Studies on the Enzymatic Synthesis of Sugar Esters in Organic Medium and Supercritical Carbon Dioxide

Stamatis, H; Sereti, V; Kolisis, FN

dc.contributor.author	Stamatis, H	en
dc.contributor.author	Sereti, V	en
dc.contributor.author	Kolisis, FN	en
dc.date.accessioned	2014-03-01T01:14:12Z
dc.date.available	2014-03-01T01:14:12Z
dc.date.issued	1998	en
dc.identifier.issn	0352-9568	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12921
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0001015502&partnerID=40&md5=8b768a4298e0f41e1c14d151341efca9	en
dc.subject	Hexane	en
dc.subject	Lipase	en
dc.subject	Sugar esters	en
dc.subject	Supercritical carbon dioxide	en
dc.subject.classification	Biotechnology & Applied Microbiology	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	LIPASE-CATALYZED ESTERIFICATION	en
dc.subject.other	FATTY-ACID-ESTERS	en
dc.subject.other	WATER ACTIVITY	en
dc.subject.other	SOLVENTS	en
dc.subject.other	ENZYMES	en
dc.subject.other	DIMETHYLFORMAMIDE	en
dc.subject.other	SOLUBILITY	en
dc.subject.other	RATES	en
dc.subject.other	CO2	en
dc.title	Studies on the Enzymatic Synthesis of Sugar Esters in Organic Medium and Supercritical Carbon Dioxide	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	The acylation of glucose and fructose by various fatty acids catalyzed by Rhizomucor miehei lipase in n-hexane and supercritical carbon dioxide was studied. The solvent-immiscible sugars were introduced in the reaction mixture adsorbed onto a solid support of silica gel or cellulose. The reaction parameters affecting the yield and the regioselectivity of the reaction such as the nature and the concentration of fatty acids as well as the water activity (a(w)) of the system were investigated. Typically, yields of about 50-60 % were obtained in both systems used when silica gel was used as solid support at a(w) = 0.48. However, at the same initial water activity (a(w) = 0.48), 10-15 % lower yields were obtained for the reaction with cellulose as a solid support. Sugar monoesters are the dominant products, but significant amount of sugar di- and triesters were also produced depending on the molar ratio of fatty acid to sugar used.	en
heal.publisher	CROATIAN SOC CHEMICAL ENGINEERING TECHNOLOGY	en
heal.journalName	Chemical and Biochemical Engineering Quarterly	en
dc.identifier.isi	ISI:000076091900005	en
dc.identifier.volume	12	en
dc.identifier.issue	3	en
dc.identifier.spage	151	en
dc.identifier.epage	156	en