[Influence of plant extracts on the metabolic activity of the yeast Saccharomyces cerevisiae 39]. / Vliianie nekotorykh rastitel'nykh ékstraktov na metabolicheskuiu aktivnost' drozhzhei Saccharomyces cerevisiae 39.

Addition to the nutrient medium of the extracts of camomile, nettle, mint, or Saint-John's-wort to a concentration of 0.5-4% was established to activate the yeast growth. The maximum effect was recorded on the addition of the extracts to the poor "water" medium. The extracts of camomile and Saint-John's-wort were shown to inhibit the alcohol dehydrogenase activity of the yeast cells, whereas the extracts of nettle and mint increased the activity of this enzyme by 62-70%.

[Effect of protein synthesis inhibitors on the activity of mitochondrial enzymes of Saccharomyces cerevisiae during desiccation]. / Vliianie ingibitorov belkovogo sinteza na aktivnost' mitokhondrial'nykh fermentov drozhzhei Saccharomyces cerevisiae pri obezvozhivanii.

The work deals with the effect of carbon sources, presence of protein synthesis inhibitors (cycloheximide and chloramphenicol) and dehydration regime on the enzyme activity of the dried yeast Saccharomyces cerevisiae. The yeast grown on molasses and dried by aeration demonstrated a notable increase of the NADH-dehydrogenase and succinate dehydrogenase activities as compared with the analogously treated yeast grown on ethanol. The latter showed a notable rise only in the activity of NADH-dehydrogenase during slow drying. Addition of protein synthesis inhibitors into the cultivation medium caused no decrease of activities of the above mentioned enzymes of the dried yeasts in any variant under study.