Microbiological and technological investigations concerning the obtaining ergosterol from yeasts

This paper reports on the experimental results for selection of Saccharomyces carlsbergensis CNMN-Y-15 yeast strain with high potential for ergosterol biosynthesis; determination of morpho-cultural and physiologo-biochemical characteristics of this yeast strain; establishment of the effect of low-intensity millimeter waves on ergosterol biosynthesis. Research results contributed to the elaboration of technological flow for obtaining of high yield of ergosterol from yeasts. The significant increasing of ergosterol content is possible due to the utililization of optimized nutritive medium with manganese acetate (0.012 gL-1) and glucose (40 gL-1); the treatment of inoculum with lowintensity millimeter waves for 20-30 minutes.