Enterobacter aerogenesの発酵水素発生と利用基質について

概要

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Several kinds of substrates were examined to find whether Enterobacter aerogenes strain E. 82005 could evolve hydrogen from these substrates with peptone as a nitrogen source. Among some carbohydrates and their related compounds, pentoses and saccharides were generally good sources of hydrogen evolution. Above all, gluconic acid which is an oxide of glucose, was degraded to hydrogen about 1.4 times faster than glucose. Yield of hydrogen from mannitol or sorbitol was about 1.6 mol/mol-substrate, though about 1.0 mol/mol-substrate from glucose. In case of sucrose or maltose, the hydrogen yield of substrate was about 1.5 times larger than that of glucose per weight. Thus, these substrates were very efficient in energy conversion. The bacteria could grow in lactose under aerobic conditions, though with difficulty under anaerobic conditions. Formate was slowly degraded to hydrogen. The rate of hydrogen evolution was about one half of that of glucose. Some carbonates were used for growth of the bacteria, though not degraded to hydrogen. Yields of cell mass from L-ascorbic acid, gluconic acid, and mannitol were very large. Particularly, the yield from mannitol was about twice that from glucose.
公益社団法人日本生物工学会の論文
1989-01-25