共查询到18条相似文献,搜索用时 479 毫秒
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离子液体作为酶催化反应的介质正越来越多的受到关注,因为与传统有机溶剂和水相比,酶在离子液体中表现出了更好的活性、热稳定性、立体选择性、对映体选择性和可循环性。本文综述了近几年来脂肪酶、氧化还原酶、蛋白酶在离子液体中的催化反应。 相似文献
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采用苯乙酮为模式底物,选用了3种典型的离子液体作为反应介质系统研究了离子液体与缓冲液构成的均相及两相体系中固定化光合细菌催化不对称还原反应的特性.通过对构建的离子液体反应体系进行条件优化,发现与水相及有机相相比,离子液体作为生物催化反应介质更有利于还原反应的进行,并且离子液体及固定化细胞易回收重复利用.研究结果表明,在... 相似文献
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离子液体中酶促区域选择性合成CFAE 总被引:1,自引:0,他引:1
碳水化合物脂肪酸酯(CFAE)作为一类非离子型生物表面活性剂,被广泛用于食品、医药及化妆品工业,一些CFAE还具有抗菌、抗肿瘤等特殊生物活性。非水介质中酶促区域选择性合成CFAE反应的瓶颈在于高极性碳水化合物与酰基供体不易相溶,并具有多个可酰化羟基。传统有机溶剂虽能提高极性底物在体系中溶解度,但常使酶活下降。新型绿色介质离子液体用于CFAE的酶法合成过程具有诸多优点,不仅生物催化剂能维持较好的活性与稳定性,且良好的底物溶解性可改善反应区域选择性及转化速率,反应体系还可重复利用。本文介绍了离子液体中影响酶促区域选择性合成CFAE反应的主要因素,包括酶、底物在离子液体中的溶解性能及底物自身性质等,详述了离子液体中酶促制备CFAE的研究进展,也指出了酶促合成CFAE存在的问题与发展前景。 相似文献
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Ionic liquids in enzymatic catalysis and biochemical methods of analysis: Capabilities and prospects
S. V. Muginova A. Z. Galimova A. E. Polyakov T. N. Shekhovtsova 《Journal of Analytical Chemistry》2010,65(4):331-351
The first Russian review systematizes and discusses the most important and promising published data on the use of ionic liquids
in biocatalysis and, especially, biochemical methods of analysis. Studies on the use of ionic liquids as solvents for enzymes,
new reaction media for enzymatic reactions, and components of the biosensitive layers of sensors are analyzed. The physical
and chemical properties of ionic liquids used in biocatalysis are discussed. The advantages of ionic liquids over the usual
solvents in homogeneous and heterogeneous reactions with the participation of enzymes from various classes are demonstrated,
procedures for the coimmobilization of biocatalysts and ionic liquids with cellulose onto polymer supports and electrodes
are described, and prospects for the use of enzyme-ionic liquid compositions in biochemical methods of analysis are considered. 相似文献
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Hasan Tanvir Imam Vladimír Krasan Martin Rebro Andrew Craig Marr 《Molecules (Basel, Switzerland)》2021,26(16)
Ionic liquids have unique chemical properties that have fascinated scientists in many fields. The effects of adding ionic liquids to biocatalysts are many and varied. The uses of ionic liquids in biocatalysis include improved separations and phase behaviour, reduction in toxicity, and stabilization of protein structures. As the ionic liquid state of the art has progressed, concepts of what can be achieved in biocatalysis using ionic liquids have evolved and more beneficial effects have been discovered. In this review ionic liquids for whole-cell and isolated enzyme biocatalysis will be discussed with an emphasis on the latest developments, and a look to the future. 相似文献
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Ashraf Ghanem Author Vitae 《Tetrahedron》2007,63(8):1721-1754
Over the last few years, there has been a dramatic increase in the number of publications in the field of lipase-catalyzed reactions performed in common organic solvents, ionic liquids or even non-conventional solvents. A fairly large percentage of these publications have emerged from organic chemists who have recognized the potential of biocatalysis as a viable and popular technique in organic synthesis. Considerable research has shown that reactions catalyzed by enzymes are more selective and efficiently performed than many of their analogues in the organic chemistry laboratory. This review article focuses on some of the recent developments in the rapidly growing field of lipase-catalyzed asymmetric access to enantiomerically pure/enriched compounds. The literature search is dated back to the last five years and covers some comprehensive examples. 相似文献
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Rodrigues JV Prosinecki V Marrucho I Rebelo LP Gomes CM 《Physical chemistry chemical physics : PCCP》2011,13(30):13614-13616
Protein stability is a major bottleneck in the biotechnological application of ionic liquid-containing solvents, either in the frame of biocatalysis or protein storage. Herein, differential scanning fluorimetry was successfully implemented as a high throughput method to fast scan the impact of a number of cholinium-based ionic liquids on the stability of proteins. 相似文献
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《印度化学会志》2021,98(11):100174
Quinoline and its derivatives have become significant compounds because of their variety of applications in medicine, synthetic chemistry, coordination chemistry, as well as in the field of industrial chemistry. This review will summarize the different conventional methods of synthesis of quinolines and also entrenching special technique approaches such as microwave-assisted synthesis, multicomponent reactions, solvent-free reaction conditions, ionic liquids, ultrasound promoted synthesis, phase-transfer catalyst, photocatalyst, heterogeneous, homogeneous, biocatalysis, etc. 相似文献
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在绿色化学研究领域,溶剂占据着重要的位置。作为一个绿色溶剂必须满足廉价易得、可生物降解、无毒、可循环使用、无挥发性等标准的要求。但是至今能满足这些要求的溶剂仍然非常有限。近年来,深共熔溶剂(Deep Eutectic Solvents,DESs)被认为可以作为绿色溶剂替代传统的有机溶剂而受到广泛关注。DESs是由两个或多个成分在特定比例下形成的凝固点大大降低室温液态混合物。与离子液体相比,DESs具有廉价、低毒、可生物降解等特点,在许多领域成为研究热点。本文综述了DESs的生物降解性、毒性/细胞毒性及其作为生物催化反应介质的研究现状。基于对研究现状的认识,对DESs未来研究、应用需要解决的问题进行了讨论。作者期望对DESs生物催化应用研究现状的综述更进一步促进DESs研究、应用的发展。 相似文献