1) acetylation value
乙酰基含量
1.
The acetylation value and substitution degree of these starches were determined with chemical analysis methods and IR spectrum.
用化学分析方法和红外光谱法测定了在不同 p H值下制备的一系列醋酸酯淀粉的取代度和乙酰基含量 ,获得了 p H值对淀粉酯化反应的影响规律 ,并解释了该规律 。
3) diacetyl content
双乙酰含量
1.
pressure less than 300 MPa could advance decomposition of α-acet lactate and reduction of diacetyl and effectively reduce diacetyl content,and pressure more than 300 MPa would prolong the reduction of diacetyl and increase diacetyl content;3.
②压力小于300 MPa时,促进清酒中α-乙酰乳酸的非酶分解及双乙酰的还原反应,具有降低双乙酰含量的作用;而压力大于300 MPa,会相对延缓双乙酰的还原,导致双乙酰含量的反弹。
4) vinyl content
乙烯基含量
1.
The relationships between the vinyl content and the properties as well as the network density of solution polymerized SBR (S-SBR) were studied.
研究了溶聚丁苯橡胶(S-SBR)中丁二烯单元的乙烯基含量与胶料的物理机械性能及网络密度之间的相互关系。
5) 4 vinyl pyridine content
乙烯基吡啶含量
1.
A series of poly(butyl methacrylate co (4 vinyl)pyridine)s with varied molecular weight and 4 vinyl pyridine content were synthesized using free radical copolymerization, and the gas permeation behaviors in copolymer membranes were measured using a low vacuum permeation apparatus .
结果表明 ,随着共聚物膜中乙烯基吡啶含量的增加 ,共聚物膜的密度、玻璃化转变温度及氧氮选择性都随之增加 ,但氧氮渗透率和扩散系数、溶解度系数却相应下
6) acetoacetyl
[,æsitəuə'si:til]
乙酰乙酰基
补充资料：1-氯甲酰基-3-乙酰基环亚乙基脲
分子式：C6H7ClN2O3
分子量：190.58
CAS号：41730-71-6
性质：密度1.528。熔点102-104°C。沸点278°C。闪点122°C。
分子量：190.58
CAS号：41730-71-6
性质：密度1.528。熔点102-104°C。沸点278°C。闪点122°C。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条