منابع مشابه
Cyclic Photobiological Algal H2-production
Previous work from our laboratory demonstrated the feasibility of using sulfur-deprived algal cultures to photoproduce H2 continuously for 3-4 days (Melis et al., 2000; Ghirardi et al., 2000a). The production of H2 depends mostly on the photosynthetic H2O-oxidation activity of the cultures (Ghirardi et al., 2000 a and b; Kosourov et al., 2002), and requires concomitant operation of O2-consumpti...
متن کاملMolecular Engineering of Algal H2 Production
Hydrogen production by green algae has significant advantages over other photobiological systems: ATP production is not required, high theoretical efficiencies are possible, and water is used directly as the source of reductant without the need to produce biomass or to store intermediary carbon metabolites. However, algal H2 photoproduction is sensitive to O2, a coproduct of photosynthesis, and...
متن کاملDevelopment of an Efficient Algal H2-production System
The direct photoevolution of H2 from water by green algae is a transient phenomenon, due to the rapid inactivation of the reversible hydrogenase (the enzyme catalyzing the reduction of protons to H2) by O2, a by-product of photosynthesis. Moreover, the expression of the algal H2 production activity requires prolonged anaerobic treatment of the cells in order to induce the enzyme. We are address...
متن کاملImproved photobiological H2 production in engineered green algal cells.
Oxygenic photosynthetic organisms use solar energy to split water (H2O) into protons (H+), electrons (e-), and oxygen. A select group of photosynthetic microorganisms, including the green alga Chlamydomonas reinhardtii, has evolved the additional ability to redirect the derived H+ and e- to drive hydrogen (H2) production via the chloroplast hydrogenases HydA1 and A2 (H2 ase). This process occur...
متن کاملA new oxygen sensitivity and its potential application in photosynthetic H2 production.
We have discovered a new competitive pathway for O2 sensitivity in algal H2 production that is distinct from the O2 sensitivity of hydrogenase per se. This O2 sensitivity is apparently linked to the photosynthetic H2 production pathway that is coupled to proton translocation across the thylakoid membrane. Addition of the proton uncoupler carbonyl cyanide-p-trifluoromethoxy- phenylhydrazone elim...
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ژورنال
عنوان ژورنال: Applied Biochemistry and Biotechnology
سال: 1997
ISSN: 0273-2289,1559-0291
DOI: 10.1007/bf02787851