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- 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%25,在澄清液中壳聚糖残留量小于0。
- 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。
- A rapid method for determining the degree of deacetylation of chitosan using near-infrared spectroscopy is proposed,which calibrating by CP/MAS NMR. 用固态CP/MAS NMR对壳聚糖的脱乙酰度进行测定,建立快速测定壳聚糖的脱乙酰度的近红外方法。
- Chitosan is an important biomedical material, and its degree of deacetylation is a main parameter of its biodegradation. 壳聚糖是一种重要的生物医用材料,脱乙酰度是影响其生物降解性能的重要因素。
- Alkalimetry is standard method of determining degree of deacetylation of chitosan generally applied in aquaculture and other industry. 摘要碱量法是水产行业测定壳聚糖脱乙酰度的标准方法,应用广泛。
- The result showed that, immersion under pressurized condition could prepare chitosan with a higher degree of deacetylation and higher molecular weight. 结果表明,压力浸渍法可得到更高脱乙酰度和更高分子量的壳聚糖产品。
- The result showed that,immersion under pressurized condition could prepare chitosan with a higher degree of deacetylation and hi. 壳聚糖是甲壳素部分脱乙酰化的产物,脱乙酰度的大小对壳聚糖的性能影响很大。
- The effect of concentration, molecular weight, and degree of deacetylation of chitosan on the antibacterial activity to Escherichia coli and the Hay bacilluswas investigated. 研究不同浓度、分子量和脱乙酰度的壳聚糖对大肠杆菌和枯草杆菌抗菌性能的影响。
- Object To study the degree of deacetylation of chitosan and its residual amount left over in the clarified products when chitosan was used as a clarificant. 目的对壳聚糖澄清剂的脱乙酰度及精制后的中药水提液中壳聚糖的残留量进行了探讨。
- 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。
- The effect of concentration,molecular weight,and degree of deacetylation of chitosan on the antibacterial activity to Escherichia coli and the Hay bacillus was investigated. 研究不同浓度、分子量和脱乙酰度的壳聚糖对大肠杆菌和枯草杆菌抗菌性能的影响。
- 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。
- The chitosan with degree of deacetylation of 92.84%, and with weight of 7.84105 dalton is used as carrier for enzyme immobilization. The optimum conditions of immobilization are pH6.0 and 3% glutaradehyde. Recovery of enzyme activity is 59%. 固定化最佳条件;以脱乙酰度为92.;8%25;平均分子量为7
- Results showed that the purity of such chitosan is 95%,the degree of deacetylation is 92%,and the viscosity average molecular weight is 85000.The AMC has remarkable anti-aging effects. 结果得到的AMC,含量为95%25,脱乙酰度92%25,粘均分子量为85000,其具有显著的抗衰老作用。
- On the other hand, influences of chitosan solution concentration, viscosity, degree of deacetylation and measuring temperature on the result of equivalence point of two abrupt change conductometric titration were also investigated. 通过比较双突跃电位滴定法和线性电位滴定法,对脱乙酰度的测定方法进行了讨论,探讨了壳聚糖溶液浓度、粘度、不同脱乙酰度和测定温度等因素对双突跃电位滴定法滴定终点测定结果的影响。
- The determination of the degree of deacetylation of chitosan by linear potentiometric titration was studied, and the determined values were compared with the values determined by acid-base titration. 采用线性电位滴定法测定壳聚糖的脱乙酰度,并与酸碱指示剂滴定法测定的结果进行比较,结果表明线性电位滴定法测定比较适合粘度高的样品,且分析速度快,操作简单,精密度高。
- In this paper, a new technics of preparing nonderived, low degree of deacetylation, water-soluble chitin and an assay to define the molecular weight and degree of deacetylation have been investigated. 本论文研究了制备非衍生化、低脱乙酰度、水溶性甲壳素的新工艺,并探讨了水溶性甲壳素脱乙酰度及分子量的测定方法。
- She shows a high degree of skill in her work. 她在工作中表现出高度的技巧。
- The moisture-absorption and moisture-retention capacity of chitosans with different degree of deacetylation and different molecular weight and N-carboxybutyl-chitosan were studied. 透明质酸具有良好的吸湿、保湿性能,被认为是“理想的天然保湿因子”。
- A private car gives a much greater degree of comfort and mobility. 私人小汽车能给人很大的舒服和机动性。
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