Publication Detail

Enzymatic oxidation of ethanol in the gaseous phase.

Eduardo Barzana Garcia, Marcus Karel, Alexander M Klibanov
MITSG 89-19P

Enzymes have proven to be active when suspended in organic solvents containing little or no water or supercritical fluids, thus expanding significantly the range of reactions which can be carried out via biocatalysis. The transformation of gaseous substrates by dehydrated enzymes is also emerging as a new biotechnological concept. Water activity is critical in such systems. This report discusses the effect of water on alcohol oxidase acting on ethanol vapors. Enzyme activity increases when water is increased, whereas thermostability decreases. Enhanced thermostability causes an increase in the temperature optimum of the gas phase reaction. The reaction appears to occur by direct interaction of the gaseous substrate with the enzyme.

type: Technical reports

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