查询词典 straight chain

If the straight-chain alkoxy group is too long, it's crystalline enhances, therefore thepolymer's solubility declines.

取代基长度进一步增加时，直链烷基自身的结晶性提高而柔顺性下降，聚合物可溶性反而有所降低。

The invention concerns a process for preparing heterocyclic carbenes of general formula in which R1, R2, R3 and R4 are identical or different and mean saturated or unsaturated, straight-chain, branched or cyclic, unsubstituted or substituted C1-C10 alkyl, C2-C5 alkylidene, C2-C5 alkylidine, C7-C19 aralkyl or C6-C14 alkyl groups, R3 and R4 can also stand for hydrogen or form jointly anellated, substituted or unsubstituted groups with between 3 and 7 carbon atoms and X stands for carbon or nitrogen, R3 being dropped if X is nitrogen.

本发明涉及一种制备通式Ⅰ的杂环碳烯的方法，其中在通式Ⅰ中，R1、R2、R3和R4是相同的或不同的，并且是饱和的或不饱和的，直链、支链或环状的，未取代或取代的C1－C10－烷基、C2－C5－亚烷基、C2－C5－次烷基、C7－C19－芳烷基或C6－C14－芳基基团，R3和R4可以是氢或它们一起形成具有3－7个碳原子的稠合的、取代或未取代的基团，X是碳或氮，并且当X是氮时，不存在R3。

Animal and plant waxes are esters of fatty acids and either a sterol or a straight-chain higher alcohol (e.g., cetyl alcohol).

动物蜡和植物蜡属脂肪酸的酯类，这些醇类可以是一组称为固醇的醇类，或者是一种在直链中的醇。

Animal and plant wax es are esters of fatty acids and either a sterol or a straight-chain higher alcohol (e.g., cetyl alcohol).

动物蜡和植物蜡属脂肪酸的酯类，这些醇类可以是一组称为固醇的醇类，或者是一种在直链中的醇。

The bisubistituted straight-chain and tetrasubstituted ester molecules have symmetrical structures.

二元直链和四元硝酸酯具有对称的分子构型。

Separation of straight-chain α-olefins and paraffins from coker gas oil by urea dewaxing was tested in a laboratory.

对尿素脱蜡工艺从焦化柴油中分离直链α-烯烃和直链烷烃的工艺路线进行了试验研究，用异丙醇和水混合溶剂溶解尿素，与焦化柴油进行络合反应。

When D-glucose is written in an open or vertical, straight-chain fashion, known as an acyclic structure to organic chemists, with the aldehyde group (position 1 ) at the top and the primary hydroxyl group (position 6 ) at the bottom

当D一葡萄糖被写成开环纵向直链的形式，既有机化学中的无环结构，醛基在顶部(1位)，主要的羟基在底部(6位)。

The straight chain line will provide efficient pedaling, and the lack of components mean less mechanical problems and a lighter bike.

直链的生产线将提供高效的踏板，缺乏部件意味著减少机械故障和一个打火机自行车。

The straight chain line will provide efficient pedaling, and the lack of components mean less mechanical problems and a lighter bike.

直链线将提供高效脚踏，和部件缺乏意味着减少机械故障，一个打火机自行车。

A catalyst carrier was designed and synthesized under a new concept. After carrying a precious metal, a new generation of catalysts was obtained. This catalyst can convert straight chain alkanes to isomerized alkanes effectively.

采用新概念设计并合成出催化剂载体，担载贵金属后获得新一代催化剂，该催化剂可在低压条件下，高效率地把直链烷烃转化为异构烷烃。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。