Lipases catalyze the hydrolysis of long chain triglycerides. Microbial lipases are receiving much attention because of their industrial potential in the chemical, pharmaceutical, medical, cosmetic, biosurfactant synthesis, leather industries, mutation, agrochemicals and paper manufacturing industries. This article presents the isolation of maximum lipase producing bacteria and the optimization of different conditions for the maximum production of lipase. Bacillus subtilis PCSIRNL-39 shows maximum production of lipase at 45°C with pH 7 using nitrogen source peptone and carbon source sucrose. B. subtilis PCSIRNL-39 showed the best production at 5% inoculum size, while Ca 2+ and Mg 2+ were found best stimulator for enzyme production during the study. Tween 20 and 80 enhanced better lipase production than other surfactant. The kinetic parameters of V max and K m for the lipase were measured to be 101 µM/min.mL and 7.6 mg, respectively.
Improvement in egg production and egg size was noted when dietary rice polishing was replaced by carrot residue at 80 g kg-diet. The layers fed on a diet containing orange waste or mango peels showed results comparable with the control. Egg production and egg size were adversely affected when mango stone was added to the layers' diet.
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