分别考察了反应时间、反应温度等对取代度的影响。
The influences of reaction temperature and time, the amount of sulfuric acid and water on the degree of substitution were investigated.
水凝胶中壳聚糖的降解速率随取代度的升高而降低。
Degradation rate (Dr) of chitosan in the hydrogels decreased with increase of SD.
取代度对羟丙基淀粉溶液的表观粘度有较明显的影响；
The effect of high substitution on the apparent viscosity was obvious, but PH value is not.
本文以木薯氧化淀粉为原料，合成了不同取代度（D。
Using the cassava oxidized starch has been synthesized carbamoylethyl starch(CES)with different degrees of substitution( D.
研究了超声辅助作用对淀粉颗粒形貌和产品取代度的影响。
The effect of assistance of ultrasonic wave on granule appearance of corn starch and the substitution degree were investigated.
研究了高取代度羟乙基纤维素（H-HEC）的精制工艺。
The refining process of high-substitution hydroxyethyl cellulose (H-HEC) was researched.
通过试验确定了制备不同取代度甲基淀粉的工艺路线和参数。
Through experiments, finds processing route and parameters of preparing different ds methyl starch.
本文改进了用于测定羧甲基壳聚糖羧甲基取代度的灰分分析法。
In the paper, an ashing method was improved to characterize the degree of carboxymethyl substitution of carboxymethyl chitosan.
在此条件下可以快速获得较高取代度和粘度的羧甲基马铃薯淀粉。
Under these conditions, it is possible to quickly obtain carboxymethyl potato starch with higher degree of substitution and viscosity.
研究了高取代度羟丙基玉米淀粉溶液的流变学性质及其影响因素。
Rheological properties of hydroxypropylated corn starch with high molar substitution and its affecting factors were studied.
同时，取代度的高低可影响N -琥珀酰壳聚糖的溶解性和凝胶性。
It was also found that the degree of N-succinylation had effect on both the solubility and gelation of N-succinyl-chitosan.
糊黏度则先减后增。取代度的变化对沉降性和抗霉菌能力影响不大。
The effects of degree substitution on retrogradation and anti-mycotic were less.
研究了具有不同支链、取代度和胶凝温度的琼脂糖衍生物的流变行为。
The rheological behaviors of agarose derivatives with different branching chains, degree of substitute and gelling temperature were studied.
将半干法制备的高取代度阳离子淀粉应用于废纸脱墨浆作助留助滤剂。
The cationic starch with high substituted degree prepared by half-dry process was used as retention and drainage AIDS in deinked pulp.
研究了水的用量，醚化温度，溶剂的量对CMS的粘度和取代度的影响。
Study the dosage of the water temperature, etherification, solvent quantity of CMS viscosity and substitution degree.
取代度为0.030时对纯棉纱上浆性能优越，对涤棉纱上浆性能可行。
When substitution degree is 0.030, sizing property of cotton yarn is better and it is feasible for sizing polyester cotton yarn.
在所确定的最佳反应条件下，能制备取代度为1．10的羧甲基淀粉醚。
With the determined parameters of synthesis, we can obtain CMS with high degree of substitution of 1.10 in one step carboxymethylation process.
采用干法工艺制备了不同取代度的羧甲基淀粉，测试了其浆液、浆膜性能。
A series of CMS with different substitution degree are synthesized by dry preparation, and size paste and films are also tested.
制备了取代度为0.04的阳离子玉米淀粉，然后用不同量的三氯氧磷交联。
Cationic corn starch at DS 0 04 was prepared, then cross-linked using various amounts of phosphorus oxychloride.
考察了碱用量、反应温度、反应时间、丙烯酰胺浓度对反应效率和取代度的影响。
The effects of sodium hydroxide, reaction temperature, reaction time, acrylamide concentration on the reaction efficiency and degree of substitution were studied.
以水乙醇混合溶剂作分散剂，采用半干法合成工艺，制备了高取代度阳离子淀粉。
The cation starch with high substitute degree was prepared based on the half dry technology, and the dispersing agent was the mixture of water and alcohol.
以取代度为目标，用正交实验方法确定了最佳工艺条件，制得较高取代度cmc。
The best technical conditions were determined to obtain higher substitution CMC by the orthogonal experiment.
用石油醚作为分散剂，干法制备低取代度阳离子淀粉，反应效率更高，产品更均一。
The low degree of substitution cationic starch was synthesized in dry process by using petroleum ether as dispersant. The reaction efficiency was more effective and the product was more homogeneous.
考察了碱催化剂BZ1、水含量、反应温度和反应时间对取代度和反应效率的影响。
The effects of alkaline catalyst BZ 1, reaction temperature, reaction time, amount of water on reaction efficiency were studied and discussed briefly.
目的：研究不同取代度的羟丙基壳聚糖膜的生物相容性及其取代度对生物降解性的影响。
ObjectiveTo investigate the biocompatibility of hydroxypropylated chitosan film with diverse degrees of substitution and the influences of its degrees of substitution to biodegradability.
通过正交实验，研究了氢氧化钠用量、反应温度和反应时间对取代度和反应效率的影响。
The effects of reaction temperature, reaction time and amount of NaOH on the degrees of substitution of products were discussed by orthogonal test.
通过正交实验，研究了氢氧化钠用量、反应温度和反应时间对取代度和反应效率的影响。
The effects of reaction temperature, reaction time and amount of NaOH on the degrees of substitution of products were discussed by orthogonal test.
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