Alcoholysis and Glyceride Synthesis with Immobilized Lipase on Controlled-Pore Glass of Varying Hydrophobicity in Supercritical Carbon Dioxide
| Autor: | Kristin Wannerberger, Björn Sivik, Helga Gunnlaugsdottir |
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| Rok vydání: | 1998 |
| Předmět: |
Chromatography
Ethanol Supercritical carbon dioxide biology Immobilized enzyme Glyceride Triacylglycerol lipase Substrate (chemistry) Bioengineering biology.organism_classification Applied Microbiology and Biotechnology Biochemistry chemistry.chemical_compound chemistry biology.protein Organic chemistry Candida antarctica Lipase Biotechnology |
| Zdroj: | Enzyme and Microbial Technology. 22:360-367 |
| ISSN: | 0141-0229 |
| DOI: | 10.1016/s0141-0229(97)00212-3 |
| Popis: | Lipases from Humicola lanuginosa and Candida antarctica lipase B were adsorbed onto methylated controlled-glass beads with varying degrees of hydrophobicity. The effect of support hydrophobicity on the amount of lipase adsorbed was studied. The immobilized lipases were examined for their activity in an alcoholysis reaction of cod liver oil with ethanol in supercritical carbon dioxide. Furthermore, the activity of the immobilized Humicola lanuginosa lipase in glyceride synthesis in supercritical carbon dioxide was studied. For both lipases investigated, the amount adsorbed decreased with decreasing hydrophobicity of the support; moreover, for Humicola lanuginosa lipase, the lipolytic activity was found to depend largely on the substrate and the hydrophobicity of the immobilization support. In the alcoholysis reaction, a highly hydrophobic carrier enhanced lipase activity whereas in glyceride synthesis, the reverse effect was observed. For Candida antarctica lipase, the support hydrophobicity did not affect the activity of the lipase. In addition, the results showed that the lipid class composition of the reaction mixture reflected the lipolytic activity of the lipases immobilized on the different supports tested. |
| Databáze: | OpenAIRE |
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