Abstract
Lipases from plant and microbial sources were screened for lipolysis of rice bran oil (RBO). Oat lipase was found to give reproducibly 60% lipolysis. Factors affecting the efficiency of lipolysis such as oil:emulsifier ratio, duration of homogenization for the substrate preparation, substrate:enzyme ratio, substrate pH, kinetics of lipolysis and efficiency of lipase as a function of pH, oat particle size, its quality and reuseability were studied to assess the feasibility of using of oat lipase for splitting RBO commercially. The efficiency of lipolysis was optimal at (a) RBO:emulsifier (0.5:1) ratio, homogenized for 2.5 min, (b) pH 7.5 and (c) substrate:enzyme ratio of 5 ml: 2 g.
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