title: The production of alpha-amylase in batch and chemostat culture by Bacillus stearothermophilus.
abstract: The production of alpha-amylase (alpha-1,4-glucan 4-glucanohydrolase; EC 3.2.1.1) by a strain of Bacillus stearothermophilus isolated from leaf litter was investigated in a tryptone-maltose medium at 55 degrees C in batch and chemostat culture. Amylase production was growth-limited and restricted to the exponential phase in batch culture. The enzyme yield was reduced by 40% when the culture pH was maintained at pH 7.2. Amylase production in chemostat culture was influenced by the growth rate throughout the dilution rate range used.
mesh_terms: D000681:Amylases / Q000096:biosynthesis*; D003470:Culture Media; D001411:Geobacillus stearothermophilus / Q000201:enzymology* / Q000254:growth & development; D006863:Hydrogen-Ion Concentration; D012988:Soil Microbiology; D000516:alpha-Amylases / Q000096:biosynthesis*
chemical_list: D003470:Culture Media; D000681:Amylases; D000516:alpha-Amylases