Reference

Immobilized cells of Rhizopus nigricans and their application in steroid transformation

Immobilized cells of Rhizopus nigricans and their application in steroid transformation. Yu, Dingkun; Zhou, Pei; Niu, Junjian; Liu, Shuhuang; Chu, Zhiyi (Fac. Pharm., Shanghai 1st Med. Coll., Shanghai, Peop. Rep. China). Shanghai Diyi Yixueyuan Xuebao, 11(4), 267-73 (Chinese) 1984. CODEN: SIIPD4. ISSN: 0253-3650. DOCUMENT TYPE: Journal CA Section: 16 (Fermentation and Bioindustrial Chemistry) R. nigricans Cells were immobilized on several solid supports. Only cells immobilized on Ca alginate [9005-35-0] could convert 16,17-epoxyprogesterone (I) [1097-51-4] to 11a-hydroxy-16,17-epoxyprogesterone (II) [19427-36-2]. The enzyme activity in the immobilized cells was 65% of that in free cells, and use of the immobilized cells could be repeated >10 times.

Application of microorganisms for 11a-hydroxylation of steroids on a scale-up experiment

Application of microorganisms for 11a-hydroxylation of steroids on a scale-up experiment. Huang, Tenghua; Li, Chunjuan; Shi, Maizhen; Qie, Shuhui; Peng, Guizhang; Chen, Bolun; Liu, Weida; Liu, Minhua (Shanghai Munic. Res. Inst. Ind. Microbiol., Shanghai, Peop. Rep. China). Yiyao Gongye, (7), 1-5 (Chinese) 1984. CODEN: YIGODN. DOCUMENT TYPE: Journal CA Section: 16 (Fermentation and Bioindustrial Chemistry) 11a-Hydroxy-16a,17a-oxido-4-pregnene-3,20-dione (I) [19427-36-2] was produced from 16a,17a-oxido-4-pregnene-3,20-dione (II) [1097-51-4] by Rhizopus 80322 in 500-L and 3000-L fermentors. The fermn. was carried out at 37°. The yield of I in 24 h was 31%, and the amt. of II recovered for recycling was 30%. The fermns. went faster than when done on a lab. scale.