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  • Title: Synthesis of alpha-amylase by Aspergillus oryzae in solid-state fermentation.
    Author: Francis F, Sabu A, Nampoothiri KM, Szakacs G, Pandey A.
    Journal: J Basic Microbiol; 2002; 42(5):320-6. PubMed ID: 12362403.
    Abstract:
    Spent Brewing Grains (SBG) was evaluated for its efficacy to be used as sole carbon source for the synthesis of alpha-amylase in solid-state fermentation using a fungal strain of Aspergillus oryzae NRRL 6270. Enzyme production was superior when the culture grew on mesophilic temperatures and best yields were at 25 degrees C. At 30 degrees C, yields were almost comparable. Maximum production of alpha-amylase [6870 U/g dry substrate (gds)] was obtained when SSF was carried out at 30 degrees C for 96 h using SBG medium, which had initial moisture of 70% and was inoculated using a spore suspension containing 1 x 10(7) spores/ml. Supplementation of SBG with external carbon sources such as mono-, di and polysaccharides caused repression in enzyme synthesis by the fungal culture.
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