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Tytuł:
Adverse effects of antioxidative vitamins
Autorzy:
Rutkowski, Maciej
Grzegorczyk, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2180105.pdf
Data publikacji:
2012-06-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
vitamins A
E and C
β-carotene
supplementation
side actions
toxic effects
Opis:
High doses of synthetic antioxidative vitamins: A, E, C and β-carotene are often used on long-term basis in numerous preventive and therapeutic medical applications. Instead of expected health effects, the use of those vitamins may however lead to cases of hypervitaminosis and even to intoxication. The article points out main principles of safety which are to be observed during supplementation with antioxidative vitamins. Toxic effects resulting from erroneous administration of high doses of those substances on organs and systems of the organism are also discussed. Attention is drawn to interactions of antioxidative vitamins with concomitantly used drugs, as well as intensification of adverse effects caused by various exogenous chemical factors. Moreover, the article presents the evaluation of supplementation with these vitamins, which was performed in large studies.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2012, 25, 2; 105-121
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wpływu suplementacji diety witaminami A, E i C na ich zawartość w osoczu krwi osób starszych
Assessment of influence of the A, E and C vitamins diet supplementation on their contents of advanced age people blood plasma
Autorzy:
Matuszewski, T.
Klos, K.
Kedziora, J.
Rutkowski, M.
Tokarski, S.
Powiązania:
https://bibliotekanauki.pl/articles/827853.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Technologów Żywności
Tematy:
zywienie czlowieka
ludzie starzy
dieta
suplementacja zywnosci
suplementy diety
witaminy
witamina A
witamina E
witamina C
osocze
zawartosc witamin
przeciwutleniacze
Opis:
Celem pracy była ocena stężenia witamin A, E i C w osoczu krwi osób starszych, >65 roku życia, przed i po 30-to dniowej suplementacji witaminowej. Do badań zakwalifikowano 22 zdrowe osoby. Oznaczenia badanych witamin wykonano przy użyciu spektrofotometru dwuwiązkowego UV/Vis Lambda 14p (Perkin Elmer). Przed suplementacją stwierdzono obniżone wartości badanych witamin w surowicy. Zastosowana 30 dniowa suplementacja wpłynęła na zwiększenie zawartości badanych witamin u 15% badanych.
The aim of the work was the estimation of the vitamins A, E and C concentration in the plasma of 22 healthy elder persons, before and after 30 days of additional supplementation. Vitamins were determined with double beam spectrophotometer UV/Vis Lambda 14p (Perkin Elmer). Before additional supplementation the lower content of vitamins was observed. The 30 days diet supplementation by vitamins caused increase of their content in the serum in 15% adults.
Źródło:
Żywność Nauka Technologia Jakość; 2009, 16, 4
1425-6959
Pojawia się w:
Żywność Nauka Technologia Jakość
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Między tłuszczem a tłuszczą
Fat: Fat[e]s and Fa[c]ts
Autorzy:
Białas, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/467335.pdf
Data publikacji:
2002
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Opis:
Zbigniew Białas Fat: Fat[e]s and Fa[c]ts   Summary Fat is seen in most travel literature as inspirational towards sloth, idleness and inertia. It is frequently linked to the discourse of gluttonous excess. The essay - a reconaissance into a potentially huge, uncharted territory of aesthetics - signals several complex relations between the traveller and the representations of fat. Presented here under several emblematic guises (body fat, fat on the the surface of the body, protective grease, etc) fat is analysed, all in all, as a convenient representational tool, not only for constructing disgust.
Zbigniew Białas Fat: Fat[e]s and Fa[c]ts   Summary Fat is seen in most travel literature as inspirational towards sloth, idleness and inertia. It is frequently linked to the discourse of gluttonous excess. The essay - a reconaissance into a potentially huge, uncharted territory of aesthetics - signals several complex relations between the traveller and the representations of fat. Presented here under several emblematic guises (body fat, fat on the the surface of the body, protective grease, etc) fat is analysed, all in all, as a convenient representational tool, not only for constructing disgust.
Źródło:
ER(R)GO: Teoria – Literatura – Kultura; 2002, 4
1508-6305
2544-3186
Pojawia się w:
ER(R)GO: Teoria – Literatura – Kultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The number of E. coli and C. perfringens bacteria in poultry waste and subsequent phases of composting
Liczebność bakterii E. coli i C. perfringens w odpadach drobiarskich oraz kolejnych fazach ich kompostowania
Autorzy:
Cybulska, K.
Suchecka, N.
Wrońska, I.
Mahdi-Oraibi, S.
Powiązania:
https://bibliotekanauki.pl/articles/125776.pdf
Data publikacji:
2015
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
E.coli
C. perfringens
poultry waste
composting
E. coli
odpady drobiarskie
kompostowanie
Opis:
Rapidly growing commercial poultry production generates large amounts of waste. Waste that accumulates during the poultry slaughter process often remains unprocessed, becoming a serious threat to people’s health and the natural environment. Poultry production waste constitutes problems odour threat and dangerous sanitary threat. The aim of this study was to determine the population size of Escherichia coli and Clostridium perfringens in poultry waste and in successive stages of waste composting. Research material consisted of raw feathers collected immediately after the slaughter, samples of biological sludge from the centrifuge, mixture of straw, feathers and lime and processed compost. Microbiological analyses were conducted with the use of spread plate count method and the substrate was used in accordance with research standards. The size of population of microorganisms in the samples analyzed corresponded to the waste processing stage and group of microbes. The presence of C. perfringens strains was ascertained in all samples, whereas E. coli strains were identified only in raw feathers and centrifuge sludge, being most numerous in unprocessed material. A reverse trend was observed in case of C. perfringens with the highest population density in centrifuge sludge and least density in raw feathers.
Intensywnie rozwijająca się produkcja drobiarska wiąże się z generowaniem dużej ilości odpadów. Powstające produkty uboczne podczas uboju pozostawione w stanie surowym stają się poważnym zagrożeniem dla środowiska naturalnego i zdrowia ludzi. Mogą stwarzać problemy odorotwórcze oraz istotnie groźne zanieczyszczenie sanitarne. Celem przeprowadzonych badań było określenie liczebności E. coli i C. perfringens w odpadach drobiarskich oraz kolejnych etapach ich kompostowania. Materiał badawczy stanowiły świeże pióra bezpośrednio po uboju, osad biologiczny z wirówki, mieszanina słomy, pierza i wapna oraz kompost przerobiony. Analizy mikrobiologiczne wykonano metodą płytkową, wykorzystując wybiórcze podłoża zgodne z normami. Liczebność mikroorganizmów w badanych próbach zależała od fazy przerobu odpadu i analizowanej grupy drobnoustrojów. Obecność bakterii C. perfringens stwierdzono we wszystkich próbach, natomiast bakterie E. coli tylko w piórach surowych i osadzie z wirówki, przy czym najliczniej występowały w materiale nieprzetworzonym. Odwrotną tendencję zaobserwowano w przypadku C. perfringens, które najliczniej zasiedlały osad z wirówki, natomiast ich mniejszą liczebność stwierdzono w piórach surowych.
Źródło:
Proceedings of ECOpole; 2015, 9, 1; 19-24
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of supplementation with vitamins E, C and Beta-carotene on antioxidative/oxidative status parameters in sows during the postpartum period
Autorzy:
Szczubial, M.
Powiązania:
https://bibliotekanauki.pl/articles/31203.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The effect of vitamins E, C and ß -carotene supplementation in sows on the parameters of antioxidative/oxidative status during the postpartum period was investigated. Twenty four primiparous sows, divided into two groups (experimental and control), were included in the study. After the half-way point of pregnancy until farrowing, each experimental sow received feed supplemented twice a week with 200 mg of vitamin E and 1000 mg of vitamin C, and additionally, 70 mg of ß-carotene were administered via intramuscular injection, on day 14 and day 7 before farrowing. The control group was not supplemented. Blood samples were collected before supplementation (gestational day 57-58), 48 hours and 7 days after parturition. The following antioxidative and oxidative parameters were measured using spectrophotometric methods: glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), catalase (CAT), vitamin C, vitamin E, thiobarbituric acid reactive substances (TBARS), and sulfhydryl groups (SH groups). In supplemented sows the erythrocyte activity of GSH-Px and CAT was found to be significantly higher on day 7 after farrowing and the activity of SOD was significantly higher at 48 hours postpartum, compared to the control group. The concentration of vitamins C and E in plasma of the supplemented group was found to be significantly higher and the content of TBARS was found significantly lower at both postpartum measurement points, compared to the control group. The content of SH groups was significantly higher on day 7 postpartum, compared to the control group. The study findings indicate that supplementation of pregnant sows with vitamins E, C and ß-carotene in the second half of pregnancy has beneficial effects on the antioxidative/oxidative balance in the postpartum period by increasing the antioxidative potential and reducing lipid and protein peroxidation.
Źródło:
Polish Journal of Veterinary Sciences; 2015, 18, 2
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of vitamins A, C and E content in diets of adolescents living in Warsaw, Poland
Autorzy:
Dybkowska, E.
Waszkiewicz-Robak, B.
Piekot, E.
Powiązania:
https://bibliotekanauki.pl/articles/874638.pdf
Data publikacji:
2014
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
human nutrition
diet
vitamin A
vitamin C
vitamin E
antioxidant
intake
adolescent
Warsaw city
Polska
nutrient content
Opis:
Background. Antioxidant vitamins such as alpha-tocopherol (vitamin E), ascorbic acid (vitamin C), and beta-carotene (provitamin A), play a significant role in protecting the body from an excess of free radicals. The vitamin content of the diet is thus very important. Objective. To assess whether the dietary intake of vitamins A, C and E is adequate in a selected group of adolescents living in Warsaw. Material and methods. The mean vitamin consumption was estimated using three-day dietary records whilst vitamin contents of selected foodstuffs were obtained from Food Composition Tables. Both were related to Polish nutrition standards applied to adolescents; i.e. EAR (Estimated Average Requirement) for vitamins A and C and AI (Adequate Intake) for vitamin E. Results. Dietary vitamin C in adolescents and vitamin E in girls were around 18-25% lower than that recommended. Diets that were deficient in vitamins C and E were recorded in 47% to 67% adolescents. Conclusions. It is therefore necessary to increase the consumption of vegetables and fruit which provide a valuable dietary source for these vitamins.
Wprowadzenie. Witaminy antyoksydacyjne – alfa-tokoferol (witamina E), kwas askorbinowy (witamina C) i beta-karoten (prowitamina A) pełnią istotną rolę w ochronie organizmu przed wolnymi rodnikami, dlatego odpowiednia zawartość tych witamin w diecie ma istotne znaczenie. Cel. Celem badań była ocena poziomu spożycia witamin A, C i E z produktami spożywczymi w wybranej grupie młodzieży zamieszkałej na terenie Warszawy. Materiał i metody. Średnie spożycie witamin oszacowano na podstawie badań przeprowadzonych metodą trzydniowego bieżącego notowania spożycia produktów spożywczych oraz przy zastosowaniu tabel wartości odżywczej produktów spożywczych i odniesiono do polskich norm dla młodzieży ustalonych na poziomie średniego zapotrzebowania (EAR) dla witamin A i C oraz na poziomie wystarczającego spożycia (AI) dla witaminy E. Wyniki. Zawartość witaminy C w diecie młodzieży oraz witaminy E w diecie dziewcząt była o około 18-25% niższa od zalecanej. Diety ubogie w witaminę C i E spożywało około 47-67% młodych osób. Wnioski. Istnieje potrzeba zwiększenia spożycia warzyw i owoców, jako ważnych źródeł tych witamin w diecie.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2014, 65, 1
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
George W.E. Nickelsburg and James C. VanderKam, 1 Enoch 2: A Commentary on the Book of 1 Enoch. Chapters 37-82 (Hermeneia; Minneapolis: Fortress Press, 2012). Pp. xxx, 617. $ 82. ISBN 978-0-8006-9666-1
Autorzy:
Drawnel, Henryk
Powiązania:
https://bibliotekanauki.pl/articles/1178517.pdf
Data publikacji:
2012
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Opis:
Review
Recenzja
Źródło:
The Biblical Annals; 2012, 2, 1; 363-367
2083-2222
2451-2168
Pojawia się w:
The Biblical Annals
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mobilization of pulmonary glutathione and ascorbic acid by dietary intake of antioxidant vitamins under ozone exposure in rats - short report
Mobilizacja glutationu i kwasu askorbinowego w plucach szczurow zywionych pasza wzbogacona w witaminy E i C w warunkach ekspozycji na ozon - komunikat
Autorzy:
Zielinski, H.
Powiązania:
https://bibliotekanauki.pl/articles/1373110.pdf
Data publikacji:
1997
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
szczury
kwas askorbinowy
witamina E
pasze
zwierzeta laboratoryjne
zywienie zwierzat
witamina C
glutation
pluca
wzbogacanie pasz
ozon
Opis:
The purpose of this investigation was to find out the level of lung reduced glutathione (GSH) and ascorbic acid in rats exposed to ozone (980±390 µg/m3, five weeks, eight hours a day ) under condition of different diet with vitamins E and C. The control rats were fed with commercial standard diet and were exposed to air. GSH was assayed by a spectrofluorimetric method and ascorbic acid was determinated by 2,4-dinitrophenylhydrazine method. The study revealed no statistically significant increase in pulmonary GSH and ascorbic acid in rats exposed to ozone which were fed commercial standard diet. When different diets of vitamins E and C were applied separately and together, the increase in lung ascorbic acid in the animals exposed to ozone was greater and statistically significant compared with respective control groups. Also, in the case of separate supplementation with vitamins E and C, the statistically significant increase of dose-dependent GSH was observed. When vitamins E and C were supplemented together, no changes in GSH level were noted. The observed increases in GSH and ascorbic acid may reflect the mobilization of these antioxidants to the lung under ozone-induced oxidative stress.
Celem pracy była ocena zawartości witaminy C i zredukowanego glutationu w tkance płucnej u szczurów żywionych paszą standardową oraz paszą standardową wzbogaconą wzrastającymi dawkami witaminy E i C w warunkach poddania ich przewlekłemu narażeniu na oddychanie powietrzem o zwiększonej koncentracji ozonu (980 µg/m3, 5 tygodni, 8 godzin dziennie). Grupy kontrolne stanowiły zwierzęta oddychające zwykłym powietrzem atmosferycznym i żywione paszą standardową. Przeprowadzone badania wykazały statystycznie nieistotny wzrost poziomu zredukowanego glutationu i kwasu askorbinowego w grupach zwierząt żywionych paszą standardową i poddanych ekspozycji na ozon. W grupach ozonowanych zwierząt żywionych paszą standardową wzbogaconą w sposób łączny bądź oddzielny witaminami E i C obserwowany wzrost poziomu witaminy C był wyższy oraz statystycznie istotny w stosunku do grup kontrolnych. Podobnie w grupach ozonowanych zwierząt żywionych paszą standardową wzbogaconą w sposób oddzielny witaminą E i C stwierdzono, statystycznie istotny i zależny od dawki odpowiedniej witaminy, wzrost poziomu zredukowanego glutationu w tkance płucnej. Zjawiska tego nie stwierdzono u ozonowanych zwierząt żywionych paszą standardową wzbogaconą w sposób łączny witaminami E i C.
Źródło:
Polish Journal of Food and Nutrition Sciences; 1997, 06, 2; 73-78
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Can the effects of chromium compounds exposure be modulated by vitamins and microelements?
Autorzy:
Sijko, Monika
Janasik, Beata
Wąsowicz, Wojciech
Kozłowska, Lucyna
Powiązania:
https://bibliotekanauki.pl/articles/2086573.pdf
Data publikacji:
2021-08-05
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
zinc
folic acid
selenium
hexavalent chromium
vitamin E
vitamin C
Opis:
Chromium (Cr) is a very common element. It occurs in 2 oxidation states, Cr(III) and Cr(VI). Although Cr(III) is not considered an element essential for mammals, it raises lots of controversy due to its role in the body. While Cr(III) action should be considered an effect of pharmacological action, Cr(VI) is included in the first group of carcinogens for humans. Moreover, it induces numerous pathological changes in the respiratory, urinary, reproductive and digestive systems. In addition, Cr(VI) is used in many industry branches, causing millions of workers all over the world to be exposed to Cr(VI) compounds. A considerable number of the occupationally exposed individuals are in favor of a deep analysis of the mechanisms of Cr(VI) action and a search for a way to reduce its negative impact on the human body. Numerous reactive oxygen species inducing oxidative stress and causing various damage are produced during Cr(VI) reduction in the cells. A good balance between antioxidants and pro-oxidants can reduce Cr(VI)-induced damage. The influence of vitamins and microelements on the adverse Cr(VI) effects has no systematic research results summary. Therefore, this work focuses on the role of dietary antioxidants such as vitamins and microelements in the prevention of Cr(VI) adverse health effects. Numerous studies have revealed a protective influence of vitamins (mainly vitamins E and C) as well as microelements (especially selenium) on the reduction of Cr(VI)-induced adverse changes. A potential protective effect of these ingredients may be useful in occupational groups that are particularly exposed to Cr(VI). However, more research in this area is required.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2021, 34, 4; 461-490
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New trends for reference evapotranspiration and climatic water deficit
Autorzy:
Paltineanu, C.
Chitu, E.
Mateescu, E.
Powiązania:
https://bibliotekanauki.pl/articles/24153.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
The paper deals with the trend for Penman- Monteith reference evapotranspiration and climatic water deficit during the first decade of the 21st century in Southern Romania vs the 20th century. For the first half of the year the monthly evapotranspiration values were higher for the first decade of the 21st century vs the means of the 20th century. However, the trend reverses for the second half of the year, but for the whole year the totals were higher for the first decade of the 21st century vs the totals of the 20th century. The yearly temperature means in the first decade of the XXI century showed an increase in the three locations studied, respectively, vs century XX. This warming is responsible to a great extent for the increase in evapotranspiration, and the relationship between evapotranspiration and temperature was highly significant. Water deficit decreased in Constanta and Pitesti, but there was a slight increase in water deficit in the same period in Bucharest-Baneasa. Water deficit increased in the first half of the year and decreased in the second half during the first decade of century XXI in all the three locations investigated vs century XX.
Źródło:
International Agrophysics; 2012, 26, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phyto-availability of potentially toxic metals in Curcubita ficifolia grown on contaminated and non-contaminated soils
Autorzy:
Enenebeaku, C.K.
Anyanwu, C.N.
Okorocha, N.J.
Enenebeaku, U.E.
Nzediegwu, E.
Ogukwe, C.E.
Powiązania:
https://bibliotekanauki.pl/articles/10825.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2016, 59
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SiGe field effect transistors - performance and applications
Autorzy:
Whall, T.E.
Parker, E.H.C.
Powiązania:
https://bibliotekanauki.pl/articles/307664.pdf
Data publikacji:
2001
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
SiGe
FETs
epitaxy
circuits
Opis:
Recent and encouraging developments in Schotky and MOS gated Si/SiGe field effect transistors are surveyed. Circuit applications are now beginning to be investigated. The authors discuss some of this work and consider future prospects for the role of SiGe field effect devices in mobile communications.
Źródło:
Journal of Telecommunications and Information Technology; 2001, 1; 3-11
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Review: Wavelet Theory and Harmonic Analysis in Applied Sciences, edited by C. E. D’Atellis and E. M. Fernandez-Berdaguer
Autorzy:
Kon, Mark A.
Powiązania:
https://bibliotekanauki.pl/articles/748220.pdf
Data publikacji:
1999
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
.
Opis:
Artykuł nie zawiera streszczenia
The article contains no abstract
Źródło:
Mathematica Applicanda; 1999, 27, 41
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phytochemical Screening and Antimicrobial Activity of Ethanol and Methanol Extracts of Lantana camara Leaf
Autorzy:
Ezebo, R. O.
Okonkwo, C. C.
Ozoh, C. N.
Nwankwo, C. A.
Nwafor, E. C.
Esimai, B. G.
Achonye, C. C.
Obienyem, J. N.
Powiązania:
https://bibliotekanauki.pl/articles/1839418.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Phytochemical
Antimicrobial
Activity
Ethanol
Methanol
Lantana camara
leaf
Opis:
This study investigated the phytochemical composition and antimicrobial activities of ethanol and methanol leaf extracts of Lantana camara Linn against some clinical pathogens. The ethanol and methanol extracts were obtained by soaking each of the powdered leaf in each solvent. The soaked powdered leaf was allowed to stand for four days at room temperature and later filtered using Whatman filter paper. The filtrate was further concentrated using rotary evaporator and then freeze-dried. The minimum inhibitory concentration (MIC) of the ethanol and methanol leaf extracts was carried out using agar well diffusion method. The phytochemical analysis was done using standard techniques. Data were analysed using Analysis of Variance (ANOVA) to test for significance. Means were separated using Duncan’s Multiple Range Test (DMRT). The results of the antimicrobial activity revealed that V. cholerae was the most susceptible while E. coli was the most resistant to plant extracts. The phytochemicals present in the plant leaf had antimicrobial properties and may serve as a good substitute for resistant human pathogens.
Źródło:
World News of Natural Sciences; 2021, 37; 151-163
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical and chemical characterization of masa and tortillas from parental lines, crosses, and one hybrid
Autorzy:
Valderrama-Bravo, C.
Dominguez-Pacheco, A.
Hernandez-Aguilar, C.
Zepeda-Bautista, R.
del Real-Lopez, A.
Pahua-Ramos, M.E.
Arellano-Vazquez, J.L.
Moreno-Martinez, E.
Powiązania:
https://bibliotekanauki.pl/articles/24739.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
In maize plant breeding aimed at producing a hybrid, it is necessary to characterize the parents and hybrids by their agronomic aspects and grain quality so that the processing industry may offer consumers a quality product and also improve its efficiency. This study evaluated the viscoelastic parameters of masa and the chemical and texture properties of tortillas obtained from parent lines (M-54, M55, and CML-242), two single crosses (M54xM55 and M55xM54), and one hybrid (H-70). The morpho- logy of the maize grains and tortillas was analyzed using scanning electron microscopy. The firmness of masa obtained from CML-242 and H-70 maize was higher than that from the other maize genotypes. M-54 tortillas showed the lowest crude fiber content. Otherwise, tortillas obtained from the M55xM54 hard grain had the lowest fat content and extensibility, while H-70 tortillas showed an intermediate breaking point and extensibility. M-54 and M54xM55 tortillas were softer due to their more swollen starch granules. In contrast, rigid tortillas were obtained from CML-242 and H-70. Grain hardness causes different morphology in starch and tortilla of maize genotypes. However, grain hardness did not influence the characteristics of texture in tortillas.
Źródło:
International Agrophysics; 2017, 31, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Silurian retiolitid graptolites: Morphology and evolution
Autorzy:
Bates, D E B
Kozlowska, A.
Lenz, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/22802.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Developmental mode and proximal structures are commonly accepted as the best for the recognition of high−level taxonomic categories within the Graptoloidea. The petalolithids and retiolitids are unique in possessing a virgellar ancora and in the latter, distal ancora development. The ancora structures are considered homologous, and the ancorate petalolithids are considered to be the direct ancestors to the retiolitids. The Retiolitidae are unique among the diplograptoids in possessing (1) outer, lateral, ancora sleeve walls (derived from distal extension of the ancora), and (2) a skeletal framework of bandaged lists between which are a succession of very thin and rarely preserved fusellar layers. Retiolitids possess different kinds of thecal profiles and two types of micro−ornamentation on the lists, and these have served to distinguish between the subfamilies Retiolitinae and Plectograptinae. Complete retiolitid morphological terminology is clarified and explained. Cladistic analysis of the retiolitids provides some measure of a better understanding of retiolitid evolution, but adds only modest support for the retention of the two subfamily categories.
Źródło:
Acta Palaeontologica Polonica; 2005, 50, 4; 705-720
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
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:
Histopathological, immunohistochemical and biochemical evaluation of electroacupuncture treatment of nervus radialis and nervus ulnaris injuries in rabbits
Autorzy:
Polat, E.
Gunay, C.
Eroksuz, H.
Yilmaz, S.
Kaya, E.
Karabulut, B.
Akdeniz Incili, C.
Powiązania:
https://bibliotekanauki.pl/articles/16624049.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
histopathological
immunohistochemical
nerve injury
oxidative stress
electroacupuncture
Opis:
The aim of this study was to evaluate the efficacy of electroacupuncture in acute and chronic phases of radial and ulnar nerve injuries in histopathological, immunohistochemical and biochemical aspects. In the study, the rabbits were divided into four groups namely acute nerve injury (ANI) group, chronic nerve injury (CNI) group, positive control (PC) group and negative control (NC) group. In the ANI, CNI and PC groups, damage was created on the nervus radialis and nervus ulnaris by applying pressure for 60 seconds using a hemostatic forceps under anesthesia. No damage was created in the NC group. Fifteen sessions of electroacupuncture were applied to the rabbits in the ANI, CNI, and NC groups every other day using LI-4 (Large Intestine Meridian-4, He Gu), LI-10 (Large Intestine Meridian-10, Shou San Li), LR-3 (Liver Meridian-3, Tai Chong), and ST-36 (Stomach Meridian-36, Zusanli) electroacupuncture points. Electroacupuncture was not applied to the rabbits in the PC group. Decapitation was performed under general anesthesia at the end of electroacupuncture applications. After the euthanasia procedure, the samples obtained were evaluated for histopathological, immunohistochemical and biochemical parameters. In conclusion, degenerative foci in the treatment groups were found to be fewer than in the PC group whereas NGF and S-100 immunoreactivity were higher in the treatment groups than in the PC group. Whereas no statistically significant difference was observed between the treatment groups and the NC group in terms of oxidative stress factors, there was a statistically significant difference between the treatment groups and the PC group. In light of all these data, we have concluded that electroacupuncture is an effective treatment method for peripheral nerve injuries.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 4; 511-524
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
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:
Fungal diversity and Aspergillus in hospital environments
Autorzy:
Martinez-Herrera, E.O.
Frias-De-Leon, M.G.
Duarte-Escalante, E.
Calderon-Ezquerro, M.del C.
Jimenez-Martinez, M.del C.
Acosta-Altamirano, G.
Rivera-Becerril, F.
Toriello, C.
Reyes-Montes, M.del R.
Powiązania:
https://bibliotekanauki.pl/articles/49519.pdf
Data publikacji:
2016
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2016, 23, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sonolysis and Sonoacidification οf Ultrasonic Disintegration οf Excess Sludge
Autorzy:
Zielewicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/1811568.pdf
Data publikacji:
2008-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.35.-c
Opis:
The expected effect of ultrasonic disintegration of excess sludge is particle dispergation and cell lysis i.e. the elimination of sludge microorganisms and the release of the contents of dead cells into the sludge liquid which results in an increase in chemical oxygen demand. Sonolysis also formed the basis for the intensification of volatile fatty acids production during the acid fermentation of excess sludge treated ultrasonically. In this study the investigations into the direct effects of excess sludge ultrasonic treatment revealed an increase in volatile fatty acid concentration directly (without fermentation process) after the ultrasonic treatment which is closely related to sonolysis.
Źródło:
Acta Physica Polonica A; 2008, 114, 6A; A-259-A-264
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bridging IMO e-Navigation Policy and Offshore Oil and Gas Operations through Geospatial Standards
Autorzy:
Modesto, F.
Bazilio, C.
Weitzel, L.
Carballini, J.
Peyton, D.
Powiązania:
https://bibliotekanauki.pl/articles/116140.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
e-Navigation
e-Navigation Policy
Offshore
Offshore Oil and Gas Operations
Geospatial Standards
Oil and Gas
e-Navigation Concept
IHO S-100
Opis:
In offshore industry activities, the suitable onboard provision of assets location and geospatial marine information during operations is essential. Currently, most companies use its own data structures, resulting in incompatibility between processes. In order to promote the data exchange, oil and gas industry associations have pursued initiatives to standardize spatial information. In turn, the IMO - International Maritime Organization - started the implementation of e-Navigation policy, which is the standardization of technologies and protocols applied to maritime information and navigation. This paper shows relationship and integration points between maritime activities of oil and gas industry and e-Navigation technologies and processes, highlighting geospatial information. This paper also preludes out an initiative for a suitable product specification for the offshore oil and gas industry, compliant with e-Navigation and IHO S-100 international standards.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 1; 49-55
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simultaneous generation of bioelectricity and treatment of swine wastewater in a microbial fuel cell
Autorzy:
Egbadon, E.O.
Akujobi, C.O.
Nweke, C.O.
Braide, W.
Akaluka, C.K.
Adeleye, S.A.
Powiązania:
https://bibliotekanauki.pl/articles/11533.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
This study aimed at the simultaneous treatment of wastewater obtained from swine and generation of bioenergy in form of electricity from the energy stored in the organic component of the wastewater. The Open circuit voltage, current, power density and microbiological and physicochemical parameters were monitored. An initial Open circuit voltage of 516mV, Current of 0.29mA, and Power density of 32.74mW/m2 were recorded, which increased to give maximum Open Circuit Voltages of 836mV, Current of 0.49mA, and Power density of 88.45mW/m2. The results revealed that The Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), Organic carbon, Total Soluble solids (TSS), Ammonia, Ammonium and Ammonium-Nitrogen all showed percentage decrease of 85.92%, 51.74%, 78.16%, 98.87%, 55.87%, 55.79% and 55.90% respectively while parameters such as Total Dissolved Solids (TDS), Nitrate, Nitrate-Nitrogen, Phosphates, Phosphorus and Orthophosphates however increased after treatment to give a percentage increase of -273.60%, -131.65%, -134.85%, -168.77%, -159.26%, and -157.03% respectively. Bacteria isolates identified at the biofilms on the anode were Corynebacterium specie, Bacillus specie, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Streptococcus faecalis. The results from this study further exacerbate the Bioelectricity production as well as wastewater treatment potentials of the Microbial Fuel Cell technology.
Źródło:
International Letters of Natural Sciences; 2016, 54
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systematic review of Neocaviafrom the Neogene of Argentina: Phylogenetic and evolutionary implications
Autorzy:
Madozzo-Jaen, M.C.
Perez, M.E.
Montalvo, C.
Tomassini, R.L.
Powiązania:
https://bibliotekanauki.pl/articles/21378.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Caviidae is one of the groups of rodents with the greatest ecomorphological disparity, and with currently three known lineages: Caviinae (cuises), Dolichotinae (maras), and Hydrochoerinae (capybaras). Caviinae include small caviids represented by three extant genera (Microcavia, Cavia, and Galea) and three fossils forms (Dolicavia, Palaeocavia, and Neocavia). In Argentina, the fossil record of Caviinae is continuous and abundant since the late Miocene. Neocavia, specifically, is represented by different species recorded in the late Miocene–Pliocene. Here, we describe a new species of Neocavia from the late Miocene–early Pliocene of the Cerro Azul Formation (La Pampa Province, Argentina), and provide a re-description of already known species (Neocavia lozanoi and “Neocavia depressidens”). Also, we perform a more comprehensive review of the genus and include the Neocavia species in a phylogenetic context within Caviinae. We analyze the main patterns of the evolution of the tympanic bullae within Caviidae, and infer about a possible occasional fossorial habit of Neocavia. The morphological and phylogenetic analyses indicate that Neocavia is more closely related to Dolicavia and Microcavia than to the other Caviinae, and confirm the monophyly of the genus, with at least two clearly differentiable species. Since this study cannot confirm the systematic position and validity of “N. depressidens”, we suggest not to use this taxon as a biostratigraphic indicator.
Źródło:
Acta Palaeontologica Polonica; 2018, 63, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Discussion on e-Navigation and Implementation in Turkey
Autorzy:
Aydogdu, Y.
Yalcin, E.
Yurtorren, C.
Aksoy, S.
Powiązania:
https://bibliotekanauki.pl/articles/116683.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
IALA Approach
IMO Documents
e-Navigation
e-Navigation Concept
e-Navigation Implementation Process
IALA Guidelines
Turkish Waterways
Electronic Navigation
Opis:
Electronic navigation, which has great important for ship management, has taken a step with technological improvements. In the result of these enhancements, new systems appeared as well as existing systems and these systems began to be integrated each other or used data of obtaining from the others like that AIS, Radar, ECDIS etc. All these and likely future systems have been put together under the roof of enhanced navigation (e-navigation) is defined by organizations such as International Maritime Organization (IMO), International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA), General Lighthouse Authority (GLA) etc. Especially IALA guidelines serve as model future applications in Turkish waterways. In this study aim to redefine e-navigation concept based on maritime safety awareness, maritime service portfolio (MSC 85/26) and discuss possible applications.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 1; 81-87
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecomorphology and bone microstructure of Proterochampsia from the Chanares Formation
Autorzy:
Arcucci, A.
Previtera, E.
Mancuso, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/21349.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Proterochampsians are a South American endemic group of non-archosaurian archosauriforms with morphological characteristics recollecting Recent crocodilians, and therefore have been proposed as aquatic species. However, this has not been based on careful examination of anatomical and histological features. We provide a review of the morphological and histological evidence present in the skeleton of proterochampsids and discuss its implications for inferring the lifestyles of these organisms. Anatomical features such as a secondary palate, marginal dentition, palatine teeth, morphology of the tail, limb modification, and dermal armor are reviewed, and details of histological structures are described based on bone thin sections. Histological examination reveals a predominance of fibrolamellar bone tissue, suggesting rapid periosteal osteogenesis and therefore overall fast bone growth. The existence of discontinuities (LAGs) demonstrates that these animals responded to changes in their environment. Ecomorphological features do not provide definitive evidence for the lifestyles of proterochampsids, but allow us to propose a terrestrial/amphibious condition. The same is true of the histological features, particularly compactness of the bone.
Źródło:
Acta Palaeontologica Polonica; 2019, 64, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural and Magnetic Properties of Nano-Sized NiZn Ferrites
Autorzy:
Ušák, E.
Šoka, M.
Ušáková, M.
Dobročka, E.
Powiązania:
https://bibliotekanauki.pl/articles/1366899.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Gg
75.50.Tt
61.46.Df
61.05.C-
75.30.Cr
75.75.-c
Opis:
Structural and magnetic properties (such as e.g. size of crystallites, lattice parameter, magnetic susceptibility, Curie temperature, etc.) of nano-sized $Ni_{0.33}Zn_{0.67}Fe_{2}O_{4}$ ferrites have been studied. The obtained results demonstrated that the sintering temperature is an efficient and simple tool for controlling the size of crystallite particles, thus affecting the resulting magnetic properties. Straightforward relationship between the sintering temperature and the size of crystallites was found, meanwhile no other crystalline phases than the spinel one were detected by two independent analytic methods.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 68-69
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The content of ascorbic and dehydroascorbic acids and vitamin C in non-preserved juices, depending on their type and storage time
Autorzy:
Drywien, M.E.
Frackiewicz, J.
Szpoton, S.
Powiązania:
https://bibliotekanauki.pl/articles/2082839.pdf
Data publikacji:
2021
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
vitamin C
ascorbic acid
dehydroascorbic acid
non-preserved juices
Opis:
Background. Vitamin C is one of the most important water-soluble vitamins. It is responsible for many important functions in the body, including: it has a positive effect on maintaining immunity, protects the body against free radicals, and also participates in the synthesis of hormones. Juices can be a good source of this vitamin. Most of the juices available on the market are processed products. Untreated juices, which do not contain added preservatives, sugar and are not pasteurized, constitute a smaller group on the market. Therefore, this group of juices can be a valuable product in human nutrition. Objective. The aim of the study was to analyze the content of ascorbic acid (AA), dehydroascorbic acid (DHAA) and vitamin C (TAA) in non-preserved juices, depending on their type and storage time. Material and methods. The analysis of TAA, AA and DHAA content in juices was carried out in ten types of non- preserved juices from two companies (A and B), purchased in a chain of retail outlets. The analyzed juices in company A were: sauerkraut and carrot, grapefruit, orange, apple and mandarin, while in company B: orange, apple, apple and quince, grapefruit and mandarin. In test 1, the first ten juices were analyzed, in test 2 - another ten juices after one month, in test 3 - juices from test 2 were used, and three days after opening the package and storing the juices in standard refrigeration conditions, the stability test of AA was analyzed. The AA and TAA contents were determined using the high performance liquid chromatography (HPLC) method. The DHAA content was calculated by subtracting the AA content from the TAA content. Results. The highest TAA content was found in citrus juices, i.e. grapefruit, orange and mandarin, and the lowest in sauerkraut and carrot juices and apple juice. Moreover, ascorbic acid in apple juice was characterized by the lowest durability. Conclusions. In the production of non-preserved apple juice, consideration should be given to the natural protection of ascorbic acid by the addition of citrus or other fruit juice, vegetable juice or by using a mild technology in the production process.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2021, 72, 4; 373-379
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abattoir wastewater treatment and energy recovery using a ferricyanide-catholyte microbial fuel cell.
Autorzy:
Akaluka, C.K.
Orji, J.C.
Braide, W.
Egbadon, E.O.
Adeleye, S.A.
Powiązania:
https://bibliotekanauki.pl/articles/11752.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
The capacity of Microbial fuel cells (MFCs) to produce voltage and concurrently treat abattoir waste water was investigated in MFCs that used 0.1M potassium ferricyanide (K3[Fe(CN)6] as catholytes. Physicochemical, electrochemical and Microbiological properties of the MFCs were monitored. The open circuit voltage (OCV) readings were taken at 3 hours interval and maximum OCV of 965mV was recorded. Also, The physicochemical characteristics of the MFCs revealed that the pH decreased by 0.2 after treatment; Chemical Oxygen demand, biochemical oxygen demand, total suspended solids, ammonia, and total nitrogen reduced by 88.4%, 65.56%, 43.88%, 60% and 60% respectively. However, Phosphate increased by 54%. The bacterial isolates from the raw abattoir wastewater were Staphylococcus aureus, Bacillus cereus, Bacillus subtilis, Enterococcus faecalis, Enterobacter aerogenes, Escherichia coli and Micrococcus luteus while Enterococcus faecalis, Bacillus cereus and Escherichia coli were isolated from the biofilms on the anode. Microbial fuel cells therefore have capacities for simultaneous waste water treatment and electricity generation.
Źródło:
International Letters of Natural Sciences; 2016, 55
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical parameter of palm oil and soil from Ihube community, Okigwe, Imo State Nigeria
Autorzy:
Enyoh, C.E.
Ihionu, E.A.
Verla, A.W.
Ebosie, P.N.
Powiązania:
https://bibliotekanauki.pl/articles/11246.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2017, 62
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-Ray Diffraction and NMR Studies on Mixtures of Non-Ionic Surfactant (C$\text{}_{12}$EO$\text{}_{2}$) and Phospholipids (POPC)
Autorzy:
Funari, S. S.
di Vitta, C.
Rapp, G.
Powiązania:
https://bibliotekanauki.pl/articles/1964131.pdf
Data publikacji:
1997-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.10.+e
Opis:
We studied the temperature and concentration dependence of the POPC/C$\text{}_{12}$EO$\text{}_{2}$/water ternary system and identified and characterized the different phases occurring. The thermal behaviour is slightly dependent on the surfactant to lipid molar ratio R$\text{}_{s}\text{}_{/}\text{}_{l}$ . At low surfactant content the behaviour is similar to the binary lipid/water system. Similarly at low lipid contents the system behaves similarly to the surfactant/water mixture. However, at molar ratios R$\text{}_{s}\text{}_{/}\text{}_{l}$ between 2 and 3 a new hexagonal phase forms which is peculiar to the mixture. $\text{}^{2}$H NMR measurements indicated the existence of a lamellar phase containing also curved surfaces additional to the flat ones. The surface area per surfactant molecule was calculated to 0.23 nm$\text{}^{2}$ which is in good agreement with the cross-section of a paraffinic chain.
Źródło:
Acta Physica Polonica A; 1997, 91, 5; 953-960
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antioxidant and anti - inflammatory activities of a commercial noni juice revealed by carrageenan - induced paw edema
Autorzy:
Yilmazer, N.
Coskun, C.
Gurel-Gurevin, E.
Yaylim, I.
Eraltan, E.H.
Ikitimur-Armutak, E.I.
Powiązania:
https://bibliotekanauki.pl/articles/31929.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
This study aimed to investigate antioxidant and anti-inflammatory activities of a commercial product of noni (Morinda citrifolia) juice. Carrageenan-induced rat paw edema was employed as inflammatory model. One control and three experimental groups were formed. Experimental groups were administered noni juice alone, noni juice+carrageenan, and carrageenan alone. Oxidant and antioxidant capacity were determined by d-ROMs test and BAP test, respectively. Plasma concentrations of endothelin-1 and leptin were measured by ELISA. Measurements were performed at zero time and 2nd hour of inflammation. Oxidant capacity decreased in noni-received groups at 2nd hour (p=0.019). Antioxidant capacity of the group which received noni alone was found to be higher at 2nd hour (p=0.036). Plasma concentrations of endothelin-1 and leptin were notably lower in noni-received groups (p=0.001 and p=0.021, respectively). The results show that the commercial noni juice investigated has pronounced antioxidant and anti-inflammatory activities.
Źródło:
Polish Journal of Veterinary Sciences; 2016, 19, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected ruminal variables and purine urinary excretion rate of steers subjected to feeding, fasting, and re-feeding conditions
Autorzy:
Ortolani, E.L.
Maruta, C.A.
Barrêto Júnior, R.A.
Mori, C.S.
Antonelli, A.C.
Sucupira, M.C.A.
Minervino, A.H.H.
Powiązania:
https://bibliotekanauki.pl/articles/16539107.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
rumen
feed deprivation
pH
allantoin excretion
cattle
Opis:
The effects of feeding, fasting, and re-feeding on the ruminal profile of growing cattle were studied. Ruminal fluid and urine samples were obtained from 12 crossbred steers weighing approximately 300 kg during the following periods: 11 h of normal feeding (postprandial period), 48 consecutive hours of fasting, and followed by 48 h of re-feeding. Fasting promotes changes in the ruminal profile, such as an increase in ruminal pH, reduction in the number of rumen protozoa and bacteria, and decrease in the urinary excretion of allantoin; however, it does not change the urinary uric acid excretion rate. The overall mean ruminal pH was higher during fasting (7.53±0.27) in comparison to those at normal feeding (6.72±0.25) and re-feeding (6.62±0.31) (p<0.05). During re-feeding, the ruminal profile returned to normal, except for the protozoa count, which despite a slight increase only after 48 h of re-feeding, did not recover to baseline values.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 1; 175-182
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic rheology and microstructure of starch gels affected by triticale genomic composition and developing stage
Autorzy:
Cornejo-Ramirez, Y.I.
Cinco-Moroyoqui, F.J.
Carvajal-Millan, E.
Brown-Bojorquez, F.
Rosas-Burgos, E.C.
Burgos-Hernandez, A.
Martinez-Cruz, O.
Del Toro-Sanchez, C.L.
Powiązania:
https://bibliotekanauki.pl/articles/24257.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:
International Agrophysics; 2019, 33, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proposal for a biological environmental monitoring approach to be used in libraries and archives
Autorzy:
Pasquarella, C.
Saccani, E.
Sansebastiano, G.E.
Ugolotti, M.
Pasquariello, G.
Albertini, R.
Powiązania:
https://bibliotekanauki.pl/articles/51060.pdf
Data publikacji:
2012
Wydawca:
Instytut Medycyny Wsi
Opis:
In cultural-heritage-related indoor environments, biological particles represent a hazard not only for cultural property, but also for operators and visitors. Reliable environmental monitoring methods are essential for examining each situation and assessing the effectiveness of preventive measures. We propose an integrated approach to the study of biological pollution in indoor environments such as libraries and archives. This approach includes microbial air and surface sampling, as well as an investigation of allergens and pollens. Part of this monitoring plan has been applied at the Palatina Library in Parma, Italy. However, wider collections of data are needed to fully understand the phenomena related with biological contamination, define reliable contamination threshold values, and implement appropriate preventive measures.
Źródło:
Annals of Agricultural and Environmental Medicine; 2012, 19, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phosphorylation sites of HER2/c-erbB-2: role in cell growth and in disease
Autorzy:
Khurshid, Rukhshan
Saleem, Mahjabeen
Gul-e-Raana, -
Akhthar, Muhammad
Powiązania:
https://bibliotekanauki.pl/articles/1039198.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
phosphorylation sites
HER2/c-erbB-2
cell growth and disease
Opis:
The protein kinase c-erbB-2 belongs to the family of receptor tyrosine kinase and is involved in oncogenesis. The present study predicts different phosphorylation sites of HER2/c-erbB-2 which are important in preventing or developing cancer, especially breast cancer. Sequence homology showed highest homology (77%) with epidermal growth factor receptor kinase domain. According to PROSITE search result, active sites of c-erbB-2 are N-lobe (glycine rich phosphate binding loop). Catalytic loop with presumptive catalytically active of Asp108 is phosphorylated by tyrosine protein kinase. A-loop, activation loop, becomes phosphorylated and activates the substrate binding. The study strengthens our knowledge regarding HER2 signaling by the detection of uncharacterized signaling proteins, establishing phosphorylation of an activation loop and helps us to make assumptions about the role of such previously unidentified proteins. On the basis of importance of HER2 in breast cancer as well as in other diseases, this study provides fruitful information for designing new therapeutic strategies.
Źródło:
Acta Biochimica Polonica; 2014, 61, 4; 699-703
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Erratum to "Production of 18F by proton irradiation of C6H6NF and C6H5NF2". (Nukleonika 2011;56(4):269-276)
Autorzy:
Běták, E.
Mikołajczak, R.
Staniszewska, J.
Mikołajewski, S.
Rurarz, E.
Wojtkowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/146862.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Źródło:
Nukleonika; 2012, 57, 4; 642-642
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conversion within a decimal and binary numeral systems in C++ language
Konwersja w języku C++ między systemami dziesiątkowym i binarnym
Autorzy:
Witek, A. E.
Powiązania:
https://bibliotekanauki.pl/articles/135828.pdf
Data publikacji:
2013
Wydawca:
Wyższa Szkoła Techniczno-Ekonomiczna w Szczecinie
Tematy:
decimal numeral system
binary numerical system
programming
C++ language
decymalny system numeryczny
binarny system numeryczny
programowanie
język C++
Opis:
Introduction and aim: Converting numbers from one number system to another is an important skill, used commonly in millions of computers all over the world. However, even a beginner programmer should face the problem of converting numbers with the support of the programming language C++. This article shall briefly described two numeral systems, and after a short programming introduction in C++ the source code would be offered which easily converts a numbers within both systems. Material and methods: After a short introduction of programming in C++, there was proposed the program source code, which easily converts a numbers within both systems. To create the program the user will need some basic knowledge of the syntax of C++, a wide range of books and courses available in the market. Results: It is presented the program is written and compiled in Orwell Dev-C++ 5.1.1.0. Conclusion: Conversion of numbers within the two most common numerical systems is widespread, so the ability to create the source code, for example, in C++.
Wstęp i cel: Konwersja liczb w obrębie dwóch najbardziej rozpowszechnionych systemów liczbowych jest stosowana codziennie w milionach komputerowych umysłów na całym świecie. Jednak i początkujący programista może zmierzyć się z problemem konwersji liczb, przy wsparciu języka programowania C++. W niniejszym artykule pokrótce zostaną opisane dwa wspomniane systemy liczbowe, zaś po krótkim wstępie dotyczącym programowania w języku C++, zaproponowany oraz pokrótce opisany zostanie kod źródłowy programu, który w prosty sposób konwertuje liczby w obrębie obu systemów. Materiał i metody: Po krótkim wprowadzeniu do programowania w C++, został zaproponowany kod źródłowy programu, który łatwo przekształca liczby ciągu obu systemów. Aby utworzyć program, użytkownik musi posiadać podstawową wiedzę o składni C++, szeroki wybór podręczników i kursów dostępnych na rynku. Wyniki: Przedstawiono program napisany i skompilowany w Orwell Dev-C++ 5.1.1.0. Wniosek: Konwersja liczb w dwóch najbardziej powszechnych systemach numerycznych jest powszechne znana, to zdolność do tworzenia kodu źródłowego na przykład w C++.
Źródło:
Problemy Nauk Stosowanych; 2013, 1; 43-50
2300-6110
Pojawia się w:
Problemy Nauk Stosowanych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new capybara from the late Miocene of San Juan Province, Argentina, and its phylogenetic implications
Autorzy:
Cerdeno, E.
Perez, M.E.
Deschamps, C.M.
Contreras, V.H.
Powiązania:
https://bibliotekanauki.pl/articles/20827.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
A new hydrochoerine rodent, Cardiatherium calingastaense sp. nov. (Caviidae), is described based on the specimen INGEO-PV 87. It was recovered from the late Miocene Las Flores Formation, cropping out at the Puchuzum locality, San Juan Province, Argentina. The new species is based on a particular combination of characters, among which the following can be highlighted: p4 with internal fissures equally deep as in Cardiatherium paranense, secondary external fissure as in Cardiatherium patagonicum, and lacking the fifth internal fissure and supernumerary internal fissure, as in C. paranense; m3 with a conspicuous labial column in the posterior ramus of the second prism; very deep primary and secondary external fissures in upper cheek teeth, the former producing a labial strong step-shaped profile in M2; sagittal crest on the parietals; bullae small in ventral view; scars of the origin of the masseter medialis muscle with an anterior projection up to the level of the incisive foramen and the maxilla-premaxilla suture. The phylogenetic analysis supports the taxonomic proposal of creating a new species of Cardiatherium and shows C. calingastaense sp. nov. as the sister group of the other species of the genus. The lineage leading to the clade Cardiatherium + largest capybaras would have originated at least during the Chasicoan SALMA (early late Miocene). Cardiatherium calingastaense sp. nov. adds to the previous record of Cardiatherium chasicoense and Cardiatherium paranense in the late Miocene of San Juan and Mendoza provinces, respectively, thus increasing the diversity of capybaras in central-west Argentina.
Źródło:
Acta Palaeontologica Polonica; 2019, 64, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Źródła wiedzy na temat wirusowego zapalenia wątroby typu C i metod badań diagnostycznych
Sources of knowledge about hepatitis C and methods of diagnostics
Autorzy:
Kalinowski, K.
Kowalska, M.E.
Bojakowska, U.
Powiązania:
https://bibliotekanauki.pl/articles/4027.pdf
Data publikacji:
2014
Wydawca:
Instytut Medycyny Wsi
Opis:
Wprowadzenie i cel pracy. Wirusowe zapalenie wątroby typu C ze względu na bezobjawowy przebieg oraz brak skutecznej szczepionki zostało uznane przez Światową Organizację Zdrowia za jedno z największych zagrożeń epidemiologicznych. Celem pracy jest analiza źródeł wiedzy na temat wirusowego zapalenia wątroby typu C, poznanie wiedzy grupy badanych na temat możliwości wykrycia wirusa HCV w organizmie oraz poznanie opinii ankietowanych na temat poziomu poinformowania populacji polskiej na temat tej choroby. Materiał i metody. Badanie ankietowe zostało przeprowadzone wśród 115 osób zamieszkałych na terenie województwa lubelskiego w wieku od 32 do 55 lat. Uzyskane wyniki badań zostały poddane analizie statystycznej z wykorzystaniem testu chi-kwadrat oraz współczynnika korelacji V Cramera. Wyniki. Zdecydowana większość badanych ma wiedzę dotyczącą możliwości wykonywania badań diagnostycznych w kierunku zakażenia HCV. Wyniki badań wykazały, iż głównym obecnym źródłem wiedzy badanej grupy na temat wirusowego zapalenia wątroby typu C jest telewizja. Natomiast, za wiarygodne źródło informacji respondenci uznali lekarza rodzinnego, od którego chcieliby uzyskać informacje na ten temat. Jednocześnie ponad 80% ankietowanych przyznało, że niewiele wie o wirusowym zapaleniu wątroby typu C. Wnioski. Badana grupa posiada wiedzę na temat badań diagnostycznych wykrywających zakażenie HCV. Respondenci przyznali, że ich wiedza na temat wirusowego zapalenia wątroby typu C jest niewielka oraz chcieliby dowiedzieć się na ten temat więcej. Analiza opinii ankietowanych ustaliła, że wiarygodnym źródłem wiedzy na temat tej choroby jest personel medyczny.
Introduction and aim. Hepatitis C has been recognized by the World Health Organization as one of the largest epidemiological risks because of its asymptomatic course and lack of an effective vaccine. The aim of this study is to analyze the sources of knowledge about hepatitis C and methods of diagnostics of the hepatitis C virus, and to identify the opinions of respondents on the level of the information about the disease in the Polish population. Material and methods. A survey was conducted among 115 people living in the Lublin province, aged 32–55 years. The obtained results were statistically analyzed using the Chi-2 and Cramer›s V correlation coefficient. Results. The great majority of respondents had knowledge of the ability to perform diagnostic tests for HCV. The results showed that the main source of current knowledge about hepatitis C in respondents is television. However, respondents considered the family doctor a reliable source of information about the disease. At the same time, more than 80% of respondents stated that they had insufficient knowledge about hepatitis C. Conclusions. The study group is aware of the diagnostic tests for the detection of HCV infection. Respondents admitted that their knowledge about hepatitis C is small and would like to learn more about it. Analysis surveyed agreed that a reliable source of knowledge about the disease is the medical staff.
Źródło:
Medycyna Ogólna i Nauki o Zdrowiu; 2014, 20(49), 1
2083-4543
Pojawia się w:
Medycyna Ogólna i Nauki o Zdrowiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dolomite and calcite enhancement of whey protein isolate hydrogels
Autorzy:
Norris, K.
Tsang, S. C.
Kerns, J. G.
Kłosek-Wawrzyn, E.
Jaegermann, Z.
Douglas, T. E. L.
Powiązania:
https://bibliotekanauki.pl/articles/285345.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogels
dolomite
calcite
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 98
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morpholigica similarity and genetic variation of Trochulus striolatus (C. Pffeiffer, 1825) and Trochulus montanus (Studer, 1820) (gastropoda, pulmonata, hygromidae)
Autorzy:
Prockow, M.
Strzala, T.
Kuznik-Kowalska, E.
Powiązania:
https://bibliotekanauki.pl/articles/84609.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Źródło:
Folia Malacologica; 2013, 21, 3
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Long-term changes and spatial variability of mollusc communities in a lowland reservoir (Zegrzynski Reservoir, C Poland)
Autorzy:
Jurkiewicz-Karnkowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/84574.pdf
Data publikacji:
2001
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Opis:
Studies on spatial diversity in species composition, dominance patterns and abundance of malacocenoses in the Zegrzyñski Reservoir were carried out in the late 1990s, and changes since the 80s were assessed. The malacocenoses of the reservoir in the 90s were characterized by a considerable structural diversity and varied abundance. The species diversity was higher in the littoral while the abundance was generally higher in habitats located farther from the shore. After a period of rapid development of the 80s, in the 90s the malacofauna stabilised at a lower level of abundance and species richness, while the dominance patterns became more pronounced. The phenomenon could be related to progressive eutrophication as well as ageing of the reservoir. Compared to other dam reservoirs the mollusc fauna of the Zegrzyñski Reservoir is still quite rich in terms of both abundance and number of species.
Źródło:
Folia Malacologica; 2001, 09, 3
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synchrotron Radiation in Biology and Medicine
Autorzy:
Pełka, J.
Powiązania:
https://bibliotekanauki.pl/articles/1812240.pdf
Data publikacji:
2008-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.57.-s
87.59.-e
07.85.Fv
07.90.+c
Opis:
This work is focused on a present status of synchrotron radiation X-ray applications in medicine and biology to imaging, diagnostics, and radiotherapy. Properties of X-ray beams generated by synchrotron sources are compared with radiation produced by classical laboratory X-ray tubes. A list of operating and planned synchrotron facilities applicable to biomedical purposes is given, together with their basic characteristics. A concise overview of typical X-ray synchrotron techniques in biology and medicine is carried out with discussion of their specific properties and examples of typical results.
Źródło:
Acta Physica Polonica A; 2008, 114, 2; 309-329
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of crude oil and detergent on the arysulphatase (E.C.3.1.6.1.) activity in Euphausia superba and E. crystallorophias
Autorzy:
Drewa, Gerard
Powiązania:
https://bibliotekanauki.pl/articles/2058050.pdf
Data publikacji:
1981
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
alkylbenzene sulphonate (ABS)
arylsulphatase (ASA)
nitrocatechol sulphate(NCS)
4-nitrocatechol (4-NC)
Źródło:
Polish Polar Research; 1981, 2, 3-4; 119-132
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integrating Two Feedback Queuing Discipline into Cognitive Radio Channel Aggregation
Autorzy:
Esenogho, E.
Mambou, E. N.
Ferreira, H. C.
Powiązania:
https://bibliotekanauki.pl/articles/226390.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cognitive radio
channel aggregation
primary and secondary users
queue discipline
Opis:
Queuing regime is one outstanding approach in improving channel aggregation. If well designed and incorporated with carefully selected parameters, it enhances the smooth rollout of fifth/next generation wireless networks. While channel aggregation is the merging of scattered TV white space (spectrum holes) into one usable chunk for secondary users (SU). The queuing regime ensures that these unlicensed users (SUs) traffic/services are not interrupted permanently (blocked/dropped or forced to terminate) in the event of the licensed users (primary user) arrival. However, SUs are not identical in terms of traffic class and bandwidth consumption hence, they are classified as real time and non-real time SU respectively. Several of these strategies have been studied considering queuing regime with a single feedback queuing discipline. In furtherance to previous proposed work with single feedback queuing regime, this paper proposes, develops and compares channel aggregation policies with two feedback queuing regimes for the different classes of SUs. The investigation aims at identifying the impacts of the twofeedback queuing regime on the performance of the secondary network such that any SU that has not completed its ongoing service are queued in their respective buffers. The performance is evaluated through a simulation framework. The results validate that with a well-designed queuing regime, capacity, access and other indices are improved with significant decrease in blocking and forced termination probabilities respectively.
Źródło:
International Journal of Electronics and Telecommunications; 2018, 64, 4; 519-525
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production of 18F by proton irradiation of C6H6NF and C6H5NF2
Autorzy:
Běták, E.
Mikołajczak, R.
Staniszewska, J.
Mikołajewski, S.
Rurarz, E.
Wojtkowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/147609.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radiopharmaceuticals
positron emitters
radiochemistry
18F
cyclotron
production cross section
Opis:
Fluorin--18 can be produced directly by the (p,pn) reaction and also indirectly by the (p,2n) reaction on the 19F target. The overall cross section for both routes is 108 plus or minus 20 mb at 22.5 plus or minus 2.5 MeV. In this work, we obtained 18F, using 25 MeV protons on 2\--fluoroaniline and 2,4-difluoroaniline targets. The chemical separation yield was 46 š 7% and 47 plus or minus 12% for 2-fluoroaniline and 2,4-difluoroaniline, respectively. Low-current 1 h irradiations led to 90 mi Ci of 18F produced from 2-fluoroaniline bombarded with a 70 nA beam (in good agreement with the theoretical value, 96 mi Ci) and to 76 mi Ci of 18F in case of 2,4-difluoroaniline and a 33 nA beam (prediction 85 mi Ci). Both values are close to the thick target result reported by Dmitriev and Molin [4] for 22 MeV protons.
Źródło:
Nukleonika; 2011, 56, 4; 269-276
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development factors for cross-border B2C e-commerce in the world and in Poland
Uwarunkowania rozwoju transgranicznego handlu elektronicznego B2C na świecie i w Polsce
Autorzy:
Strzebicki, D.
Powiązania:
https://bibliotekanauki.pl/articles/37847.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:
Porównanie zużycia energii, zawartości witaminy C oraz barwy kostki ziemniaczanej podczas blanszowania wodnego i mikrofalowego
A comparison of energy consumption, vitamin C content and colour of potato cubes during water and microwave blanching
Autorzy:
Janus, P.
Radziejowska-Kubzdela, E.
Powiązania:
https://bibliotekanauki.pl/articles/228953.pdf
Data publikacji:
2007
Wydawca:
Wyższa Szkoła Menedżerska w Warszawie
Opis:
W zaprezentowanej w artykule pracy porównano zużycie energii elektrycznej, zawartość witaminy C oraz barwy kostki ziemniaczanej podczas blanszowania wodnego i mikrofalowego. Test na aktywność peroksydazy przeprowadzono po blanszowaniu. Wynik testu decydował o długości czasu prowadzenia procesu. Blanszowanie mikrofalowe kostki ziemniaczanej powoduje mniejsze zużycie energii elektrycznej niż blanszowanie wodne. Powoduje ono mniejsze straty witaminy C, ale gorzej wpływa na zachowanie barwy surowca w porównaniu z blanszowaniem wodnym.
The study compared electric energy consumption, witamin C content and colour of potato cubes during water and microwave blanching. The peroxidase activity test was performer after blanching. Testing results determined the length of the process. Microwave blanching of potato cubes cause less electric energy consumption than water blanching. It results in lower losses of vitamin C, but has a more adverse effect on colour of the raw material in comparison to water blanching.
Źródło:
Postępy Techniki Przetwórstwa Spożywczego; 2007, 2; 58-61
0867-793X
2719-3691
Pojawia się w:
Postępy Techniki Przetwórstwa Spożywczego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acceptance of illness and satisfaction with life among patients with arterial hypertension
Autorzy:
Baczewska, B.
Kropornicka, B.
Sepioło, J.
Krzyżanowska, E.
Olszak, C.
Szymczuk, E.
Daniluk, J.
Powiązania:
https://bibliotekanauki.pl/articles/2052373.pdf
Data publikacji:
2015
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
acceptance
satisfaction
hypertension
illness
Opis:
The aim of this study was to determine and compare the degree of acceptance of the disease and the level of satisfaction with life among people with diagnosed hypertension. The research was carried out by means of a diagnostic survey. The study used the scale of AIS - Approval Illness Scale (Acceptance of Illness Scale). For measuring life satisfaction ladder Cantrill was used. It assessed satisfaction with life on a scale from 0 to 10. The study was conducted in June 2014 among the residents of Lubelskie and Świętokrzyskie voivodships. The study was anonymous. The approval of the Bioethics Committee at the Medical University of Lublin (KE-0254/176/2014) was received for carrying out the tests. The study included patients diagnosed with hypertension – total of 154 people. The study has shown the average degree of acceptance of the disease. Illness and healing therapy did not impact negatively the functioning of most respondents. The respondents described their adaptation to the limitations imposed by the disease in different degrees. The vast majority of respondents did not have any problems arising from the disease and did not abandon their favorite activities. Every third respondent with hypertension felt as being a defective person and dependent on other people. The relation between satisfaction with their own lives, and the level of acceptance of the disease was concluded in that study. The higher the degree of satisfaction with patients’ lives, the higher the acceptance of illness. Studies have shown positive correlations between gender, age, place of residence, duration of illness and education, and acceptance of the disease. In contrast, there was no statistically significant association between marital status and the test subject.
Źródło:
Health Problems of Civilization; 2015, 09, 3; 31-38
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of diabetes and diabetes complications on hand dexterity and quality of life – a quantitative study
Autorzy:
Lewko, J.
Sadowska, E.
Sierzantowicz, R.
Lewko, K.
Lukaszuk, C.R.
Powiązania:
https://bibliotekanauki.pl/articles/3561.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Źródło:
Journal of Pre-Clinical and Clinical Research; 2019, 13, 2
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biochemical and Physiological Characteristic: A Review
Miscanthus – trawa niezwykła: charakterystyka biochemiczno--fizjologiczna: przegląd literaturowy
Autorzy:
Sacała, E.
Powiązania:
https://bibliotekanauki.pl/articles/388845.pdf
Data publikacji:
2011
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
miskantus
tolerancja na chłód
C4 fotosynteza
fitoremediacja
allelopatia
C4 photosynthesis
chilling tolerance
phytoremediation
allelopathy
Opis:
Miscanthus × giganteus (Giant Miscanthus) is one of the most promising plants cultivated for biomass production. In spite of its origin from south-east Asia and being warm adapted plant it grows well and produces high biomass in temperate latitudes. Miscanthus × giganteus is a C4 plant and hence this study presents a brief description of C4 photosynthesis and the enzymes involved in this process. On the basis of data from current literature, the biochemical bases of relatively high tolerance of miscanthus to cold temperatures (0–15 oC) were evaluated. Moreover, it was reviewed numerous ecophysiological features of Miscanthus × giganteus were reviewed (high productivity, low fertiliser and pesticides requirements, possibility to use in phytoremediation) which showed that it is a proecological and environmentally friendly crop. This causes that Miscanthus × giganteus might be recognize as a leading crop in non-food cultivations.
Miscanthus × giganteus (Miskant olbrzymi) jest jedną z bardziej obiecujących tzw. Roślin alternatywnych uprawianych z przeznaczeniem na cele energetyczne. Pomimo że pochodzi z południowo- Miscanthus -wschodniej Azji i jest rośliną ciepłolubną, to bardzo dobrze rośnie i charakteryzuje się wysoką produktywności ą w strefie umiarkowanych szerokości geograficznych. Miscanthus × giganteus jest rośliną typu C4, dlatego w pracy przedstawiono krótki opis procesu fotosyntetycznego wiązania CO2 w tzw. szlaku C4 oraz uczestniczących w nim enzymów. Korzystając z najnowszych danych literaturowych, przeanalizowano podstawy biochemiczne stosunkowo dużej odporności tej rośliny na niskie temperatury (0-15 oC). Opisano również szereg ekofizjologicznych właściwości Miscanthus × giganteus (wysoka produktywność, niewielkie wymagania nawozowe, brak konieczności stosowania pestycydów, możliwość wykorzystania w procesach fitoremediacji), które sprawiają, że jest on określany jako roślina ekologiczna i szczególnie przyjazna środowisku. Opisane cechy rośliny sprawiają, że można ją uznać za lidera wśród roślin uprawianych na cele nieżywnościowe.
Źródło:
Ecological Chemistry and Engineering. A; 2011, 18, 12; 1615-1624
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth factor and cytokine interactions in myogenesis Part II Expression of IGF binding proteins and protein kinases essential for myogenesis in mouse C2C12 myogenic cells exposed to TNF- alpha and IFN- gamma
Autorzy:
Wieteska-Skrzeczynska, W.
Grzelkowska-Kowalczyk, K.
Rejmak, E.
Powiązania:
https://bibliotekanauki.pl/articles/30923.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The aim of the study was to examine potential interactions among IGF-I and proinflammatory cytokines, TNF-α and IFN-γ, in the regulation of local IGF-I bioavailability and cellular proteins mediating myogenic signals. We investigated levels of IGFBP-4, -5, -6, protein kinase Czeta (PKCζ), p38 and extracellular signal-regulated kinase (ERK1/2) in differentiating mouse C2C12 myoblasts. IGF-I significantly stimulated expression of IGFBP-5. TNF-α and IFN-γ attenuated the expression of IGFBP-4 and -6 under basal conditions and in the presence of IGF-I, and inhibited IGF-I-induced IGFBP-5 expression during 5-day myogenesis. TNF-α and IFN-γ markedly attenuated p38 expression in the presence of IGF-I on the 5th day of myogenesis. When combined with IGF-I the cytokines exerted opposite effects on the PKCζ level, i.e. TNF-α caused an increase, whereas IFN-γ reduced the cellular content of this kinase. Exposition of C2C12 myoblasts to IGF-I or cytokines led to the stimulation of ERK1/2 phosphorylation; however, both TNF-α and IFN-γ exerted an inhibitory effect on the activation of ERK1/2 in myoblasts cultured in the presence of IGF-I. We concluded as follows: i) TNF-α and IFN-γ present in the extracellular environment of differentiating C2C12 myoblasts can alter the local bioavailability of IGF-I by inhibiting the expression of IGFBP-4, -5, and -6, ii) the decrease in p38 expression and ERK1/2 phosphorylation in C2C12 myoblasts exposed to cytokines can lead to disturbances in IGF-I-regulated myogenesis.
Źródło:
Polish Journal of Veterinary Sciences; 2011, 14, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zawartość witaminy C i pojemność przeciwutleniająca owoców i przecierów z żurawiny błotnej i wielkoowocowej
Content of vitamin C and antioxidant capacity of wild and cultivated cranberry fruit and of their pulps
Autorzy:
Mazur, B.
Borowska, E.J.
Polak, M.
Powiązania:
https://bibliotekanauki.pl/articles/826347.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Technologów Żywności
Tematy:
odmiany roslin
odmiany hodowlane
owoce
pojemnosc przeciwutleniajaca
przeciery owocowe
witamina C
zawartosc witamin
zurawina blotna
zurawina wielkoowocowa
Opis:
W pracy oznaczono zawartość witaminy C, jako sumę kwasu L-askorbinowego i dehydroaskorbinowego, oraz aktywność przeciwutleniającą z rodnikami ABTS+ w owocach żurawiny: błotnej i odmian uprawnych (Ben Lear, Bergman, Early Richard, Stevens i Pilgrim) oraz w otrzymanych z tych owoców przecierach. Owoce żurawiny błotnej i odmian uprawnych charakteryzowały się zróżnicowaną zawartością witaminy C – od 11,70 mg/100 g ś.m. (Bergman) do 26,77 mg/100 g ś.m. (Stevens). Ubytek witaminy C w przecierach w porównaniu z surowcem był zróżnicowany w zależności od odmiany owoców; największy odnotowano w przecierach z owoców odmiany Stevens (91 %), najmniejszy w przecierze z owoców odmiany Pilgrim (23 %). Pojemność przeciwutleniająca (TAS) owoców badanych odmian żurawiny była zbliżona i nie różniła się statystycznie istotnie (p < 0,05). Proces technologiczny otrzymywania przecierów spowodował zmniejszenie pojemności przeciwutleniającej (TAS) o ok. 35 %. Uzyskane wyniki mogą wskazywać, że witamina C nie jest dominującym składnikiem determinującym pojemność przeciwutleniającą owoców żurawiny i otrzymanych przecierów.
In the paper, there were determined the content of vitamin C, expressed as a total content of L-ascorbin and dehydroascorbin acids, and antioxidant activity with ABTS radicals in fruit of wild and cultivated varieties of cranberry (Ben Lear, Bergman, Early Richard, Stevens, and Pilgrim cultivars), as well as in the pulps thereof. The fruit of wild and cultivated cranberry cultivars were characterized by a varying content of vitamin C ranging from 11.70 mg/100 g f.m. (Bergman) to 26.77 mg/100 g f.m. (Stevens). In the pulps of this fruit, the content of vitamin C decreased compared to the raw material, and this decrease varied depending on the fruit varieties; the highest decrease was found in the pulps made of the Stevens cultivar (91 %), whereas the lowest in the pulps of the Pilgrim cultivar (23 %). The antioxidant capacity (TAS) of fruit of the studied cranberry fruit cultivars was similar and did not differ statistically significant (p < 0.05). The technological process of manufacturing pulps caused the antioxidant activity (TAS) to decrease by ca. 35 %. The results obtained can be the evidence that the vitamin C is not a dominant compound determining antioxidant capacity of cranberry fruit and of the pulps made thereof.
Źródło:
Żywność Nauka Technologia Jakość; 2009, 16, 2
1425-6959
Pojawia się w:
Żywność Nauka Technologia Jakość
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The e-commerce logistics models of Polish clothing companies and their impacts on sustainable development
Autorzy:
Milewska, Beata
Powiązania:
https://bibliotekanauki.pl/articles/135332.pdf
Data publikacji:
2019
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
e-commerce
sustainable development
clothing industry
logistics
distribution
B2C
natural environment
society
Opis:
This paper discusses logistics models of e-commerce implemented by Polish clothing companies. The author has conducted research on Polish clothing companies and logistics operators serving e-commerce branches, and here presents and compares these models. There are various logistics models of e-commerce, which differ from each other in organisation of deliveries, level of outsourcing, location for keeping stocks, level of logistics in customer service, and organisation of returns (goods returned by customers). The impact of the different e-commerce models on ecological, economic, and social priorities is then discussed.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 60 (132); 140-146
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reproductive Performance of ASF-recovered Pigs in South-West Nigeria
Autorzy:
Adeoye, A. A.
Udoh, J. E.
Ikeobi, C. O. N.
Adebambo, O. A.
Rotimi, E. A.
Powiązania:
https://bibliotekanauki.pl/articles/1182907.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ASF; Litter traits and Pigs
Opis:
This study was carried out to investigate litter traits performance of ASF-recovered pigs at Teaching and Research Farm of Federal University of Agriculture, Abeokuta. Data were collected on 52 progenies farrowed by eight (8) sows and two (2) boars, comprising of four (4) Large White sows, two (2) Large Black sows, two (2) Duroc sows, one (1) Large White boar and one (1) NigerHyb boar. These are survivals from ASF outbreak in 2005. Data were collected on the litter traits and subjected to General Linear Model (GLM) procedure using SAS, (1999) statistical package. Results obtained revealed that the litter traits estimates for the cross among the Large White were 6.52±0.26 (litter size at birth), 5.72±0.23 (litter size at weaning), 6.92±0.34 kg (litter weight at birth), 1.05±0.01 kg (average pig weight at birth), 7.08±0.35 (average pig weight at weaning), 12% (pre-weaning mortality) and sex ratio at birth (52%) and at weaning (54%). In the crosses between Duroc and NigerHyb, and Large Black and NigerHyb, effect of dam genotype was significant (P<0.01) on litter weight at birth and weaning, litter size at weaning and average pig weight at birth, higher values were observed in the cross between Large Black and NigerHyb, but not significant on litter size at birth and average pig weight at weaning. The litter traits estimates observed in this study are similar to those reported before the outbreak of ASF in 1997 in Nigeria.
Źródło:
World Scientific News; 2016, 53, 3; 417-429
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of titanium alloy modified with a-C:N:H and a-SiCxNY(H) coatings on adhesion and immune response of human osteoblast-like MG-63 cells
Autorzy:
Ścisłowska-Czarnecka, A.
Menaszek, E.
Kołaczkowska, E.
Januś, M.
Stypuła, B.
Powiązania:
https://bibliotekanauki.pl/articles/284995.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
titanium alloy
a-C:N:H and a-SiCxNy(H) coatings
osteoblast-like MG-63 cells
cell adhesion
cytokines
Opis:
The study was conducted in order to determine the effects of modified titanium alloy (Ti-6Al-4V) surfaces on the biological response of a human osteoblast-like cell line. MG-63 cells were cultured on disk-shaped Ti-alloys: unmodified, and covered with a-C:N:H or a-SiCxNy(H) layers. Interactions between materials and cells were examined through determination of cells adhesion and secretion of cytokines involved in the development of immune response.
Źródło:
Engineering of Biomaterials; 2008, 11, no. 81-84; 126-128
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany zawartości witaminy C i karotenoidów w przechowywanych suszach marchwi i ziemniaka
Changes in the content of vitamin C and carotenoids during dried carrot and potato storage
Autorzy:
Nowacka, M.
Witrowa-Rajchert, D.
Strachota, W.
Sobczak, E.
Powiązania:
https://bibliotekanauki.pl/articles/35026.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
marchew
ziemniaki
susze warzywne
susz ziemniaczany
przechowywanie
witamina C
zawartosc witaminy C
karotenoidy
zawartosc karotenoidow
zmiany przechowalnicze
carrot
potato
dried vegetable
dried potato
storage
vitamin C
vitamin C content
carotenoid
carotenoid content
storage change
Opis:
W pracy określono wpływ czasu i temperatury przechowywania na zawartość witaminy C w ziemniaku i karotenoidów w marchwi uzyskanych na drodze suszenia promiennikowo-konwekcyjnego i konwekcyjnego. Wyznaczono stałe szybkości reakcji oraz energię aktywacji rozkładu witaminy C i karotenoidów podczas przechowywania warzyw. Wraz ze wzrostem czasu przechowywania i temperatury następowało zwiększenie szybkości rozkładu witaminy C w suszach z ziemniaka. Karotenoidy w suszonej marchwi szybciej ulegały degradacji w wyższych temperaturach (25 i 40°C), w których stała szybkości reakcji była około 2-krotnie wyższa w porównaniu do stałej szybkości reakcji w niższej temperaturze przechowywania (4°C). Susz promiennikowo-konwekcyjny charakteryzował się niższą wartością bariery energetycznej, po której rozpoczynał się rozkład karotenoidów w marchwi i witaminy C w ziemniaku, w porównaniu z suszem konwekcyjnym.
The aim of this study was to examine the influence of storage time and conditions on the content of vitamin C (potato) and carotenoids (carrots) in dried carrots and potatoes obtained by infrared-convective and convective drying. Reaction rate constants and activation energy of vitamins and carotenoids degradation were specified during storage of dried vegetables. With increase of storage time and temperature there was an increase in the speed of vitamin C degradation in dried potato. In dried carrot, carotenoids decrease at higher temperatures (25 and 40°C) and the reaction rate constant were about twice higher from the reaction rate constant at lower temperature of storage (4°C). Infrared-convective dried material was characterised by lower values of the activation energy, after which the degradation of carotenoids in carrots and vitamin C in potatoes began, compared to convective drying.
Źródło:
Acta Agrophysica; 2011, 17, 1[188]
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of cover crops and different doses of herbicides on the yield and quality of soybean grown in direct sowing
Autorzy:
Harasim, E.
Kwiatkowski, C.
Gawęda, D.
Gocół, M.
Powiązania:
https://bibliotekanauki.pl/articles/11855254.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
Soybeans serve as one of the most valuable crops in many countries, including Poland, due to the high nutritional value of its seeds, its resistance to diseases and pests. Under the climatic conditions of Poland, soybean yield is largely dependent on weather conditions in a particular growing season, primarily temperature and rainfall. The aim of this study was to evaluate the effect of cover crops (winter rye, winter oilseed rape, and white mustard), mulching method (aboveground biomass mulching after mowing or desiccation) and reduced herbicide rates (down to 75 and 50% of the recommended rate) on soybean seed quality and yield. The present study showed that the weather conditions in the particular study seasons and mulching treatments caused the greatest variation in soybean seed yield and its quality. The highest yield was obtained from control treatments, desiccated winter rye and white mustard. The applied herbicide rates did not cause variations in seed yield and yield component traits. The protein and oil content was affected by the type of the mulch plant used. Mulch with rye and winter rape favors increased protein content, while more oil seed were accumulating after the white mustard and both mulch forms of rape.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2017, 16, 1; 121-132
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Human microbiome diversity: implications in health, disease, and applications
Autorzy:
Mboto, C. I.
Edet, U. O.
Mbim, E. N.
Zenoh, D. A.
Umego, C. F.
Odidi, F. S.
Tarh, J.
Upula, S. A.
Powiązania:
https://bibliotekanauki.pl/articles/1109197.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Human microbiome
applications of microbiome
gut
health and disease
Opis:
The human microbiome is a complex collection of microorganisms, including their genes and the metabolites colonizing the human body, and playing various functions in health and disease. The arrival of culture-independent molecular techniques such as metagenomics, transcriptomics, proteomics, and metabolomics have removed the limitations imposed by culture-dependent techniques. These advanced techniques have also brought about some paradigm shifts in what is known about the structural and functional diversities of the human microbiome in health and disease. The dynamics of the human microbiome is implicated in a number of human gastrointestinal and non-gastrointestinal diseases. This makes it a contemporary issue in biological and medical sciences. Of interest, some applications have already emerged for the human microbiome. These include being the source of antimicrobial substances, faecal microbiome therapy, probiotics, prebiotics and phage therapy. Given that a number of factors can alter the host microbiome - such as environment, lifestyle, stage of life, occupation, mode of delivery, therapy and so on, there is a need for more human microbiome projects that will help to capture these diversities in various continents. Furthermore, for the full impact of the various applications (both potentials and current) of human microbiome to be felt, there is need for more studies that will fully elucidate their physiology in humans.
Źródło:
World News of Natural Sciences; 2018, 21; 98-117
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Smart wireless sensor network and configuration of algorithms for condition monitoring applications
Autorzy:
Uhlmann, E.
Laghmouchi, A.
Geisert, C.
Hohwieler, E.
Powiązania:
https://bibliotekanauki.pl/articles/99644.pdf
Data publikacji:
2017
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
condition monitoring
data analysis
sensor network
algorithm
MEMS sensor
cloud
Opis:
Due to high demand on availability of production systems, condition monitoring is increasingly important. In recent years, the technical development have improved for realization of condition monitoring applications as a result of technological progress in fields such as sensor technology, computer performance and communication technology. Especially, the approaches of Industrie 4.0 and the use of the Internet of Things (IoT) technologies offer high potential to implement condition monitoring solutions. The connection of several sensor data of components to the cloud allows the identification of anomalies or defect pattern, this information can be used for predictive maintenance and new data-driven business models in production industry. This paper illustrates a concept of a smart wireless sensor network for condition monitoring application based on simple electronic components such as the single-board computer Raspberry Pi 2 modules and MEMS (Micro-Electro-Mechanical Systems) vibration sensors and communication standards MQTT (Message Queue Telemetry Transport). The communication architecture used for decentralized data analysis using machine learning algorithms and connection to the cloud is explained. Furthermore, a procedure for rapid configuration of condition monitoring algorithms to classify the current condition of the component is demonstrated.
Źródło:
Journal of Machine Engineering; 2017, 17, 2; 45-55
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of reduced and traditional tillage on soil properties and diversity of diatoms under winter wheat
Autorzy:
Stanek-Tarkowska, J.
Czyz, E.A.
Dexter, A.R.
Slawinski, C.
Powiązania:
https://bibliotekanauki.pl/articles/26476.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:
International Agrophysics; 2018, 32, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological, topographical and FTIR characterizations of Pd–C films
Autorzy:
Rymarczyk, J.
Kamińska, A.
Kęczkowska, J.
Kozłowski, M.
Czerwosz, E.
Powiązania:
https://bibliotekanauki.pl/articles/173595.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
palladium nanocrystals
fullerene
PVD
Opis:
The structure, topography and morphology of Pd–C films were studied by AFM (atomic force microscopy), SEM (scanning electron microscopy), Raman and FTIR (Fourier transform infrared spectroscopy) methods. It was found that an increasing content of palladium in films causes a decrease in their roughness and size of nanograins. The topography and morphology of Pd–C films depend on the content of palladium in the film, what was found from the analysis of SEM and AFM images. FTIR and Raman spectra show that the content of fullerene and palladium in the film strongly depends on technological parameters of PVD (physical vapor deposition) process.
Źródło:
Optica Applicata; 2013, 43, 1; 123-132
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mouthwash and Oral Cancer Risk Quantitative Meta-analysis of Epidemiologic Studies
Autorzy:
Gandini, S.
Negri, E.
Boffetta, P.
La Vecchia, C.
Boyle, P.
Powiązania:
https://bibliotekanauki.pl/articles/51852.pdf
Data publikacji:
2012
Wydawca:
Instytut Medycyny Wsi
Opis:
Background: Use of mouthwash and an increased risk of oral cancer has been a source of controversy for decades. A metaanalysis of epidemiological studies of mouthwash and oral cancer and, specifically, mouthwash containing >25% alcohol, was undertaken. Methods: Summary estimates were obtained with maximum likelihood estimates from random effects models. Sensitivity analyses were conducted to evaluate the influence of various inclusion. Results: Eighteen studies were included in the meta-analysis. There was no statistically significant associations found between regular use of mouthwash and risk of oral cancer (RR=1.13; 95% CI (0.95-1.35)). There was no significant trend in risk of oral cancer associated with increased daily usage of mouthwash (p=0.11). There was no association between reported use of mouthwash specifically containing alcohol and risk of oral cancer (RR=1.16; 95% CI (0.44, 3.08)). Conclusions: This quantitative analysis of mouthwash use and oral malignancy revealed no statistically significant associations between mouthwash use and risk of oral cancer, nor any significant trend in risk with increasing daily use; and no association between use of mouthwash containing alcohol and oral cancer risk.
Źródło:
Annals of Agricultural and Environmental Medicine; 2012, 19, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and richness of malacocenoses in habitats populated to various degree by Dreissena polymarpha (Pall.) - Sulejowski reservoir, C. Poland
Autorzy:
Jurkiewicz-Karnkowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/83530.pdf
Data publikacji:
2001
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Źródło:
Folia Malacologica; 2001, 09, 2
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of cooking methods on vitamin C, nitrates and nitrites contents and sensory quality in Brussels sprouts
Autorzy:
Czarniecka, E.
Kowalska, K.
Zalewski, S.
Powiązania:
https://bibliotekanauki.pl/articles/1371586.pdf
Data publikacji:
1993
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
diet
vitamin C
human diet
nitrite
cooking
human nutrition
food
Brussels sprout
sensory quality
vegetable
nitrate
Źródło:
Polish Journal of Food and Nutrition Sciences; 1993, 02, 4; 85-92
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Uncertainty Contributions of Measurement Surface and Number of Microphone Positions in Determination of Sound Power Levels
Autorzy:
Bilgic, E.
Mutaf, H.
Kirbas, C.
Sadikoglu, E.
Powiązania:
https://bibliotekanauki.pl/articles/1031890.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
06.20.Dk
06.20.fb
Opis:
Sound power level of a noise source is determined by means of sound pressure level or sound intensity level measurements performed in accordance to relevant ISO standards. The determination of sound power level according to ISO 3744, 3745 and 3746 standards is used for free field or for approximated free field conditions. Kinds of measurement surfaces, enveloping the noise source, number of microphones and their positions over the measurement surface are stated in the applied ISO standard. The effects of measurement surface and number of microphone positions on the determination of sound power level were investigated theoretically. As a measurement surface; hemisphere, parallelepiped rectangular box and cylindrical surfaces were selected. Key and additional microphone positions were taken into account in the calculations as well. Sound pressure levels of a commercially available reference sound source were measured in hemi-anechoic room using FFT with 4 Hz steps and also at 1/1, 1/3, 1/12 and 1/24 octave bands for all surfaces defined in ISO 3744 and 3746 standards. Sound power level, directivity index and uncertainty contributions resulting from measurement surfaces and number of microphone positions were calculated by using data obtained in measurements. In this paper the theoretical and experimental results are presented.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 642-649
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nielsen theory of transversal fixed point sets (with an appendix: $C^∞$ and $C^0$ fixed point sets are the same, by R. E. Greene)
Autorzy:
Schirmer, Helga
Powiązania:
https://bibliotekanauki.pl/articles/1214996.pdf
Data publikacji:
1992
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
transversally fixed maps
minimal and arbitrary fixed point sets
Nielsen fixed point theory
relative and extension Nielsen numbers
Opis:
Examples exist of smooth maps on the boundary of a smooth manifold M which allow continuous extensions over M without fixed points but no such smooth extensions. Such maps are studied here in more detail. They have a minimal fixed point set when all transversally fixed maps in their homotopy class are considered. Therefore we introduce a Nielsen fixed point theory for transversally fixed maps on smooth manifolds without or with boundary, and use it to calculate the minimum number of fixed points in cases where continuous map extensions behave differently from smooth ones. In the appendix it is shown that a subset of a smooth manifold can be realized as the fixed point set of a smooth map in a given homotopy class if and only if it can be realized as the fixed point set of a continuous one. A special case of this result is used in a proof of the paper.
Źródło:
Fundamenta Mathematicae; 1992, 141, 1; 31-59
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Miocene capybaras from Argentina: Skull anatomy, taxonomy, evolution, and biochronology
Autorzy:
Vucetich, M.G.
Deschamps, C.M.
Vieytes, E.C.
Montalvo, C.I.
Powiązania:
https://bibliotekanauki.pl/articles/945889.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
Miocene
Late Miocene
capybara
mammalia
Rodentia
Cavioidea
Hydrochoerinae
Argentina
skull
anatomy
taxonomy
evolution
biochronology
morphometry
biostratigraphy
Opis:
Fossil capybaras are morphologically extremely varied, but previous studies have disagreed on whether this diversity reflects intraspecific variation or the existence of multiple species. Here, we review the capybaras from the classic Argentinian Late Miocene localities of Paraná River cliffs (“conglomerado osífero” of the Ituzaingó Formation, Entre Ríos), and Chillhué and Guatraché shallow lakes (Cerro Azul Formation, La Pampa), and perform a morphometric analysis of their upper cheek teeth and the posterior portion of the rostrum. Our results confirm that all of the specimens from the “conglomerado osífero” belong to the single species Cardiatherium paranense. In addition, we refer a specimen from Tupungato (Río de los Pozos Formation, Mendoza) to C. paranense, thus expanding its geographical range. The material from La Pampa represents a different taxon, and is here preliminary referred to Cardiatherium aff. orientalis. Our systematic interpretation of Late Miocene capybaras suggests that the early radiation of this group was not as explosive as previously thought, and was likely constrained by the early acquisition of large size, increasing complexity of the cheek teeth, and probably semi-aquatic habits.
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 3; 517-535
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tribological behavior, mechanical properties and microstructure of Al-12Si-ZrC composite prepared by powder metallurgy
Autorzy:
John, C. F.
Paul, R. C.
Singh, S. C. E.
Ramkumar, T.
Powiązania:
https://bibliotekanauki.pl/articles/201910.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wear
friction
aluminium
silicon
zirconium carbides
powder metallurgy
tarcie
krzem
węgliki cyrkonu
metalurgia proszków
Opis:
High-energy mechanical alloying method was used to prepare Al-12Si-xZrC (x = 0, 5, 10, 15 wt. %) nanocomposites. Cylindrical preforms were prepared with an initial preform density of 89% by using a suitable die and punch assembly. The preforms were sintered in a muffle furnace with an inert gas atmosphere at a temperature of 550°C, followed by cooling until room temperature has been attained. Scanning electron microscope (SEM) and X-ray diffraction (XRD) techniques were used to characterize the composites. Pin-on-disc wear testing machine was used to determine the tribological properties of the prepared composites. The results show that the wear loss reduced with increasing the reinforcement content and coefficient of friction increases gradually.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 2; 149-154
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of nitrogen fertilization and plant density on seed yield and fat content and quality of pot marigold (Calendula officinalis L.) under climatic conditions of Belarus
Autorzy:
Kwiatkowski, C.A.
Harasim, E.
Yakimovich, A.
Powiązania:
https://bibliotekanauki.pl/articles/12693919.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
This paper presents the results of a study on the effect of different N fertilization and seeding rates on yield and some quality parameters (of seeds) of pot marigold. A field experiment was carried out during 2014–2016 under soil and climatic conditions of Belarus (Priluki Research Station near Minsk). The experiment included the following factors: N fertilization rate 40, 60, 80, 100 kg hm⁻¹; plant density per 1 m² (30, 50, 70, 90). The experiment was set up as a randomized block design in five replicates, with a single plot area of 8.0 m² . The soil in Priluki was characterized by medium nutrient availability (at the level: P = 120–127, K = 164–174, Mg = 59–66 mg kg⁻¹ soil). Regardless of the experimental factors, weather conditions had a significant impact on pot marigold productivity. The year 2016, characterized by an even distribution of rainfall during the growing season and moderate air temperatures, proved to be most beneficial for pot marigold productivity and quality. Hydrological conditions in the other years (2014 and 2015) there was a slight drought. The year 2014 should be considered to be cold, whereas the second year of the study (2015) was moderately warm. Best production effects (seed yield, fat yield) were obtained at rates of 60–80 kg N hm⁻¹. This rate of nitrogen fertilization also modified the fatty acid composition, contributing to a higher content of linoleic acid and calendic acid (∑ α-calendic and β-calendic acids). A nitrogen rate of 100 kg N hm⁻¹ proved to be irrational in terms of the quantity and quality of pot marigold yield. A density of 50–70 plants per 1 m² resulted in the highest seed and fat yield per unit area. A plant density of 50 plants per 1 m² resulted in the highest content of C18 unsaturated acids (stearic acid, oleic acid, linoleic acid) in the oil.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 5; 3-12
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature-induced changes in the topography and morphology of C–nPd films deposited on fused silica
Autorzy:
Diduszko, R.
Kowalska, E.
Kozłowski, M.
Czerwosz, E.
Kamińska, A.
Powiązania:
https://bibliotekanauki.pl/articles/174476.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
carbonaceous-palladium film
PVD
XRD
SEM
FTIR
Opis:
Changes in superficial and structural properties in carbonaceous–palladium (C–Pd) films prepared by PVD method, induced by annealing them in an inert atmosphere were studied. C–Pd films with different Pd content in a carbon matrix were investigated. SEM observation after heat treatment showed the agglomeration of palladium nanograins into bigger grains and significant changes in a topography and morphology of C–Pd films. XRD studies confirmed the formation of big (more than 100 nm in diameter) Pd nanograins as a result of the annealing process. FTIR studies showed that C–Pd films from PVD process contained fullerene C60 and palladium acetate (films precursors), which were decomposed during the annealing process.
Źródło:
Optica Applicata; 2013, 43, 1; 133-141
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interplays between Mesoscopic Josephson Junctions and the Harper Equation
Autorzy:
Papp, E.
Micu, C.
Bica, I.
Powiązania:
https://bibliotekanauki.pl/articles/1791195.pdf
Data publikacji:
2009-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.21.Cd
74.50.+r
74.78.Na
Opis:
Proofs are given that by resorting to the discretization of the superconducting phase variable leads to the conversion of the eigenvalue equation of a mesoscopic Josephson junction under a dc voltage into a generalized version of the Harper equation with anisotropy parameter. A full conversion proceeds, however, in terms of selected parameters. Classical limits and further generalizations are also shortly discussed.
Źródło:
Acta Physica Polonica A; 2009, 116, 4; 486-488
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evaluation of the content of biologically active compounds in the old and the new plum cultivars
Ocena zawartości związków biologicznie czynnych w dawnych i nowych odmianach śliw
Autorzy:
Hallmann, E.
Kazimierczak, R.
Średnicka-Tober, D.
Rembiałkowska, E.
Rozpara, E.
Powiązania:
https://bibliotekanauki.pl/articles/337405.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
plums
new cultivars
old cultivars
polyphenols
vitamin C
anthocyanins
flavonoids
śliwka
nowa odmiana
dawna odmiana
polifenole
witamina C
antocyjan
flawonoidy
Opis:
The fruits of the old cultivars are valuable because of the taste and their culinary usefulness. The old cultivars of plants increase biodiversity in organic farms. Plum fruits are characterized by high healthy potential because they are rich in numerous biologically active compounds (polyphenols, especially phenolic acids, flavonoids and anthocyans), as well as vitamin C. In the presented work the plums of the old cultivars contained more vitamin C, phenolic acids and flavonols in comparison with new varieties of fruits. In the modern literature research on the comparison of the pro-healthy value of the new and the old plum cultivars is lacking. The experiment was carried out in 2017 using four varieties of the old and the new plums: Cacańska Rana, Opal, Ruth Gerstheter, Węgierka Wczesna (a gro up of the old cultivars) and Fryga, Kalipso, Katinka, Silvia (a group of the new cultivars). The content of dry matter (by scale method), vitamin C as well as polyphenols (by HPLC method) were determined in fruits. The obtained results were subject to statistical elaboration using Duncan's post-hoc test (ɑ = 0.05). The obtained results indicate that plums of the old varieties contained slightly more vitamin C, total phenolic acids (including caffeic, ferulic, p-coumaric and chlorogenic acids) and flavonols compared to plums of the new cultivars. The Cacańska Rana cv. fruits were characterized by the highest content of identified and measured biologically active compounds in comparison with the fruits of the other tested plum cultivars.
Owoce dawnych odmian śliw są cenione ze względu na walory smakowe oraz ich przydatność kulinarną. Wzbogacają bioróżnorodność w gospodarstwach ekologicznych. Śliwki charakteryzują się wysokim potencjałem zdrowotnym, ponieważ są zasobne w liczne związki biologicznie czynne (polifenole, szczególnie kwasy fenolowe, flawonoidy i antocyjany), jak również witaminę C. W prezentowanej pracy owoce dawnych odmian śliw zawierały więcej witaminy C, kwasów fenolowych oraz flawonoli w porównaniu z owocami odmian nowych. W najnowszej literaturze brakuje badań dotyczących porównania wartości prozdrowotnej nowych i dawnych odmian owoców śliw. Doświadczenie przeprowadzono w roku 2017 z użyciem czterech odmian śliw dawnych i nowych: Cacańska Rana, Opal, Ruth Gerstheter, Węgierka Wczesna (grupa dawnych odmian) oraz Fryga, Kalipso, Katinka, Silvia (grupa nowych odmian). W owocach oznaczono zawartość suchej masy (metodą wagową), witaminy C, jak też polifenoli (metoda HPLC). Otrzymane wyniki poddano analizie statystycznej z zastosowaniem testu post-hoc Duncana (ɑ=0,05). Otrzymane wyniki wskazują, że śliwki dawnych odmian zawierały nieznacznie więcej witaminy C, kwasów fenolowych ogółem (w tym kawowego, ferulowego, p-kumarynowego i chlorogenowego) oraz flawonoli w porównaniu z śliwkami odmian nowych. Owoce odmiany Cacańska Rana charakteryzowały się najwyższą zawartością zidentyfikowanych i zmierzonych związków biologicznie czynnych w porównaniu z owocami pozostałych badanych odmian śliw.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2018, 63, 2; 86-91
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of heredity kernels and their influence on the life time of glass/polyester composites
Autorzy:
Olodo, E. T.
Adjovi, E. C.
Adanhounme, V.
Powiązania:
https://bibliotekanauki.pl/articles/955255.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
lepkosprężystość
parametry sprężyste
kompozyty
heredity kernels
viscoelastic parameters
lifetime
Opis:
One of the major problems encountered in prediction of hereditary viscoelastic behavior of polymeric composites is the determination of heredity kernels. This issue comes down to identification of the model characterizing the viscoelastic properties of these materials. The purpose of this work is to propose a model for prediction of viscoelastic nonlinear behavior of laminate composite with polyester matrix, through the study and analysis of heredity kernels and their influence on the life time of this material. Identification of this model required experimental determination at room temperature, of viscoelastic parameters of heredity kernels by macroscopic approach. These data provide predictive tools for establishment of the life time and long term stress limit under static complex loading for this type of material.
Źródło:
International Journal of Applied Mechanics and Engineering; 2014, 19, 4; 725-734
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Field validation of DNDC and SWAP models for temperature and water content of loamy and sandy loam Spodosols
Autorzy:
Balashov, E.
Buchkina, N.
Rizhiya, E.
Farkas, C.
Powiązania:
https://bibliotekanauki.pl/articles/972349.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
field validation
agroecosystem
modelling
soil water content
soil temperature
DNDC model
SWAP model
temperature
water content
loamy sand
sandy loam
Spodosol
Opis:
The objectives of the research were to: fulfil the preliminary assessment of the sensitivity of the soil, water, atmosphere, and plant and denitrification and decomposition models to variations of climate variables based on the existing soil database; validate the soil, water, atmosphere, and plant and denitrification and decomposition modelled outcomes against measured records for soil temperature and water content. The statistical analyses were conducted by the sensitivity analysis, Nash-Sutcliffe efficiency coefficients and root mean square error using measured and modelled variables during three growing seasons. Results of sensitivity analysis demonstrated that: soil temperatures predicted by the soil, water, atmosphere, and plant model showed a more reliable sensitivity to the variations of input air temperatures; soil water content predicted by the denitrification and decomposition model had a better reliability in the sensitivity to daily precipitation changes. The root mean square errors and Nash-Sutcliffe efficiency coefficients demonstrated that: the soil, water, atmosphere, and plant model had a better efficiency in predicting seasonal dynamics of soil temperatures than the denitrification and decomposition model; and among two studied models, the denitrification and decomposition model showed a better capability in predicting the seasonal dynamics of soil water content.
Źródło:
International Agrophysics; 2014, 28, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Hardening in Alloys and Composites and Its Examination with a Diffraction and Self-Consistent Model
Autorzy:
Gadalińska, E.
Baczmański, A.
Wroński, S.
Wróbel, M.
Scheffzük, C.
Powiązania:
https://bibliotekanauki.pl/articles/97949.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
metal-matrix composites
MMCs
hardening
micromechanics
neutron diffraction
Opis:
The paper presents the results of diffraction stress measurement in Al/SiC composite and in 2124T6 aluminum alloy during the in situ tensile test. The main aim of the work is to observe the stress values for different stages of tensile test for the composite after applying two types of thermal treatment and for the alloy used as a matrix in this composite, to identify the type of hardening process. The experimental results were compared against the calculations results obtained from the self-consistent model developed by Baczmański [1] - [3] to gain the information about the micromechanical properties (critical resolved shear stress τcr and hardening parameter H) of the examined materials. This comparison allowed researchers to determine the role of reinforcement in the composite as well as the impact of the heat treatment on the hardening of the material.
Źródło:
Fatigue of Aircraft Structures; 2018, 10; 31-46
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seasonal and diurnal variations of δ13C and concentration of atmospheric CO2 at Parma, Italy
Autorzy:
Longinelli, A.
Selmo, E.
Powiązania:
https://bibliotekanauki.pl/articles/2058957.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
atmosphere
carbon dioxide
environment
anthropogenic emissions
carbon isotopes
Opis:
The δ13C of atmospheric CO2 from discrete air samples collected at the University campus, Parma, Italy, was measured at time intervals of about five days over a period of 18 months. Some day and night samples were measured along with three daily time series to evaluate the daily variations of δ13C values and CO2 concentrations. The following patterns were revealed: (1) the least negative δ13C values show a seasonal evolution with slightly more negativevalues during winter and less negative values during summer. Home heating systems probably contribute to this behaviour; (2) four samples collected in down town Parma show more negative values than those collected at the same time at the University campus, probably be cause of car engine pollution; (3) occasionally, quite negative δ13C values were obtained at the campus. The expansion of polluted air masses from down town to the suburban area may be responsible for these negative events; (4) one sample showed a δ13C of -17.67‰. The nearby fields had been extensively manured and the contribution from organic matter fermentation may explain the exceptionally negative result; (5) the diurnal changes in δ13C are relatively low from January to May; (6) in July and September the major daily changes take place in the late evening and in the early morning and are very fast. During the night the CO2 concentration in creases by no more than some 50-60%, this behaviour differing from observations by other authors in different areas; (7) the set of daily samples collected in August shows a different behaviour, clearly related to the heavy rain that lasted for several hours during the night.
Źródło:
Geological Quarterly; 2005, 49, 2; 127-134
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie zawartości związków polifenolowych i witaminy C w dżemach z owoców wybranych odmian porzeczki czarnej Ribes Nigrum L. z uprawy ekologicznej i konwencjonalnej
A comparison of the polyphenol and vitamin C content in jams of several varieties of black currants Ribes Nigrum L. from the organic and conventional cultivation
Autorzy:
Kazimierczak, R.
Hallmann, E.
Brodzka, A.
Rembiałkowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/335670.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
związki polifenylowe
witamina C
czarna porzeczka
uprawa ekologiczna
uprawa konwencjonalna
polyphenol
vitamin C
black currant
organic cultivation
conventional cultivation
Opis:
W odpowiedzi na chemizację rolnictwa konwencjonalnego, jak również wzrost świadomości konsumentów o dobroczynnym wpływie żywności ekologicznej na zdrowie, w ostatnich latach obserwuje się wzrost zainteresowania tego rodzaju żywnością. Dużo uwagi poświęca się również związkom bioaktywnym takim jak roślinne antyoksydanty, wykazujące bardzo istotne znaczenie dla zdrowia człowieka, a zwłaszcza mogące zapobiec wielu schorzeniom wywołanym działaniem wolnych rodników. Owoce czarnej porzeczki są bardzo zasobne w te składniki, w tym głównie w witaminę C, antocyjany, flawonoidy i kwasy fenolowe. Istnieją badania naukowe, pozwalające przypuszczać, że metody rolnictwa ekologicznego wpływają na zwiększenie wartości odżywczej oraz zawartości antyoksydantów w płodach rolnych. Można się zatem spodziewać wyższego poziomu tych składników również w owocach czarnej porzeczki z upraw ekologicznych. Brakuje natomiast danych na temat zawartości antyoksydantów w przetworach porzeczkowych w zależności od sposobu uprawy owoców. W pracy przedstawiono wyniki zawartości związków polifenolowych i witaminy C w pasteryzowanych i nie pasteryzowanych dżemach wykonanych z owoców trzech odmian porzeczki czarnej: Ojebyn, Titania i Ben Lomond, pochodzących z ekologicznego i konwencjonalnego systemu produkcji. Wyniki wykazały, że zarówno pasteryzowane, jak i nie pasteryzowane dżemy z owoców z produkcji ekologicznej charakteryzowały się istotnie wyższą zawartością kwasów fenolowych, flawonoli i witaminy C w porównaniu do przetworów z owoców wyprodukowanych metodą konwencjonalną. Również zawartość antocyjanów w przetworach pasteryzowanych była wyższa, gdy owoce pochodziły z uprawy ekologicznej, natomiast w przetworach nie pasteryzowanych stwierdzono więcej antocyjanów, gdy wykonane były z owoców konwencjonalnych.
As a response to growing use of chemicals in conventional agriculture and to the increase of consumer consciousness that organic food has a beneficial impact on health, this kind of food have became popular in recent years. Recently, there has been devoted a lot of attention to bioactive constituents, like plant antioxidants, which are very important to prevent many diseases caused by free radicals. Black currant fruits contain a lot of these compounds, mostly vitamin C, anthocyanins and flavonols. It is supposed that organic farming is able to increase nutritional value and antioxidant composition of agricultural products, therefore it was supposed that organic Black Currant could have higher level of this components. However there is a lack of data on the content of antioxidants in the black currant preserves in respect to the cultivation method of fruits. The work presents the results of content of polyphenols and vitamin C content in non pasteurized and pasteurized jams of fruits of three black currant cultivars: Ojebyn, Titania and Ben Lomond from organic and conventional cultivation. Obtained results showed significantly higher level of phenolic acids, flavonols and vitamin C in organic jams of black currant fruits in comparison to conventional. The content of anthocyanins in the pasteurized preserves was also higher when they were made from organic fruits, whereas the situation in non pasteurized preserves was inverse.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2009, 54, 3; 123-129
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie aplikacji mobilnej w językach Swift i Objective-C
Comparison of mobile application using Swift and Objective-C
Autorzy:
Sienkiewicz, K. E.
Łukasik, E.
Powiązania:
https://bibliotekanauki.pl/articles/98320.pdf
Data publikacji:
2017
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
metody wytwarzania aplikacji
analiza implementacji widoków
silnik QUARTZ 2D
method of applications development
analysis of the implementation of views
QUARTZ 2D engine
Opis:
Tematyką artykułu jest porównanie metodyk wytwarzania aplikacji mobilnych w językach Swift i Objective-C. W ramach przeprowadzonej analizy zostaną wskazane podobieństwa i różnice w implementacji aplikacji na te dwa języki programowania. Zaprojektowana została i zaimplementowana aplikacja Magic Drawing Board wykorzystująca silnik QUARTZ 2D. Stworzono dwie identyczne funkcjonalnie aplikacje. Analiza porównawcza została przeprowadzona dopiero po dokładnym objaśnieniu implementowanych widoków.
The subject of the article is to compare the methodologies for the production of mobile applications in Swift and Objective-C languages. The similarities and differences of the implementation of applications for these two programming languages will be identified as a part of the analysis. An Magic Drawing Board application using Quartz 2D engine was designed and implemented. Two identical functional applications were created. The comparative analysis was carried out only after a thorough explanation of the implemented views.
Źródło:
Journal of Computer Sciences Institute; 2017, 3; 54-58
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment on Gamma Attenuation Behavior of W-VC-C and W-VC-TiC-C Composites for Co-60 Radioisotope
Autorzy:
Demir, E.
Tugrul, A.
Sonmez, S.
Ovecoglu, L.
Buyuk, B.
Yilmaz, O.
Powiązania:
https://bibliotekanauki.pl/articles/1031587.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
attenuation coefficient
Co-60
radiation shielding material
transmission technique
W-VC-C-TiC composite
Opis:
In this study, tungsten-vanadium carbide-graphite (W-VC-C) and tungsten-vanadium carbide-titanium carbide-graphite composite (W-VC-TiC-C) materials were investigated against Co-60 gamma radioisotope. The composite materials which are used in advanced technological studies and high temperature applications in many various fields especially in the areas of fission and fusion armor materials were produced by mechanical alloying method as in two groups. One of them include 93% tungsten (W), 6% vanadium carbide (VC) and 1% graphite (C) also which has three different alloying times (6-12-24 h). Other group of the samples was composed of 91% tungsten, 6% vanadium carbide (VC), 2% titanium carbide (TiC) and 1% graphite (C) also which has three different alloying times (6-12-24 h) and sintered at 1750°C. Co-60 gamma radioisotope source and gamma transmission technique were used in the experiments to investigate the properties of the composite materials. The mass attenuation coefficients of the samples were determined by using experimental results and theoretical mass attenuation coefficients were calculated from XCOM computer code. It can be concluded that increasing the tungsten ratio causes higher mass attenuation coefficient and the composite materials have provided us benefits better than lead for radiation gamma shielding.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 830-832
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Connecting the dots: understanding the relationship between religiosity, psychological resilience and depression in breast cancer patients
Autorzy:
Fradelos, E.C.
Powiązania:
https://bibliotekanauki.pl/articles/1918864.pdf
Data publikacji:
2019-08-26
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Religiosity
breast cancer
depression
psychological resilience
Opis:
Introduction: Death anxiety, fear of abundance, isolation, stigma of the disease and medication side effects are among the most common sources of anxiety and depression in patients with breast cancer. Purpose: To examine the possible relationship between religiosity, psychological resilience and depression on breast cancer patients. Materials and methods: A cross-sectional design was employed in this study which 152 breast cancer patients participated. Data were collected with the following instruments: Patient Health Questionnaire-2-item scale, Connor-Davidson Resilience Scale 25 and Centrality of Religiosity Scale and a special designed sheet reporting social, demographic and clinical characteristics. Statistical analyses were conducted with the Statistical Package for the Social Science V25. Descriptive statistics such means, and frequencies were calculated and inferential statistics such correlation test, simple and multiple regression analysis were applied. Results: Approximately 1 in 3 patients suffered symptoms of depression while they were reporting moderate religiosity and resilience values. Based on the four-step mediation analysis religiosity was strongly associated with psychological resilience but it was not found to affect directly either depression, but psychological resilience can be a mediator between religiosity and depression. Conclusion: This study supports the notion thatreligiosity and spirituality can have a beneficial influence on health outcomes.
Źródło:
Progress in Health Sciences; 2019, 1; 98-104
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coherent and Sequential Tunneling in High Magnetic Field
Autorzy:
Belyaev, A. E.
Vitusevich, S. A.
Maude, D.
Portal, J. C.
Powiązania:
https://bibliotekanauki.pl/articles/1968012.pdf
Data publikacji:
1997-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Gk
85.30.Mn
Opis:
In the resonant tunneling diode incorporating a wide one-sided spacer layer, an oscillation picture has been studied in both polarities of the applied voltage in high magnetic field. The results lead to the conclusion that the interference between the electron waves running in the forward direction and the ones reflected at some potential step can occur in both the emitter and collector regions. The characteristic lengths corresponding to the path of the ballistic motion of electrons were estimated. An exchange enhancement of the electronic g-factor in two-dimensional systems was observed.
Źródło:
Acta Physica Polonica A; 1997, 92, 4; 704-708
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Appropriated Islam: Hindu-Muslim cultural symbiosis and matriliny among the Mappilas of Kerala
Autorzy:
Farook, Musthafa
Haskerali, E.C
Powiązania:
https://bibliotekanauki.pl/articles/957819.pdf
Data publikacji:
2017
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
matriliny
mappila
tharavad
karanavan
mut’a
Opis:
Marumakkathayam or the  matrilineal form of inheritance is an important social institution that emerged in Kerala around the beginning of Ninth Century A.D. Some prominent sections in the Hindu community practised this system. Joint families under the  headship of the eldest female member was a peculiar feature of this system. The male members were visitors of the household and the inheritance of the property went to the children of the female members. Gradually, the women became the owners of  property. The system was also prevalent among the Mappilas of the land. Different reasons are attributed for the emergence of matriliny among them. But the conversion of the matrilineal Hindus to Islam is the real cause for adaptation of this institution in Muslim society.
Źródło:
Journal of Education Culture and Society; 2017, 8, 2; 268-274
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural and Optical Properties of Nanostructured Fe-Doped SnO₂
Autorzy:
Saleh, S.
Ibrahim, A.
Mohamed, S.
Powiązania:
https://bibliotekanauki.pl/articles/1398977.pdf
Data publikacji:
2016-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.07.-b
61.05.C-
78.20.-e
Opis:
Nanocrystalline $Sn_{1-x}Fe_xO_2$ (where x = 0, 0.01, 0.02, 0.03 and 0.04) powders have been successfully synthesized by the hydrothermal method followed by sintering at 1000°C for 3 h. The morphology and structure of the samples have been analyzed by field emission scanning electron microscope and X-ray diffraction, respectively. X-ray diffraction results revealed that all diffraction peaks positions agree well with the reflection of a tetragonal rutile structure of SnO₂ phase without extra peaks. The formation of a tetragonal rutile structure of SnO₂ nanostructures was further supported by the Raman spectra. The band gap of Fe-doped SnO₂ nanoparticles was estimated from the diffuse reflectance spectra using the Kubelka-Munk function and it was decreasing slightly with the increase of Fe ion concentration from 3.59 to 3.52 eV. The variation in band gap is attributed predominantly to the lattice strain and particle size. The presence of chemical bonding was confirmed by the Fourier transform infrared spectra.
Źródło:
Acta Physica Polonica A; 2016, 129, 6; 1220-1225
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rostral reconstruction of South American hippidiform equids: New anatomical and ecomorphological inferences
Autorzy:
Bernardes, C.
Sicuro, F.L.
Avilla, L.S.
Pinheiro, A.E.P.
Powiązania:
https://bibliotekanauki.pl/articles/22292.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
The Pleistocene Equus (Amerhippus) and hippidiforms frequently occur together in the South American fossil record, suggesting a possible case of sympatry and syntopy. Although resembling each other in their overall morphology, their rostra show distinct differences. While Equus (Amerhippus) resembles extant horses, hippidiforms are characterised by slender nasal bones, a retracted nasal notch at the level of M2–M3 or posterior to M3, and the presence of dorsal preorbital fossae of variable depth. Here we present an anatomical reconstruction of the muzzle of hippidiforms based on homologous patterns in the extant horse Equus caballus, together with a morphofunctional analysis of their rostra and a comparative analysis of premaxillary shape. The rostral morphology of hippidiforms suggests the presence of a developed upper lip with prehensile function, as occurs in extant black rhinoceros. This prehensile structure could be ecomorphologically related to browsing, thus reducing niche overlap with Equus(Amerhippus), and hence competitive pressure.
Źródło:
Acta Palaeontologica Polonica; 2013, 58, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-100 z 540

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