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dc.contributorMarkoš, Jozef
dc.creatorKnežević Jugović, Zorica
dc.creatorJakovetić, Sonja
dc.creatorJugović, Branimir
dc.creatorGvozdenović, Milica M.
dc.creatorGrbavčić, Sanja
dc.creatorBezbradica, Dejan
dc.creatorAntov, Mirjana
dc.date.accessioned2017-06-10T15:45:07Z
dc.date.issued2012
dc.identifier.isbn9788089475049
dc.identifier.urihttp://dais.sanu.ac.rs/123456789/493
dc.description.abstractThe esterification activity of the commercial immobilized lipase CALB towards cinnamic acids and its derivative has been studied. Using cinnamic acid as substrate, the reaction rate constants (1.95 h-1 mM-1 for ethanol and 3.07 h-1 mM-1 for butanol) were more than four and nine times higher compared to those obtained with p-coumaric (0.47 h-1 mM-1) and p-methoxycinnamic acids (0.32 h-1 mM-1), respectively. Thus, esterification of cinnamic acid with ethanol by using C. antarctica lipase has selected as a model reaction for further study. Isooctane is shown to be the best solvent for this reaction even though solubility of cinnamic acid in this a polar solvent is very low. Highest esterification yield of ethyl cinnamate is obtained when initial molar ratio of substrates 1:3 (cinnamic acid is limiting substrate) is used. Esterification of cinnamic acid appeared to result in increasing radical-scavenging ability. The effect of esterification of cinnamic acid was also confirmed by electrochemical method using ethyl cinnamate which appeared to enhance the antioxidant activity. These findings should stimulate the application of such lipase-catalyzed reactions for the preparation of food acceptable esters of cinnamic acid as potential lipophilic antioxidants.en
dc.format(2012) 1426-1432
dc.formatapplication/pdf
dc.languageen
dc.publisherTatranské Matliare : Slovak Society of Chemical Engineering
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/46010/RS//
dc.rightsopenAccess
dc.sourceProceedings of the 39th International Conference of Slovak Society of Chemical Engineeringen
dc.subjectphenolic acid esters
dc.subjectenzymatic esterification
dc.subjectethyl cinnamate
dc.subjectCandida antarctica lipase
dc.subjectradical-scavenging activity
dc.subjectantioxidant activity
dc.subjectcyclic voltammetry
dc.titleEnzymatic Synthesis of Aliphatic Esters of Phenolic Acids and Evaluation of Their Antioxidant Propertiesen
dc.typeconferenceObject
dc.rights.licenseBY-NC-ND
dcterms.abstractКнежевић Југовић, Зорица; Јаковетић, Соња; Југовић, Бранимир; Гвозденовић, Милица; Грбавчић, Сања; Безбрадица, Дејан; Aнтов, Мирјана;
dc.citation.spage1426
dc.citation.epage1432
dc.type.versionpublishedVersion
dc.identifier.fulltexthttp://dais.sanu.ac.rs/bitstream/id/21477/490.pdf


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