We used phase transfer catalyst to improve the deacetylation of Chitosan, and the hydrogen peroxide degradation to reduce the molecular of Chitosan.
本文通过使用相转移催化剂来提高壳聚糖的脱乙酰度，使用过氧化氢降解法降低壳聚糖的分子量。
The effect of N acylation on the solubility and crystallinity of chitosan and the effect of reactive time, temperature and proportion on degree of deacetylation were investigated.
研究了N-酰化反应对壳聚糖溶解性能和结晶性能的影响以及反应时间，温度，配比对脱乙酰度的影响。
This work first carries on the water content, the degree of chitin deacetylation of the merchandise chitosan.
本工作首先对商品壳聚糖进行水份含量，脱乙酰度等性能测定；
The factors which affect the deacetylation degree of chitosan and the viscosity, e. g. reaction time, base concentration and food rate are discussed.
并讨论了影响壳聚糖脱乙酰度和粘度的因素，例如，反应时间，碱浓度，料比。
The first work of this paper is measuring physical properties of chitosan. Degree of deacetylation(DD)of chitosan determined by acid base titration is about 83%.
实验首先对原料壳聚糖的物理性质进行测定：采用酸碱指示剂滴定法测定壳聚糖的脱乙酰度约为83%，应用粘度法测定其粘均分子量为十万左右。
The degree of deacetylation of chitosan prepared by the optimum condition is 88.53%, the viscosity average molecular mass is 9048. The experimental result mainly accorded the prospective desire.
最佳制备条件得到的壳聚糖脱乙酰度为88.53%，黏均分子质量为9048。实验结果基本符合预期的要求。
Effects of the degree of deacetylation (DD) on the properties of chitosan.
脱乙酰度对壳聚糖材料性能的影响。
The preparation conditions of chitosan and the chitosan with higher deacetylation degree are investigated. The preparation methods of some derivatives of chitosan are also introduced.
研究了壳聚糖的制备条件。同时对高脱乙酰度壳聚糖的制备进行了探索。探讨了一些壳聚糖衍生物的制备方法。
The chitosan was prepared with 92% deacetylation degree using n-butanol and sodium hydroxide as a reaction medium and cetyltrimethylammonium bromide as a phase transfer catalyst.
采用正丁醇-氢氧化钠反应体系，以十六烷基三甲基溴化铵为相转移催化剂，制得脱乙酰度为92%的壳聚糖。
For preparing chitosan resin of high deacetylation degree and high cross-linking degree, chitin is taken as raw material and orthogonal test is adopted to determine technological condition.
以甲壳素为原料，采用正交试验法确定制备高脱乙酰度和高交联度的壳聚糖树脂的工艺条件。
The effect of chitosan with different molecular weight and deacetylation degree on blood hemostasis was tested.
研究了不同脱乙酰度和不同分子量壳聚糖醋酸溶液的凝血作用。
Results The degree of deacetylation of chitosan was found to be about 80%.
结果壳聚糖澄清剂的脱乙酰度约80 %，在澄清液中壳聚糖残留量小于0。
High degree of deacetylation and low molecular Chitosan L-lactate which has good solubility in water has good antibacterial effects.
高脱乙酰度低分子量壳聚糖l -乳酸盐将具有良好的水溶性和抑菌效果。
The chitosan was prepared from chitin by deacetylating and the degree of deacetylation was 83%.
甲壳素通过脱乙酰化制备壳聚糖，脱乙酰度可达83%。
A dissolving precipitated method has been developed for the preparation of chitosan having a high degree of deacetylation in the presence of ethyl alcohol.
以乙醇为反应介质，采用溶解沉淀法制备了高脱乙酰壳聚糖。
In deacetylation degree, pupa shell of M. domestica and shell of Euplyphaga chitosan was relatively higher than others.
从几丁糖质量角度看，采用家蝇蛹壳和地鳖虫壳可制备脱乙酰度较高的几丁糖；
Chitosan which also is called soluble chitin is obtained by deacetylation of chitin.
壳聚糖由甲壳素经脱乙酰基而得，又称为可溶性甲壳素。
The effect of degradation conditions on the degree of deacetylation and instinct viscosity of chitosan is also studied.
采用正交设计，探讨降解条件对产物脱乙酰度、特性粘度等的影响。
Deacetylation degree has direct effect on properties of chitosan.
甲壳质脱乙酰度的高低直接影响到壳聚糖的性质。
Chitosan with excellent xanthation ability has high requirement on purity, degree of polymerization and degree of deacetylation.
具有良好黄化反应性能的壳聚糖对原料的纯度、聚合度、脱乙酞度等指标是有一定要求的。
The deacetylation degree of obtained with optimal conditions chitosan was more than 76%.
用优化条件制备的壳聚糖的脱乙酰度>76 %。
The result shows that the composite sorbent has a high adsorption rate when the mass ratio of chitosan to rectorite was 0.04 and the deacetylation degree of chitosan was 90%.
结果表明：当壳聚糖与累托石的质量比为0.04，壳聚糖脱乙酰度为90%时，制成的复合吸附剂吸附效率较高。
We also studied on the clarification effect of chitosan treatment with different deacetylation degree and molecular weight, and storage stability of clarified kiwifruit juice.
分别用具有不同脱乙酰度和相对分子质量的四种壳聚糖澄清猕猴桃果汁，研究了不同壳聚糖的澄清效果和澄清后猕猴桃清汁的贮藏稳定性。
Some chitosan samples with the different degree of deacetylation were determined by the method, the reproducibility was good.
不同脱乙酰度的样品按照所确立的条件测定均获得了重现性较好的结果。
Chitosan is material from deacetylation of chitin, which from arthropod, coelenterate, annelids, protozoans, part of algae and fungi.
壳聚糖是来源于节肢、肠腔、环节、原生动物及海藻和真菌类的甲壳素类物质脱去乙酰基的产物。
Chitosan raw material with low degree of deacetylation d.
甲壳质脱乙酰度的高低直接影响到壳聚糖的性质。
The degree of deacetylation of chitosan was determined directly by 1st derivative UV spectrophotometry using hydrochloric acid as solvent and N acetyl D glucosamine (ACGLSM) as standard.
以盐酸为溶剂，N乙酰基D葡萄糖胺为标准品，用紫外一阶导数光度法直接测定壳聚糖的脱乙酰度。
The degree of deacetylation has a great effect on the physiochemical and bioactive properties of chitosan.
壳聚糖的脱乙酰度直接影响壳聚糖的物理化学和生物特性。
The degree of deacetylation has a great effect on the physiochemical and bioactive properties of chitosan.
壳聚糖的脱乙酰度直接影响壳聚糖的物理化学和生物特性。
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