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The aim of this study was to determine whether oral supplementation of melatonin (M), a known antioxidant, free radical scavenger and metal chelator, influences lead (Pb), calcium (Ca) and magnesium (Mg) distribution in the blood, bones and teeth of rats exposed chronically to lead. The studies were carried out on male Wistar rats which, from their birth until reaching sexual maturity (for 3 months),...
An attempt was made to produce interspecific hybrids among Trifolium species. In situ pollination followed by in ovulo embryo culture and culture of the excised embryos, and in vitro pollination have been applied. 21 embryos were obtained from 636 in situ pollinations. 13 embryos were green and showed normal development. It was found that these embryos were produced in the result of self-fertilization...
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