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Production of Riboflavin and Vitamin B 12 by Bacillus megaterium ATCC 13639 and Enterobacter aerogenes in Corn Meal
Author(s) -
CHUNG H. J.,
FIELDS M. L.
Publication year - 1986
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1986.tb13848.x
Subject(s) - bacillus megaterium , riboflavin , enterobacter aerogenes , food science , fermentation , vitamin , methionine , meal , chemistry , b vitamins , biochemistry , biology , bacteria , amino acid , escherichia coli , genetics , gene , endocrinology
The % RNV values and available lysine of corn meal were decreased (P<0.05) by fermentation with B. megaterium ATCC 13639 and E. aerogenes but available methionine and tryptophan were significantly increased. Vitamin B 12 production by B. megaterium in corn meal was maximal after 5 days of fermentation at pH 6.0 and 30°C whereas the yield of riboflavin by E. aerogenes was the highest after 5 days of fermentation at pH 8.0 at 30°C. There were no differences (P>0.05) among the yields of riboflavin by B. megaterium in fermented corn meal at different pH and temperatures. Vitamin B 12 and riboflavin increased most rapidly during the first day of fermentation and continued to increase until the 5th day.