The object of the study was the snow cover in the 30 km zone of influence of the electrometallurgical plant LLC NLMK-Kaluga. As a result of the research, the polyelement composition of the solid fraction, dust load, influx of heavy metals (Fe, Cr, Zn Mn, Ni, Co, Pb, Cu, Cd), concentration factors and total indicators of contamination with heavy metals, as well as the cationic and anionic composition of thawed snow cover waters. It has been established that the intensity of snow cover pollution depends on the direction and distance from the source of pollution. The maximum effect of technogenic impact up to 8 times relative to background values was observed in the near 2 km zone. With increasing distance to 16 km, the dust load decreases and does not exceed 1.5 times. According to the research results, factors influencing the intensity of snow cover pollution have been established.
Кратко изложена общая информация о биологически активных веществах флавоноидах. Обоснована потребность в количественном определении их содержания в продуктах и влияния на него методов их обработки. Были изучены методики качественного и количественного определения флавоноидов в различных продуктах, препаратах и сырье. На их основании составлена и апробирована методика определения флавоноидов в образцах облученного кориандра. Рассмотрены дальнейшие пути изучения и доработки данной методики для определения содержания флавоноидов в облученных образцах методом спектрофотометрического анализа.
The effect of cocoa powder exposure to irradiation by various types of ionizing radiation on the amount of mesophilic aerobic and facultative anaerobic microorganisms, yeast and molds was studied. Doses of 12 kGy is found to be enough for reducing amount of mesophilic aerobic and facultative anaerobic microorganisms, yeast and molds below normative documents’ limits. The activity of flavonoids in irradiated and control samples of cocoa powder was also evaluated via spectrophotometric analysis. A conclusion about the possibility of implementing ionizing radiation for reducing amount of mesophilic aerobic and facultative anaerobic microorganisms, yeast and molds in cocoa powder without the loss of quality was made.
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