查询词典 configuration

Cephalotaxine ester of 2-oxo-6-methylheptanoic acid was treated with lithium diisopropylamide and Me O-(1-methoxyisopropyl)glycolate to give a mixture of homoisoharringtonine and its stereoisomers with 56% yield. The four stereoisomers separated by TLC showed identical mass spectra and almost superimposed IR but with different 1H NMR spectra. The configuration of the 2'-C and 3'-C of the four isomers were postulated based upon their 1H NMR spectra as compared with the 1H NMR spectra of isoharringtonine and its stereoisomers.

2-氧代-6-甲基庚酰基三尖杉碱(3)与0-(1-甲氧基异丙基)羟基乙酸甲酯(4)在强碱性试剂二异丙胺锂存在下，起亲核加成反应，反应中间体5在室温用酸性丙酮水解，得到一种新的三尖杉酯类生物碱一一高异三尖杉酯碱(6c)及其立体异构体(6a、6b、6d)的混合物，产率56%、通过制备薄层层析分得这四个立体异构体，它们的1H NMR和异三尖杉酯碱及其立体异构体的1H NMR类似，推定了它们的绝对构型。

The bacterium can better adapt to environment and the glycolipid was a high efficient surfactant, if the molecule configuration of this surfactant was ascertained and its yield was further improved, it has a great hope to be used as detergent or be used in microorganism enhanced oil recovery field, etc.

该菌株环境适应能力强，产生的糖脂表面活性剂高效，但需要对其分子组成进行进一步的鉴定并提高其产量，将有希望被用做清洗剂及应用于三次采油等领域。

Cellulose differs from starch, however, in the configuration of the glycoside linkage.

尽管如此，纤维素的糖苷键的构型与淀粉不同。

Regardless of what any user does"including erasing files, installing software, downloading viruses, or deliberately tampering with desktop settings"workstations will go back to their desired configuration upon restart.

无论什麼样的任何用户does "，其中包括删除文件，安装软件，下载病毒，或故意篡改桌面settings "工作站将返回他们想要的配置后，重新启动。

Objective To explore a technique that keep good configuration and function after reduction mammoplasty, and without little complications.

目的 探讨进一步减少巨乳缩小整形手术后并发症，术后乳房形态功能俱佳的手术方法。

This configuration is very similar to the gooseneck, but the inlet to the gooseneck is oriented in the same direction as the valve outlet.

这种结构同鹅颈管很相似，但鹅颈管的入口与阀门排气口的方向一致。

This configuration is ver y similar to the gooseneck, but the inlet to the gooseneck is oriented in the same direction as the valve outlet.

这种结构同鹅颈管很相似，但鹅颈管的入口与阀门排气口的方向一致。

No matter they are dust pan,half graben and complex types, they have distinct general characters in section configuration and the distribution of sediments.

无论是箕状式、地堑式，还是它们之间的组合———混合式，在剖面形态、沉积分布均具有明显的共性。

The optimization for the configuration of first-order planar high-Tc dc-SQUID gradiometer which is widely used in unshielded environment is also involved in this thesis.

对于在无屏蔽环境下普遍采用的高温超导 dc-SQUID 一阶平面式磁场梯度计进行了图形结构的优化设计。

The gramicidin A-DMPC channel model was built with the new efficient approach for constructing the initial configuration.

用最近提出的构建膜体系初始构象的有效方法，构建了在DMPC脂膜环境下短杆菌肽A通道模型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。