J. Denter et B. Bisping, FORMATION OF B-VITAMINS BY BACTERIA DURING THE SOAKING PROCESS OF SOYBEANS FOR TEMPE FERMENTATION, International journal of food microbiology, 22(1), 1994, pp. 23-31
The formation of B-vitamins (nicotinic acid and nicotinamide, thiamine
, vitamin B6 and vitamin B12) during the soaking of soybeans by bacter
ia, isolated from tempe, was investigated. Among the isolates examined
no vitamin B, producer was found. After inoculation of the soaking so
ybeans with Citrobacter freundii, Klebsiella pneumoniae, Pseudomonas f
luorescens and Streptococcus spp. the concentrations of vitamin B12 in
creased significantly. For the first time it was found that soakings i
noculated with C. freundii showed an increased vitamin B12 content. Ni
cotinic acid and nicotinamide were produced by Lactobacillus spp. and
C freundii. C freundii synthesized thiamine as well.