PRODUCTION OF CHEMICAL SUBSTANCES, OTHER THAN ETHANOL, BY FERMENTATION OR BIOSYNTHESIS (minor chemical modification of existing molecules, e.g. oxidation of steroids Fulltext... Hierarchy... Expanded...C07; separation of optically-active isomers from racemic mixtures Fulltext... Hierarchy... Expanded...C07B 19/02; vinegar Fulltext... Hierarchy... Expanded...C12J) |