Physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein
The physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein (PS:PKO), ranging from 40% palm stearin to 80% palm stearin in 10% increments, were analyzed for their slip melting points (SMP), solid fat content (SFC), melting th...
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| Format: | Article |
| Language: | English English |
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AOCS Press
1998
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| Online Access: | http://psasir.upm.edu.my/id/eprint/51679/ http://psasir.upm.edu.my/id/eprint/51679/1/51679.pdf http://psasir.upm.edu.my/id/eprint/51679/7/J%20Americ%20Oil%20Chem%20Soc%20-%201998%20-%20Lai%20-%20Physical%20properties%20of%20Pseudomonas%20and%20Rhizomucor%20miehei%20lipase%E2%80%90catalyzed.pdf |
| _version_ | 1848851896964481024 |
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| author | Lai, Oi Ming Mohd Ghazali, Hasanah Chong, Chiew Let |
| author_facet | Lai, Oi Ming Mohd Ghazali, Hasanah Chong, Chiew Let |
| author_sort | Lai, Oi Ming |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein (PS:PKO), ranging from 40% palm stearin to 80% palm stearin in 10% increments, were analyzed for their slip melting points (SMP), solid fat content (SFC), melting thermograms, and polymorphic forms. The Pseudomonas lipase caused a greater decrease in SMP (15°C) in the PS:PKO (40:60) blend than the R. miehei lipase (10.5°C). Generally, all transesterified blends had lower SMP than their unreacted blends. Pseudomonas lipase-catalyzed blends at 40:60 and 50:50 ratio also showed complete melting at 37°C and 40°C, respectively, whereas for the R. miehei lipase-catalyzed 40:60 blend, a residual SFC of 3.9% was observed at 40°C. Randomization of fatty acids by Pseudomonas lipase also led to a greater decrease in SFC than the rearrangement of fatty acids by R. miehei lipase. Differential scanning calorimetry results confirmed this observation. Pseudomonas lipase also successfully changed the polymorphic forms of the unreacted blends from a predominantly β form to that of an exclusively β′ form. Both β and β′ forms existed in the R. miehei lipase-catalyzed reaction blends, with β′ being the dominant form. |
| first_indexed | 2025-11-15T10:29:28Z |
| format | Article |
| id | upm-51679 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T10:29:28Z |
| publishDate | 1998 |
| publisher | AOCS Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-516792024-08-05T03:54:26Z http://psasir.upm.edu.my/id/eprint/51679/ Physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein Lai, Oi Ming Mohd Ghazali, Hasanah Chong, Chiew Let The physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein (PS:PKO), ranging from 40% palm stearin to 80% palm stearin in 10% increments, were analyzed for their slip melting points (SMP), solid fat content (SFC), melting thermograms, and polymorphic forms. The Pseudomonas lipase caused a greater decrease in SMP (15°C) in the PS:PKO (40:60) blend than the R. miehei lipase (10.5°C). Generally, all transesterified blends had lower SMP than their unreacted blends. Pseudomonas lipase-catalyzed blends at 40:60 and 50:50 ratio also showed complete melting at 37°C and 40°C, respectively, whereas for the R. miehei lipase-catalyzed 40:60 blend, a residual SFC of 3.9% was observed at 40°C. Randomization of fatty acids by Pseudomonas lipase also led to a greater decrease in SFC than the rearrangement of fatty acids by R. miehei lipase. Differential scanning calorimetry results confirmed this observation. Pseudomonas lipase also successfully changed the polymorphic forms of the unreacted blends from a predominantly β form to that of an exclusively β′ form. Both β and β′ forms existed in the R. miehei lipase-catalyzed reaction blends, with β′ being the dominant form. AOCS Press 1998 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/51679/1/51679.pdf text en http://psasir.upm.edu.my/id/eprint/51679/7/J%20Americ%20Oil%20Chem%20Soc%20-%201998%20-%20Lai%20-%20Physical%20properties%20of%20Pseudomonas%20and%20Rhizomucor%20miehei%20lipase%E2%80%90catalyzed.pdf Lai, Oi Ming and Mohd Ghazali, Hasanah and Chong, Chiew Let (1998) Physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein. Journal of the American Oil Chemists' Society, 75 (8). pp. 953-959. ISSN 0003-021X; ESSN: 1558-9331 https://rd.springer.com/article/10.1007/s11746-998-0272-8 10.1007/s11746-998-0272-8 |
| spellingShingle | Lai, Oi Ming Mohd Ghazali, Hasanah Chong, Chiew Let Physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein |
| title | Physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein |
| title_full | Physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein |
| title_fullStr | Physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein |
| title_full_unstemmed | Physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein |
| title_short | Physical properties of Pseudomonas and Rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein |
| title_sort | physical properties of pseudomonas and rhizomucor miehei lipase-catalyzed transesterified blends of palm stearin:palm kernel olein |
| url | http://psasir.upm.edu.my/id/eprint/51679/ http://psasir.upm.edu.my/id/eprint/51679/ http://psasir.upm.edu.my/id/eprint/51679/ http://psasir.upm.edu.my/id/eprint/51679/1/51679.pdf http://psasir.upm.edu.my/id/eprint/51679/7/J%20Americ%20Oil%20Chem%20Soc%20-%201998%20-%20Lai%20-%20Physical%20properties%20of%20Pseudomonas%20and%20Rhizomucor%20miehei%20lipase%E2%80%90catalyzed.pdf |