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Tytuł:
One-sludge denitri-nitrification system application in reconstruction of biological treatment plants in Russian Federation
Autorzy:
Gogina, E. S.
Powiązania:
https://bibliotekanauki.pl/articles/402849.pdf
Data publikacji:
2016
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
wastewater
facilities
reconstruction
biological treatment
nitrogen
biogenic elements
ścieki
udogodnienie
rekonstrukcja
oczyszczanie biologiczne
azot
pierwiastki biogenne
Opis:
The paper presents the main problems and their solutions in the reconstruction of treatment facilities in the Russian Federation. The results of research aimed the use of the stable system, which is based on nitrification activated sludge appliance, when the sludge contains bacteria-heterotrophic-nitrificators, are shown. The working process after the reconstruction was high effective (about 98% organic compounds removing, and about 99% ammonium nitrogen removing). Analysis of the treatment facilities after reconstruction proves theoretical assumptions about the system. These data confirm the stability of the developed technological schemes and give reasons to recommend it for further implementation of the reconstruction of treatment facilities
Źródło:
Budownictwo i Inżynieria Środowiska; 2016, 7, 1; 29-32
2081-3279
Pojawia się w:
Budownictwo i Inżynieria Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Management of disused lead-acid batteries in the context of the eco-balance analysis
Autorzy:
Kamińska, E. S.
Powiązania:
https://bibliotekanauki.pl/articles/245323.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
recycling
Life Cycle Assessment
environmental protection
lead-acid batteries
eco-balance
recykling
szacowanie cyklu życia
ochrona środowiska
akumulatory ołowiowo-kwasowe
ekobilans
Opis:
The article describes the results of the eco-balance analysis of the disused lead-acid batteries recycling technology. The analysis will be made using the life cycle assessment (LCA) method. The analysis was developed using the SimaPro7.3.3. software. The life cycle assessment (LCA) was made using Ecological Scarcity and IMPACT2002 + methods. The results are shown as environmental points [Pt], which reflect the potential level of environmental burdens exerted by the analysed object. The results are presented in the environmental categories, which are grouped in the impact categories. For the Ecological Scarcity method, these are emission into air, water, soil, energy, and natural resources and deposited waste. For the IMPACT2002 + method: human health, climate changes, ecosystem quality and resources consumption. The boundaries of the system under investigation include the processes of mechanical battery scrap processing, desulfurization and crystallization processes (PI), the melting processes to obtain crude lead and refining processes (PII and PIII). As the functional unit, there was accepted 1 Mg of the processed battery scrap. Particular attention was paid to the airborne emission, which adversely affect human health and climate change. The technology for which the tests were conducted offers the possibility to recover other elements, for example, secondary lead, polypropylene and sulfuric acid as crystalline sodium sulphate.
Źródło:
Journal of KONES; 2018, 25, 1; 197-203
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effects of anti-mitotic agents on dihaploidization and fertility in winter squash (Cucurbita maxima Duch.) and pumpkin (Cucurbita moschata Duch.) androgenic haploids
Autorzy:
Kurtar, E.S.
Powiązania:
https://bibliotekanauki.pl/articles/12195161.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
Double-haploidization (DH) is one of the favorable techniques to obtain 100% pure double haploid plants (DH’s) for generating the new F1 cultivars in a short time. The fecundity of this technique depends on the high quantity of haploids and also fertile DH’s. However, there are no comprehensive reports on the chromosome doubling and fertility (fruit and seed-set) of winter squash and pumpkin haploids, currently. Thus, to obtain high frequency and fertile DH’s, the efficiency of different anti-mitotic agents (colchicine, amiprophos methyl, trifluralin and oryzalin) was tested at various concentrations and exposure times for both in vitro and in vivo conditions. Haploid plantlets recovered from anther cultures of winter squash and pumpkin lines were used for DH program. The haploid plants were wholly immersed in aqueous solutions of antimitotic agents in vitro and apical parts of haploid plantlets were treated with anti-mitotic agents three times in vivo. Since some plants remained haploid, and the highest DH efficiency was obtained from multiple treatments of colchicine to shoot tips of haploid plants in the rate of 93.3%. In vivo multiple treatments of 1% colchicine for an hour was found to be the best doubling procedure for the recovery of high-frequency fertile DH’s in our winter squash and pumpkin breeding program.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 5; 3-14
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of secondary metalworking processes on susceptibility of aircraft to catastrophic failures and prevention methods
Analiza wpływu procesów wtórnego kształtowania materiałów na skłonność samolotów do uszkodzeń katastroficznych oraz na dobór metod zapobiegania tym uszkodzeniom
Autorzy:
Dzidowski, E. S.
Powiązania:
https://bibliotekanauki.pl/articles/353492.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aircraft
materials
cracking
prevention
workability optimization
samolot
materiały
pękanie
zapobieganie
optymalizacja obróbki
Opis:
The causes of plane crashes, stemming from the subcritical growth of fatigue cracks, are examined. It is found that the crashes occurred mainly because of the negligence of the defects arising in the course of secondary metalworking processes. It is shown that it is possible to prevent such damage, i.e. voids, wedge cracks, grain boundary cracks, adiabatic shear bands and flow localization, through the use of processing maps indicating the ranges in which the above defects arise and the ranges in which safe deformation mechanisms, such as deformation in dynamic recrystallization conditions, superplasticity, globularization and dynamic recovery, occur. Thanks to the use of such maps the processes can be optimized by selecting proper deformation rates and forming temperatures.
Dokonano analizy przyczyn katastrof lotniczych wskutek podkrytycznego rozwoju pęknięć zmęczeniowych. Stwierdzono, że do katastrof tych dochodziło głównie z powodu nieuwzględniania uszkodzeń powstających podczas wtórnego kształtowania materiałów. Wykazano, że istnieje możliwość eliminowania takich uszkodzeń, to jest powstawania: pustek, pęknięć klinowych, pęknięć między krystalicznych oraz adiabatycznych pasm ścinania i lokalizacji odkształceń. Wymaga to jednak stosowania map procesów kształtowania, określających zakresy występowania w/w uszkodzeń oraz zakresy występowania bezpiecznych mechanizmów odkształceń, do jakich należy odkształcanie w warunkach rekrystalizacji dynamicznej, superplastyczności. globularyzacji i zdrowienia dynamicznego. Stosowanie takich map umożliwia optymalizację procesów poprzez dobór odpowiedniej prędkości odkształceń i temperatury kształtowania.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 4; 1207-1212
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Doświadczalnictwo i rekomendacja odmian - teraz i w przyszłości
Experimentation and recommendation of plant varieties - new and in the future
Autorzy:
Gacek, E.S.
Powiązania:
https://bibliotekanauki.pl/articles/795240.pdf
Data publikacji:
2002
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 2002, 488, 1
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A stronger bridge theorem
Autorzy:
Thomas, E. S.
Powiązania:
https://bibliotekanauki.pl/articles/726352.pdf
Data publikacji:
1964
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Colloquium Mathematicum; 1964, 13, 2; 209-210
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
REVIEW OF Laura Mori (ed.), Observing Eurolects: Corpus analysis of linguistic variation in EU law.
RECENZJA KSIĄŻKI Observing Eurolects: Corpus analysis of linguistic variation in EU law, red. Laura Mori
Autorzy:
MATTILA, Heikki E. S.
Powiązania:
https://bibliotekanauki.pl/articles/921275.pdf
Data publikacji:
2019-11-28
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Źródło:
Comparative Legilinguistics; 2019, 38, 1; 83-94
2080-5926
2391-4491
Pojawia się w:
Comparative Legilinguistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Occulted Woman in Russian Silver Age Decadent Poetry
Autorzy:
Forrester, Sibelan E.S.
Powiązania:
https://bibliotekanauki.pl/articles/635600.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Russian Silver Age poetry
Women poets
decadent
feminist
gender
literary scholarship
Opis:
The article outlines the cultural context of Russian women who contributed to the development of decadent poetry in the late 19th and early 20th centuries, most now forgotten or “occulted” (eclipsed, crowded out). Given the importance of gender theories and “feminine” discursive space in the Silver Age, this phenomenon must be examined; it is not just a typical example of women written out of literary history. The article suggests reasons why decadence may have appealed to women as well as why Russian women who adopted a specifically decadent position might not have been taken seriously. It ends by suggesting why more famous Russian poets (especially Axmatova and Cvetaeva, whose reputations have lasted and grown) achieved more lasting influence thanks to their occulted female predecessors.
Źródło:
Poznańskie Studia Slawistyczne; 2016, 11; 97-111
2084-3011
Pojawia się w:
Poznańskie Studia Slawistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
LA CRITIQUE DU LIVRE DE JEAN-CLAUDE GÉMAR ET VO HO-THUY INTITULÉ : « NOUVELLES DIFFICULTÉS DU LANGAGE DU DROIT AU CANADA. DITS ET MAUX DE THÉMIS »
RECENZJA KSIĄŻKI PT: „NOUVELLES DIFFICULTÉS DU LANGAGE DU DROIT AU CANADA. DITS ET MAUX DE THÉMIS” AUTORSTWA JEAN-CLAUDE'A GÉMARA I VO HO-THUY'A
REVIEW OF THE BOOK ENTITLED NOUVELLES DIFFICULTÉS DU LANGAGE DU DROIT AU CANADA. DITS ET MAUX DE THÉMIS” WRITTEN BY JEAN-CLAUDE GÉMAR ET VO HO-THUY
Autorzy:
MATTILA, Heikki E.S.
Powiązania:
https://bibliotekanauki.pl/articles/920745.pdf
Data publikacji:
2017-10-29
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Źródło:
Comparative Legilinguistics; 2017, 30, 1; 127-134
2080-5926
2391-4491
Pojawia się w:
Comparative Legilinguistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Galerkin method for bending analysis of beams on non-homogeneous foundation
Autorzy:
Musa, A., E., S.
Powiązania:
https://bibliotekanauki.pl/articles/122566.pdf
Data publikacji:
2017
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
Galerkin method
non-homogenous foundation
analysis of beams
beam on elastic foundation
metoda Galerkina
fundament niejednorodny
zginanie belek
Opis:
In this study, a mathematical formulation for static bending analysis of a beam on a non-homogenous foundation is presented. The proposed method offers an accurate procedure for analysis and design of a beam resting on a varying soil bed. The Winkler foundation model is used and presented using discontinuous functions to account for the sudden change in the soil stiffness coefficient. The solution of the governing differential equation is then obtained using the Galerkin method with the help of approximation functions that satisfy the boundary conditions. A systematic approach for setting the approximation functions for different support and soil conditions is suggested. The accuracy of the proposed method is verified through two numerical examples, and they showed an excellent agreement with the finite element method (FEM) and available literature results.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2017, 16, 3; 61-72
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mycorrhizal inoculation and phosphorus fertilizers to improve onion productivity in saline soil .
Autorzy:
Ramadan, M.E.- S.
Powiązania:
https://bibliotekanauki.pl/articles/12636232.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
plant cultivation
onion
mycorrhizal inoculation
phosphorus fertilizer
saline soil
vegetable production
Opis:
This study investigated arbuscular mycorrhizal fungi (AMF) inoculation and phosphorus fertilizer on growth, productivity and quality of onion grown under saline soil conditions. The experiment was conducted in the Experimental Farm of Desert Research Center, Ras Sudr, South Sinai Governorate, Egypt. Egyptian local onion cultivar ‘Giza 20’ was selected. Treatments were: two arbuscular mycorrhizal fungi (AMF) inoculation treatments [without inoculation (–AMF) and with mycorrhizal inoculation (+AMF)] and four phosphorus supplied treatments (0, 48, 96 and 144 kg P2O5 ha-1). Mycorrhizal inoculation and phosphorus addition affected the plant growth, bulb yield and quality. Morphological traits of plant (height, leaf number, fresh and dry weight), neck diameter, bulb characters (diameter and weight), total soluble sugars (TSS), protein, P content increased, while proline content decreased due to the inoculation of AMF and phosphorus application. Onion inoculated by AMF combined with 96 or 144 kg P2O5 ha-1 gave the highest productivity under saline conditions.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 1; 57-66
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Melanophores inside frogs
Autorzy:
Pshennikova, E.S.
Voronina, A.S.
Powiązania:
https://bibliotekanauki.pl/articles/10853.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2018, 71
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Meteorological and agricultural effects on airborne Alternaria and Cladosporium spores and clinical aspects in Valladolid [Spain]
Autorzy:
Reyes, E S
de la Cruz, D.R.
Merino, E.S.
Sanchez, J.S.
Powiązania:
https://bibliotekanauki.pl/articles/51010.pdf
Data publikacji:
2009
Wydawca:
Instytut Medycyny Wsi
Tematy:
Alternaria
Cladosporium
spore
meteorological effect
agricultural effect
maximum concentration
temperature
skin test reaction
clinical aspect
Spain
allergy
human disease
Źródło:
Annals of Agricultural and Environmental Medicine; 2009, 16, 1; 53-61
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Somebody else’s problem? usability in ship bridge design seen from the perspective of different maritime actors
Autorzy:
Danielsen, B. E.
Petersen, E. S.
Powiązania:
https://bibliotekanauki.pl/articles/24201377.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
navigational bridge equipment
ship bridge design
navigational bridge
SOLAS convention
navigational equipment
bridge equipment
maritime actors
different maritime actors
Opis:
Navigation is a complex interaction between human, organizational, environmental, and technological factors on the ship’s bridge. Today, ships bridges include a broad suite of equipment with both digital and analogue interfaces, covering a range of functions and purposes. Suboptimal usability in equipment and interface design as well as layout of the ships bridge has been reported by researchers for decades. This paper aims to contribute to our understanding of why there has been limited progression in usability in ship bridge design over the last decades, by investigating the stakeholders’ different perspectives of their influence, interest and responsibility for usability in ship bridge design. The study is based on interviews with seafarers, shipowners, equipment manufacturers, shipyard, insurance companies, classification societies and a flag state. Usability in navigational equipment and systems on a ship’s bridge is required by the International Maritime Organization (IMO) SOLAS Regulation V/15. We find that this goal-based requirement is challenging to follow up both in design, development, and survey work. To achieve usability in maritime equipment and bridge systems ideally requires the actively involvement of end-users throughout the design and development process. We find that the seafarers, the direct end-users, do not have a clear voice in the ship bridge and bridge equipment design and the associated purchasing processes. The other stakeholders appear to recognize the existing shortcomings, and some do show interest in improvements, but the responsibility for usability seem to be fragmented, and they see the potential solutions as being somebody else’s problem. We conclude by suggesting both long-term and a short-term way forward for improving usability in ship bridge design.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 4; 685--700
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Predicting Emotional Intelligence in Maritime Management: Imperative, Yet Elusive
Autorzy:
Potoker, E. S.
Corwin, J. A.
Powiązania:
https://bibliotekanauki.pl/articles/116623.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Maritime Management
emotional intelligence
Crew Resource Management
Human Factor
Leadership
Psychology
Opis:
There is extensive literature addressing the subject of “emotional intelligence” (EI) and its importance to the profile of leaders and models of leadership. Despite what some have argued as the sine qua non of leadership, there are arguably few, if any, valid instruments available to predict demonstration of EI competencies. This paper focuses on EI and challenges to measurement as it relates to leadership development in maritime management —where EI competencies are deemed critical to effective performance. The authors review and evaluate current instruments that claim to measure EI, survey hiring practices in selected companies in the shipping industry, and make recommendations for further research.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 2; 225-229
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Linear Sturm-Liouville problems with Riemann- Stieltjes integral boundary conditions
Autorzy:
Kong, Q.
George, T. E. S.
Powiązania:
https://bibliotekanauki.pl/articles/254797.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
nodal solutions
integral boundary value problems
Sturm-Liouville problems
eigenvalues
matching method
Opis:
We study second-order linear Sturm-Liouville problems involving general homogeneous linear Riemann-Stieltjes integral boundary conditions. Conditions are obtained for the existence of a sequence of positive eigenvalues with consecutive zero counts of the eigenfunctions. Additionally, we find interlacing relationships between the eigenvalues of such Sturm-Liouville problems and those of Sturm-Liouville problems with certain two-point separated boundary conditions.
Źródło:
Opuscula Mathematica; 2018, 38, 4; 557-571
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of methods for the detection of spatial outliers in the yield data of winter wheat
Ocena metod detekcji obserwacji odstających w przestrzeni w danych dla plonów pszenicy ozimej
Autorzy:
Gozdowski, D.
Samborski, S.
Dobers, E.S.
Powiązania:
https://bibliotekanauki.pl/articles/9643.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Katedra Zastosowań Matematyki i Informatyki
Źródło:
Colloquium Biometricum; 2010, 40
1896-7701
Pojawia się w:
Colloquium Biometricum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Linkage of two mutant allozymes for Amp2 and Aat2 with marker loci on barley [Hordeum vulgare L.] chromosomes 1 and 6
Autorzy:
Kucharska, M
Kaczorowska, K.
Ali, E.S.
Powiązania:
https://bibliotekanauki.pl/articles/2048291.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chromosome
starch
isoenzyme
barley
linkage
gel electrophoresis
mutant
allozyme
genetic analysis
Hordeum vulgare
genetic marker
Opis:
To saturate barley (Hordeum vulgare L.) genetic maps the linkage relationships of two isoenzyme loci Amp2 (aminopeptydase) and Aat2 (aspartate aminotransferase) with known genetic markers were investigated. Results of the genetic analysis support previous information on the localization of these loci on chromosome 1 and 6, respectively. The following recombination values were estimated: between locus Amp2 and T1-3b translocation break point 13.8 ± 2.1%, between locus Aat2 and translocation T6-7i, 17 ± 3.0% and between locus Aat2 and marker о 24.1 ± 3.0%.
Źródło:
Journal of Applied Genetics; 1998, 39, 2; 147-150
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of quality of heterogeneous mechanical systems using impedance method
Autorzy:
Volkovas, V.
Gulbinas, R.
Slavickas, E. S.
Powiązania:
https://bibliotekanauki.pl/articles/329300.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
diagnostyka
jakość
impedancja
metoda
heterogeneous mechanical system
quality
impedance
diagnostics
Opis:
The paper analyzes methodology for investigation of dynamic characteristics of heterogeneous systems: honeycomb optical tables and pipelines with sediments, applying mechanical impedance. The developed methodology may be used to assess the quality of plate or cylindrical heterogeneous structures, according to the dynamic characteristics and parameters established in the methodology. It was shown that impedance characteristics are informative to determine some parameters of the quality of honeycomb optical tables and are correlated with the thickness of the pipe's inner sediment layer. Therefore it is possible to choose typical resonance frequencies and according to their changes, the decision about inner layer presence and its value can be made.
Źródło:
Diagnostyka; 2008, 3(47); 83-88
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-Frame Attitude Determination Methods for Nanosatellites
Autorzy:
Cilden Guler, D.
Conguroglu, E. S.
Hajiyev, C.
Powiązania:
https://bibliotekanauki.pl/articles/221643.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
attitude determination
single-frame methods
algebraic method
covariance analysis
vector observation
Opis:
Single-frame methods of determining the attitude of a nanosatellite are compared in this study. The methods selected for comparison are: Single Value Decomposition (SVD), q method, Quaternion ESTimator (QUEST), Fast Optimal Attitude Matrix (FOAM) − all solving optimally the Wahba’s problem, and the algebraic method using only two vector measurements. For proper comparison, two sensors are chosen for the vector observations on-board: magnetometer and Sun sensors. Covariance results obtained as a result of using those methods have a critical importance for a non-traditional attitude estimation approach; therefore, the variance calculations are also presented. The examined methods are compared with respect to their root mean square (RMS) error and variance results. Also, some recommendations are given.
Źródło:
Metrology and Measurement Systems; 2017, 24, 2; 313-324
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Batch removal of Pb (ΙΙ) ions from aqueous medium using gamma-Al2O3 nanoparticles/ethyl cellulose adsorbent fabricated via electrospinning method: An equilibrium isotherm and characterization study
Autorzy:
Pouya, E. S.
Fatoorehchi, H.
Foroughi-Dahr, M.
Powiązania:
https://bibliotekanauki.pl/articles/778139.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Adsorption
Pb (II) ions
Ethyl cellulose
Gamma-Al2O3 nanoparticles
Electrospinning
Opis:
The aim of the present work is to study the efficiency of a biocompatible polymer-based adsorbent for the removal of Pb (II) ions whose devastating effects on people’s health is a matter of great concern from aqueous solution. In this study, ethyl cellulose and gamma-Al2 O<3  nanoparticles/ethyl cellulose electrospun adsorbents were prepared for the batch removal of Pb (II) ions from aqueous solution. Both samples were characterized using contact angle analysis, N2 adsorption/desorption technique, FT-IR and SEM. The Freundlich model (R-square = 0.935 and RMSD (%) = 6.659) and the Dubinin-Radushkevich model (R-square = 0.944 and RMSD (%) = 6.145) were found to be more reliable in predicting the experimental data from the adsorption of Pb (II) ions onto the electrospun gamma-Al2 O<3  nanoparticles/ethyl cellulose than the Langmuir model (R-square = 0.685 and RMSD (%) = 14.61) and also the Temkin model (R-square = 0.695 and RMSD (%) = 14.38).
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 2; 32-39
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microemulsions Based on Propylene Glycol Diesters of Caprylic and Capric Acids
Autorzy:
Jaworska, M.A.
Sikora, E.S.
Ogonowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/779236.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Propylene Glycol Dicaprylate/Dicaprate (Crodamol PC),
nanoemulsions
microemulsions
low energy method
Opis:
The aim of this work was preparation and characterization of o/w nano and microemulsions containing Crodamol PCŽ as the oil phase. An influence of surfactants system applied in formulations on the properties of the obtained emulsions has been studied. The emulsions were prepared by phase inversion composition method. The measurement of the internal phase droplet size and the study of rheological properties were done. The obtained results showed that the prepared transparent emulsion systems are nano and microemulsion formulation. Moreover, it was concluded that the microemulsions stability and the size of the internal phase droplets depended on the type and the concentration of emulsifier and on the ratio of water phase to oil. Rheological studies have confirmed that the obtained microemulsions showed pseudoplastic behaviour.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 1; 68-73
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implication of forest zonation on tree species composition, diversity and structure in Mabira Forest, Uganda
Autorzy:
Weldemariam, E.C.
Jakisa, E.S.
Ahebwe, D.A.
Powiązania:
https://bibliotekanauki.pl/articles/9997.pdf
Data publikacji:
2017
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
forest zonation
management zone
tree
woody species
plant species
species composition
species diversity
species structure
Mabira Forest Reserve
Uganda
Opis:
The study aimed to investigate effectiveness of forest management zoning in conserving biodiversity of Mabira forest reserve. The study sites buffer, production, and strict nature reserve management zones were purposively selected. This was undertaken through investigating woody species diversity, composition and structure. A total of 60 sampling plots with a size of 20 m x10 m were used to collect vegetation data. Variables such as woody plant species identification and counts as well as diameter at breast height (DBH) of trees were done. The result depicted a total of 65 woody species; 39 in buffer, 19 in productions and 37 in strict nature reserve. Of these, only 9 trees species were found common to all zones and their Sorensen similarity coefficient was 0.2213. The population structure of the buffer and strict nature reserve zones was found to be a J - shape pattern, whereas the production zone shown an inverted J-shape pattern. Higher woody species diversity was depicted in the buffer and strict nature zones with (H’=2. 73512) and (H’=2. 68412) respectively, and lower in a production zone (H’=1. 63628). The evenness index value of a buffer zone was (J =0. 746574), strict nature (J= 0.743335) and production (J=0. 555719). The production zone had shown higher IVI values followed by buffer and strict nature reserve zone. The most important woody species identified based on their IVI value were Broussonetia papyrifera (Production), Acalypha neptunica (Buffer), Funtumia Elastica (strict nature reserve). The existing forest management is effective in conserving the biodiversity of the forest reserve. Nevertheless, the production zone was still suffering from exploitation of the surrounding community, hence serve for protecting the remaining management zones from further human interference. Further investigation is also required on the adjacent community perceptions of the forest management zoning.
Źródło:
Environment, Earth and Ecology; 2017, 1, 1
2543-9774
2451-4225
Pojawia się w:
Environment, Earth and Ecology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolution of the pterosaur pelvis
Autorzy:
Hyder, E.S.
Witton, M.P.
Martill, D.M.
Powiązania:
https://bibliotekanauki.pl/articles/22877.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Pterosaur pelvic girdles are complex structures that offer a wealth of phylogenetic and biomechanical information, but have been largely overlooked by pterosaur anatomists. Here, we review pterosaur pelvic morphology and find significant differences that correlate well with pterosaur clades identified in some phylogenetic analyses. We find that the length and orientation of the iliac processes, position of the acetabulum, extent of the ischiopubic plate and presence of supraneural fusion in adult individuals are taxonomically informative. Ontogenetic changes in pelvic morphology dictate that osteologically mature specimens are required to assess the development of many of these characteristics. We suggest that pelvic characters can readily be incorporated into pterosaur phylogenetic analyses and may assist in resolving the controversial interrelationships of this group. Distinctive pterosaur pelvic morphotypes suggest considerable differences in stance, locomotory kinematics and hindlimb functionality across the group.
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) as a new menace to cotton in Egypt and its chemical control
Autorzy:
El-Zahi, E.-Z.S.
Aref, S.A.E.-S.
Korish, S.K.M.
Powiązania:
https://bibliotekanauki.pl/articles/65005.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
insect
cotton mealybug
mealybug
Phenacoccus solenopsis
Hemiptera
Pseudococcidae
new menace
cotton
Egypt
chemical control
Opis:
The cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) is a polyphagous sap sucking insect with a wide geographical and host range causing severe losses in economically important crops. This study represents the first record of P. solenopsis as a new insect attacking cotton plants (Gossypium barbadense var. Giza 86) in Kafr El-Sheikh governorate, Egypt. The insect was noticed on cotton plants for the first time during its growing season of 2014. The mealybug specimens were collected from infested cotton plants and identified as P. solenopsis. In an attempt to control this pest, eight toxic materials viz., imidacloprid, thiamethoxam, flonicamid, emamectin-benzoate, chlorpyrifos, methomyl, deltamethrin and mineral oil (KZ-oil), belonging to different chemical groups, were tested for their influence against P. solenopsis on cotton under field conditions. Methomyl, imidacloprid, thiamethoxam and chlorpyrifos showed the highest efficacy against P. solenopsis recording 92.3 to 80.4% reduction of the insect population. Flonicamid, emamectin-benzoate and KZ-oil failed to exhibit sufficient P. solenopsis control.
Źródło:
Journal of Plant Protection Research; 2016, 56, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis of a CDMA wireless local loop systems
Autorzy:
Hassan, E. S.
El-Dolil, S. A.
Dessouky, M. I.
Powiązania:
https://bibliotekanauki.pl/articles/378461.pdf
Data publikacji:
2006
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Elektronowej
Opis:
In this paper, the capacity of the Code Division Multiple Access Wireless Local Loop (CDMA WLL) sysytem is analytically derived, and the capacity gain achieved in a CDMA WLL over a cellular mobile environment is calculated. The results show that the CDMA WLL system can support up to 36% more users than CDMA cellular mobile system. The paper also propose a new approach to increase the reverse lonk capacity of the CDMA WLL system, which synchronize the reverse link so that signals transmitted from different subscriber units within the same cell are time aligned at the base station )BS). A theoretical analysis of the potential capacity gain of reverse link synchronous CDMA WLL is presented.
Źródło:
Electron Technology : Internet Journal; 2005-2006, 37/38, 3; 1-7
1897-2381
Pojawia się w:
Electron Technology : Internet Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficient Numerical Algorithms for Balanced Stochastic Truncation
Autorzy:
Benner, P.
Quintana-Orti, E. S.
Quintana-Orti, G.
Powiązania:
https://bibliotekanauki.pl/articles/908055.pdf
Data publikacji:
2001
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
algorytmy
metoda Newtona
model reduction
stochastic realization
balanced truncation
sign function method
Newton's method
Opis:
We propose an efficient numerical algorithm for relative error model reduction based on balanced stochastic truncation. The method uses full-rank factors of the Gramians to be balanced versus each other and exploits the fact that for large-scale systems these Gramians are often of low numerical rank. We use the easy-to-parallelize sign function method as the major computational tool in determining these full-rank factors and demonstrate the numerical performance of the suggested implementation of balanced stochastic truncation model reduction.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2001, 11, 5; 1123-1150
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural frequencies of FG plates with two new distribution of porosity
Autorzy:
Merdaci, Slimane
Mostefa, Adda Hadj
Khayal, Osama M. E. S.
Powiązania:
https://bibliotekanauki.pl/articles/1839855.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
częstotliwość drgań
porowatość
odkształcenie
functionally graded plate
natural frequency
even
uneven
porosity
Opis:
The functionally graded plates (FGP) with two new porosity distributions are examined in this paper. In this work the plate is modeled using the higher-order shear deformation plate principle. The shear correction variables are neglected. To evaluate the equations of motion, the Hamilton method will be used herein. Therefore, the free vibration analysis of FG plate is developed in this work. For porous smart plates with simply-supported sides, natural frequencies are obtained and verified with the established findings in the literature. The impact of the porosity coefficient on the normal frequencies of the plate for various thickness ratios, geometric ratios, and material properties was investigated in a thorough numerical analysis.
Źródło:
International Journal of Applied Mechanics and Engineering; 2021, 26, 2; 128-142
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Resistance risk assessment: realized heritability, cross resistance and resistance stability of acetamiprid in the cotton aphid, Aphis gossypii Glover (Homoptera: Aphididae)
Autorzy:
Mokbel, E.M.S.
Powiązania:
https://bibliotekanauki.pl/articles/65165.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
resistance risk
assessment
heritability
resistance stability
acetamiprid
cotton aphid
Aphis gossypii
Homoptera
Aphididae
Opis:
The cotton aphid, Aphis gossypii is an economically significant insect pest infesting various important crops and vegetables. The neonicotinoid, acetamiprid was recommended against aphids with excellent results. Resistance emergence and environmental pollution makes acetamiprid a favorable alternative to conventional insecticides. The aims of the present work were to predict acetamiprid resistance risk in A. gossypii, investigate cross resistance to other tested insecticides and explore acetamiprid stability in the absence of selection. A field-collected population from Sharqia governorate, Egypt was selected with acetamiprid. After 16 generations of selection, there was a 22.55-fold increase in LC50 and the realized heritability (h2) of resistance was 0.17. Projected rates of resistance indicated that, ifh2 = 0.17 and 50% of the population was killed at each generation, then a tenfold increase in LC50 would be expected in 12.2 generations. If h2 was 0.27 then 7.63 generations would be needed to achieve the same level. In contrast, with h2 of 0.07 it necessitates about 30 generations of selection to reach the same level. Cross resistance studies exhibited that the selected strain showed obvious cross resistance to the other tested neonicotinoid members, moderate cross resistance to alpha-cypermethrin and no cross resistance to pymetrozine. Fortunately, resistance to acetamiprid in the cotton aphid was unstable and resistance reverses the nearby susceptible strain throughout five generations without exposure to acetamiprid. Our results exhibited cotton aphid potential to develop resistance to acetamiprid under continuous selection pressure. The instability of acetamiprid makes A. gossypii amenable to resistance management tactics such as rotation with pymetrozine.
Źródło:
Journal of Plant Protection Research; 2018, 58, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of metabolic enzymes in resistance to chlorpyrifos-methyl in the cowpea aphid, Aphis craccivora (Koch)
Autorzy:
Mokbel, E.M.S.
Swelam, E.S.H.
Radwan, E.M.M.
Kandil, M.A.-E.
Powiązania:
https://bibliotekanauki.pl/articles/66464.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metabolic enzyme
resistance
chlorpyrifos-methyl insecticide
insecticide
cowpea aphid
aphid
Aphis craccivora
Opis:
The cowpea aphid, Aphis craccivora management relies mainly on chemical control. As a result extensive and repeated treatment of insecticides has led to the development of aphid resistance to commonly used insecticides. To investigate chlorpyrifos-methyl resistance in A. craccivora, a field strain was selected for 24-generations to achieve a resistance factor of 82.3 fold compared with a susceptible strain. In the resistant strain, malathion and lambda-cyhalothrin exhibited obvious cross-resistance; while fenvalerate and dinotefuran showed moderate cross-resistance. In contrast, slight or no cross-resistance was obtained with the other tested insecticides. To investigate metabolic resistance mechanisms, integration of biochemical and synergism assays was conducted. Results showed the key role of esterase (EST) and mixed function oxidases (MFO); however, glutathione-s-transferase (GST) contributed less to resistance. Cross-resistance studies showed the need for rotation with non-cross resistant insecticides as a resistance management tactic.
Źródło:
Journal of Plant Protection Research; 2017, 57, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancing filtration rate of new valley oxidized phosphate concentrate with additives
Autorzy:
Abdel-Aal, E.-S.
Abdel Rahman, E.
Kandil, A.-H.
Powiązania:
https://bibliotekanauki.pl/articles/110175.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
New Valley phosphate concentrate
surfactant
filtration rate
gypsum morphology
crystal size distribution
Opis:
Phosphoric acid is utilized for production of fertilizers. It is mainly produced by wet processes, in which phosphate concentrate, produce by several operations including crushing, scrubbing, classification, attritioning, and desliming, is leached with sulfuric acid with coproduction of calcium sulfate dihydrate (phosphogypsum). The New Valley oxidized phosphate concentrate was processed for phosphoric acid production by addition of certain additives to improve gypsum filtration through modifying its morphology and particle size distribution. The additives used were cetylpyridinium chloride (CPC) as a cationic surfactant, sodium dodecyl sulfate (SDS) as an anionic surfactant and sulfonic acid (SA). The applied dosages ranged from 0.25 to 2.5 kg additive/Mg P2O5 in the phosphate concentrate. The filtration rate of the New Valley oxidized phosphate concentrate is 3.6 Mg P2O5 /m2day without additives. The filtration rate was increased by 33% and 31% with 1 and 0.8 kg/Mg P2O5 doses of CPC surfactant and sulfonic acid (SA), respectively. On the other hand, the filtration rate was decreased by 33% with addition of 1 kg/Mg P2O5 dose of SDS. The aspect ratios of gypsum crystals were 6:1, 3:1, 3:1 and 12:1 without additive, with CPC, SA and SDS surfactant, respectively. Reaction efficiencies without and with 0.8 kg/Mg P2O5 of CPC, SA and SDS dose of additives were 95.0%, 97.9%, 97.9% and 94.7%, respectively. The P2O5 recoveries without and with 0.8 kg/Mg P2O5 of CPC, SA and SDS dose of additives were 92.6%, 95.5%, 95.8% and 90.8%, respectively.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 1; 124-135
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trachyplax arctica, a new multiplated problematic fossil from the Lower Cambrian of North Greenland
Autorzy:
Larsson, C M
Peel, J.S.
Hogstrom, A.E.S.
Powiązania:
https://bibliotekanauki.pl/articles/20953.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Trachyplax arctica
fossil
paleontology
Lower Cambrian
Cambrian
North Greenland
Greenland
Trachyplax
Problematica
sclerite
scleritome
Multiplacophora
Paralledal Formation
Opis:
A new scleritome−bearing organism with eight sclerite types, Trachyplax arctica gen. et sp. nov., is described from the lower Cambrian Paralledal Formation of North Greenland. The originally calcareous sclerites are now silicified; no microstructures are preserved. The dominant sclerite type (A; maximum dimension 19.3 mm) is bilaterally symmetrical, strongly arched, with an oval shield showing co−marginal growth lines and a projecting rostrum with prominent radial ornamentation. A similar sclerite morphology can be identified in Silurian–Carboniferous multiplacophoran molluscs but the remaining sclerite types, which also display a combination of concentric and radial ornamentation, find no clear equivalents. Two models for scleritome reconstruction are presented, based on the relative abundance of the sclerites, but neither promotes a satisfactory assignment to a higher taxon. Despite the morphological dissimilarities, possibly reflecting the age discrepancy, reference to the Multiplacophora is most attractive and entails a substantial extension of the known geological range of that group.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 3; 513-523
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Offshore drilled cuttings management
Autorzy:
Bilstad, T.
Stenberg, E. S.
Jensen, B.
Larsen, T.
Toft, M.
Powiązania:
https://bibliotekanauki.pl/articles/298998.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
drilling
fluids
muds
cuttings
cleaning
TCC
reuse
disposal
regulations
wiercenie
płyny
muły
ponowne użycie
regulacje
Opis:
The search for offshore fossil fuels generates large volumes of drilled cuttings which under certain conditions are defined hazardous, negating disposal at sea. Much of the cuttings end up in onshore landfills. The types of fluids used in well drilling operations determine to which extent the cuttings are considered hazardous. The three main types of fluids are oil based mud (OBM), water based mud (WBM) and synthetic based mud (SBM). The purpose of adding fluids or mud in the drilling operations is to cool and lubricate the drill bit, to stabilize the well bore, to control subsurface pressure, formation pressure, well stability and corrosion, and to carry cuttings to the surface. OBM is based on either diesel or mineral oil. One advantage of OBM is enhanced drilling performance, especially in technical challenging environments. A drawback, however, is the toxicity of OBM, prohibiting discharge of cuttings to the marine environment. Drilled cuttings are rocks produced during drilling operations, becoming coated with drilling fluids. Historically, cuttings have been disposed to sea. However, recent environmental laws and regulations prohibit such practice. Re-injection of cuttings as a slurry into subsurface formations has also been discontinued due to leaks and re-entering of slurry into the bottom waters. Transport of cuttings to shore is therefore the choice. For logistics and cost reasons emphasis is put on offshore waste minimization and reuse/recycle. Total fluid management (TFM) leads to environmental impact reduction (EIR). Minimization of drilling fluids and reuse of fluids lead to cost reduction. Volume of cuttings is reduced through directional drilling and by drilling smaller diameter holes. Synthetic based drilling fluids (SBM) are replacing OBM. Drilling wastes are further separated into a fluid and a solid phase. The solids may be used for road and other construction purposes, whereas the OBM is burned for energy recovery. The purpose of the thermo-mechanical cuttings cleaner (TCC) is to convert hazardous oily cuttings into useful products. TCC facilities are only available onshore in Norway. However, offshore TCC units will in due time be introduced, negating the need for transport of cuttings to shore. Cuttings are allowed disposed to sea when no toxic fluids are attached. TCC separation is accomplished by generating temperatures of 240-300 degrees of Celsius sufficient for evaporation of oil and water from the mineral solids.
Źródło:
AGH Drilling, Oil, Gas; 2013, 30, 1; 47-50
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrospinning of polymeric fibres: an unconventional view on the influence of surface tension on fibre diameter
Elektroprzędzenie włókien polimerowych – niekonwencjonalny pogląd na wpływ naprężenia powierzchniowego na średnice włókien
Autorzy:
Araújo, E. S.
Nascimento, M. L. F.
de Oliveira, H. P.
Powiązania:
https://bibliotekanauki.pl/articles/232610.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
electrospinning
polymeric fibres
Taylor-cone
surfactant
surface tension
elektroprzędzenie
włókna polimerowe
napięcie powierzchniowe
Opis:
The production of regular and bead-free electrospun polymeric fibres requires an adequate combination of different parameters applied in the experimental setup viz. voltage for electrodeposition, viscosity of the solution, density of the polymeric support, the distance between electrodes and the geometry of the spinneret. Determination of the physical balance of forces on the droplet during fibre production was explored and provides relevant theoretical information about the surface tension and radius of polymeric fibres. Based on these predictions, we prepared polymeric electropun fibres of poly (vinyl alcohol), poly (vinyl pyrrolidone) and Eudragit® L100 in order to analyse non-conventional physical properties of experimental systems such as droplet stiffness and their influence on the diameter of resulting fibres.
Produkcja za pomocą elektroprzędzenia regularnych włókien polimerowych, wolnych od zgrubień wymaga dobrania odpowiedniej kombinacji różnych parametrów stanowiska przędącego takich jak np. napięcie między elektrodami, lepkość roztworu przędzalniczego, gęstość, odległość pomiędzy elektrodami i geometria układu przędącego. Badano fizycznie określony balans sił działający na wypychaną kroplę roztworu podczas tworzenia włókna. Badania eksperymentalne dostarczyły odpowiednich teoretycznych informacji o naprężeniu powierzchniowym i średnicy tworzonych włókien polimerowych. W oparciu o uzyskane informacje przygotowano elektroprzędzenie włókien z alkoholu poliwinylowego, alkoholu poliwinylopirolidowego i preparatu Eudragit® L100. Następnie na podstawie wcześniejszych rozważań i uzyskanych wyników eksperymentalnych przeprowadzono analizę wpływu poszczególnych czynników na średnicę otrzymywanych włókien.
Źródło:
Fibres & Textiles in Eastern Europe; 2016, 1 (115); 22-29
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Triton X-100 on PVA Fibres Production by the Electrospinning Technique
Wpływ Triton X-100 na produkcję włókien PVA metodą elektroprzędzenia
Autorzy:
Araújo, E. S.
Nascimento, M. L. F.
de Oliveira, H. P.
Powiązania:
https://bibliotekanauki.pl/articles/233825.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
electrospinning
poly(vinyl alcohol) fibres
surfactant
beads
fibre production
elektroprzędzenia
alkohol poliwinylowy
włókna
środki powierzchniowo czynne
zgrubienia w produkcji włókien
Opis:
Electrospinning represents a low cost technique applied in the production of micro- and nano-fibres. The use of poly(vinyl alcohol) as supporting matrix in aqueous solution for fibre deposition introduces important advantages related with drug release (based on the low toxicity of polymer). On the other side, imperfections of resulting fibres (bead formation) represents an impediment to be circumvented. The introduction of non ionic surfactant (triton X-100) circumvents bead formation and improves the homogeneity of fibre, as verified in the analysis of thermal, structural and morphological properties of PVA net. The results indicate that minimal dispersion of triton X-100 in solution (in the order of 1 wt%) affects the circularity of beads, while at 10 wt% a reduction in the defect concentration in the order of five times is verified with a reasonable reduction in the diameter of the remaining defects and improvement in the regularity of fibres.
Elektroprzędzenie jest techniką o niskich kosztach dla produkcji mikro i nano włókien. Zastosowanie PVA dla odkładania się włókien w wodnym roztworze posiada istotne zalety związane z uwalnianiem się leków i niską toksycznością polimeru. Niedoskonałości otrzymanych włókien w postaci zgrubień skłaniają do poszukiwania środków zaradczych. Badania wykazały, że małe ilości Triton X-100 zdyspergowanego w roztworze w ilości ok. 1% wpływają na zaokrąglenie zgrubień, podczas gdy przy 10% uzyskuje się pięciokrotną redukcję ilości defektów i ich zmniejszenie.
Źródło:
Fibres & Textiles in Eastern Europe; 2013, 4 (100); 39-43
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microbial plankton communities in the coastal Southeastern Black Sea: biomass, composition and trophic interactions
Autorzy:
Aytan, U.
Feyzioglu, A.M.
Valente, A.
Agirbas, E.
Fileman, E.S.
Powiązania:
https://bibliotekanauki.pl/articles/48497.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
phytoplankton
microzooplankton
plankton community
Black Sea
biomass composition
trophic interaction
food web
grazing
Źródło:
Oceanologia; 2018, 60, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gender differential in the incidence of diabetes mellitus among the patients in Udi Local Government Area of Enugu state, Nigeria
Autorzy:
Chukwu, B.N.
Ezebuiro, V.O.
Samuel, E.S.
Nwachukwu, K.C.
Powiązania:
https://bibliotekanauki.pl/articles/11829.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
gender
incidence
diabetes mellitus
insulin
hyperglycemia
glucose
patient
human disease
metabolic disease
Udi Local Government Area
Enugu state
Nigeria
Opis:
Diabetes Mellitus is a chronic metabolic disease characterized by hyperglycemia and disturbances of carbohydrate, fat and protein metabolism. It is a major public health problem and disease burden worldwide, and especially in Nigeria. This study determined the gender differential in the incidence of Diabetes mellitus among the patients in Udi L.G.A of Enugu State. Three research questions and one hypothesis were formulated to guide the study. Descriptive survey design was employed. A sample of 343 diabetes mellitus patients were randomly selected and used for the study. Researchers design data documentary profoma was used to collect the data from selected health facilities in respect to the patients’ gender and their fasting sugar level as contained in their folder or hospital record/register. Frequency and percentages was used to answer research question while the null hypothesis was tested using Chi- square at 0.05 level of significance. The finding of the result revealed a high incidence of Diabetes Mellitus in 2012, females recorded a high incidence of DM from 2008-2012 and high percentage of fasting blood sugar level than male. The finding also revealed no difference in the fasting blood sugar based on gender. It is recommended among others that diagnostic investigation on human placental lactose is advocated to reduce or stop its opposition to insulin secretion during pregnancy.
Źródło:
International Letters of Natural Sciences; 2013, 04
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mitigation of salinity stress effects on growth, physio-chemical parameters and yield of snapbean (Phaseolus vulgaris L.) by exogenous application of glycine betaine
Autorzy:
Desoky, E-S.M.
Ibrahim, S.A.
Merwad, A-R.M.
Powiązania:
https://bibliotekanauki.pl/articles/11220.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2019, 76
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Degradation Characteristics of SPF/SPS Biocomposites
Charakterystyka degradacji biokompozytów z włókien i skrobi z palmy cukrowej
Autorzy:
Sahari, J
Sapuan, S. M.
Zainudin, E S
Maleque, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/233677.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
sugar palm fibres
sugar palm starch
biodegradable
environmental
biokompozyt
włókna z palmy cukrowej
biodegradacja
degradacja biokompozytów
Opis:
In this work, sugar palm fibres (SPF) were used as a biodegradable reinforcement. SPF were incorporated into sugar palm starch (SPS) plasticised with glycerol using the compression molding process. Then the SPS and SPF/SPS biocomposites were submitted to biodegradation by means of soil burial experiments. The environmental effect on the SPS and SPF/SPS biocomposites were a loss in tensile strength of 78.09% and 53.67%, respectively, at the end of 72 hrs of the weathering testing period. The biodegradation test shows that SPS degrades very quickly and loses 63.58% of its weight at the end of 72 hrs compared to the SPF/SPS biocomposites.
Dla otrzymania biokompozytów zastosowano włókna z palmy cukrowej jako biodegradowalne wzmocnienie oraz matrycę ze skrobi tejże palmy. Plastyfikację przeprowadzono wykorzystując glicerynę w procesie wytłaczania. Gotowe biokompozyty były poddane biodegradacji przez umieszczenie w odpowiedniej glebie. Po 72 godzinach stwierdzono ubytek masy rzędu 78% podczas gdy w warunkach atmosferycznych stwierdzono ubytek masy około 54%. Stwierdzono również, że sama skrobia degraduje bardzo szybko i traci około 63% masy pod koniec 72- godzinnego okresu starzenia w warunkach atmosferycznych.
Źródło:
Fibres & Textiles in Eastern Europe; 2014, 5 (107); 96-98
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of azoxystrobin fungicide improves drought tolerance in tomato, via enhancing physio-biochemical and anatomical feature
Autorzy:
Ali, A.A.I.
Desoky, E-S.M.
Rady, M.M.
Powiązania:
https://bibliotekanauki.pl/articles/11895.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2019, 76
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Value-based management as the innovating paradigm of contemporary governance : a theoretical approach
Zarządzanie przez wartość jako innowacyjny paradygmat współczesnego zarządzania : podejście teoretyczne
Autorzy:
Oane-Marinescu, C. M.
Smoląg, K.
Marinescu, E. S.
Szopa, R.
Powiązania:
https://bibliotekanauki.pl/articles/404932.pdf
Data publikacji:
2015
Wydawca:
Politechnika Częstochowska
Tematy:
VBM
performance
value creation
wydajność
tworzenie wartości
Opis:
The magnitude and the dynamism of economic, political and social phenomena and the spectacular challenges of the 21st century have led to new approaches of the corporate performance management and to the development of new paradigms. Value-based management (VBM) has emerged as a viable alternative to the various management systems focused on increasing performance which have not recorded the aimed results subsequent to shortcomings of conceptualization, evaluation mechanisms or the concrete possibility of implementation. This article aims to present a theoretical approach of VBM as the complex management philosophy able to offer a holistic solution for achieving performance.
Wielkość i dynamika zjawisk ekonomicznych, politycznych i społecznych oraz spektakularne wyzwania 21 wieku doprowadziły do nowych podejść w zarządzaniu wydajnością przedsiębiorstwa i rozwoju nowych paradygmatów. Zarządzanie przez wartość (VBM) wyłoniło się jako realna alternatywa dla różnych systemów zarządzania ukierunkowanych na zwiększenie wydajności, które nie odnotowały zamierzonych wyników w następstwie braków konceptualizacji, mechanizmów oceny lub konkretnej możliwości realizacji. Artykuł ma na celu przedstawienie teoretycznego podejścia do zarządzania przez wartość VBM jako złożonej filozofii zarządzania będącej w stanie zaoferować całościowe rozwiązanie dla osiągnięcia wydajności.
Źródło:
Polish Journal of Management Studies; 2015, 12, 1; 106-120
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of fungal inoculum application on changes in organic matter of leaf litter composting
Autorzy:
Iravan, B.
Kasiamdari, R.S.
Sunarminto, B.H.
Soetarto, E.S.
Hadi, S.
Powiązania:
https://bibliotekanauki.pl/articles/971526.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
leaf litter
lignocellulolytic
inoculum
consortium
composting
Opis:
The decomposition of organic matter on leaf litter substrat runs very slowly in nature resulting in the accumulation of litter in the ecosystem and has even become an organic waste that creates many problems. The research was dealt with the use of lignocellulolytic fungi inoculum consisting of 3 isolates: Aspergillus fumigatus (cellulolytic), A. tubingensis (xylanolytic) and Geotrichium sp (ligninolytic) as starter of leaf litter composting. The purpose of the study is to understand the pattern of humic-fulvat acid and C/N ratio on the process of composting of leaf litter with the addition of inoculum. Observations were made to the chemical changes of compost for 3, 6 and 9 weeks of composting and the data were analyzed in RM-anova (Repeated Measures of anova). The result shows the best pattern of humic acid and fulvic change from the initial to final composting occurs at the Geotrichum sp inoculum of 0.60 or 105.2% and for fulvic are of 0.55 or 56.1% of baseline. The highest ratio value of CHA/CFA at the end of observation was by consortium of A. fumigatus and A. tubingensis inoculums that was 2.94 and the lowest value was at commercial inoculum that was 0.80; and the sharpest change value also occurred in the consortium A. fumigatus and A. tubingensis inoculums of 2.20 or 297.3%. Therefore the consortium isolates were capable of causing the maturity of the compost most rapidly compared to other isolates.
Źródło:
Polish Journal of Soil Science; 2019, 52, 1; 143-152
0079-2985
Pojawia się w:
Polish Journal of Soil Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of infiltration models for mineral soils with different land uses in the tropics
Ocena modeli infiltracji opracowanych dla gleb mineralnych o różnym typie użytkowania w tropikach
Autorzy:
Suryoputro, N.
Suhardjono, S.
Soetopo, W.
Suhartanto, E. S.
Limantara, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/947315.pdf
Data publikacji:
2018
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
infiltration models
land use
mineral soil
tropical climate
gleby mineralne
klimat tropikalny
modele infiltracji
użytkowanie ziemi
Opis:
The aims of this study were to evaluate five infiltration models for mineral soils in the tropics with different land use types, such as settlements, plantations, rice fields, and forests. The infiltration models evaluated were Green–Ampt, Kostiakov, Kostiakov–Lewis, Philip, and Horton. The research was conducted at the Amprong watershed, Malang, Indonesia. The infiltration rate of the thirteen soil samples was analysed. The infiltration was tested using Turf-Tech infiltrometer. Moreover, each soil sample was tested in terms of the bulk density, specific gravity, porosity, soil moisture, and soil texture. The results of the study indicate that there is no significant difference (α = 5%) in the infiltration rate among the five models of infiltration. The infiltration rate in the study site was considered fast. Three models exhibiting the best performance are Kostiakov, Kostiakov–Lewis, and Horton model, respectively. The highest infiltration rate occurred in the forest land use while the lowest occurred in the rice field land use. The results of this study suggest that the infiltration model parameters correlate closely with the initial infiltration rate (fo) and the final infiltration rate (fc). In other words there is a correlation between the soil's ability to absorb water (representing the capillary force or horizontal flow) at the beginning of the infiltration (fo) and the gravity or the vertical flow upon reaching the final infiltration rate (fc).
Celem badań prezentowanych w niniejszej pracy była ocena pięciu modeli infiltracji opracowanych dla gleb mineralnych o różnym typie użytkowania w tropikach, takich jak: obszary zabudowane, plantacje, pola ryżowe i lasy. Oceniano modele Greena–Ampta, Kostiakova, Kostiakova–Lewisa, Philipa i Hortona. Badania prowadzono w zlewni Amprong, Malang w Indonezji. Analizowano tempo infiltracji w trzynastu próbkach glebowych z użyciem infiltrometru Turf-Tech. Ponadto w każdej próbce gleby analizowano gęstość objętościową, ciężar właściwy, porowatość, wilgotność gleby i skład granulometryczny. Wyniki badań dowiodły, że nie ma istotnej różnicy w tempie infiltracji (α = 5%) obliczonej za pomocą wymienionych pięciu modeli. Uznano, że tempo infiltracji było duże. Trzy modele, kolejno: Kostiakova, Kostiakova–Lewisa i Hortona okazały się najbardziej odpowiednie. Największe tempo infiltracji stwierdzono w glebach leśnych, a najmniejsze w glebach pod polami ryżowymi. Wyniki badań sugerują, że parametry modelu infiltracji są ściśle skorelowane z początkowym (fo) i końcowym (fc) tempem infiltracji. Innymi słowy, istnieje korelacja między zdolnością gleby do absorbowania wody (reprezentowana przez siły kapilarne i przepływ poziomy) na początku infiltracji (fo) oraz siłą ciążenia i przepływem pionowym po osiągnięciu końcowego tempa infiltracji (fc).
Źródło:
Journal of Water and Land Development; 2018, 37; 153-160
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A calculation model for liquid-liquid extraction of protactinium by 2,6-dimethyl-4-heptanol
Autorzy:
Knight, A. W.
Eitrheim, E. S.
Nelson, A. W.
Schultz, M. K.
Powiązania:
https://bibliotekanauki.pl/articles/146380.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
design of experiments
protactinium
solvent extraction
Opis:
Reprocessing of spent nuclear fuel usually employs the solvent extraction technique to recover fissile material, isolate other valuable radionuclides, recover precious metals, and remove contaminants. Effi cient recovery of these species from highly radioactive solutions requires a detailed understanding of reaction conditions and metal speciation that leads to their isolation in pure forms. Due to the complex nature of these systems, identification of ideal reaction conditions for the efficient extraction of specific metals can be challenging. Thus, the development of experimental approaches that have the potential to reduce the number of experiments required to identify ideal conditions are desirable. In this study, a full-factorial experimental design was used to identify the main effects and variable interactions of three chemical parameters on the extraction of protactinium (Pa). Specifi cally we investigated the main effects of the anion concentration (NO3 –, Cl–) extractant concentration, and solution acidity on the overall extraction of protactinium by 2,6-dimethyl-4-heptanol (diisobutylcarbinol; DIBC) from both HCl and HNO3 solutions. Our results indicate that in HCl, the extraction of protactinium was dominated by the solution acidity, while in nitric acid the extraction was strongly effected by the [DIBC]. Based on our results, a mathematical model was derived, that describes the relationship between concentrations of anions, extractant, and solution acidity and the expected values of Pa distribution coefficients in both HCl and HNO3. This study demonstrates the potential to predict the distribution coefficient values, based upon a mathematical model generated by a full-factorial experimental design.
Źródło:
Nukleonika; 2015, 60, No. 4, part 2; 837-845
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ritz method for large deflection of orthotropic thin plates with mixed boundary conditions
Autorzy:
Al-Shugaa, Madyan A.
Al-Gahtani, Husain J.
Musa, Abubakr E.S.
Powiązania:
https://bibliotekanauki.pl/articles/1839813.pdf
Data publikacji:
2020
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
Ritz method
energy method
orthotropic plate bending
mixed boundary conditions
free edges
large deflection
metoda Ritza
metoda energetyczna
duże ugięcie
mieszane warunki brzegowe
gięcie blach
gięcie blach ortotropowe
Opis:
In this paper, the Ritz method is developed for the analysis of thin rectangular orthotropic plates undergoing large deflection. The trial functions approximating the plate lateral and in-plane displacements are represented by simple polynomials. The nonlinear algebraic equations resulting from the application of the concept of minimum potential energy of the orthotropic plate are cast in a matrix form. The developed matrix form equations are then implemented in a Mathematica code that allows for the automation of the solution for an arbitrary number of the trial polynomials. The developed code is tested through several numerical examples involving rectangular plates with different aspect ratios and boundary conditions. The results of all examples demonstrate the efficiency and accuracy of the proposed method.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 2; 5--16
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation for the presence of bacteria and antimicrobial resistance genes in sea snails (Rapana venosa)
Autorzy:
Ozbey, G.
Tanriverdi, E.S.
Basusta, A.
Lakshmanappa, Y.S.
Otlu, B.
Zigo, F.
Powiązania:
https://bibliotekanauki.pl/articles/28761711.pdf
Data publikacji:
2023
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2023, 30, 2; 235-243
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of seed yield, oil and mineral contents inbred pumpkin lines (Cucurbita pepo L.) under water stress
Autorzy:
Seymen, M.
Dursun, A.
Yavuz, D.
Kurtar, E.S.
Özbahçe, A.
Türkmen, Ö.
Powiązania:
https://bibliotekanauki.pl/articles/12717526.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
Water stress is one of the main constraints which could limits crop productivity, especially in arid and semi-arid regions characterized limited water resources. This study was conducted to investigate the seed yield, oil and mineral contents of 44 lines and 4 commercial pumpkin varieties (2 local and 2 hybrids) in irrigated and drought stress conditions. The study was conceived as a randomized block design with three replications and carried out during the 2017 growing season. On average, the irrigated plots produced 161.27 kg da⁻¹ seed yield whereas it was 33.67 kg da⁻¹ in non-irrigated plots. The highest yield among the commercial pumpkin varieties was obtained from the G2 hybrid variety in the irrigated conditions. On the other hand, in the non-irrigated plots, higher seed yields were obtained from G9, G34, and G36 pure lines. Drought resulted in a remarkable decrease in the total oil content and significant increase in the amount of Ca and Zn in pumpkin seeds. These results clearly indicated that G9 line, which has the highest seed yield in both irrigated and drought conditions, can be utilized as a recommendable parental pumpkin line in future hybrid breeding efforts.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 3; 89-99
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential toxicity assessment of novel selected pesticides against sand termite, Psammotermes hypostoma Desneux workers (Isoptera: Rhinotermitidae) under field conditions in Egypt
Autorzy:
Ahmed, M.A.I.
Eraky, E.-S.A.
Mohamed, M.F.
Soliman, A.-A.S.
Powiązania:
https://bibliotekanauki.pl/articles/66459.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The sand termite, Psammotermes hypostoma Desneux is a major pest in the New Valley Governorate, Egypt. Great efforts have been taken to control the pest. We evaluated the toxicity of four selected neonicotinoids [acetamiprid (20% SP), imidacloprid (20% SL), thiamethoxam (18.6% SC), and thiamethoxam (40% WG)], and one organophosphate pesticide [chlorpyrifos (48% EC)] against P. hypostoma workers. The investigation was done under field conditions, using the palm fronds method. However, the reduction percentages in palm fronds was recorded as the height of the sandy clay formed by termite workers on palm frond surfaces, when the fronds had been treated with a different concentration of each pesticide. The results were recorded after 15, 30, 45, and 60 days. Chlorpyrifos (48% EC) was considered the most potent pesticide among all the pesticides tested, but acetamiprid (20% SP) was considered the most toxic among the neonicotinoid pesticides tested. Moreover, the formulation of thiamethoxam (18.6% SC) was more powerful than thaimethoxam (40% WG). Furthermore, the reduction percentages on palm fronds increased significantly with an increase of the exposure period (from 15 to 60 days), as a result of the surface foraging activity of the sand termite workers. These results are given as unique and encouraging trends in controlling sand termites in Egypt.
Źródło:
Journal of Plant Protection Research; 2015, 55, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of gate drive circuit effect in cascode GaN-based applications
Autorzy:
Tan, Q. Y.
Narayanan, E. M. S.
Powiązania:
https://bibliotekanauki.pl/articles/2173545.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cascode GaNFETs
parasitics
buck converter
gate drive design
kaskoda GaNFETs
przetwornica
pasożytnictwo
projekt napędu bramy
Opis:
This work evaluates the influence of gate drive circuitry to cascode GaN device’s switching waveforms. This is done by comparing three PCBs using three double-pulse-test (DPT) with different gate driving loop design. Among important parasitic elements, source-side inductance shows a significant impact to gate-source voltage waveform. A simulation model based on experimental measurement of the cascode GaNFET used in this work is modified by author. The simulation model is implemented in a synchronous buck converter topology and hereby to assess the impact of gate driving loop of cascode GaN device in both continuous conduction mode (CCM) and critical conduction mode (CRM). Apart from simulation, a synchronous buck converter prototype is presented for experimental evaluation, which shows a 99.15% efficiency at 5A under soft-switching operation (CRM) with a 59ns dead-time.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; art. no. e136742
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of gate drive circuit effect in cascode GaN-based applications
Autorzy:
Tan, Q. Y.
Narayanan, E. M. S.
Powiązania:
https://bibliotekanauki.pl/articles/2128152.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cascode GaNFETs
parasitics
buck converter
gate drive design
kaskoda GaNFETs
przetwornica
pasożytnictwo
projekt napędu bramy
Opis:
This work evaluates the influence of gate drive circuitry to cascode GaN device’s switching waveforms. This is done by comparing three PCBs using three double-pulse-test (DPT) with different gate driving loop design. Among important parasitic elements, source-side inductance shows a significant impact to gate-source voltage waveform. A simulation model based on experimental measurement of the cascode GaNFET used in this work is modified by author. The simulation model is implemented in a synchronous buck converter topology and hereby to assess the impact of gate driving loop of cascode GaN device in both continuous conduction mode (CCM) and critical conduction mode (CRM). Apart from simulation, a synchronous buck converter prototype is presented for experimental evaluation, which shows a 99.15% efficiency at 5A under soft-switching operation (CRM) with a 59ns dead-time.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; e136742, 1--7
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implications of prevalence and intensity of soil-transmitted helminthes (STHs) on rural farmers’ productivity in selected districts of Sierra Leone
Autorzy:
Ngegba, M.P.
Ngegba, A.M.
Hinckley, E.S.
Koroma, M.F.
Oladele, O.I.
Powiązania:
https://bibliotekanauki.pl/articles/29430923.pdf
Data publikacji:
2023
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego; 2023, 23[38], 1; 32-45
2081-6960
Pojawia się w:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of vegetation at the late pleistocene glacial/interglacial transition (new data from the center of the east European Plain)
Autorzy:
Novenko, E. Yu.
Velicho, A. A.
Suganova, E. S.
Junge, F. W,.
Boettger, T.
Powiązania:
https://bibliotekanauki.pl/articles/1186118.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
pollen records
vegetation dynamics
Eemian
East European Plain
Opis:
The organic sediments at the Cheremoshnik site (the centre of the East European Plain) have been reinvestigated by pollen and macrofossil analysis in order to gather more detailed information on vegetation dynamics during the Late Pleistocene Glacial/Interglacial transition (boundary between OIS 6 and OIS 5e). Two phases of vegetation can be determined: an earlier forest substage ("warm") and a later ("cold") substage, when the forest communities were reduced in their area. There are probably some similar features between the succession of vegetation at the end of Dnieper (Saale) cold epoch and during the Valdai (Weichselian) Late Glacial (Alleröd and Younger Dryas).
Źródło:
Polish Geological Institute Special Papers; 2005, 16; 77--82
1507-9791
Pojawia się w:
Polish Geological Institute Special Papers
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of Polyurethane Solutions by Means of a Hard Depositor for Fiber Production by the Electrospinning Method
Modyfikacja roztworów poliuretanowych za pomocą mocnego depozytora do produkcji włókien metodą elektroprzędzenia
Autorzy:
Bokova, E. S.
Kovalenko, G. M.
Pawłowa, M.
Bokova, K. S.
Evsyukova, N. V.
Powiązania:
https://bibliotekanauki.pl/articles/233571.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
fibers electrospinning
polyurethane
polymer solutions processing
solutions modification
elektroprzędzenie włókien
poliuretan
przetwarzanie roztworów polimerowych
modyfikacja rozwiązań
Opis:
The article is devoted to fundamental and applied research in the field of the processing of polymer solutions. The purpose of this work was to identify the possibility of using modified solutions of polyurethanes for processing by electrospinning, and also to study the impact of the composition of the moulding solution on the structure and properties of fibrous materials. Nonwoven materials were obtained by electrospinning fibers from PUR solutions using NanospiderTM technology. The transfer of solutions into a metastable state, both inthe case of film systems and fibers, leads to a change in the structure of the material: porosity and fiber diameter.
W artykule skupiono się na podstawowych badaniach z zakresu przetwarzania roztworów polimerowych. Celem pracy było określenie możliwości zastosowania zmodyfikowanych roztworów poliuretanów do przetwarzania metodą elektroprzędzenia, a także zbadanie wpływu składu roztworu do formowania na strukturę i właściwości materiałów włóknistych. Włókniny otrzymano przez elektroprzędzenie włókien z roztworów PUR z wykorzystaniem technologii NanospiderTM. Przeniesienie roztworów do stanu metastabilnego, zarówno w przypadku systemów foliowych, jak i włókien, prowadzilo do zmiany struktury materiału: porowatości i średnicy włókna.
Źródło:
Fibres & Textiles in Eastern Europe; 2018, 6 (132); 63-67
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Obtaining New Biopolymer Materials by Electrospinning
Technologia elektroprzędzenia jako perspektywiczna metoda wytwarzania włóknin z biopolimerów
Autorzy:
Bokova, E. S.
Kovalenko, G. M.
Filatov, I. Y.
Pawłowa, M.
Stezhka, K. S.
Powiązania:
https://bibliotekanauki.pl/articles/233909.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
electrospinning of fibres
collagen hydrolyzate
biopolymer materials
chitosan
elektroprzędzenie włókien
hydrolizat kolagenu
materiały biopolimerowe
chitozan
Opis:
The paper covers aspects of the technology of fibre electrospinning for the production of nonwoven fabrics for various application areas. The conditions of forming nano- and microfibres from solutions of collagen hydrolyzate and dibutyrylchitine were studied as well as polymer-polymer complexes based on polyacrylic acid, polyvinyl alcohol and polyethylene oxide. A comparative analysis of different methods of electrospinning – electrocapillary, electric and NanospiderTM , was conducted. Promising application areas of non-woven fabrics in medicine sanitation as well as for clothing and footwear production are shown.
W artykule przedstawiono aspekty technologii elektroprzędzenia włókien do produkcji włóknin różnego przeznaczenia. Zbadano warunki formowania nano- i mikrowłókien z roztworów hydrolizatu kolagenu, dibutyrylchitinu jak również kompleksów polimer-polimer na bazie kwasu poliakrylowego, alkoholu poliwinylowego i tlenku polietylenu. Przeprowadzono analizę porównawczą różnych metod elektroformowania – elektrokapilarnej, elektroodśrodkowej i Nanospider TM metody. Przedstawiono perspektywiczne obszary zastosowania włóknin w medycynie oraz produkcji obuwia i odzieży.
Źródło:
Fibres & Textiles in Eastern Europe; 2017, 6 (126); 31-33
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Agar-agar a promising edible coating agent for management of postharvest diseases and improving banana fruit quality
Autorzy:
Ziedan, E.S.H.
El Zahaby, H.M.
Maswada, H.F.
Zoeir, H.A.
Powiązania:
https://bibliotekanauki.pl/articles/66110.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
banana
Musa
fruit
storage
fruit disease
fungi
agar
edible coating
postharvest disease
Opis:
This study was executed to investigate the potential of agar-agar, a nontoxic and non-degradable gelling agent, as a promising coating agent to improve and protect banana fruit against fungal postharvest diseases i.e., crown, finger, neck and flower end rots which are caused by fungal isolates of Colletotrichum musae and Fusarium moniliforme. Coated-banana fruit samples with different concentrations of agar-agar suspension particularly at 2.0 g · l−1 exhibited a significant reduction in incidence and severity of postharvest diseases compared to untreated fruit. Banana fruits dipped in agar suspension at 2.0 g · l−1 for 5, 10 and 15 min showed significant reduction in disease incidence and severity. Moreover, application of agar suspension as a coating agent at 2.0 g · l−1 significantly decreased weight loss (%), firmness loss (%), and soluble solid concentration of banana fruit for 15 days at 25 ± 2°C. Scanning electron microscopy observation confirmed that the fruit coated with agar colloid at 2.0 g · l−1 had significantly fewer cracks and showed smoother surfaces than untreated fruit. This explains the quality improvement in agar-coated fruit compared to uncoated fruit. Overall, agar colloid, a safe coating agent, could be used to protect banana fruit against postharvest rot diseases and extend fruit storage life during ripening and storage.
Źródło:
Journal of Plant Protection Research; 2018, 58, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
La$\text{}_{0.7}$Sr$\text{}_{0.3}$MnO$\text{}_{3}$ Thin-Film Grain-Boundary Junctions on a Bi-Crystal Substrate
Autorzy:
Gierłowski, P.
Szewczyk, A.
Abal'oshev, A. V.
Vlakhov, E. S.
Donchev, T. I.
Blagoev, B.
Powiązania:
https://bibliotekanauki.pl/articles/2041462.pdf
Data publikacji:
2004-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.47.Gk
72.25.Mk
Opis:
Transport properties of 10μm to 30μm wide grain-boundary junctions ion-etched in thin colossal magnetoresistance La$\text{}_{0. 7}$Sr$\text{}_{0.3}$MnO$\text{}_{3}$ films deposited on a SrTiO$\text{}_{3}$ bi-crystal were investigated. We have measured the current-voltage characteristics in the temperature range from 4.2 K to 300 K without applied magnetic field, as well as the magnetoresistance at magnetic fields up to±10 kOe directed parallel to the film surface, both perpendicular and parallel to the direction of current flow through the junctions. The investigated junctions have nonlinear current-voltage characteristics in this temperature range and consist of several magnetic domains. The maximum magnetoresistance (R(H)-R $\text{}_{max}$)/R$\text{}_{max}$, measured at 1 kOe was -17.6% at 4.1 K.
Źródło:
Acta Physica Polonica A; 2004, 106, 5; 715-719
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of nanoatrazine in post-emergent control of the tolerant weed Digitaria insularis
Autorzy:
Sousa, B.T.
Pereira, A.E.S.
Fraceto, L.F.
De Oliveira, H.C.
Dalazen, G.
Powiązania:
https://bibliotekanauki.pl/articles/2082785.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
atrazine
chemical control
nanoherbicide
nanotechnology
sourgrass
tolerant
weed control
Opis:
Digitaria insularis (sourgrass) is a monocotyledon weed of difficult control and high in- vasive behavior. Atrazine is widely applied in the Americas to control weeds in maize cul- ture, but its efficiency against D. insularis is limited. The incorporation of atrazine into poly(epsilon-caprolactone) nanocapsules increased the herbicidal activity against suscep- tible weeds; however, the potential of this nanoformulation to control atrazine-tolerant weeds including D. insularis has not yet been tested. Here, we evaluated the post-emergent herbicidal activity of nanoatrazine against D. insularis plants during initial developmental stages. The study was carried out in a greenhouse, using pots filled with clay soil. Plants with two or four expanded leaves were treated with conventional or nanoencapsulated at- razine at 50 or 100% of the recommended dosage (1,000 or 2,000 g ∙ ha −1 ), followed by the evaluation of physiological, growth, and control parameters of the plants. Compared with conventional herbicide, both dosages of nanoatrazine induced greater and faster inhibition of D. insularis photosystem II activity at both developmental stages. Atrazine nanoencap- sulation also improved the control of D. insularis plants, especially in the stage with two expanded leaves. In addition, nanoatrazine led to higher decreases of dry weight of four- leaved plants than atrazine. The use of the half-dosage of nanoatrazine was equally or more efficient in affecting most of the evaluated parameters than the conventional formulation at full dosage. Overall, these results suggest that the nanoencapsulation of atrazine potenti- ated its post-emergent herbicidal activity against D. insularis plants at initial developmental stages, favoring the control of this atrazine-tolerant weed.
Źródło:
Journal of Plant Protection Research; 2020, 60, 2; 185-192
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interpolymer Complexes as Modifying Compounds for Reducing Cotton Blended Fabric Flammability
Układy wykończeniowe do tekstyliów bawełnianych poprawiające ich odporność na palenie
Autorzy:
Bokova, E. S.
Kovalenko, G. M.
Woźniak, B.
Pawłowa, M.
Bokova, K. S.
Grzesiak, E.
Powiązania:
https://bibliotekanauki.pl/articles/232840.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
textiles
interpolymer complexes
oxygen index
fire safety
laying the grain
tekstylia
włókno bawełniane
kwas poliakrylowy
polimery niejonowe
indeks tlenowy
bezpieczeństwo pożarowe
Opis:
In this study modifying compounds on the basis of interpolymer complexes (IPC) of polyacrylic acid with nonionic polymers (polyvinyl alcohol, polyethylene oxide, polyacrylamide) were obtained. The conditions for formation of polymer-polymer complexes in aqueous media were studied. The method of impregnation of cotton blended fabrics with different surface mass of compositions based on interpolymer complexes of stoichiometric and non-stoichiometric composition is presented. The possibility of adjusting the gain of IPC in tissue structure was also determined. The impact of IPC was proved to increase the oxygen index of tissues, reducing their flammability, with an almost complete reduction of the self-combustion time.
Przedstawiono wyniki badań kompozycji wykończeniowych opartych na kwasach poliakrylowych i polimerów niejonowych (alkoholu winylowego, poliakryloamidu). Badano warunki formowania układów polimer-polimer oraz możliwości wprowadzania ich w strukturę włókna bawełnianego. Stwierdzono, że związki te podwyższają indeks tlenowy oraz redukują czas palenia.
Źródło:
Fibres & Textiles in Eastern Europe; 2016, 6 (120); 157-160
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical inferences in material selection of a polymer matrix for natural fiber composites
Wnioskowanie statystyczne w wyborze materiału osnowy polimerowej kompozytów z włóknami naturalnymi
Autorzy:
Noryani, M.
Sapuan, M. S.
Mastura, M. T.
Zuhri, M. M. Y.
Zainudin, E. S.
Powiązania:
https://bibliotekanauki.pl/articles/947395.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
material selection
polymer matrix
stepwise regression
hypothesis testing
confidence interval
wybór materiału
osnowa polimerowa
regresja krokowa
testowanie hipotez
przedział ufności
Opis:
In this paper, statistical inferences in material selection of polymer matrix for natural fiber composite are presented. Hypothesis testing and confidence interval were used to evaluate the suitability of the sample for use as a matrix in natural fiber reinforced composites. The screening process for material selection was carried out using a stepwise regression method. Then, the ranking process in material selection was conducted using an estimation of performance score (PS) for mechanical properties such as impact strength (IS), elongation at break (E) and tensile strength (TS). Ten types of polymer were involved in the study. The final selection revealed that polyamide (PA6), polyurethanes (PUR) and polypropylene (PP) are the potential candidates to manufacture hand-brake levers according to IS, E and TS, respectively. Here, it was found that the score for Tp (thermoplastic) is better than Ts (thermoset) in terms of IS. In contrast, the Ts offered a better score result than, Tp, with respect to E and TS. The results of statistical measurements using statistical modelling prove that the data analysis can be used as a part of the decision making in material selection.
Opisano wnioskowanie statystyczne dotyczące wyboru materiału osnowy polimerowej kompozytu z włóknami naturalnymi. Testy hipotez statystycznych i przyjęte przedziały ufności służyły do oceny próbki pod względem przydatności do zastosowania w charakterze osnowy polimerowej w kompozycie wzmocnionym włóknem naturalnym. Selekcji materiałów dokonano przy użyciu metody regresji krokowej, następnie uszeregowano wybrane materiały z wykorzystaniem rankingu oceny (PS) właściwości mechanicznych, takich jak: udarność (IS), wydłużenie przy zerwaniu (E) i wytrzymałość na rozciąganie (TS). Wyselekcjonowano wstępnie 10 rodzajów polimerów zaliczanych do grup polimerów termoplastycznych (Tp) i termoutwardzalnych (Ts). Wnioskowanie statystyczne wykazało, że poliamid (PA6), poliuretany (PUR) i polipropylen (PP) są potencjalnie korzystnymi osnowami polimerowymi do wytwarzania dźwigni hamulca ręcznego. Stwierdzono, że polimery z grupy Tp wykazują lepszą udarność niż polimery z grupy Ts. Natomiast materiały Ts charakteryzują korzystniejsze wartości wydłużenia przy zerwaniu i wytrzymałości na rozciąganie niż ich odpowiedniki z grupy Tp. Wyniki przeprowadzonej analizy danych z zastosowaniem modelowania statystycznego dowodzą, że metoda ta może być pomocna przy wyborze materiału odpowiedniego do planowanej aplikacji.
Źródło:
Polimery; 2020, 65, 2; 105-114
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response of salt-stressed common bean plant performances to foliar application of phosphorus (MAP)
Autorzy:
Rady, M.M.
El-Shewy, A.A.
Seif El-Yazal, M.A.
Abdelaal, K.E.S.
Powiązania:
https://bibliotekanauki.pl/articles/11418.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2018, 72
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Żydzi i Żydówki jako podmioty postkolonialne w świetle dążeń emancypacyjnych kobiet w Galicji (1890–1914)
Autorzy:
k, Angelique L e s z c z a w s k i-S c h w e r
Powiązania:
https://bibliotekanauki.pl/articles/702031.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Źródło:
Historyka studia metodologiczne; 2012, 42
0073-277X
Pojawia się w:
Historyka studia metodologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Między Scyllą determinizmu a Charybdą niepewności: spotkania klimatologów z historykami i archeologami średniowiecznego Bliskiego Wschodu
Autorzy:
i, Adam I z d e b s k
Powiązania:
https://bibliotekanauki.pl/articles/701997.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Źródło:
Historyka studia metodologiczne; 2013, 43
0073-277X
Pojawia się w:
Historyka studia metodologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Towards Attosecond Pulses with High Harmonics
Autorzy:
Agostini, P.
Paul, P. M.
Breger, P.
Toma, E. S.
Muller, H. G.
Mullot, G.
Augé, F.
Balcou, Ph.
Powiązania:
https://bibliotekanauki.pl/articles/2030463.pdf
Data publikacji:
2002-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Re
42.65.Ky
32.80.Rm
33.60.Cv
Opis:
The high harmonics produced by focusing an intense femtosecond laser in a gas are theoretically shown to be locked in phase. The physics of this locking is discussed and a new method based on quantum interference in two-photon, two-color ionization allowing to retrieve the relative phase of harmonic pairs is described. The main result is that the 5 harmonics of orders 11-19 produced in argon generate a train of subfemtosecond pulses with a period of 1.35 fs and a duration of 250 attoseconds.
Źródło:
Acta Physica Polonica A; 2002, 101, 3; 313-324
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mycoparasitic nature of Bionectria sp. strain 6.21
Autorzy:
Soares de Melo, I.
Montes Peral Valente, A.M.
Kavamura, V.N.
Dias Vilela, E.S.
Faull, J.L.
Powiązania:
https://bibliotekanauki.pl/articles/66229.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
In this study, a Bionectria sp. strain isolated from citrus rhizosphere was evaluated for its potential in inhibiting the growth of Rhizoctonia solani and Pythium aphanidermatum. It was demonstrated that Bionectria sp. 6.21 inhibited the growth of P. aphanidermatum and R. solani. In dual cultures, however, the antagonist only parasitised R. solani. Regarding the assay involving P. aphanidermatum, a lack of mycoparasitic ability was demonstrated. Crude extract of Bionectria completely inhibited the mycelial growth of both fungi. It appears that the main mechanism involved in the antagonism of Pythium by Bionectria is through antibiotic production. The antagonistic fungus released extracellular secondary metabolites. The metabolites were found to be inhibitory to both plant pathogenic fungi. From the crude extract, eleven fractions were obtained and tested for their antifungal properties. Two of them showed very strong activity against P. aphanidermatum. The obtained results indicated that this biocontrol agent has both antibiotic and mycoparasitic properties. On the other hand, evidence obtained from Scanning Electron Microscopy (SEM) suggests the involvement of an enzymatic process, with enzymatic digestion playing a major role in the parasitism of Bionectria sp. 6.21. In conclusion, these results provide evidence that mainly due to mycoparasitism, this strain has the potential to become a good candidate for biological control.
Źródło:
Journal of Plant Protection Research; 2014, 54, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrometallurgical treatment of non-sulfide zinc ore for precipitation of zinc oxide nanoparticles
Autorzy:
Abdel-Aal, E.-S. A.
Rashad, M. M.
El-Shazly, A. N.
Ibrahim, I. A.
El-Shahat, M. F.
Powiązania:
https://bibliotekanauki.pl/articles/110748.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
zinc ore
sulfuric acid leaching
filtration rate
zinc sulfate
zinc oxide nanoparticles
MB photocatalytic degradation
Opis:
Acid leaching of Egyptian zinc ore from the Um Gheig area was carried out with sulfuric acid. This study determines the optimum conditions for dissolution of non-sulfide zinc ore. The optimum conditions are 25% -74m particle size, 45 °C temperature, 2 h leaching time, 1.1 stoichiometric molar ratio of H2SO4 to Zn, 1:3 solid/liquid ratio. The maximum filtration rate is 1.6 Mg Zn•m-2•day-1at pressure difference of 0.80 bar. The zinc recovery is about 90%. As the zinc ore contains zinc silicate, some additives were tested to enhance filtration and prevent formation of silica gel. To increase the added value of the product, zinc oxide was precipitated by a co-precipitation method in a nanosize powder with average particle size ~ 20 nm. Photocatalytic degradation of methylene blue dye under UV light using ZnO nanopowders produced at different conditions was investigated. Photocatalytic efficiency with methylene blue (MB) concentration was reduced as much as 85% in 240 min with the produced nanoparticles.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 2; 729-737
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical and electrical properties of acrylonitrile-butadiene rubber filled with crosslinked polystyrene prepared by emulsion polymerization
Mechaniczne i elektryczne właściwości kauczuku akrylonitrylo-butadienowego napełnionego usieciowanym polistyrenem otrzymywanym w procesie polimeryzacji emulsyjnej
Autorzy:
Rozik, N. N.
El-Hamouly, S. H.
Shafik, E. S.
Younan, A. F.
Abd-El Messieh, S. L.
Powiązania:
https://bibliotekanauki.pl/articles/947026.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
acrylonitryle-butadiene rubber
emulsion polymerization
crosslinked polystyrene
mechanical properties NBR composites
electrical properties NBR composites
kauczuk akrylonitrylo-butadienowy
polimeryzacja emulsyjna
usieciowany polistyren
mechaniczne właściwości kompozytów NBR
elektryczne właściwości kompozytów NBR
Opis:
In the present work, we have studied the effects of mixed emulsifier systems, sodium dodecyl sulphate (SDS — as anionic surfactant) and poly(oxyethylene) nonylphenyl ether (NP-30 — as non-ionic surfactant), on the emulsion polymerization of styrene. The crosslinked, monodispersed polystyrene (PS) particles were synthesized with a variable divinylbenzene (DVB) concentration as cross-linking agent. The crosslinked polystyrene was incorporated into acrylonitrile-butadiene rubber (NBR). The mechanical and electrical properties were determined using carbon black as a conductive filler and silica as non conductive filler.
Badano wpływ anionowych (SDS) i niejonowych (NP-30) środków powierzchniowo czynnych na przebieg polimeryzacji emulsyjnej styrenu. Syntezowany monodyspersyjny polistyren (PS) sieciowano przy użyciu różnej ilości diwinylobenzenu (DVB). Cząstki usieciowanego PS wprowadzano do kauczuku akrylonitrylo-butadienowego (NBR). Wyznaczano właściwości mechaniczne wytworzonych kompozytów, a także porównywano właściwości elektryczne kompozytów zawierających dodatkowo napełniacz przewodzący w postaci cząstek sadzy lub — nieprzewodzący — w postaci cząstek krzemionki.
Źródło:
Polimery; 2015, 60, 1; 33-42
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphology and selected properties of kenaf fiber/cornhusk reinforced corn starch hybrid biocomposites
Struktura i wybrane właściwości hybrydowych biokompozytów skrobi kukurydzianej wzmocnionej włóknem kenaf i włóknem z łusek kukurydzy
Autorzy:
Hazrol, M. D.
Sapuan, S. M.
Ilyas, R. A.
Zainudin, E. S.
Zuhri, M. Y. M.
Abdul Wahab, N. I.
Powiązania:
https://bibliotekanauki.pl/articles/2202590.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
corn starch
cornhusk fiber
kenaf fiber
hybrid composite
biodegradable film
skrobia kukurydziana
włókno z łuski kukurydzy
włókno kenaf
kompozyt hybrydowy
folia biodegradowalna
Opis:
The study examined the effect of the cornhusk fibers (CHF) content on the structure, physical, mechanical and water barrier properties of composites obtained on the basis of corn starch (CS) and kenaf fiber (KF), used in the amount of 6 wt%. Sorbitol in the amount of 30 wt% was used as a plasticizer. Hybrid biocomposite films were obtained using the solution casting technique. The addition of CHF reduced the water absorption and solubility of the film in water. Increasing the CHF content in the composite resulted in greater film thickness, weight and density. Thanks to good biocompatibility (FESEM) the composites showed higher tensile strength and Young’s modulus. However, elongation at break was lower. FTIR results confirmed the intermolecular hydrogen bonding between the matrix and the fibers. The best properties were obtained at 6 wt% CHF content.
W pracy zbadano wpływ zawartości włókien z łusek kukurydzy (CHF) na strukturę, właściwości fizyczne, mechaniczne i barierowe dla wody kompozytów otrzymanych na bazie skrobi kukurydzianej (CS) i włókna kenaf (KF), stosowanego w ilości 6% mas. Jako plastyfikator użyto sorbitol w ilości 30% mas. Folie biokompozytów hybrydowych otrzymywano techniką odlewania z roztworu. Dodatek CHF zmniejszał absorpcję wody i rozpuszczalność folii w wodzie. Zwiększenie zawartości CHF w kompozycie skutkowało większą grubością, gramaturą i gęstością folii. Dzięki dobrej biozgodności (FESEM) kompozyty wykazały większą wytrzymałość na rozciąganie oraz moduł Younga. Jednak wydłużenie przy zerwaniu było mniejsze. Wyniki FTIR potwierdziły obecność międzycząsteczkowych wiązań wodorowych między osnową polimerową i włóknami. Najlepsze właściwości uzyskano przy zawartości 6% mas. CHF.
Źródło:
Polimery; 2022, 67, 11-12; 575--587
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carrier Diffusion in the Barrier Enabling Formation of Charged Excitons in InAs/GaAs Quantum Dots
Autorzy:
Karlsson, K. F.
Moskalenko, E. S.
Holtz, P. O.
Monemar, B.
Schoenfeld, W. V.
Garcia, J. M.
Petroff, P. M.
Powiązania:
https://bibliotekanauki.pl/articles/2028833.pdf
Data publikacji:
2001-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.67.Hc
71.35.-y
78.55.Cr
Opis:
It is demonstrated that the photoluminescence spectra of single self-assembled quantum dots are very sensitive to the experimental conditions, such as excitation energy and crystal temperature. A qualitative explanation is given in terms of the effective diffusion of the photogenerated carriers, determined by the experimental conditions, which influence the capture probability and hence also the charge state of the quantum dots. This is proposed as a new tool to populate quantum dots with extra electrons in order to study phenomena involving charged excitons.
Źródło:
Acta Physica Polonica A; 2001, 100, 3; 387-395
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-Field Magnetoresistance in Manganite Thin Films
Autorzy:
Vlakhov, E. S.
Dörr, K.-H
Müller, K.
Handstein, A.
Nenkov, K.
Walter, T.
Chakalov, R. A.
Chakalova, R. I.
Spasov, A. Y.
Powiązania:
https://bibliotekanauki.pl/articles/2013419.pdf
Data publikacji:
2000-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Ak
73.50.Dn
Opis:
Grain boundaries play an important role in low-field magnetoresistance of La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ and La$\text{}_{0.7}$Sr$\text{}_{0.3}$MnO$\text{}_{3}$ thin films deposited by magnetron sputtering and pulsed laser deposition on YSZ(100) and silicon substrates buffered by YSZ. Well-pronounced low-field magnetoresistance hysteresis was observed in magnetic fields applied in in-plane and out-of-plane directions. High values of local magnetoresistance sensitivity d(MR)/dH in the vicinity of the coercive field were obtained reaching up to 0.2%/Oe for La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ samples at 5 K.zapis
Źródło:
Acta Physica Polonica A; 2000, 97, 5; 787-790
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tunnel Current Features Caused by Defect Assisted Process in Resonant-Tunnelling Structures
Autorzy:
Belyaev, A. E.
Vitusevich, S. A.
Glavin, B. A.
Konakova, R. V.
Dobrowolski, W.
Mąkosa, A.
Kravchenko, L. N.
Gornev, E. S.
Powiązania:
https://bibliotekanauki.pl/articles/1947897.pdf
Data publikacji:
1996-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Gk
85.30.Mn
Opis:
An extra channel of electron tunnelling through a double-barrier resonant-tunnelling GaAs/AlGaAs heterostructure caused by impurity assisted tunnelling was identified. We argue that it is due to DX centres associated with dopant donor atoms which diffused into the AlGaAs barrier layer.
Źródło:
Acta Physica Polonica A; 1996, 90, 4; 727-730
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tubing decontamination during the leak test of iodine-125 seeds
Autorzy:
Moura, J. A.
Moura, E. S.
Sprenger, F. E.
Nagatomi, H. R.
Zeituni, C. A.
Feher, A.
Manzoli, J. E.
Souza, C. D.
Rostelato, M. E.
Powiązania:
https://bibliotekanauki.pl/articles/148765.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
brachytherapy
iodine seeds
leak test
sealed radioactive sources
Opis:
Leak tests were made to detect any leakage of radioactive material from inside the iodine-125 seeds applied in brachytherapy. These seeds are used in prostate cancer treatment. In the quality control routine, during seed production, leak tests are performed according to the International Standard Organization – radiation protection – sealed radioactive sources – ISO-9978 standard, and require liquid transfer between recipients. Any leakage causes contamination of the liquid and tubes. The aim of this study is the establishment of decontamination routines for tubes, allowing their repeated use, in the automated assay process.
Źródło:
Nukleonika; 2010, 55, 3; 409-413
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development and production of radioactive sources used for cancer treatment in Brazil
Autorzy:
Rostelato, M. E. C. M.
Rela, P. R.
Zeituni, C. A.
Feher, A.
Manzoli, J. E.
Moura, J. A.
Moura, E. S.
Silva, C. P. G.
Powiązania:
https://bibliotekanauki.pl/articles/148305.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radioactive sources production
iodine-125 seeds
iridium-192 wires
brachytherapy
cancer treatment
Opis:
The number of cancer patients in Brazil is increasing and part of the patients are submitted to brachytherapy treatment using iridium-192 wire and iodine-125 radioactive seeds. The Nuclear Energy Research Institute established a programme to produce iridium-192 wire and iodine-125 radioactive seeds. With the purpose of settling a laboratory for iridium-192 sources production, a wire activation method was developed and a hot cell for the wire manipulation, quality assurance and packaging was built. The iodine-125 seeds consist of a welded titanium capsule containing iodine-125 adsorbed onto a silver rod. Concerning the setup of the local production, the following activities were carried out: superficial treatment of the silver rod, development of a process to absorb the iodine in the silver rod, welding methodology to seal the seeds, leakage and contamination test and source activity measurement.
Źródło:
Nukleonika; 2008, 53, suppl. 2; 99-103
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tunnelling of Direct and Indirect Excitons in Slightly Asymmetric Double Quantum Wells
Autorzy:
Mazurenko, D. A.
Akimov, A. V.
Moskalenko, E. S.
Zhmodikov, A. L.
Kaplyanskii, A. A.
Challis, L. J.
Cheng, T. S.
Foxon, C. T.
Powiązania:
https://bibliotekanauki.pl/articles/1952066.pdf
Data publikacji:
1996-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.20.Dx
63.20.Kr
Opis:
We report the first studies of luminescence spectra from asymmetric double quantum wells of GaAs with widths around 100 Å differing by only one (2.8 Å) or two monolayers. Studies of the position and intensity of the direct and indirect exciton lines suggest the existence of acoustic phonon-assisted tunnelling between exciton states separated by a few meV. At temperatures 10-20 K the electron tunnelling process is fast enough to maintain thermal equilibrium between these direct and indirect excitons which are connected with holes in the same quantum well.
Źródło:
Acta Physica Polonica A; 1996, 90, 5; 895-898
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Degradation and physical properties of sugar palm starch/ sugar palm nanofibrillated cellulose bionanocomposite
Degradacja i właściwości fizyczne bionanokompozytów skrobi palmy cukrowej wzmocnionej nanowłóknami celulozowymi tej palmy
Autorzy:
Atikah, M. S. N.
Ilyas, R. A.
Sapuan, S. M.
Ishak, M. R.
Zainudin, E. S.
Ibrahim, R.
Atiqah, A.
Ansari, M. N. M.
Jumaidin, R.
Powiązania:
https://bibliotekanauki.pl/articles/947563.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
sugar palm
high pressurized homogenizer
nanofibrillated cellulose
nanocomposites
soil burial degradation
palma cukrowa
homogenizacja wysokociśnieniowa
nanowłóknista celuloza
nanokompozyty
degradacja w glebie
Opis:
This paper aims to study the degradation rate of sugar palm nanofibrillated cellulose (SPNFCs) and sugar palm starch (SPS). SPNFCs were isolated from sugar palm fiber, while SPS is extracted from sugar palm trunk. The SPNFCs were reinforced with SPS biopolymer as biodegradable reinforcement materials of different diameter/length based on the number of passes of high pressurize homogenization process (5, 10 and 15 passes represented by SPS/SPNFCs-5, SPS/SPNFCs-10, and SPS/SPNFCs-15). These SPNFCs were incorporated into SPS plasticized with glycerol and sorbitol via solution casting method. Soil burial experiment performed on SPS and SPS/SPNFCs bionanocomposites showed that SPS was degraded more rapidly by losing 85.76% of its mass in 9 days compared to 69.89% by SPS/SPNFCs-15 bionanocomposite. The high compatibility between SPNFCs nanofiber and SPS biopolymer matrices can be observed through field emission scanning electron microscopy (FE-SEM).
Zbadano szybkość degradacji nanowłóknistej celulozy wyizolowanej z palmy cukrowej (Arenga pinnata) (SPNFCs) oraz skrobi wydzielonej przez ekstrakcję z rdzenia pnia tej palmy (SPS). SPNFCs uzyskiwano z włókien palmy cukrowej, poddawanych homogenizacji pod wysokim ciśnieniem w 5, 10 lub 15 cyklach, otrzymując nanowłókna celulozy o różnej długości i średnicy. SPNFCs wprowadzano do SPS uplastycznionego mieszaniną (1 : 1) glicerolu isorbitolu. Metodą odlewania z roztworu wytwarzano błony nanokompozytowe SPS/SPNFCs-5, SPS/SPNFCs-10 i SPS/SPNFCs-15. Test glebowy procesu biodegradacji wykazał, że SPS ulegało szybszej degradacji, tracąc 85,76% swojej masy w ciągu 9 dni, w porównaniu z ubytkiem masy 69,89% w wypadku bionanokompozytu SPS/SPNFCs-15. Na podstawie analizy metodą skaningowej mikroskopii elektronowej z emisją polową (FE-SEM) stwierdzono dużą kompatybilność między nanowłóknami SPNFCs i biopolimerową osnową SPS.
Źródło:
Polimery; 2019, 64, 10; 680-689
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of microcystin producing cyanobacteria in the Svisloch River, Belarus
wpisac
Autorzy:
Mikheyeva, T.M.
Belykh, O.
Sorokovikova, E.G.
Gladkikh, A.S.
Luk'yanova, E.V.
Potapov, S.A.
Tikhonova, I.V.
Fedorova, G.A.
Korneva, E.S.
Kuzmin, A.V.
Powiązania:
https://bibliotekanauki.pl/articles/85033.pdf
Data publikacji:
2012
Wydawca:
Akademia Pomorska w Słupsku
Opis:
Comprehensive investigations of the Svisloch River phytoplankton were performed in 2006-2010. Samples were taken all-the-year-round at four sites: reservoirs Drozdy and Lake Komsomolskoye, sites along Vaneyev and Aranskaya streets (within the Minsk municipal section of the river). Species diversity of planktonic cyanobacteria and their contribution to phytoplankton abundance and biomass were determined. Potentially toxic cyanobacteria were detected based on the results of molecular-phylogenetic analysis. They contained a microcystin synthesis gene (mcyE). Obtained sequences belonged to the Microcystis and Anabaena genera, which were the most common in reservoirs worldwide and the most frequent agents of blooms. Several types of microcystins and a nontoxic peptide Oscillamide Y were detected in phytoplankton samples by means of LC/MS
В течение 2006-2010 гг. проводилось комплексное исследование фитопланктона р. Свислочь. Пробы отбирались круглогодично на четырех станциях в черте г. Минска: в зарегулированных водохранилищах Дрозды и Комсомольское озеро и на речных уча- стках в районе улиц Ванеева и Аранская. С помощью световой микроскопии определен видовой состав планктонных цианобактерий, оценен их вклад в численность и биомас- су фитопланктона. В результате молекулярно-филогенетических исследований выявле- ны потенциально токсичные цианобактерии, содержащие ген синтеза микроцистина (mcyE). Полученные последовательности принадлежат представителям родов Microcystis и Anabaena (= subg. Dolichospermum), которые широко распространены в водоемах мира и являются частыми возбудителями токсичных цветений. Несколько типов мик- роцистинов и нетоксичный пептид осцилламид Y были детектированы в пробах фито- планктона с помощью ВЭЖХ-МС.
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2012, 16
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Leakage test evaluation used for qualification of iodine-125 seeds sealing
Autorzy:
Feher, A.
Rostelato, M. E. C. M.
Zeituni, C. A.
Calvo, W. A. P.
Somessari, S. L.
Moura, J. A.
Moura, E. S.
Souza, C. D.
Rela, P. R.
Powiązania:
https://bibliotekanauki.pl/articles/147662.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
leakage test
iodine-125 seeds
prostate cancer
brachytherapy
titanium tube
standard ISO-9978
Opis:
Brachytherapy is one of the possible treatments with ionizing radiation available for prostate cancer, in which small seeds containing iodine-125 radioisotope are implanted directly into the prostate. The seed consists of a sealed titanium tube containing a central silver wire with adsorbed iodine-125. The tube sealing is made with titanium at the ends, using plasma arc-welding (PAW) or laser process. This sealing must be leakage-resistant and free of cracks, therefore avoiding iodine-125 to deposit in the silver wire to escape and spread into the human body. To ensure that this problem is not occurring, rigorous leakage tests in accordance with the standard ISO-9978 should be applied. The aim of this study is to determine, implement and evaluate the leakage test to be used in the iodine-125 seeds production, in order to qualify the sealing procedure. The standard ISO-9978 presents a list of tests to be carried out according to the type of source. The preferential methods for brachytherapy sources are soaking and helium. To assess the seeds leakage, the method of immersion test at room temperature was applied. The seeds are considered leakage-free if the detected activity does not exceed 185 Bq (5 nCi). An iodine standard was prepared and its value determined in a sodium iodide detector. A liquid scintillation counter was calibrated with the standard for seed leakage tests. Forty-eight seeds were plasma arc-welded for these tests.
Źródło:
Nukleonika; 2011, 56, 4; 375-379
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Initial Public Offerings: Is There Money Left on the Table? Comparative Study of the Top Five IPOs in Poland and the United States
Autorzy:
C, Nikola M A K O J E V I
C, Nikola S T E F A N O V I
C, Petar V E S E L I N OV I
Powiązania:
https://bibliotekanauki.pl/articles/701812.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Źródło:
Ekonomista; 2014, 4
0013-3205
2299-6184
Pojawia się w:
Ekonomista
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problemi di traduzione sull’esempio della versione polacca ed inglese di Se una notte d’inverno un viaggiatore di Italo Calvino
Autorzy:
y, M a g d a l e n a O l e k s
Powiązania:
https://bibliotekanauki.pl/articles/702294.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Źródło:
Kwartalnik Neofilologiczny; 2015, 2
0023-5911
Pojawia się w:
Kwartalnik Neofilologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł

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