乙烯

In chapter four molecular modeling method is employed to comparatively study five S-allyl γ-hydroxy ketene dithioacetals reactions of Thio-Claisen rearrangement with and without zeolite catalysts.

第四章用分子模拟途径研究了在有、无分子筛催化条件下五种丙烯基羟基乙烯酮二硫代乙缩醛Thio-Claisen重排反应。

Keywords ketene;isopropenyl acetate;esterification;strong acidic cation-exchange resin;fine chemical intermediates

乙烯酮；乙酸异丙烯酯；酯化反应；强酸性离子交换树脂；精细化工中间体

Due to the potential lability of vinyl triflates, the availability of mild reaction conditions can be critical for efficient coupling of sensitive substrates.

鉴于乙烯基三氟甲磺酸酯潜在的不稳定性，保证反应条件温和对于敏感底物进行有效的交叉偶联反应而言，是至关重要的。

Edge measuring unit for fabric, plastic, paper or vinyl rolls, it is also suitable for ribbon, lace and paper tape measuring.

边缘测量单位织物，塑料，纸张或乙烯基卷，它也适用于带，花边和纸带测量。

Eating linoleum, or any kind of plastic or vinyl, can cause blockages in a guinea pig that may be life-threatening.

吃了亚麻，或任何类型的塑料或乙烯，都可能会造成阻塞，可能危及豚鼠的生命。

Unlike vinyl or linoleum laminate floors are not attached to the sub floor.

不像乙烯基或油毡胶膜楼层不隶属的分楼。

Changes in postharvest respiration and physiological effects of Chinese olive Canarium album Lour.

研究了橄榄果实采后呼吸变化和外源乙烯处理对橄榄果实的生理效应。

This result implicated that LOX had commence to the initiation of fruit softening and was positively regulated by ethylene.

研究同时发现，LOX在这两种果实软化的启动阶段都起了明显的促进作用，其活性受乙烯利和1-MCP的调节。

And then, a series of meaningful conclusions are gained that F4 is the most closely Lambert Body but lubricous aluminum plate is resembled as mirror.

得到了聚四氟乙烯最接近朗伯体，而光滑铝板接近镜面的一系列有意义的结论。

Methods NIH mice were given TCE injection subcutaneously. Organ coefficients of thymus, spleen and liver were measured in addition to plantar swelling test and lymphopoiesis test.

给予NIH小鼠皮下三氯乙烯染毒后研究胸腺、脾、肝脏等脏器系数变化情况、进行足跖肿胀实验、脾细胞转化实验等。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。