<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Transformation of rifamycin B with soluble rifamycin oxidase from Curvularia lunata"^^ . "Transformation of rifamycin B to rifamycin S using soluble rifamycin oxidase from Curvularia lunata was carried out in shake flask and in a reactor. Optimum transformation temperature was found to be at 50°C but, from the practical point of view, all the transformation reactions were carried out at 28°C. In non-stirring condition it took 50 h to transform the 1% (w/v) solution of rifamycin B, while in stirring condition (200 rpm) it took only 3 h. Five percent enzyme solution (activity 11 IU ml−1) was found to be optimum for the transformation reaction. An aeration rate of 1–1.5 vvm was maintained during transformation reaction in a batch reactor. With higher substrate concentration (3%, w/v) it took more time (7 h) to complete the transformation than with 1% (w/v) rifamycin B (3 h).\r\n\r\nA few drops of antifoam (polypropylene glycol) was effective in suppressing the foam formed during aeration in the reactor and it did not interfere in the isolation of rifamycin S.\r\n"^^ . "1993" . . "29" . "1-2" . . "Elsevier Science"^^ . . . "Journal of Biotechnology"^^ . . . "01681656" . . . . . . . "U C"^^ . "Banerjee"^^ . "U C Banerjee"^^ . . . . . "HTML Summary of #664 \n\nTransformation of rifamycin B with soluble rifamycin oxidase from Curvularia lunata\n\n" . "text/html" . . . "QR Microbiology"@en . .