共查询到19条相似文献,搜索用时 93 毫秒
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甲壳素、壳聚糖是地球上最为丰富的天然高分子化合物,世界年产量可达100万t。主要存在于菌类细胞、昆虫和甲壳动物的硬壳里。在干的虾和蟹壳里,含量20%左右。国内由于淡水及海水虾蟹养殖的发展,仅加工副产品虾头壳就有1万t,一部分用于饲料添加剂,小部分用于提取甲壳素,有些由于未能及时加工而腐败废弃,造成资源浪费又不利于环境保护。生产甲壳素、壳聚糖除用上述虾、蟹等动物外壳 相似文献
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鉴于几丁质及脱乙酰几丁质生产中出现的一些弊端,提出了降低生产成本、提高收率及产品质量的改良方法。 相似文献
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甲壳素、壳聚糖及其衍生物的研究和应用 总被引:5,自引:0,他引:5
甲壳素、壳聚糖及其衍生物是一种天然高分子产品,随着对其研究的深入发展,涉及的内容和应用范围也越来越广泛。从甲壳素、壳聚糖发展历史、性质、应用及发展趋势等几方面对其进行简要综述。 相似文献
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甲壳素及壳聚糖最新研究进展 总被引:10,自引:0,他引:10
综合我国近十年有关甲壳素及壳聚糖的研究文献,概述了甲壳素及壳聚糖的制备与加工方法,基本性能与应用现状,同时提出了我国目前在甲壳素及壳聚糖的研究与应用中存在的问题及今后的发展方向。 相似文献
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改性甲壳素和壳聚糖在食品中的应用 总被引:3,自引:0,他引:3
本文介绍了甲壳素和壳聚糖及其有关化学改性方法,阐述了水溶性甲壳素和壳聚糖衍生物的制备方法及其在食品工业中作食品添加剂的应用。 相似文献
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综述了甲壳素/壳聚糖在医药材料和药用辅料方面较新的应用研究,包括作为药用载体、缓释制剂辅料;甲壳素/壳聚糖具有治愈伤口、抑制肿瘤生长、抗血栓性、止血、降低胆甾醇和抑制高血压的作用. 相似文献
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国内从丝状真菌中提取甲壳素/壳聚糖研究状况 总被引:10,自引:0,他引:10
作为一种资源丰富、用途广泛的天然高分子化合物--甲壳素/壳聚糖产品的开发研究引起了越来越多的研究机构的重视,用生物发酵法,以黑曲霉、雅致毛霉、米根霉、蓝色犁头霉等丝状真菌为原料来提取甲壳素/壳聚糖的研究近几年来作为一种新的路线被提出,本文对该领域的研究进行了分析和展望。 相似文献
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《国际聚合物材料杂志》2012,61(4):286-291
Chitin from squid pen (Loligo sp.) and kiddi shrimp shell (Parapenaeopsis stylifera) were treated at room temperature (30 ± 2°C) with four different concentrations of sodium hydroxide: 20, 30, 40, and 50% w/w. With 50% sodium hydroxide solution, within 108 h, the chitin from squid pen was deacetylated to give chitosan. But it required 126 h at 40% and 144 h at 30% concentration of sodium hydroxide. In the case of chitin from Parapenaeopsis stylifera, complete deacetylation took place after 120 h and 168 h at 50 and 40% concentrations of sodium hydroxide, respectively. But shrimp shell on treatment with 20 and 30% sodium hydroxide solutions and squid pen kept at 20% sodium hydroxide were not sufficiently deacetylated even after 480 h. Properties like degree of deacetylation, viscosity and molecular weight of the prepared chitosan samples were studied. Minimum alkali concentration required for the formation of chitosan at room temperature was found to be 30% for squid chitin and 40% for shrimp chitin. With the increase in the time of deacetylation, decreases in molecular weight and viscosity were observed in chitosan from both sources. Maximum viscosity was recorded by chitosan prepared from squid pen using 30% sodium hydroxide solution at room temperature. 相似文献