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    Wyświetlanie 1-5 z 5
    Tytuł:
    Assessment of mercury in muscles, liver and gills of marine and freshwater fish
    Autorzy:
    Luczynska, J.
    Luczynski, M.J.
    Paszczyk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1189779.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    fish
    total mercury
    mercury
    muscle
    liver
    gill
    marine fish
    freshwater fish
    body weight
    total length
    biotic factor
    condition factor
    Opis:
    In this study, the total mercury concentration was determined in the muscles, liver and gills of six fish species (rainbow trout Oncorhynchus mykiss Walb., carp Cyprinus carpio L., bream Abramis brama L., perch Perca fluviatilis L., ide Leuciscus idus L. and flounder Platichthys flesus L.). The fish were acquired from October to November 2012. Mercury was analyzed by atomic absorption spectrometry using thermal decomposition, compounds of mercury and amalgamation. The mercury content in fish organs reached 0.006-0.168 (in mg kgˉ¹ wet weight) in muscles, 0.001-0.027 in gills and 0.003-0.045 in the liver. The muscles of perch and ide had significantly more Hg compared to the other fish’s muscles (P≤0.05). The liver and gills of perch, ide and flounder contained more Hg than the same tissues of the other fish (P≤0.05). Generally, the highest Hg content was determined in muscles (except rainbow trout) (P≤0.05), whereas the lowest Hg content was found in gills (except perch) (P≤0.05). The content of Hg in gills of perch did not differ from the one in the liver (P>0.05). There was a positive correlation between the weight or length of a fish and the Hg concentration in its tissues, except for the length and Hg in the gills of carp. However, a statistically significant positive correlation between the body weight and the Hg levels in fish appeared only in the case of the organs of ide (P≤0.004) and muscles of carp (P≤0.038). The correlation between the factor condition and the content of Hg, albeit positive (0.106 < r < 0.811) except for the organs of flounder, was not statistically significant (P>0.05).
    Źródło:
    Journal of Elementology; 2016, 21, 1; 113-129
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of mercury in muscles, liver and gills of marine and freshwater fish
    Autorzy:
    Luczynska, J.
    Luczynski, M.J.
    Paszczyk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/13699.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    fish
    total mercury
    mercury
    muscle
    liver
    gill
    marine fish
    freshwater fish
    body weight
    total length
    biotic factor
    condition factor
    Opis:
    In this study, the total mercury concentration was determined in the muscles, liver and gills of six fish species (rainbow trout Oncorhynchus mykiss Walb., carp Cyprinus carpio L., bream Abramis brama L., perch Perca fluviatilis L., ide Leuciscus idus L. and flounder Platichthys flesus L.). The fish were acquired from October to November 2012. Mercury was analyzed by atomic absorption spectrometry using thermal decomposition, compounds of mercury and amalgamation. The mercury content in fish organs reached 0.006-0.168 (in mg kgˉ¹ wet weight) in muscles, 0.001-0.027 in gills and 0.003-0.045 in the liver. The muscles of perch and ide had significantly more Hg compared to the other fish’s muscles (P≤0.05). The liver and gills of perch, ide and flounder contained more Hg than the same tissues of the other fish (P≤0.05). Generally, the highest Hg content was determined in muscles (except rainbow trout) (P≤0.05), whereas the lowest Hg content was found in gills (except perch) (P≤0.05). The content of Hg in gills of perch did not differ from the one in the liver (P>0.05). There was a positive correlation between the weight or length of a fish and the Hg concentration in its tissues, except for the length and Hg in the gills of carp. However, a statistically significant positive correlation between the body weight and the Hg levels in fish appeared only in the case of the organs of ide (P≤0.004) and muscles of carp (P≤0.038). The correlation between the factor condition and the content of Hg, albeit positive (0.106 < r < 0.811) except for the organs of flounder, was not statistically significant (P>0.05).
    Źródło:
    Journal of Elementology; 2016, 21, 1
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of Crack Detection Method with 2 Dimensionally Generated 3 Dimensionally Reconstructed Images in THT Solder Joints
    Autorzy:
    Gergely, G.
    Koncz-Horváth, D.
    Weltsch, Z.
    Gacsi, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/355906.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    serial sectioning
    reconstruction
    total crack length
    TCL
    through hole technology
    THT
    Opis:
    This work represents an interesting development in the detection and interpretation of crack evolution in through hole technology (THT) solder joints, which based on the development of general and common method. Serial sectioning is a useful method because it overcomes the problems associated with traditional two-dimensional metallographic techniques by providing information about (micro)structures in three-dimensions. In our work, serials sectioning with reconstruction method was utilized to visualize the 3D nature of cracks in through hole solder joint. Accurate quantitive analysis of the cracks, such as crack length, position and extension are presented with a help of the developed method: newly defined parameter and serial-cross sectioning method.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2B; 1033-1038
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of selection for more vigorous seminal roots in two cross populations of oat [Avena sativa L.]
    Autorzy:
    Gorny, A G
    Szolkowska, A
    Powiązania:
    https://bibliotekanauki.pl/articles/2047233.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    vegetative growth
    cross combination
    nitrogen limitation
    cross population
    Avena sativa
    root selection
    root total length
    drought
    selection effect
    seminal root
    phosphorus limitation
    oat
    water deficit
    Opis:
    Three steps of multi-stage selection for more vigorous seminal roots were done in two cross combinations of oat. The total length of roots (TRL) was measured in seedlings of the F₂, F₃ and F₄ generations grown in filter-paper rollers. On average, the finally selected F₅ (or F₆) progenies distinguished by 7-11% improved rooting ability than their midparents. Transgressive forms were selected only in one cross combination. Coefficients of realized heritability for TRL were low and ranged from 0.08 to 0.42 indicatinga relatively high proportion of non-additive gene effects in the variance of TRL. Tolerance of the F₆-progenies to water and nutrient limitations was evaluated in pot and field experiments. Correlated selection effects were dependent upon initial cross combination. Only progenies from one cross combination exhibited an improved drought tolerance at the 8-9 Feekes' stage. The both enhanced rooting and decreased S : R ratio of the F₆-progenies correlated with their improved tolerance to reduced P supply at the 4-leaf stage. However, no significant consistence occurred between indices of the tolerance to reduced nutrition at the vegetative growth and those at field maturity. Performed root selection identified more frequently high yielding genotypes with less stable grain yield. No progenies were obtained that outperform their parents under low-input conditions. It was emphasized that root selection should be accompanied by selection for integrated response components.
    Źródło:
    Journal of Applied Genetics; 1996, 37, 4; 331-344
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Demografia rodziny magnackiej w Wielkim Księstwie Litewskim na tle elit zachodnioeuropejskich. Wybrane problemy
    The Demography of the Magnate Family in the Grand Duchy of Lithuania against the Background of the West European Elites. Selected Problems
    Autorzy:
    Liedke, Marzena
    Powiązania:
    https://bibliotekanauki.pl/articles/1367709.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    magnate family
    age of the newly-weds
    marriage length
    total fertility rate
    Grand Duchy of Lithuania
    15th–18th centuries
    Opis:
    The article presents the results of the research on the age of newlyweds, the length of marriages, the number of children in the family and life expectancy for the magnate family in the Grand Duchy of Lithuania in the 16th–18th centuries, and the comparison of those numbers with the parameters established by West-European historical demographers for aristocratic elites from Britain, France, Germany and Portugal and the families that ruled in Europe. The demographic parameters for the magnate family have been obtained from the database that contains information on particular genealogical facts such as the date of birth, marriage and death, and the number of children (collected in library and archival queries for nine families) and they have been compared with the results arrived at by West-European researchers. The results for the magnate family indicate that the average age of men who contract marriage for the first time is included between over 23 to over 27 years; that is also the age range when European aristocrats contracted marriages, but the average age approached the upper limit more frequently. The age at which women from magnate families contracted marriage for the first time also correlates with the data concerning European female aristocrats, that is to say between 18 and 23–24, and approaches the upper limit of the interval. In the case of other parameters the magnate family were of lower value. The length of marriage in magnate families was shorter than in England, the number of children in a family also was smaller, and life expectancy was usually shorter both for men and women. When we compare the data concerning magnate families with the analogous parameters concerning the West-European elites we can see that the magnate families from Lithuania were generally less healthy. The increase of nearly all the demographic parameters in the 18th century in their case was after all inferior to the ones referring to similar social groups in England and France. There is a possibility that difficulties connected with obtaining complete data and – as a result – a less numerous research sample, as well as taking into consideration only the children that had grown to the adult age (in the West-European samples all the children that had been born were counted) have influenced the values of the parameters and made them less reliable. That is why it is a need to continue the research and to concentrate on other problems (which are important from the point of view of functioning of the family), such as the size of definite celibate in the group in question, the percentage of second and third marriages, the problem of illegitimate children, etc.
    Źródło:
    Przeszłość Demograficzna Polski; 2015, 37, 1; 37-70
    0079-7189
    2719-4345
    Pojawia się w:
    Przeszłość Demograficzna Polski
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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