Degradation of diketones by polyvinyl alcohol-degrading enzyme produced by Pseudomonas sp.

Hydrogenase is an enzyme which reversibly activates molecular hydrogen. As a result of this unique ability, hydrogenase holds a promise of having a variety of important practical uses. In this review, the reactions catalyzed by, the occurrence of, and the enzymatic properties of hydrogenases are outlined, followed by a discussion of stabilisation and immobilisation of the enzyme. Among the biotechnological applications of hydrogenase considered are solar energy conversion and storage, cofactor regeneration, production of specialty chemicals using H 2 as the ultimate reductant, detritiation of aqueous effluents of nuclear power plants and heavy water production, H 2 production from organic wastes, hydrogen-oxygen fuel cells, and catalysis of electrode processes. It is pointed out that the use of hydrogenase in any practical process which either consumes or evolves hydrogen may be beneficial and should be evaluated