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Wyszukujesz frazę "Marciniak, B." wg kryterium: Autor


Wyświetlanie 1-5 z 5
Tytuł:
Wild boars (Sus scrofa) as bioindicators of environmental levels of selenium in Poland
Autorzy:
Nowakowska, E.
Pilarczyk, B.
Pilarczyk, R.
Tomza-Marciniak, A.
Bakowska, M.
Marciniak, A.
Powiązania:
https://bibliotekanauki.pl/articles/32147.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The objective of the study was to determine selenium content in selected organs (liver, kidney) of wild boars from different regions of Poland. Materials for the study were obtained from 28 sites located in 16 provinces of Poland. Selenium concentrations in organs were determined using spectrofluorometric methods after wet mineralization in HNO3 and HClO4 mixture. Mean selenium concentrations in the investigated wild boars from Poland were 0.230 μg/g wet weight in the liver and 1.327 μg/g w.w. in the kidneys. Hepatic and nephric Se concentrations ranged from 0.036-0.626 μg/g w.w. and 0.322-4.286 μg/g w.w., respectively. Selenium concentrations in the wild boars differed considerably according to geographical location. Concentrations of selenium were highest in wild boars from south-eastern provinces and lowest in animals from northern provinces. Most of Poland’s area is environmentally deficient in this trace element, as evidenced by marginal selenium levels in the organs of the wild boars.
Źródło:
Polish Journal of Veterinary Sciences; 2016, 19, 4
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accuracy of the photogrametric measuring system for large size elements
Autorzy:
Grzelka, M.
Budzik, G.
Marciniak, L.
Gapiński, B.
Powiązania:
https://bibliotekanauki.pl/articles/379891.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
photogrammetry
coordinate measuring technique
maximum permissible error
size measurement
optical coordinate measuring system
fotogrametria
współrzędnościowa technika pomiarowa
błąd maksymalny dopuszczalny
pomiar wielkości
optyczna współrzędnościowa technika pomiarowa
Opis:
The aim of this paper is to present methods of estimating and guidelines for verifying the accuracy of optical photogrammetric measuring systems, using for measurement of large size elements. Measuring systems applied to measure workpieces of a large size which often reach more than 10000mm require use of appropriate standards. Those standards provided by the manufacturer of photogrammetric systems are certified and are inspected annually. To make sure that these systems work properly there was developed a special standard VDI / VDE 2634, "Optical 3D measuring systems. Imaging systems with point - by - point probing. " According to recommendations described in this standard research on accuracy of photogrametric measuring system was conducted using K class gauge blocks dedicated to calibrate and test accuracy of classic CMMs. The paper presents results of research of estimation the actual error of indication for size measurement MPEE for photogrammetric coordinate measuring system TRITOP.
Źródło:
Archives of Foundry Engineering; 2011, 11, 2 spec.; 75-80
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of selenium status and its distribution in organs of free living foxes (Vulpes vulpes) from an Se deficient area
Autorzy:
Pilarczyk, B.
Pilarczyk, R.
Tomza-Marciniak, A.
Hendzel, D.
Bakowska, M.
Stankiewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/31746.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The objective of the study was to determine selenium status and its distribution in the organs of free living foxes from selenium deficient areas of north-western Poland. Samples of organs harvested from 40 foxes shot during the 2008-2009 hunting seasons served as experimental material. Selenium concentration in the organs was determined spectrofluorometrically. Selenium distribution in tissues depends largely on its dietary content. Our study indicated that concentrations of selenium in the examined organs followed the order: kidney>liver>spleen>lung>heart and kidneys were the organ with the highest retention of this element. Mean selenium concentration in fox kidneys was 0.60 ± 0.15 μg/g wet weight. Several times less selenium on average was found in the liver (0.27 ± 0.09 μg/g w.w.), lungs (0.17 ± 0.06 μg/g w.w.), spleen (0.19 ± 0.06 μg/g w.w.) and heart (0.13 ± 0.05 μg/g w.w.). All the animals studied were deficient in selenium.
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:
Serum selenium concentration and glutathione peroxidase activity and selenium content in testes of Polish Konik horses from selenium-deficient area in North-Western Poland
Autorzy:
Pilarczyk, B.
Tomza-Marciniak, A.
Stankiewicz, T.
Blaszczyk, B.
Gaczarzewicz, D.
Smugala, M.
Udala, J.
Tylkowska, A.
Kuba, J.
Ciesla, A.
Powiązania:
https://bibliotekanauki.pl/articles/31875.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The aim of this study was to determine serum selenium concentrations in Polish Konik horses residing in the Odra Delta Nature Park (Poland) and to evaluate the activity of glutathione peroxidase and Se content in testes of this horse breed. In over 95% of cases, serum Se concentration was below the optimal range, and none of the horses examined was deficient in this trace element. The lack of Se deficiency in the animals examined suggests however, that the Polish Konik horses have a natural ability to the optimal use of nutrients available in their life area. Testicular content of Se and GSHPx activity in the colts was higher than those found in stallions, and a positive relationship between these antioxidants was demonstrated. The differences in Se contents and GSHPx activities in testes between colts and stallions suggest that selenoenzymes play important roles during the puberty of male horses.
Źródło:
Polish Journal of Veterinary Sciences; 2014, 17, 1
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Red photonic glasses and confined structures
Autorzy:
Gonçalves, R. R.
Lukowiak, A.
Ristic, D.
Boulard, B.
Chiappini, A.
Chiasera, A.
Dorosz, D.
Marciniak, M.
Righini, G. C.
Ferrari, M.
Powiązania:
https://bibliotekanauki.pl/articles/953055.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
glass photonics
rare earth ions
waveguides
integrated optics
glass-ceramic
microspheres
whispering gallery modes
SiO2-HfO2
SiO2-SnO2
fotonika szkła
jony pierwiastków ziem rzadkich
falowody
optyka zintegrowana
ceramika szklana
mikrokulki
SiO2- HfO2
Opis:
We present some recent results obtained by our team in rare earth doped photonic glasses and confined structures, in order to give some highlights regarding the state of art in glass photonics. To evidence the unique properties of transparent glass ceramics we compare spectroscopic and structural properties between the parent glass and the glass ceramics. Starting from planar waveguides we move to spherical microresonators, a very interesting class of photonic confined structures. We also conclude the short review with some remarks about the perspective for glass photonics.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 4; 647-653
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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