4 documents found, page 1 of 1
Modelling and optimization of ethyl butyrate production catalysed by Rhizopus o...
Grosso, C.; Ferreira-Dias, Suzana; Pires-Cabral, P.Response surface methodology was used to model and optimise the production of ethyl butyrate, catalysed by Rhizopus oryzae lipase immobilised in a hydrophilic polyurethane foam. Experiments were carried out following a central composite rotatable design, as a function of reaction temperature (T: 22–38 C) initial butyric acid concentration (A: 0.031–0.619 M) and initial molar ratio ethanol/acid (MR; 0.257–2.443)...
Production of olive oil enriched with medium chain fatty acids catalysed by com...
Nunes, P.A.; Pires-Cabral, P.; Ferreira-Dias, S.Structured triacylglycerols, containing medium chain fatty acids, were produced by acidolysis of virgin olive oil with caprylic or capric acid, at a molar ratio of olive oil:fatty acid of 1:2, at 45 C for 24 h, in solvent- free media or in n-hexane, catalysed by Thermomyces lanuginosa (Lipozyme TL IM), Rhizomucor miehei (Lipozyme RM IM) and Candida antarctica (Novozym 435) immobilised lipases. Incorporations we...
Synthesis of ethyl butyrate in organic media catalized by Candida rugosa lipase...
Pires-Cabral, P.; Fonseca, M.M.R. da; Ferreira-Dias, S.A kinetic study on the synthesis of ethyl butyrate in n-hexane, catalyzed by Candida rugosa lipase immobilized in two hydrophilic polyurethane foams (“HYPOL FHP 2002” and “HYPOL FHP 5000”)was performed. With the “FHP5000” foams, esterification rates and conversion were always higher than those obtained with “FHP2002”. For both immobilized preparations, BA did not cause any inhibition on the enzymatic activity, ...
Modelling the production of ethyl butyrate catalysed by Candida rugosa lipase i...
Pires-Cabral, P.; Fonseca, M.M.R.; Ferreira-Dias, S.Response surface methodology was used to model and optimise the esterification of ethanol with butyric acid in n-hexane, catalysed by Candida rugosa lipase immobilised in two hydrophilic polyurethane foams (“FHP 2002TM” and “FHP 5000TM”). Experiments were carried out following central composite rotatable designs (CCRD), as a function of the initial water activity of the biocatalyst (aw), initial butyric acid co...