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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, ...
Interesterification of fat blends rich in omega-3 polyunsaturated fatty acids c...
Osório, N.M.; Ribeiro, M.H.; Fonseca, M.M.R.; Ferreira-Dias, S.The interesterification of natural fats will improve certain physical and nutraceutical properties by modification of their acylglycerol profile. In this study, the effect of high pressure in the interesterification kinetics of fat blends, in solvent-free medium, catalysed by a commercial immobilized lipase from Thermomyces lanuginosa was evaluated. Reaction media were ternary blends of palm stearin, palm kerne...
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...
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