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Tytuł:
Precision machining of spherical ceramic parts
Precyzyjna obróbka ceramicznych elementów kulistych
Autorzy:
Gawlik, J.
Krajewska, J.
Niemczewska-Wójcik, M.
Powiązania:
https://bibliotekanauki.pl/articles/175636.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
zirconium
sapphire
precision machining
surface geometric structure
cyrkon
szafir
obróbka precyzyjna
struktura geometryczna powierzchni
Opis:
Physical and mechanical properties of ceramic materials make them useful applications in both mechanical and medical engineering. This paper presents the technological system for precision machining of super hard ceramic materials. As an example of precisely processed ceramic components a circular / spherical element can be given, which was used in an endoprosthesis hip replacement. This paper presents selected characteristics of geometrical surface structure after precision machining and finishing and indicates directions for further research into the development of the technological qualities of ceramic components.
Materiały ceramiczne charakteryzują się właściwościami fizycznymi i mechanicznymi determinującymi ich zastosowanie zarówno w budowie maszyn, jak również w medycynie. W pracy przedstawiono system technologiczny do precyzyjnej obróbki trudnoobrabialnych materiałów ceramicznych. Podano przykłady elementów kulistych do zastosowania na endoprotezy stawu biodrowego. Określono wybrane charakterystyki struktury geometrycznej ich powierzchni po obróbce kształtującej i wykończeniowej. Wskazano kierunki dalszych badań z zakresu kształtowania jakości technologicznej elementów z materiałów ceramicznych.
Źródło:
Advances in Manufacturing Science and Technology; 2013, 37, 4; 19-30
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuel fractions obtained in the recycling of plastics
Autorzy:
Sokołowski, J.
Rokicki, G.
Marczewski, M.
Krajewska, J.
Powiązania:
https://bibliotekanauki.pl/articles/777943.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
recykling tworzyw sztucznych
kraking katalityczny
plastic recycling
catalytic cracking
Opis:
The decomposition of mixtures of polystyrene, polyethylene, and motor oil was studied at 470 - 510°C in a flow-through setup supplied with a fluidized bed reactor and a cascade of receivers. The aim of the work was to determine the role of the fluidized bed in the reactor, in the process of degradation of plastics in the cases where it was only a carrier of heat for the endothermal process of pyrolysis or it was both a carrier of heat and a catalytic bed for the process. The effect of the catalyst granulation and of the method of the organization of work in the reactor on the yield of the process and on the composition of the products obtained, was also studied. In the cases where Al2O3 of granulation 0.2 mm was used as a fluidized bed catalyst the liquid products of the decomposition of the polymers contained mainly alkyl-aromatic derivatives of styrene, benzene and alkane hydrocarbons. If nano-Al2O3 was used as a catalyst and it was introduced into the reactor with a stream of raw materials, the obtained products were solids, composed mostly of styrene and alkene hydrocarbons.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 3; 46-50
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of tool composite’s structure during process of diamond grinding of ceramic materials
Autorzy:
Gawlik, J.
Niemczewska-Wójcik, M.
Krajewska, J.
Sokhan, S. V.
Paščenko, E. A.
Žuk, T. S.
Powiązania:
https://bibliotekanauki.pl/articles/407111.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ceramic materials
modified diamond tools
surface geometric structure
Opis:
This paper presents the results of the tests performed during the grinding process of the ceramic materials: - polycrystalline ceramics (Zirconium ZrO2) and mono-crystalline ceramics (sapphire -Al2O3) by the diamond tools. Studies have shown that the concentration (thickening) of the tool composite changes the tool’s pore structure when using suitable wetted adamantine additives. Such modified composite has positive impact on tribological properties of the subsurface layer of the machined components. This is manifested by the reduction of the surface roughness and reduction of the vibration amplitude of the coefficient of friction. The possibilities of the positive effects when using wetted additives on the tool’s composite during the pressing (briquetting) stage confirm the study results.
Źródło:
Management and Production Engineering Review; 2014, 5, 4; 9-17
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transport of biogenic substances in watercourses of Coastal Landscape Park
Autorzy:
Krajewska, Z.
Fac-Beneda, J.
Powiązania:
https://bibliotekanauki.pl/articles/961383.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
biogenic substance
transport
watercourse
Coastal Landscape Park
total phosphorus
total nitrogen
water flow
load
flow
Opis:
Eutrophication of the Baltic Sea is a serious problem, and as such it is frequently raised in relevant literature, where potamic supply of nutrients is implicated as one of the causes. Coastal waters like the Puck Lagoon, an area protected within the Natura 2000 network, as well as watercourses in adjacent Coastal Landscape Park, are particularly vulnerable to such degradation. Hence, the aim of our study, which was to determine the volume and fluctuations of transported total nitrogen and phosphorus. Another objective was to try and relate these changes to the transport of nutrients and runoff in streams flowing through Coastal Landscape Park into the Puck Lagoon (the Płutnica, Potok Błądzikowski, Gizdepka, Reda, Zagórska Struga) and into the Baltic Sea (the Piaśnica, Karwianka, Czarna Wda). This research drew on field investigations and laboratory assays performed in the hydrological year of 2009, and had been designed accordingly, including measurements of the flow rate in the selected watercourses and water sampling for further chemical analyses, including determinations of total nitrogen and total phosphorus. In brief, the highest average annual flow rate and load of total nitrogen and total phosphorus were found in the Reda and Piaśnica. The largest load variation, of both nitrogen and phosphorus, occurred in the Zagórska Struga. In most of the watercourses, the load of biogenic substances was strongly correlated with the flow, but the actual power of correlation depended on a stream and biogenes. The strongest statistical relationships for both tested substances (r > 0.8) occurred in the Potok Błądzikowski, Reda, Zagórska Struga and Czarna Wda. The Płutnica was an exception in that there were no statistically significant relationships between the water flow and the load of nutrients. However, the low value of the relationship determined suggests that we should view that series with some caution.
Źródło:
Journal of Elementology; 2016, 21, 2
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the resistivity imaging results conducted over karst voids in Klucze using Depth of Investigation Index
Autorzy:
Krajewska, O.
Glazer, M.
Pierwoła, J.
Powiązania:
https://bibliotekanauki.pl/articles/100761.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Śląski. Wydział Nauk o Ziemi
Tematy:
jaskinia krasowa
Klucze
analiza
resistivity imaging
Depth of Investigation Index
Karst caves
Opis:
Conducted by "Olkusz" Speleological Club exploratory works related to the Gieńkówka cave led only to its partial opening. There are indications stating that this cave has continuation beyond its currently available parts. In order to verify those assumptions resistivity imaging method has been used. During analysis of the resistivity models obtained from field measurements the synthetic model, simulating the intersection of the cave corridor, has been utilized. In order to assess the reliability of resistivity cross sections in terms of the presence of artifacts left by the inversion process Depth of Investigation (DOI) index has been applied. For preparing DOI maps two inversions on the same data set were carried out using different reference models. Then the results were compared to each other. High resistivity anomalies revealed on obtained models show strong correlation with actual caves known in this area. In addition, similar anomalies have been found in place of the predicted continuity in Gieńkówka cave, thus confirming the hypothesis made in this research. High DOI index values in the occurrence of caves pointing to the instability of the inversion process in those areas.
Źródło:
Contemporary Trends in Geoscience; 2014, 3, 1; 14-23
2299-8179
Pojawia się w:
Contemporary Trends in Geoscience
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial concentration of businesses with foreign capital in the capital cities of the Polish voivodeships and their agglomerations from 1995-2016
Przestrzenna koncentracja firm z udziałem kapitału zagranicznego w miastach wojewódzkich Polski i ich aglomeracjach w latach 1995-2016
Autorzy:
Kisiel, R.
Krajewska, A.
Nazarczuk, J.M.
Powiązania:
https://bibliotekanauki.pl/articles/37363.pdf
Data publikacji:
2017
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Acta Scientiarum Polonorum. Oeconomia; 2017, 16, 4
1644-0757
Pojawia się w:
Acta Scientiarum Polonorum. Oeconomia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Perception of the elderly by junior high school students and university students in Poland
Autorzy:
Cybulski, M.
Krajewska-Kułak, E.
Jamiolkowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1917653.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Aging
social health
Students
Opis:
Introduction: Statistical data from the turn of the 20th century shows a significant increase in the average human life span and, what follows, an extension of old age. The world is aging and Poland has joined the list of countries which have been classified as demographically old since the rate at which society is aging has become very fast. Purpose: The aim of this thesis was to become familiar with the opinions submitted by respondents regarding aging and old age, health problems connected with aging and preferred health behaviors.Materials and methods: The research was conducted between January 3rd of 2013 and February 15th of 2014 on a group of 200 junior high school students and 200 university students from the Medical University of Białystok Faculty of Health Sciences using a questionnaire created by the authors.Results: A vast majority of the respondents of the study groups declared that they have thought about old age. Among university students this percentage reached 38.5%. Almost 50.0% of all respondents acknowledged that older people are needed by society.Conclusions: The results show that the aging process should be contemplated considering multiple aspects of life: biological, psychological and social. Moreover, youth education programs about seniors and old age as well as about ways to counteract their stigmatization should be introduced.
Źródło:
Progress in Health Sciences; 2015, 5, 2; 93-98
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Canthaxanthin in recent sediments as an indicator of heterocystous cyanobacteria in coastal waters
Autorzy:
Krajewska, M.
Szymczak-Zyla, M.
Kobos, J.
Witak, M.
Kowalewska, G.
Powiązania:
https://bibliotekanauki.pl/articles/47440.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Cyanoprokaryota
chlorophyll a
coastal water
carotenoid
chloropigment
canthaxanthin
Gdansk Gulf
Baltic Sea
recent sediment
Źródło:
Oceanologia; 2019, 61, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factors determining satisfaction of elderly peoples caregivers with the home care they provide
Autorzy:
Sierakowska, M.
Doroszkiewicz, H.
Markowska, A.
Lewko, J.
Krajewska-Kułak, E.
Powiązania:
https://bibliotekanauki.pl/articles/1916647.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Elderly caregiver
social support
satisfaction with care
Opis:
Introduction: Family is the basic institution providing informal care to elderly and disabled individuals. Purpose: To present care situations encountered by persons providing home care to an elder, the caregivers’ needs for support and the factors determining their satisfaction with the care they provide. Materials and methods: The study was conducted at the Geriatric Ward of the Hospital of the Ministry of Interior in Bialystok among 105 home caregivers of the elderly. A diagnostics survey was based on an original survey questionnaire and the COPE Index. Functional capacity in the elderly (N=100) was determined based on the Barthel ADL (activities' in daily living) Index and the category of nursing care (category, I-III). The analysis covered also the pressure sore risk assessment (the Norton Scale). Results: The analysis based on the Barthel ADL Index showed that over 30.0% of the elderly individuals were given up to 40 points in the nursing assessment (seriously disabled). Almost all patients – 97.0% qualified to the 3rd category of nursing care. 64.0% of the elderly had an increased risk of pressure sore development (the Norton Scale). The problems connected with providing home care listed by caregivers included the lack of time, disability of the elder and locomotion difficulties. The analysis based on the Cope Index showed a positive relationship between the caregiver’s age (r=0.216), education (r=0.196), the distance from the elder’s home (r=0.216), the quality of received support (r=0.554), and the satisfaction in the care provided. Conclusions: Caregivers reported the need for different forms of support. Higher education, longer distance from home and the quality of received support were significantly associated with higher satisfaction with caregiving.
Źródło:
Progress in Health Sciences; 2014, 4, 2; 82-87
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Awareness of risk factors of malaria as an element of primary prophylaxis
Autorzy:
Sarosiek, J.
Van Damme - Ostapowicz, K.
Harasim-Piszczatowska, E.
Krajewska-Kułak, E.
Powiązania:
https://bibliotekanauki.pl/articles/1917399.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Africa
prophylaxis
Malaria
Opis:
Introduction: Malaria is the most common tropical infectious disease caused by parasitic protozoa, affecting every year about 220 million of people with about 1-3 million deaths. It is known that every 30 seconds one African child dies from malaria. Moreover, malaria as the most common imported tropical disease is the most frequent cause of deaths. Currently, in African countries, every year, about 300-500 million people have malaria, and more than a million die from malaria. A high percentage of deaths refers to children under 5 years old, pregnant women and susceptible individuals. Materials and methods: The examination was carried out from July to September, 2011 year in 60 peoplepatients of the Out-patients Clinic f St. Francis Hospital, in Kampala, the capital of Uganda, using the questionnaire created by author.Results: As many as 96.7% of respondents answered that the best method was avoiding mosquitoes via using bed mosquito nets and protective clothing. A total of 51.7% indicated chemical substances as an effective protective method against malaria. The surveyed named repellents such as liquids, aerosols, creams and sticks. Thirty two people (53.7%) wrote that an effective protective method against malaria was to avoid mosquitoes’ incubation sites, to remove garbage frequently and to clear regularly ponds round the houses.Conclusion: Ugandan patients identified the risk factors and groups, non-key symptoms and prophylaxis against malaria. The majority of Ugandan patients indicated there was vaccine against malaria. More than half of Ugandan patients (65%) declared that a mosquito bite is the route of malaria infection, however, more than 50% of those living in rural areas thought on other routes such as, e.g. unboiled water.
Źródło:
Progress in Health Sciences; 2015, 5, 1; 42-55
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stigma of people living with HIV/AIDS
Autorzy:
Van Damme-Ostapowicz, K.
Sarosiek, J.
Krajewska-Kułak, E.
Pedrycz, A.
Cybulski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1917297.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
HIV/AIDS
stigma
Opis:
A specific character of HIV/AIDS has caused numerous complications either medical, legal or social. HIV infection exposes its carriers to frequent acts of intolerance or stigma by the healthy part of the population. Negative social consequences found after detection and disclosure of HIV perfectly match the theory of stigma by Goffman. This theory elucidates mechanisms of stigma or self – stigma affecting these members of the society that via their behavior or life style break the basic social, moral and religious norms. Despite numerous achievements, this disease cannot be overcome completely. People living with HIV/AIDS are still stigmatized and discriminated in the society. They suffer being rejected and isolated by a family, partners and friends. The results demonstrated in the present review, obtained from the examinations conducted among people with HIV/AIDS, in Poland and abroad, attesting stigma, discrimination, low evaluation of the quality of life are the basis for further in-depth studies concerning this issue. This must reinforce educational efforts which will constrain inequality of people with HIV/AIDS, in Poland and abroad. The aim of this study is to inform and sensitize a recipient about stigma among people with HIV/AIDS.
Źródło:
Progress in Health Sciences; 2015, 5, 1; 209-213
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of suppliers in food business: is there a way to estimate the risk?
Ocena dostawców w sektorze żywnościowym: czy jest metoda szacowania ryzyka?
Autorzy:
Trafialek, J.
Kolozyn-Krajewska, D.
Bliska, B.
Tomaszewska, M.
Grzesinska, W.
Lucke, F. K.
Powiązania:
https://bibliotekanauki.pl/articles/828225.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Technologów Żywności
Tematy:
dostawca
relacje dostawca-odbiorca
ocena ryzyka
bezpieczenstwo zywnosci
jakosc zywnosci
zagrozenia
supplier
supplier-customer relationship
risk assessment
food safety
food quality
hazard
Opis:
The objective of the study was to develop an easy-to-apply method for assessing the supplier-linked risk in the food business. The method as suggested in the study makes it possible to calculate, using simple mathematical tools, a level of risk involved in the cooperation with a particular supplier. The risk assessment is based on six criteria set for every supplier: type of commodities or products provided by the supplier; period of the cooperation with the supplier; systems applied by the supplier to assure quality and safety; past performance of the suppliers with respect to delayed deliveries, cancelled deliveries, and claimed deliveries owing to improper quality of raw materials. The method developed was validated in three companies: meat plant, dairy plant, and catering facility. A simple method was proposed to assess what risk a particular supplier could bring on the quality and safety of finished food product. This risk assessment method can be applied in different food businesses. The greatest benefit of the method developed consists in its ease of use and functionality. The suggested method can be used by small companies and it does not require any complicated calculations or advanced statistical techniques. The method can be very useful for enterprises; however, it has certain limitations such as knowledge and awareness of its users.
Celem pracy było opracowanie łatwej do zastosowania metody oceny ryzyka związanego z dostawcami w sektorze żywnościowym. Metoda zaproponowana w pracy umożliwia obliczenie poziomu ryzyka współpracy z danym dostawcą w prosty matematyczny sposób. Ocena ryzyka bazuje na sześciu kryteriach dla każdego dostawcy: rodzaju towarów lub produktów dostarczanych przez dostawcę, czasie współpracy z dostawcą, systemach stosowanych przez dostawcę do zagwarantowania jakości i bezpieczeństwa, opóźnionych i odwołanych dostawach, zareklamowanych dostawach z powodu nieodpowiedniej jakości surowców. Metoda została zwalidowana w trzech zakładach: mięsnym, mleczarskim i gastronomicznym. Zaproponowano prostą metodę oceny ryzyka danego dostawcy w aspekcie wpływu na jakość i bezpieczeństwo produktu. Metoda może być stosowana w zakładach różnych branż. Największą korzyścią zaproponowanej metody jest jej łatwość stosowania oraz funkcjonalność. Może być wykorzystana w małych zakładach i nie wymaga stosowania skomplikowanych obliczeń, czy zaawansowanych statystycznych narzędzi. Metoda może być bardzo pomocna w przedsiębiorstwach, ale ma pewne ograniczenia, jak wiedza i świadomość użytkowników.
Źródło:
Żywność Nauka Technologia Jakość; 2017, 24, 1
1425-6959
Pojawia się w:
Żywność Nauka Technologia Jakość
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nager type of Acrofacial dysostosis: an example of autosomal dominant transmission with variable expression
Acrofacial dysostosis typu Nagera: przykład dziedziczenia autosomalnego o zmiennej ekspresji
Akrolicevojj dizostoz tipa Nager: primer peredachi autosomnojj dominanty s izmenchivojj ekspressiejj
Autorzy:
Chrzanowska, K.
Fryns, J.P.
Krajewska-Walasek, M.
Van Den Berghe, H.
Wisniewski, L.
Powiązania:
https://bibliotekanauki.pl/articles/68753.pdf
Data publikacji:
1991
Wydawca:
Polska Akademia Nauk. Instytut Genetyki Roślin PAN
Źródło:
Genetica Polonica; 1991, 32, 1-2
0016-6715
Pojawia się w:
Genetica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Different mutations in Polish patients with HPRT deficiency - the Lesch-Nyhan and Kelley-Seegmiller syndromes
Autorzy:
Popowska, E
Sulek, A.
Kubalska, J.
Pronicka, E.
Jezewska, M.
Trembacz, H.
Goryluk-Kozakiewicz, B.
Krajewska-Walasek, M.
Powiązania:
https://bibliotekanauki.pl/articles/2044455.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
deletion
Lesch Nyhan syndrome
Kelley-Seegmiller syndrome
hypoxanthine-guanine phosphoribosyltransferase deficiency
enzyme activity
Polish patient
point mutation
Opis:
Five families with the Lesch-Nyhan syndrome (LNS) and two families with the Kelley-Seegmiller syndrome (KSS) were studied. Seven different mutations were identified. Two transitions, C526→ T (Prol76Ser) and G481→A (Ala161Thr), in patients with a milder form of hypoxanthine-guanine phosphoribo-syltransferase (HPRT) deficiency were detected. In patients with the Lesch-Nyhan syndrome two transitions, G569→A (Glyl90Glu) and C508→T (Arg170Ter), two transversions, C222→A (Phe74Leu) and C482→A (Ala161Glu), and a deletion of seven nucleotides (from A394 to G400) were observed. All except two of the identified mutations are novel. The C222→A substitution in exon III is located within one of the clusters of hot spots of the HPRT gene and has been previously described in four unrelated patients. The other recurrent mutation C508→T in exon VII has been reported in eight families.
Źródło:
Journal of Applied Genetics; 1998, 39, 1; 103-111
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Severe carbamates intoxication of 43-year-old farmer – case report
Autorzy:
Klatka, B.Z.
Terpiłowski, M.
Orzeł, A.K.
Janeczko, D.
Hołowczuk, M.
Tchórz, M.
Krajewska, A.
Szponar, J.
Powiązania:
https://bibliotekanauki.pl/articles/28762755.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2021, 28, 2; 358-360
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
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