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Wyświetlanie 1-3 z 3
Tytuł:
Dietary chromium(III) propionate complex supplementation affects tissue mineral levels in rats fed high-fructose diet
Wpływ suplementacji diety propionianem chromu(III) na poziomy tkankowe pierwiastków u szczurów karmionych dietą wysokofruktozową
Autorzy:
Krol, E.
Krejpcio, Z.
Powiązania:
https://bibliotekanauki.pl/articles/13621.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Chromium(III) plays an important role in carbohydrate and lipid metabolism, thus supplements containing this element are broadly advertised as efficient agents improving blood glucose levels or even reducing body mass. However, their hypoglycemic potential depends on the chemical form, bioavailability, dosage and the duration of treatment. Chromium(III) supplementation is generally considered safe although some data point to interaction of this ion with other elements. Thus, the aim of this study was to evaluate the effect of chromium(III) supplementation on tissue mineral content in rats fed highfructose diets. Nine-week old male Wistar rats were fed ad libitum with a standard diet (control) or a high-fructose diet to induce insulin resistance. Next, supplementary dosages of chromium(III) propionate complex (1.0 and 5.0 mg Cr kg–1 b.w. day–1) were introduced and rats were fed those diets for 4 weeks. It has been found that supplementary chromium(III) did not affect tissue calcium, iron and zinc levels, but significantly increased hepatic magnesium and copper level, while decreasing splenic copper level in rats fed high-fructose diets. Higher chromium(III) dosages increased content of this element in kidneys. In conclusion, short-term supplementation of chromium(III) propionate complex affects mineral homeostasis in the tissues of rats fed high-fructose diets; however, the mechanisms of such interactions are only partially known.
Źródło:
Journal of Elementology; 2013, 18, 1
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Content of selected essential and potentially toxic trace elements in milk of cows maintained in eastern Poland
Zawartość istotnych i potencjalnie toksycznych wybranych pierwiastków śladowych w mleku krów utrzymywanych na terenie wschodniej Polski
Autorzy:
Krol, J.
Litwinczuk, Z.
Brodziak, A.
Kedzierska-Matysek, M.
Powiązania:
https://bibliotekanauki.pl/articles/15472.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Concentration of toxic metals in milk, especially in industrial regions, may serve as a direct bioindicator of the quality of milk and its products. But it can also function as an indirect indicator of contamination of the environment where milk is produced. The aim of the present study was to evaluate the content of some trace elements, i.e. Fe, Cu, Zn and Mn, as well as toxic elements (Cd and Pb) in milk from cows maintained on farms in three regions of Poland, including the production season as another aspect of the investigations. In total, 446 milk samples were analyzed. Significant influence of the season and production region on all the analyzed elements except Fe was noticed. Milk collected in the Biebrza and Bieszczady regions proved to be a richer source of Cu and Mn. Regardless of the production region, a higher content of Zn and Cu were observed in the summer, while more Mn was found in the winter milk. In none of the analyzed milk samples, Pb or Cd exceeded the permissible threshold.
Źródło:
Journal of Elementology; 2012, 17, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of different forms of food deprivation on calcium and magnesium concentrations in the serum, brain and femoral bone of female Wistar rats
Autorzy:
Wójciak, R. W.
Staniek, H.
Mojs, E.
Król, E.
Marcinek, K.
Krejpcio, Z.
Powiązania:
https://bibliotekanauki.pl/articles/963954.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Hypocalcaemia and hypomagnesaemia in patients with eating disorders are poorly identified, same as in animal models of these diseases. The purpose of the present study was to assess the concentration of calcium and magnesium in the serum, brain tissue and femoral bone of food restricted female Wistar rats. Material and Methods: 48 rats (8-weeks old, 199 ± 18 g) were divided into 6 groups (n = 8): the control group (C) were fed ad libitum, with measurements of daily intake, as a baseline for the amount of intake calculation for the other groups. The remaining five were testing groups: R50 – received half a portion of the diet eaten by C. The other groups were fed with a 100% of the diet eaten by C, but in a different model of food restriction: RI-IV – one-four day/s feeding, followed by one-four day/s starvation, throughout the eight weeks of the experiment. After wet mineralization of tissues, the calcium and magnesium concentrations were measured via the AAS method. Results: The calcium concentrations in serum and brain were unchanged, while the concentration of calcium in bone samples was significantly higher in food deprived rats compared to control groups rats. The influence of different models of food deprivation was observed in magnesium concentrations in the tissues studied. Generally, the levels of this mineral were significantly lower in all tissues in rats exposed to starvation than in control. Conclusions: The results of the current study suggest that although the amount of food intake was similar in all starvation models, food deprivation affects the management of calcium and magnesium in different ways. The competitiveness between these minerals, under food restriction, probably works to the benefit of calcium. This may lead to increased hypomagnesaemia and its subsequent implications.
Źródło:
Journal of Elementology; 2017, 22, 3
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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