Enzymatic destruction kinetics of oil palm fruits by microwave sterilization
Microwave sterilization of oil palm fruit is carried out to deactivate lipase and soften the fruits. This study is aims to determine enzymatic destruction kinetics from microwave sterilization of oil palm fruits such as decimal reduction time (D-value), temperature sensitivity (z-value), kinetic con...
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my.utm.404052019-03-26T08:07:59Z http://eprints.utm.my/id/eprint/40405/ Enzymatic destruction kinetics of oil palm fruits by microwave sterilization Maya Sarah, Maya Sarah Taib, Mohd. Rozainee QD Chemistry Microwave sterilization of oil palm fruit is carried out to deactivate lipase and soften the fruits. This study is aims to determine enzymatic destruction kinetics from microwave sterilization of oil palm fruits such as decimal reduction time (D-value), temperature sensitivity (z-value), kinetic constant (k) and activation energy (Ea). Three power levels (medium, medium high and high) of the microwave oven were used and lipase assayed was conducted to determine the lipase activity. Microwave sterilization of oil palm fruits depends on the destruction kinetic parameters such as D-value, z-value and Ea. It required only 8.333 to 16.949 minutes to deactivate the lipase, and the process is not temperature sensitive which is indicated by z-value. The z-value indicated requirement to increase temperature up to 71.5, 77.0 and 83.0oC respectively from initial maximum temperature to reduce the D-value. Minimum energy required to start the destruction process of lipase was 13.927 to 14.049 kJ/mole obtained from microwave sterilization of 1 kg oil palm fruits at all power levels. Oil quality observed from free fatty acid (FFA) concentration that indicated FFA below 3.5%. 2013 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/40405/1/MayaSarah2013_EnzymaticDestructionKineticsofOilPalm.pdf Maya Sarah, Maya Sarah and Taib, Mohd. Rozainee (2013) Enzymatic destruction kinetics of oil palm fruits by microwave sterilization. International Journal of Chemical Engineering and Applications, 4 (3). pp. 129-133. ISSN 2010-0221 http://dx.doi.org/10.7763/IJCEA.2013.V4.278 DOI:10.7763/IJCEA.2013.V4.278 |
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QD Chemistry Maya Sarah, Maya Sarah Taib, Mohd. Rozainee Enzymatic destruction kinetics of oil palm fruits by microwave sterilization |
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Microwave sterilization of oil palm fruit is carried out to deactivate lipase and soften the fruits. This study is aims to determine enzymatic destruction kinetics from microwave sterilization of oil palm fruits such as decimal reduction time (D-value), temperature sensitivity (z-value), kinetic constant (k) and activation energy (Ea). Three power levels (medium, medium high and high) of the microwave oven were used and lipase assayed was conducted to determine the lipase activity. Microwave sterilization of oil palm fruits depends on the destruction kinetic parameters such as D-value, z-value and Ea. It required only 8.333 to 16.949 minutes to deactivate the lipase, and the process is not temperature sensitive which is indicated by z-value. The z-value indicated requirement to increase temperature up to 71.5, 77.0 and 83.0oC respectively from initial maximum temperature to reduce the D-value. Minimum energy required to start the destruction process of lipase was 13.927 to 14.049 kJ/mole obtained from microwave sterilization of 1 kg oil palm fruits at all power levels. Oil quality observed from free fatty acid (FFA) concentration that indicated FFA below 3.5%. |
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Article |
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Maya Sarah, Maya Sarah Taib, Mohd. Rozainee |
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Maya Sarah, Maya Sarah Taib, Mohd. Rozainee |
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Maya Sarah, Maya Sarah |
title |
Enzymatic destruction kinetics of oil palm fruits by microwave sterilization |
title_short |
Enzymatic destruction kinetics of oil palm fruits by microwave sterilization |
title_full |
Enzymatic destruction kinetics of oil palm fruits by microwave sterilization |
title_fullStr |
Enzymatic destruction kinetics of oil palm fruits by microwave sterilization |
title_full_unstemmed |
Enzymatic destruction kinetics of oil palm fruits by microwave sterilization |
title_sort |
enzymatic destruction kinetics of oil palm fruits by microwave sterilization |
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2013 |
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http://eprints.utm.my/id/eprint/40405/1/MayaSarah2013_EnzymaticDestructionKineticsofOilPalm.pdf http://eprints.utm.my/id/eprint/40405/ http://dx.doi.org/10.7763/IJCEA.2013.V4.278 |
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