...应或间接与醋酸衍生物反应得到的一种淀粉衍生物,其中淀粉葡萄糖单元上羟基氢原子被取代的程度称为取代度(Degree of Substitution,DS)。高取代乙酰化淀粉耐水、耐油,并且具有一定的热塑性。
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吉盖克斯同样不喜欢电脑游戏。他认为电脑图形取代了艺术家为游戏玩家所创造的想象空间，降低了游戏的体验度。
Mr Gygax didn't like that either; he thought computer graphics cheapened the experience by substituting an artist's imagination for the player's.
本文以马铃薯淀粉为原料，环氧丙烷为醚化剂，氢氧化钠为催化剂对低取代度羟丙基淀粉的制备工艺进行了研究。
Synthesis technology and property of hydroxypropyl starch by using potato starch as raw material, propylene oxide as etherization reagent and sodium hydroxide as catalyst, were studied in this paper.
以硫酸基取代度和糖的质量分数为指标，采用L9(34)正交试验对反应温度、试剂配比和反应时间进行优选。
L9 (34) Orthogonal test was used to optimize the reaction temperature, reagent formula, and reaction time with the degree of sulfate group and carbohydrate content as index.
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