In this paper the immobilisation of the lipase enzyme on a M41S type mesoporous material support is presented. Different M41S type materials, with a pore diameter ranging from 37 A to 48 A, were synthesised starting from different silica sources, in order to immobilise, by physical adsorption, lipase with a spherical molecular diameter close to 41 A. The efficiency of the immobilisation carried out at an optimal pH=7, different temperatures and time, were tested by UV Spectrophotometry. The maximun amount of bound lipase resulted to be around 472 mg at 0°C compared to the 362 mg at 25°C and 119 mg at 40°C. Indeed, the maximun immobilisation efficiency is around 47%. The activity of enzyme immobilised was tested by hydrolysis of triglycerides in olive oil into fatty acids and the lipase immobilised has 78% of the activity of the free enzyme.
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