Enzymatic hydrolysis of soybean oil using lipase from different sources to yield concentrated of polyunsaturated fatty acids |
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Authors: | Larissa Freitas Tânia Bueno Victor H Perez Júlio C Santos Heizir Ferreira de Castro |
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Institution: | 1.Engineering School of Lorena,University of S?o Paulo,Lorena,Brazil |
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Abstract: | The ability of three commercially available lipases to mediate the hydrolysis of the soybean oil to yield concentrated of
essential fatty acids was evaluated. The tested lipases were from microbial (Candida rugosa and Thermomyces lanuginosa) and animal cells (Porcine pancreatic lipase). In terms of free fatty acids, microbial lipases were more effective to promote
the enzymatic hydrolysis of the soybean oil (over 70%) than the porcine pancreatic lipase (24%). In spite of this, porcine
pancreatic lipase (PPL) showed the most satisfactory specificity towards both essential fatty acids and was, therefore, chosen
to carry out additional studies. An experimental design was performed taking into consideration the enzyme and NaCl amounts
as independent variables. The main effects were fitted by multiple regression analysis to a linear model and maximum fatty
acids concentration could be obtained using 3.0 wt% of lipase and 0.08 wt% of NaCl. The mathematical model representing the
hydrolysis degree was found to describe adequately the experimental results. Under these conditions, concentrations of 29.5 g/L
and 4.6 g/L for linoleic and linolenic acids, respectively, were obtained. |
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Keywords: | Experimental design Hydrolysis Linoleic acid (omega-6) Linolenic acid (omega-3) Lipase Soybean oil |
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