- Chemically Modified Lipase from Thermomyces lanuginosus with Enhanced Esterification and Transesterification Activities
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Lipase from Thermomyces lanuginosus is one of the most explored enzymes for the esterification of several added-value industrial compounds, such as biodiesel, fragrances, and flavors. Its selectivity in these reactions is mostly related with its activity towards small alcohols. In this work, the impact of the chemical modification, with 4 dodecyl chains at its surface, was evaluated regarding its transesterification and esterification activities, comparing with the native form. Linear size-differentiated alcohols (from 1 to 20 carbons in the aliphatic chain) were used to explore for the first time the effect of the chain length in both transesterification and esterification reactions, using p-nitrophenyl palmitate and oleic acid as model compounds, respectively. The chemically modified lipase showed an outstanding improvement of its catalytic performance than the native enzyme, being this increase directly proportional to the size of the alcohols chain used as substrates. The enormous potential and remarkable versatility of this novel super catalyst was here demonstrated, where diverse types of esters, differing in their potential applications (biodiesel, cosmetics, fine chemistry), were efficiently synthesized. The produced esters were fully characterized by 1H NMR, GC-MS, and FTIR.
- Noro, Jennifer,Cavaco-Paulo, Artur,Silva, Carla
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p. 4524 - 4531
(2021/09/02)
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- PRODUCTION METHOD OF ESTER COMPOUND
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PROBLEM TO BE SOLVED: To produce an ester compound at a high conversion even under mild reaction conditions. SOLUTION: A production method of an ester compound includes a reaction step for reacting a carboxylic acid of 8-22 carbons and an alcohol of 8-22 carbons at a temperature of 50-100°C in an ionic liquid composed of a phosphonium cation or an imidazolium cation and a trifluoromethanesulfonic acid anion or a bis (trifluoromethanesulfonyl) imide anion to obtain an ester compound in a liquid phase different from an ionic liquid phase. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT
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Paragraph 0030; 0033
(2019/10/01)
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- MACROMOLECULAR CORROSION (MCIN) INHIBITORS: STRUCTURES, METHODS OF MAKING AND USING THE SAME
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Disclosed are multifunctional compounds represented by structural formula (I), methods of producing compounds represented by structural formula (I) and their use in inhibiting corrosion in corrodible material.
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Page/Page column 79; 80
(2018/09/21)
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- Synthesis and analysis of the C1-C18 alkyl oleates
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The C1-C18 alkyl oleates were prepared in n-hexane by esterification of oleic acid with either the primary and secondary C1-C6 alcohols or the primary fatty C8-C18 alcohols. The esterification was acid-catalyzed in the presence of p-toluene sulfonic acid (p-TSA) in a pseudo-homogeneous phase, or in the presence of the sulfonic macroporous resin (K2411) in the heterogeneous phase. The purified alkyl oleates were characterized by 13C-NMR. The oleic acid/alkyl oleate mixtures were analyzed by high-performance liquid chromatography (HPLC).
- Vieville, Corinne,Mouloungui, Zephirin,Gaset, Antoine
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p. 101 - 108
(2007/10/02)
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- Synthesis of Fatty Acid Ester by Corynebacterium sp. S-401
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Resting cells and acetone-dried cells of Corynebacterium sp.S-401 catalyzed the fatty acid ester synthesis of various alcohols and fatty acids.These reactions were carried out in phosphate buffer and/or organic solvents.In some cases synthetic reactions of esters in nonpolar solvents, such as n-hexane and benzene, gave better results compared with those obtained in phosphate buffer.
- Seo, Chull Won,Yamada, Yasuhiro,Okada, Hirosuke
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p. 405 - 410
(2007/10/02)
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