Cleaning Technology
Technologia suchego wzbogacania węgla

Autorzy:

Baic, I.
Blaschke, W.
Szafarczyk, J.

Powiązania:

https://bibliotekanauki.pl/articles/319115.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

dry coal cleaning
air concentrating tables
suche wzbogacanie węgla
powietrzny stół koncentracyjny

Opis:

The Instiute of Mechanised Construction and Rock Mininig - Warsaw, Poland - bought in China a concentracting table for dry cleaning of the type FGX-1. The unit has been tested mechanically since mid – November 2012. Preliminary research of coal dry cleaning has been conducted. These tests were designed to measure the impact of technical and technological parameters on the accuracy of the separation process of the coal from waste rock grains. This paper describes the principles of enrichment, the construction of air concentrating tables, and some of the parameters affecting the accuracy of separation of grains with different densities. It presents the results of dry coal cleaning experiments. The summary indicates the potential of air concentrating tables and highlights their strengths and weaknesses.
Intytut Mechanizacji Budownictwa i Górnictwa Skalnego - Warszawa, Polska - kupił w Chinach stół koncentracyjny do wzbogacania węgla na sucho, typu FGX-1. Urządzenie zostało przetestowane mechanicznie od połowy - listopada 2012. Wstępne badania suchego wzbogacania wegla zostały przeprowadzone w ZG Sobieski. Badania miały na celu zbadanie wpływu parametrów technicznych i technologicznych na dokładność procesu separacji węgla od ziarn odpadów. W artykule opisano zasadę wzbogacania, budowę stołu koncentracyjnego powietrznego, okreslono parametry wpływających na dokładność rozdziału ziaren o różnych gęstościach. Przedstawiono wyniki wzbogacania na sucho węgla. W podsumowaniu wskazano potencjał powietrznej koncentracji wegla, okreslono mocne i słabe strony technologii.

Źródło:

Inżynieria Mineralna; 2014, R. 15, nr 2, 2; 257-262
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

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