共查询到20条相似文献,搜索用时 15 毫秒
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脂肪酶催化合成生物表面活性剂 总被引:4,自引:0,他引:4
脂肪酸单甘油酯、脂肪酸糖酯、聚甘油脂肪酸酯和长链脂肪酸蜡酯是重要的生物表面活性剂。传统化学法以碱为催化剂在高温下进行,不仅能耗高且产品纯度低。脂肪酶作为一种天然生物催化剂,可以温和条件下催化合成上述生物表面活性剂,能耗低且产品纯度高。综述对脂肪酶催化合成生物表面活笥剂工艺路线、反应体系及操作参数。 相似文献
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Sung-Chyr Lin 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1996,66(2):109-120
Surfactants find applications in a wide variety of industrial processes. Biomolecules that are amphiphilic and partition preferentially at interfaces are classified as biosurfactants. In terms of surface activity, heat and pH stability, many biosurfactants are comparable to synthetic surfactants. Therefore, as the environmental compatibility is becoming an increasingly important factor in selecting industrial chemicals, the commercialization of biosurfactant is gaining much attention. In this paper, the general properties and functions of biosurfactants are introduced. Strategies for development of biosurfactant assay, enhanced biosurfactant production, large scale fermentation, and product recovery are discussed. Also discussed are recent advances in the genetic engineering of biosurfactant production. The potential applications of biosurfactants in industrial processes and bioremediation are presented. Finally, comments on the application of enzymes for the production of surfactants are also made. 相似文献
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生物表面活性剂在油田中的应用 总被引:3,自引:0,他引:3
生物表面活性剂和化学表面活性剂一样 ,有亲水基团和疏水基团 ,它是由微生物生长在水不溶的物质中并以它为食物源产生的。在油田中 ,生物表面活性剂是微生物提高采收率的重要机理 ,具有水溶性好、反应产物均一、无毒、安全、驱油效果好等特点。生物表面活性剂有 4种类型 :糖脂类、磷脂类、脂蛋白或缩氨酸脂和聚合物类。大多数生物表面活性剂是糖脂 ,是碳水化合物连接在长链脂肪酸上。目前 ,室内研究主要是研究各种反应条件对微生物产生生物表面活性剂和生物表面活性剂对原油的影响。矿场实验有地面发酵和地下发酵两种形式。从生物表面活性剂的特点、筛选产生生物表面活性剂的菌种、生物表面活性剂的类型、室内研究、矿场实验和今后的发展方向等 6个方面综述了油田中的生物表面活性剂的应用 相似文献
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微生物合成的糖脂类生物表面活性剂 总被引:4,自引:0,他引:4
介绍了糖脂类生物表面活性剂的种类、理化特性、微生物合成的方法及应用和发展趋势。相对于化学合成的表面活性剂,微生物糖脂具有可生物降解、在高温或极端pH环境下仍然有效和无毒或低毒等优点,有些微生物糖脂还表现出高效的抗菌、防霉和抗病毒特性。但目前通过微生物合成糖脂的生产成本仍比化学合成的高,因此降低其生产成本是当前研究开发的热点和主要发展方向。 相似文献
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生物表面活性剂的开发和应用 总被引:17,自引:2,他引:17
生物表面活性剂经过三十年的发展,现分为发酵法和酶法合成两个分支。生物表面活性剂的品种包括中性类脂、磷脂/脂肪酸、糖脂、含氨基酸类脂,聚合型和特殊型生物表面活性剂。 相似文献
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脂肽类生物表面活性剂研究进展 总被引:11,自引:0,他引:11
脂肽是由微生物代谢产生的一类具有很强表面活性的生物表面活性剂,在医药、环境保护、化妆品和微生物采油等方面有良好的应用潜力。该文对脂肽的生产、分离、鉴定及应用进展进行了综述。引用文献45篇。 相似文献
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综述了生物表面活性剂的特性、分类及生产方法,重点介绍了几种生物表面活性剂在化妆品行业中的应用。指出,降低成本是未来生物表面活性剂研究发展的方向。 相似文献
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Biosurfactants can be classified by their chemical composition and their origin. This review briefly describes various classes of biosurfactants based on their origin and introduces a few of the most widely used biosurfactants. The current status and future trends in biosurfactant production are discussed, with an emphasis on those derived from plants. Following a brief introduction of the properties of microbubbles, recent progress in the application of microbubble technology to molecular imaging, wastewater treatment, and aerobic fermentation are presented. Several studies on the preparation, characterization and applications of biosurfactant-based microbubbles are reviewed. 相似文献
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氨基葡萄糖盐酸盐的防腐抗菌作用研究 总被引:15,自引:0,他引:15
研究了氨基葡萄糖盐酸盐 (GAH)的抗菌作用。结果发现 ,GAH对所测试的 2 1种常见食品腐败菌均有抗菌作用 ,最小抑菌质量浓度对细菌为 0 5g/L ,对霉菌为 2g/L ,对酵母菌为 1g/L。此外 ,将GAH作为防腐剂应用于马蹄原汁保藏时显示了很好的防腐效果。 相似文献
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Danyelle Khadydja F. Santos Raquel D. Rufino Juliana M. Luna Valdemir A. Santos Leonie A. Sarubbo 《International journal of molecular sciences》2016,17(3)
In the era of global industrialisation, the exploration of natural resources has served as a source of experimentation for science and advanced technologies, giving rise to the manufacturing of products with high aggregate value in the world market, such as biosurfactants. Biosurfactants are amphiphilic microbial molecules with hydrophilic and hydrophobic moieties that partition at liquid/liquid, liquid/gas or liquid/solid interfaces. Such characteristics allow these biomolecules to play a key role in emulsification, foam formation, detergency and dispersal, which are desirable qualities in different industries. Biosurfactant production is considered one of the key technologies for development in the 21st century. Besides exerting a strong positive impact on the main global problems, biosurfactant production has considerable importance to the implantation of sustainable industrial processes, such as the use of renewable resources and “green” products. Biodegradability and low toxicity have led to the intensification of scientific studies on a wide range of industrial applications for biosurfactants in the field of bioremediation as well as the petroleum, food processing, health, chemical, agricultural and cosmetic industries. In this paper, we offer an extensive review regarding knowledge accumulated over the years and advances achieved in the incorporation of biomolecules in different industries. 相似文献