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碳水化合物

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In this work, a series of layered silver-long chain alkylamine complex has been synthesized in the alcohol/water system for the first time, and such compound possesses the special sponge-like macroporous structure.

在本工作中,系列银-不同碳链长度的有机胺的配合物首次在醇-水体系中被合成获得,且该化合物具有特征性的海绵形貌中空结构。

The science team is trying to determine whether the water ice ever thaws enough to be available for biology and if carbon-containing chemicals and other raw materials for life are present.

这只科学团队尝试确定火星上的水冰是否曾经大量融化,从而能支持生物存在。同时,它还将寻找火星土中是否有以碳为基础的有机化合物,这些化合物是形成生命的&原材料&。

The latter is chlorinated in the side chains under free-radical conditions to give 2,4-dichloro-5-fluoro-3-dichloromethyl-1-trichloromethylbenzene. The latter is hydrolysed via 2,4-dichloro-5-fluoro-3-dichloromethylbenzoic acid, which can be isolated if necessary, to give 2,4-dichloro-5-fluoro-3-formyl-benzoic acid, the aldehyde group of which is reacted to give 2,4-dichloro-5-fluoro-3-N-hydroxyiminomethyl-benzoic acid, from which, with simultaneous conversion of the carboxyl group into the chlorocarbonyl group, water is eliminated using an acid chloride to give the nitrile 2,4-dichloro-3-cyano-5-fluoro-benzoyl chloride.

随后,在游离基条件下进行侧链的氯化,得到2,4-二氯-5-氟-3-二氯甲基-1-三氯甲基苯、后者被水解,经过2,4-二氯-5-氟-3-二氯甲基苯甲酸(如果需要此化合物可以分离),得到2,4-二氯-5-氟-3-甲酰苯甲酸,将其醛基反应,得到2,4-二氯-5-氟-3-N-羟基亚氨基甲基苯甲酸,用酰氯从其中除去水,同时将羧基转化为碳酰氯,得到一种腈,即2,4-二氯-3-氰基-5-氯-苯甲酰氯。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力