研究了在催化剂存在下低酯化度果胶与甲醇进行的甲酯化反应。
The methyl- esterification reaction of low -methoxyl pectin with methylalcohol by the presence of some catalysts was observed .
在最佳工艺条件下反应得到蔗糖多酯产率达到89.12%，酯化度6.8。
Under the optimum conditions the sucrose polyester (SPE) yield attained 89.12%, and the esterification degree reached 6.8.
该工艺合成的蔗糖多酯平均酯化度为6．5以上，产品得率达90％ 以上。
The average ester degree is 6.5 and yields are greater than 90%.
对天然松香进行强化和酯化改性，确定了再生纸浆用的松香的最佳加成量和酯化度。
This paper studies the natural rosin modification on fortified and esterified. The best fortification and degree of esterification of rosin on second fiber were discussed.
在适宜的反应条件下，对羟基苯甲酸壳聚糖酯酯化度可达130%、得率80%以上。
Under optimum reaction conditions, esterification degree of para-hydroxybenzoate chitosan ester was 130%, and yield reached 80%.
自然界大多数植物中的果胶为高甲氧基果胶，需通过降低其酯化度制备低甲氧基果胶。
The pectin in most plants is the high methoxyl pectin, so the low-methoxy pectin has to be prepared by reducing the degree of esterification.
本文用概率统计和动力学方法，推导了多元醇的丙烯酸酯酯化度分布函数及其计算公式。
By using probability statistics and dynamics, this paper derived the esterification degree distribution function and its calculation formula for polyol-acrylate reaction.
讨论了活化木薯淀粉与马来酸酐的摩尔比、反应温度、反应时间对酯化淀粉取代度的影响。
The effects of the molar ratio of activated tapioca starch to maleic anhydride, the reaction temperature and reaction time on degree of substitution of esterified starch were examined.
所得到的硫酸酯化半纤维素A产品取代度为0．36。
The substitution degree of sulfated hemicellulose A was 0.36.
我们工作中采用了溶胶-凝胶-酯化合成法，在一定的热力学重结晶条件下得到结晶度高、表面性能好的超细晶材料，它具有好的电化学和电学性能。
We take a sol-gel-esterification process to get nanometric LiMn 2 O 4 powder which has good electronic and electronic and electrochemical performances with good crystality and surface characteristics.
我们工作中采用了溶胶-凝胶-酯化合成法，在一定的热力学重结晶条件下得到结晶度高、表面性能好的超细晶材料，它具有好的电化学和电学性能。
We take a sol-gel-esterification process to get nanometric LiMn 2 O 4 powder which has good electronic and electronic and electrochemical performances with good crystality and surface characteristics.
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