Publications by authors named "N N Koval'chuk"

Different indices of cumulative risk assessment of combination of residues of pesticides which may simultaneously be present in raw agricultural crops, based on toxic evaluation of such combination have been presented. Risk for population health due to consumption of raw agricultural crops with triazole residues is acceptable on hazard index, point of departure index and cumulative risk index, exceeds allowable level on criterion "total margin of exposure".

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PHA quantity and activity dynamics during early germination of bean seed were investigated. Electrophoretic characteristics, subunits composition and carbohydrate-binding specificity of lectin extracted from white kidney bean cv. Bilozerna were studied.

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A system for evaluation of the ability of human blood serum to affect endothelial cell proliferation was developed and tested. The system based on incorporation of (3)H-thymidine into DNA was used to analyze the effects of hormone replacement therapy on endothelial repair and angiogenesis. Blood serum from 12 menopausal women less effectively activated endothelial proliferation compared to control donor serum.

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The results of the comparative study of the phenotypical properties and the plasmid profile of 63 strains of salmonellae, belonging to 44 serotypes of groups B, C1, C2, C3, D, E1, E4, F. The study revealed that strains of different serotypes had their individual plasmid profile. Strains of the same serotype of salmonellae isolated from similar sources had an identical plasmid profile, while strains isolated from different sources differed in their plasmid profiles, though they might have a similar phenotype.

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