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Studies on the formation of alpha-amylase by Thermomonospora vulgaris
Abstract:
Conditions affecting the formation of alpha-amylase by static cultures of the thermophilic actinomycete Thermomonospora vulgaris were studied. The organism failed to grow under submerged culture conditions or when the culture medium was devoid of CaCO3-alpha-Amylase was produced during the logarithmic phase of growth and maximum yield was obtained after 3 to 9 days of incubation. Growth and amylase formation took place only in a range from 45 degrees to 55 degrees C; optimum temperature was 55 degrees C. Of the tested carbon sources only starch induced enzyme formation. Maximum enzyme yield was obtained when starch concentration of the medium was 2% and when ammonium citrate served as a nitrogen source. Crushed clay pots could substitute for CaCO3 of the medium, but growth and amylase yield were less.
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