查询词典 deacetylate

The results showed that the chitosan had the viscosity of 2886.7 mpa · s and the deacetylate rate up to 97.17% under the optimal reaction condition: temperature 50℃, 3 h reaction period, and 50% NaOH.

结果表明，用超声波制备高黏度壳聚糖的最佳反应条件是：反应温度为50℃，反应时间为3h，NaOH溶液的浓度为50％，可以得到黏度为2886.7mpa·s、脱乙酰度达97.17％的壳聚糖。

Besides, it makes discussions on the factors that affect the deacetylate degree of chitosan, and obtains the optimal technical conditions as follows: the density of sodium hydroxide 35%, the reaction temperature 90℃, the reaction time 3 h, and the transfer catalyst dosage 5%.

讨论了影响壳聚糖脱乙酰度的因素，确定了最佳工艺条件，氢氧化钠质量分数为35%；反应温度90℃；反应时间3h；相转移催化剂质量分数为5%。

The properties and structures of these films depend on their molecular weght, degree of deacetylate, the solvent, the temperature to remove the solvent from the chitosan solution.

壳聚糖膜的结构和性能取决于壳聚糖的分子量、脱乙酰度、溶剂以及除去溶剂的方式。

The uniform design and PTC are used in the studies on preparation for the chitosan of high deacetylate degree and low viscosity.

利用相转移催化剂与均匀设计法探讨了高脱乙酰度、低粘度壳聚糖的制备方法，找出了最佳工艺条件，在最佳工艺条件下得到了粘度为 2 6.6m Pa· s，脱乙酰度为 99.4 %的壳聚糖

Methods:Use methods such as take off protein,calcium,colour,deacetylate and purification to prepare chitosan to study deacetylate degree,molecular weight and other characters of chitosan,then compare with infrared spectrum of bio-chemical chitosan on market.

用脱蛋白、除钙、脱色、脱乙酰基、纯化等方法制备壳聚糖，研究其壳聚糖的脱乙酰度、分子量等性质，并与市售生化级壳聚糖的红外光谱进行比较。

Use methods such as taking off protein,calcium,colour,deacetylate and purification to abstract and preparing chitin and chitosan from Xuyu's local lobster shell.The technology,equipments,operation are simple and have strong popularization.

用本法从地产盱眙龙虾的虾壳中提取甲壳素和制备壳聚糖工艺设备简单，操作简易，具有较强的推广性；地产盱眙龙虾的虾壳含甲壳素较高，是一种制备壳聚糖不可多得的天然资源，值得开发利用。

objective:with the local lobster shell as the raw material,we inquire into the abstraction and preparation of chitin and chitosan to develop a new raw material resources for chitosan.methods:use methods such as take off protein,calcium,colour,deacetylate and purification to prepare chitosan to study deacetylate degree,molecular weight and other characters of chitosan,then compare with infrared spectrum of bio-chemical chitosan on market.results:the chitin and chitosan obtained from lobster shell are 14.8% and 8.9%, respectively.

目的：以地产龙虾壳为原料，探讨其甲壳素的提取和壳聚糖的制备方法，以开发壳聚糖制备的新原料资源。方法：用脱蛋白、除钙、脱色、脱乙酰基、纯化等方法制备壳聚糖，研究其壳聚糖的脱乙酰度、分子量等性质，并与市售生化级壳聚糖的红外光谱进行比较。

The other technical indexes are also accordance with document.conclusion:use methods such as taking off protein,calcium,colour,deacetylate and purification to abstract and preparing chitin and chitosan from xuyu's local lobster shell.the technology,equipments,operation are simple and have strong popularization.the chitin abstracted from xuyu's local lobster shell is rather high,it's a natural resources to prepare chitosan and is worth to exploit and utilize.

用本法从地产盱眙龙虾的虾壳中提取甲壳素和制备壳聚糖工艺设备简单，操作简易，具有较强的推广性；地产盱眙龙虾的虾壳含甲壳素较高，是一种制备壳聚糖不可多得的天然资源，值得开发利用。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了