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Miedź - znaczący mikroelement dla zwierząt

100%
Skibniewska E. M., Skibniewski M., Jesion I., Kosla T.
Przegląd Hodowlany
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2014
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tom 82
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nr 3
Copper is an essential trace element which determines the normal functioning of animal organisms. Copper plays a role in cellular metabolism, e.g. as an activator of numerous enzymes, hormones and vitamins. It is essential for the growth and development process in animals. An appropriate level of copper in the animal diet is important, as both deficiencies and excess levels of copper lead to undesirable effects. The mean copper concentration in the liver of ruminants from the Mazovia region was found to be 20.02 mgkg-1wet weight in the liver and 3.97 in the kidney, while in carnivores it was 20.91 mgkg-1wet weight in the liver and 2.76 mg kg-1 wet weight in the kidney. The lowest mean concentration of copper was noted in the muscles, with values of 1.43 and 0.84 mgkg-1wet weight for ruminants and carnivores, respectively.
2
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The effect of different ripening stages of durian Durio zibethinus fruit on zinc content in liver of rats loaded with cholesterol

76%
Jesion I., Leontowicz M., Leontowicz H., Gralak M. A., Kmiec H., Gorinstein S., Haruenkit R.
Annals of Warsaw University of Life Sciences - SGGW. Animal Science
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2014
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tom 53
The effect of different ripening stages of durian Durio zibethinus fruit on zinc content in liver of rats loaded with cholesterol. Durian Durio zibethinus is an exotic, climacteric fruit, rich in dietary fiber, polyphenols, saccharides, vitamins and minerals. Postharvest changes in durian fruit influence its physical and chemical quality, which determined its health protective effect – antioxidant and hypocholesterolemic. Durian is a good source of zinc. The aim of this study was to investigate the zinc content in lyophilisate of durian fruit and in the diets supplemented with durian fruits at different stages of maturity. The in vivo experiment was designed to determine the influence of these diets on zinc content in the liver of rats loaded with cholesterol. The zinc content in durian fruit, in the diets, and in rats livers was examined using a flame atomic absorption spectrophotometry (Perkin-Elemer 1100B). The zinc content in durian fruits ranged from 8.1 to 12.3 mg/kg. The zinc content amounted 45.0, 44.2, 47.1, 47.3 and 48.0 mg/kg in C, ch, chDM, ch DR and chDOR diet, respectively. The content of zinc in the liver in all animal groups was within the normal limits and amounted from 25.0 to 33.0 mg/kg fresh weight. Diet supplemented with durian fruits at different stages of ripening increases accumulation of zinc in the liver of rats loaded with cholesterol. Durian fruits, especially ripe ones, could be used as a natural supplementation of zinc in the diet and might be helpful in prevention of diseases or disorders related to zinc deficiency.
3
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Diets supplemented with Mytilus galloprovincialis from polluted and non-polluted waters and their influence on zinc content in liver of rats loaded with cholesterol

76%
Jesion I., Leontowicz M., Leontowicz H., Kolnierzak M., Gralak M. A., Park Y.-S., Gorinstein S.
Annals of Warsaw University of Life Sciences - SGGW. Animal Science
|
2014
|
tom 53
Diets supplemented with Mytilus galloprovincialis from polluted and non-polluted waters and their influence on zinc content in liver of rats loaded with cholesterol. Mussels may reflect the environmental problems that the ecosystem faces. Mytilus galloprovincialis is widely used as an indicator of water pollution in biological monitoring studies. These mussels are filter feeders and may accumulate important ecosystem pollutants what in turn may pose a potential risk to other organisms in the food chain. The aim of the study was to determine zinc content in the diets supplemented with mussels from polluted and non-polluted areas and in the livers of rats fed these diets for 30 days. The zinc content in the diets with mussels from contaminated and noncontaminated waters and in rat livers was examined using a flame atomic absorption spectrophotometry (Perkin-Elmer 1100B). The slight increase in zinc content from 73.2 ±1.2 mg/ /kg in ch diet (control with 1% of cholesterol) to 77.2 ±0.5 mg/kg in the diet with mussels from polluted site was found, but zinc content in all diet was within the normal limits reviewed by McDowell (1992) – 40 to 100 ppm. Zinc content in the diet supplemented with mussels from nonpolluted site (73.7 ±3.7 mg/kg) was similar to that found in ch diet. It can be concluded that cholesterol does not affect zinc bioaccumulation. However, prolonged consumption of mussels from contaminated sites may increase accumulation of zinc in the liver of rats.
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