An opportunity of the abiogenic formation of oligonucleotides over the surface of montmorillonite particles, preliminarily irradiated with UV light, was found upon the adsorption of mononucleotides on this surface. A probable mechanism of such a synthesis is suggested.
Adsorption of nucleoside phosphates on the surfaces of volcanic rocks has been studied. Differences in the absorption of some nucleoside phosphates on the surface of basalt cinder have been found. Differences in the adsorption of similar molecules on different mineral surfaces have also been shown. Different adsorptive capacities may have served as a mechanism for the selection of organic molecules during prebiotic evolution.
Abstract, The complication and further evolution of abiotic syntheses products occurred under environmental influences at the prebiological stage. From this point of view, the influence of some types of irradiation on the organic molecules adsorbed on the surfaces of volcanic rocks, appeared to be of great importance. In this connection, the effect of gamma rays on the AMP molecules adsorbed on mineral surfaces such as cinders and ashes has been studied. It has been shown that they can polymerize with the formation of oligonucleotides. The treatment of oligomers obtained by venom phosphodiesterase has shown that a polymeric product has mainly 3'-5' and 2'-5' bonds between nucleotides. The results obtained have been discussed from the evolutionary aspect.
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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