EFFECT OF TEMPERATURE ON THE KINETICS OF ENZYMATIC HYDROLYSIS OF SARDINE OIL BY DIFFERENT LIPASES
EFFECT OF TEMPERATURE ON THE KINETICS OF ENZYMATIC HYDROLYSIS OF SARDINE OIL BY DIFFERENT LIPASES
DOI: https://doi.org/10.22533/at.ed.813422408027
Palavras-chave: hidrólisis, parámetros cinéticos, modelo reversible de Michaellis-Menten, actividad enzimática
Keywords: hydrolysis, kinetic parameters, Michaelis-Menten reversible model, enzymatic activity
Abstract: In the present work, the effect of temperature on the partial enzyme-catalysed hydrolysis of sardine oil by three different lipases was studied: Candida rugosa AY-30, Rhizopus oryzae FAP-15 and Burkoldheria cepacian PS-CI. The reaction was carried out in glass flasks containing an emulsion of sardine oil:phosphate buffer solution of pH 7.0 (40:60 v/v) and 0.05 g of the different enzymes. The resulting mixtures were placed on magnetic stirring plates inside of an incubator at 20, 30, 40, 50 and 60°C. Samples were withdrawn at different reaction times. To describe the global hydrolysis, a reversible Michaelis-Menten model was considered, which includes an "α-factor" that considers the loss of enzymatic activity due to thermal denaturing. PS-CI lipase exhibited both the greatest enzymatic activity and thermal stability, reaching a hydrolysis degree of 0.468 at 24 h. The kinetic parameters of the models were estimated by non-linear regression with restrictions in a MATLAB® platform (R2018b), with a coefficient of determination (Rprom2 >0.93).
- JUAN ANTONIO NORIEGA RODRÍGUEZ
- Christian Correa Leyva
- Esther Carrillo Pérez
- Abraham Rogelio Martin García
- Ramiro Baeza Jiménez