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|Type:||Capítulo de livro|
|Title:||Microbial Transformations Of Oleic Acid|
Madeira Jr. J.V.
|Abstract:||Oleic acid is one of the most important vegetable oils fatty acids within differentindustrial fields. This monounsaturated fatty acid is extensively found in olive, corn, andsoybean oils, among others. Its importance varies from health-promoting properties, suchas the prevention of cardiovascular diseases and some types of cancer, to manytechnological applications, taking into account the oxidative stability of this oil. Oneimportant application of oleic acid is its use for obtaining different compounds throughmicrobial transformations and biocatalytic processes. These steps include hydration orepoxidation of the double bond, reduction of carboxylic acid and combinations of thesereactions. An important group that can be obtained through transformation of oleic acid isthe hydroxy fatty acids (HFA) and their derivatives. They are used in cosmetics, paintsand coatings, lubricants and in the food industry. Several microorganisms, which includebacterial and yeast strains, produce HFA from oleic acid, such as in the obtainment of (E)10-hydroxy-8-octadecenoic acid, using a Pseudomonas sp. 42A2 strain. 10-hydroxyoctadecanoic acid can be produced by Nocardia cholesterolicum, Rhodococcussp. and Saccharomyces cerevisiae. These compounds are examples of monohydroxyderivatives of oleic acid and have a diverse potential for application in the food industry,considering its similarity with ricinoleic acid. Added to the possibility ofbiotransformation of oleic acid using microbial cells, the use of isolated lipases for theproduction of other compounds from oleic acid and/or triacylglycerols containing oleicacid have been reported, as well as the production of structured lipids by acydolysis ofdifferent oil sources with free fatty acid mixtures. These reactions are catalyzed bymicrobial lipases from different microorganisms like Rhizomucor miehei, andThermomyces lanuginosus. Therefore, this review reports the use of free oleic acid and/or different oils containing oleic acid in their compositions for the obtaining of differentimportant compounds, with the use of microbial cells by biotransformation of oleic acid,or by biocatalytic reactions using isolated microbial lipases. © 2013 Nova Science Publishers, Inc. All rights reserved.|
|Editor:||Nova Science Publishers, Inc.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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