* Mechanisms for hydrogen production by different bacteria during mixed-acid and photo-fermentation and perspectives of hydrogen production biotechnology.
- H2 has a great potential as an ecologically-clean, renewable and capable fuel. It can be mainly produced via hydrogenases (Hyd) by different bacteria, especially Escherichia coli and Rhodobacter sphaeroides. The operation direction and activity of multiple Hyd enzymes in E. coli during mixed-acid fermentation might determine H2 production; some metabolic cross-talk between Hyd enzymes is proposed. Manipulating the activity of different Hyd enzymes is an effective way to enhance H2 production by E. coli in biotechnology. Moreover, a novel approach would be the use of glycerol as feedstock in fermentation processes leading to H2 production. Mixed carbon (sugar and glycerol) utilization studies enlarge the kind of organic wastes used in biotechnology. During photo-fermentation under limited nitrogen conditions, H2 production by Rh. sphaeroides is observed when carbon and nitrogen sources are supplemented. The relationship of H2 production with H(+) transport across the membrane and membrane-associated ATPase activity is shown. On the other hand, combination of carbon sources (succinate, malate) with different nitrogen sources (yeast extract, glutamate, glycine) as well as different metal (Fe, Ni, Mg) ions might regulate H2 production. All these can enhance H2 production yield by Rh. sphaeroides in biotechnology Finally, two of these bacteria might be combined to develop and consequently to optimize two stages of H2 production biotechnology with high efficiency transformation of different organic sources.
=>可能性のある, 可能な, 潜在力のある, 位置の, 電位の, 潜在的な, ポテンシャル, 可能性, 電位
Overview of noun potential
The noun potential has 2 senses (first 1 from tagged texts)
1. (10) potential, potentiality, potency -- (the inherent capacity for coming into being)
2. electric potential, potential, potential difference, potential drop, voltage -- (the difference
in electrical charge between two points in a circuit expressed in volts)
Overview of adj potential
The adj potential has 2 senses (first 2 from tagged texts)
1. (7) potential, possible -- (existing in possibility; "a potential problem"; "possible uses of
nuclear power")
2. (6) likely, potential -- (expected to become or be; in prospect; "potential clients")
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