Document Detail


The nature of fatty acid modifies the equilibrium position in the esterification catalyzed by lipase.
MedLine Citation:
PMID:  10620267     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The equilibrium position in lipase mediated esterification of various fatty acids and butanol was studied. The influence of the chain length and the presence of unsaturations in the fatty acids on the equilibrium position was measured and predicted. To predict equilibrium position the program TREP extended (TREPEX) based on the UNIFAC group contribution method was used. Using an equilibrium constant of 35, calculated on the basis of thermodynamic activities, the equilibrium position between butanol and saturated and/or unsaturated fatty acids with different chain lengths can be predicted. The ester mole fraction at equilibrium increases with the fatty acid chain length, and for fatty acids with the same carbon number, the highest values are found for unsaturated fatty acids. For reaction systems containing two saturated fatty acids, a slightly higher mole fraction is obtained for the fatty acid with the higher chain length, while for mixtures consisting of saturated and unsaturated fatty acids, the mole fractions of the unsaturated esters are lower than those of the saturated ones, regardless the chain length of the fatty acid. These experimental results are in good agreement with the calculations with TREPEX.
Authors:
M V Flores; J J Sewalt; A E Janssen; A van der Padt
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Biotechnology and bioengineering     Volume:  67     ISSN:  0006-3592     ISO Abbreviation:  Biotechnol. Bioeng.     Publication Date:  2000 Feb 
Date Detail:
Created Date:  2000-02-15     Completed Date:  2000-02-15     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7502021     Medline TA:  Biotechnol Bioeng     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  364-71     Citation Subset:  IM    
Copyright Information:
Copyright 2000 John Wiley & Sons, Inc.
Affiliation:
Wageningen Agricultural University, Department of Food Technology and Nutritional Sciences, Division of Food and Bioprocess Engineering. P.O. Box 8129, 6700 EV Wageningen, The Netherlands.
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MeSH Terms
Descriptor/Qualifier:
Biotechnology
Butanols / metabolism
Candida
Esterification
Fatty Acids / chemistry*,  metabolism*
Fatty Acids, Unsaturated / chemistry*,  metabolism*
Fungal Proteins / chemistry,  metabolism
Lipase / metabolism*
Models, Chemical
Octanoic Acids / metabolism
Thermodynamics
Chemical
Reg. No./Substance:
0/Butanols; 0/Fatty Acids; 0/Fatty Acids, Unsaturated; 0/Fungal Proteins; 0/Octanoic Acids; 124-07-2/caprylic acid; EC 3.1.1.3/Lipase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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