کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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70226 | 48816 | 2012 | 5 صفحه PDF | دانلود رایگان |
Enzymatic production of fatty acid esters from the esterification of oleyl alcohol with various fatty acids was investigated by using two new tetraethylammonium amino acid ionic liquids-coated Candida rugosa lipase (ILs-CRL) as biocatalysts in hexane. Both enzyme derivatives were prepared by mixing Candida rugosa lipase with tetraethylammonium l-histidinate (IL1) and tetraethylammonium l-asparaginate (IL2). The ILs-CRL system containing the equivalent protein concentration as in CRL showed higher esterification activity especially on medium chain fatty acids (C12–C16) as compared to non-coated CRL. Hydrophilicity of ILs may play an important role in hydrogen bonding with enzyme surface and consequently stabilize the ILs-CRL.
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► New tetraethylammonium amino acids ILs were used as a modifier with Candida rugosa lipase to produce two new biocatalysts (ILs-CRL).
► The activity of ILs-CRL was determined through esterification of oleyl alcohol with different fatty acids.
► The ILs-CRL system showed higher activity on short, medium and long chain fatty acids compared to native CRL.
► Hydrophilicity of ILs may play an important role to stabilize the ILs-CRL.
Journal: Journal of Molecular Catalysis B: Enzymatic - Volume 79, July 2012, Pages 61–65