查询词典 DI

The method which used di-tert-butyl dicarbonate has good application prospects because of the less by-product and simple treatment, And the use of some new technologies such as microwave will play a role in promoting the preparation of isothiocyanates.

而一些如微波等新技术的应用对异硫氰酸酷的制备将会起到很好的推动作用。

Three metal ion bridged self-assembled films of cis -di-bis(2,2'-bipyridyl-4,4'-dicarboxylate) ruthenium were fabricated and characterized by contact angle, UV spectra, cyclic voltammetry and XPS. Their photoinduced electron transfer properties were examined.

本文通过三种金属离子桥联的方式制备了一系列cis-RuL22 （L代表4，4'二羧基-2，2'联吡啶）自组装膜，并利用接触角，UV光谱，循环伏安法以及XPS对自组装功能膜进行了表征。

Three series of segmented polyurethanes were synthesized, which are based on 4,4'-methylene-di, N-methyl diethanolamine and hydroxy terminated poly-butadiene, poly or poly.

本文讨论了以聚环氧乙烷、聚环氧丙烷以及聚丁二烯为软段，以4，4'-二异氰酸二苯甲烷和N，N-二羟乙基甲胺为硬段的链段型聚氨酯的合成。

The catalyst used diethyl 2,3—di—i—propylsuccinate as internal donor particles were also synthesized.

采用 2，3-二异丙基琥珀酸二乙酯为内给电子体合成了负载型聚丙烯催化剂。

Methods Glutaric dialdehyde was prepared from benzimidazolium salt and saturated dihalide by the addition-hydrolysis reaction of benzimidazolium salt with Di-Grignard reagent.

方法以苯并咪唑盐和二卤代烷为原料，利用苯并咪唑盐与双Grignard试剂的加成水解反应合成戊二醛。

Chapter 1: The reactions of methylenecyclopropanes with phenylsulfenyl chloride or phenylselenyl chloride give cyclobutene derivatives along with ring-opened products in good total yields at 0 °C in various solvents. The reactions of methylenecyclopropanes with diphenyl diselenide give the di-phenylselenyl substituted ring-opening products which can be transformed to 2,5-dihydrofuran derivatives under the oxidation with hydrogen peroxide at room temperature.

在第一章中，我们发现亚甲基环丙烷类化合物在0℃时即可很快与苯硫氯或苯硒氯发生反应生成取代环丁烯类化合物和正常的开环产物；而与二苯基二硒的反应则需加热到150℃以上才能进行反应，生成的二苯硒基开环产物在双氧水氧化下可以转化为取代二氢呋喃类化合物。

Quello che distingue il cervello umano da quello di un computer è la componente "non-logica".

与众不同之处是什么人脑从一个计算机部分是&非逻辑&。

The sodium dithiobenzoic acid was oxidized with potassium ferricyanide to obtain di disulfide.The influences of raw materials mole ratio,stirring method and reaction time on the yield were studied with orthogonal test.

用铁氰化钾溶液氧化二硫代苯甲酸钠，得双二硫代苯甲酰，采用正交实验探讨了4，4'-偶氮双(4-氰基戊酸)与双二硫代苯甲酰反应的投料比、搅拌方式、反应时间对反应收率的影响。

In 1996 graduated as 'Dottore di Ricerca' in Veterinary Internal Medicine.

1990年毕业于博洛尼亚大学兽医学院。

Ducato di Milán, A.D. 1080 Summer

米兰共和国，公元 1080 夏

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。