[Cultivation of the yeast Trichosporon cutaneum K-1 on milk serum].

Yeast Trichosporon cutaneoum K-1 were cultivated on milk serum supplemented with nitrogen and phosphorus sources. The culture showed a high biosynthetic capacity. The specific growth rate (mu) of yeast on milk serum was 0.40-0.45 hr-1. During lactose assimilation in the synthetic medium mu was 0.43 hr-1 and the economic coefficent of the biomass yield was 54%. It was shown that assimilation first involved lactose and then organic acids. The composition of the resulting biomass was identified.