abe fermentation ammonia amylase antibiotic barbital biomass biotin biotransformation bread buffer catalase cellulase cellulose cheese chemostat citric acid dosa edta enzyme ethanol fat fed-batch fermentation food microbiology glucose glutamic acid glycerol growth factor idli inducer industrial microbiology inhibitor insulin interferon lactase lactobacillus lactose lipase lysine metabolite microorganism molasses nitrate pectinase petroleum polyphosphate polysaccharide precursor protease protein rifamycin single cell protein soybean starch steroid streptokinase sucrose sugar beet sugarcane trace element vitamin whey wine