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核酸适配体是通过指数富集的配体系统进化(systematic evolution of ligands by exponential enrichment,SELEX)技术在体外筛选到的单链寡核苷酸,与靶标具有高亲和力和特异性,且稳定性好,易于合成和修饰,被认为是生物传感器的理想识别元件之一,在农药残留快速检测应用中表... 相似文献
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菊糖的功能及其在食品工业中的应用 总被引:14,自引:3,他引:11
菊糖是一种天然碳水化合物,它由果糖分子通过β(2-1)键连接,所以不被机体消化吸收而能被肠道微生物利用,具有较多的生理营养功能;另外,独特的流变学性质使其成为优良的质构改良剂。菊糖作为一种新的食品配料,在食品工业中有着广阔的应用前景。 相似文献
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天然活性单萜--柠檬烯的研究进展 总被引:67,自引:0,他引:67
柠檬烯是一种天然的功能单萜,在食品中作为香精香料添加剂被广泛使用。近来研究发现,柠檬烯具有多种生理作用,特别是有很好的抗癌活性。本系统地介绍了柠檬烯的物化性质、生理功效及其在食品、香料、医药中的应用。 相似文献
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Ming Miao Bo Jiang Zhengyu Jin James N. BeMiller 《Comprehensive Reviews in Food Science and Food Safety》2018,17(5):1238-1260
Starch is an abundant, natural, renewable resource, and present as the major storage carbohydrate in the seeds, roots, or tubers of many important food crops, such as maize, wheat, rice, potato, and cassava. Uses of native starches in most industrial applications are limited by their inherent properties. Hence, they are often structurally modified after isolation to enhance desirable attributes, to minimize undesirable attributes, or to create new attributes. Enzymatic, rather than chemical, approaches are used in the production of starch syrups, maltodextrins, and cyclodextrins. However, the desire for starch‐active enzymes working optimally at high temperatures and low pH conditions with superior stability and activity is still not satisfied and this stimulates interest in developing novel and improved starch‐active enzymes through a variety of strategies. This review provides current information on enzymes belonging to GH13, 57, 70, and 77 that can be used in structural modifications of the starch polysaccharides or to produce starch‐derived products from them. The characteristics and catalytic mechanisms of microbial enzymes are discussed (including 4‐α‐glucanotransferase, branching enzyme, maltogenic amylase, cyclomaltodextrinase, amylosucrase, and glucansucrase). Product diversity after starch‐converting reaction and utilization in industrial applications are also dealt with. 相似文献
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Microbial inulinases find application in enzymatic hydrolysis of inulin for production of fructose (sweetener) and inulooligosaccharides (prebiotics). Inulin is one of the most abundant nonstructural polysaccharides found widely dispersed in plants and awaits judicious utilization. Demands for an alternative healthy sweetener and multifunctional fructooligosaccharides have prompted investigators to explore microorganisms for inulinase production and to develop bioprocesses for production of high-fructose syrup and oligosaccharides based on enzymatic hydrolysis of raw inulin. Inulinases have been characterized in several molds, yeasts and a few bacteria. Recently, there has been a spurt of interest in finding novel inulinase producers, cloning and expression of inulinase gene in heterologous hosts and use of crude plant inulin and agro-industrial media in both submerged and solid state fermentation for inulinase production. The review discusses current knowledge on production, properties and applications of microbial inulinases and looks into the recent advances in the field. 相似文献
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合生元又称合生素,指益生元与益生菌结合使用的生物制剂(微生态制剂),近年来,越来越多研究表明合生元具有多种益处,益生元和益生菌的选择对其最终效果起着至关重要的作用。低聚果糖和菊粉是合生元中常见的益生元,可被肠道内的乳酸菌选择性吸收,通过促进益生菌增殖的方式来改善机体健康。本文综述了乳酸菌对低聚果糖和菊粉的代谢差异及代谢途径,并从分子水平阐述水解酶、转运系统、调控蛋白的作用机制,以期为探明乳酸菌调控低聚果糖和菊粉的代谢网络提供依据;同时总结了近年来低聚果糖/菊粉合生元的应用,为益生元与益生菌的进一步联用提供参考。 相似文献
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菊糖是一种天然碳水化合物,对人体有特殊的生理功能。主要介绍了最近几年新发现的菊糖的一些生理功能,如降低粪臭素、影响下丘脑神经元、保护脏器氧化,以及菊糖过敏症等等。本文还介绍了菊糖在食品中的一些前沿应用,如改善公猪肉质品感官品质、抗氧化性、刺激微生物生长、与食品中其他物质相互作用等等。菊糖作为一种新的食品配料,广泛的应用于食品工业中。 相似文献
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