Abstract：
:During a tempe fermentation the concentrations of linoleic, and alpha-linolenic acids (ALA) decreased while the concentration of oleic acid increased. During fatty acid synthesis Rhizopus sp. produced only gamma-linolenic acid (GLA) instead of ALA. The amount of GLA in tempe were influenced by varying external parameters. The proteolytic capacity of 36 strains of the genus Rhizopus isolated from Indonesian tempe or tempe inocula was examined. There was a distinct increase in the amount of free amino acids during tempe fermentation. Fermentations with mixed populations of bacteria and Rhizopus yielded a lower level of free amino acids, but an increase in total amount of amino acids. In comparison to intracellular, and extracellular proteases the proteases of the cell wall fraction are most responsible for proteolytic capacity of the different Rhizopus strains. Two isolated strains of Citrobacter freundii were found to be the best vitamin B(12) producers during the soaking of soybeans. In the solid substrate fermentation the Rhizopus molds formed vitamin B(6), riboflavin, and nicotinic acid. The addition of bacteria to the solid substrate fermentation resulted in a strong increase of active vitamin B(12) in tempe. In the presence of the Rhizopus mold, the vitamin B(12) formation by C. freundii was three times higher than that of a fermentation without the mold.
journal_name
Biotechnol Advjournal_title
Biotechnology advancesauthors
Bisping B,Hering L,Baumann U,Denter J,Keuth S,Rehm HJdoi
10.1016/0734-9750(93)90016-gsubject
Has Abstractpub_date
1993-01-01 00:00:00pages
481-93issue
3eissn
0734-9750issn
1873-1899pii
0734-9750(93)90016-Gjournal_volume
11pub_type
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