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- W2183653102 abstract "Oil palm mesocarp lipase was preserved and stabilized as the natural immobilized lipase (NIL) onto the oil palm mesocarp by four different immobilization treatments. The treatments consist of phosphate buffer 50mM (pH8.0), isopropyl alcohol, 2.25% glutaraldehyde and the combination of them. The stability of immobilized lipase was found to be highest in the treatment with 2.25% glutaraldehyde, followed by treatment with phosphate buffer pH8.0. This is because glutaraldehyde acts as a crosslinking agent in the immobilization of lipase. The synthesis of methyl oleate using immobilized lipase was investigated through esterification of oleic acid and methanol as substrate and hexane as reaction medium. The highest esterification production was 2.97 mmole in 16 hours. The hydrolysis activity of fatty acid and glycerol was found to be 0.257 mmole in 8 hours. The effects of immobilization on the stability of oil palm mesocarp lipase at higher temperatures and in organic solvent were also examined. Immobilized lipase showed higher esterification activity than free lipase or untreated and higher temperature stability up to 45oC. At 75oC, the untreated oil palm mesocarp completely lost its esterification activity whereas the immobilized lipase still posses 20% esterification activity. As a result, the immobilized oil palm mesocarp lipase was selected for the subsequent experiment of esterification of free fatty acid from palm oil fatty acid distillate (PFAD) with glycerol in hexane to produce mono and di- acylglycerols (MAG and DAG)." @default.
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- W2183653102 date "2009-01-01" @default.
- W2183653102 modified "2023-09-24" @default.
- W2183653102 title "IMMOBILIZATION OF OIL PALM MESOCARP LIPASE FOR THE PRODUCTION OF MONO AND DI-ACYLGLYCEROL" @default.
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