Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 7-Day Trial for You or Your Team.

Learn More →

Enzymes in Nonaqueous SolventsSolid-Gas Catalysis at Controlled Water Activity

Enzymes in Nonaqueous Solvents: Solid-Gas Catalysis at Controlled Water Activity [The development of nonaqueous biocatalysis in recent years has expanded the field of applications of enzymes and cells in new bioprocesses. Systems involving biocatalysts suspended in organic solvents, supercritical fluids, or gas phases have overcome numerous problems associated with the use of aqueous media such as low solubility of hydrophobic substrates, unfavorable thermodynamic equilibrium for many reactions, and thermal instability of the bio-catalyst itself. Enzymes or cells, when used in low-water systems, were found to be efficient catalysts with the level of their activity being highly dependent on the degree of hydration. However, low mass transfer efficiency between liquid and solid phases in these nonconventional multiphase systems often remains a serious limitation. This chapter aims to discuss the utility of enzymes in bioreactors containing a mixture of substrates and water vapor as these reactors are relatively unexplored in comparison to those where enzymes are placed directly in aqueous or nonaqueous solvents.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Enzymes in Nonaqueous SolventsSolid-Gas Catalysis at Controlled Water Activity

Part of the Methods in Biotechnology Book Series (volume 15)
Editors: Vulfson, Evgeny N.; Halling, Peter J.; Holland, Herbert L.
Lamare, Sylvain; Legoy, Marie Dominique
Enzymes in Nonaqueous Solvents — Jan 1, 2001
Download PDF
10 pages

Loading next page...
 
/lp/springer-journals/enzymes-in-nonaqueous-solvents-solid-gas-catalysis-at-controlled-water-uPV0gLxWiP

References (12)

Publisher
Humana Press
Copyright
© Humana Press 2001
ISBN
978-0-89603-929-2
Pages
497–507
DOI
10.1385/1-59259-112-4:497
Publisher site
See Chapter on Publisher Site

Abstract

[The development of nonaqueous biocatalysis in recent years has expanded the field of applications of enzymes and cells in new bioprocesses. Systems involving biocatalysts suspended in organic solvents, supercritical fluids, or gas phases have overcome numerous problems associated with the use of aqueous media such as low solubility of hydrophobic substrates, unfavorable thermodynamic equilibrium for many reactions, and thermal instability of the bio-catalyst itself. Enzymes or cells, when used in low-water systems, were found to be efficient catalysts with the level of their activity being highly dependent on the degree of hydration. However, low mass transfer efficiency between liquid and solid phases in these nonconventional multiphase systems often remains a serious limitation. This chapter aims to discuss the utility of enzymes in bioreactors containing a mixture of substrates and water vapor as these reactors are relatively unexplored in comparison to those where enzymes are placed directly in aqueous or nonaqueous solvents.]

Published: Jan 1, 2001

Keywords: Water Activity; Saturation Pressure; Thermodynamic Activity; Fusarium Solani; Desulfovibrio Desulfuricans

There are no references for this article.