단세포단백질의 국내생산을 목적으로 전국 각지의 토양을 비롯한 기타 시료 357 종에서 900 여주의 탄화수소 자화균주를 분리하였고, 그중에서 비교적 수율이 좋은 효모 7주에 대한 균학적 성질을 조사한 결과 Candida tropicalis(5주), Candida lypolitica (1주), Torulopsis sp (1주)로 동정되었다. 선정된 효모균주의 mass doubling time은 $2.9{sim}4.5$ hr., 수율은 $6.5{sim}16.3g/l$, 경유 및 등유의 균체로의 전환율은 $7.8{sim}19.3%$이고 ,건조효모의 조단백질함량은 $48.8{sim}59.8%$이었다.
Although there are no oil wells in Korea, yet more than 900 strains of petroleum hydrocarbon utilizing microorganisms have been isolated from 357 soil and sewage samples collected from oil depots and other sources there. From these samples 7 strains of yeast were selected on the basis of their superior cell yields. Five of them were identified as Candida tropicalis, the other being Candida lipolitica and Torulopis sp. Of the selected strains the mass doubling time is $2.9{sim}4.5$ hrs., the yield is $6.5{sim}16.3;g/l$; the conversion rate of crude petroleum substrate into the microbial mass is $7.8{sim}19.3%$; and protein content of dried cells is $48.8{sim}59.8%$.
