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The equilibrium constant of the reaction is only 33.20 even at 1 000 K and the spontaneous degree of the reaction is low.

但即使在1 000 K时,反应的平衡常数也仅为33.20,这说明该反应自发进行的程度不高。

It is shown that the methanol dimer and methanol cluster are the predominant species of methanol in gaseousness. So we believe that rather the methanol dimer is the original reactant of the methanol dehydration reaction to dimethyl ether than the mono-methanol.

研究表明,在气相中,甲醇分子主要以二聚体和多聚体的形式存在,据此提出甲醇脱水反应的原始反应物是甲醇二聚体,而不是单个甲醇分子。

As the chiral source of asymmetric induction, the chiral ligands control the procedure of stereochemistry in reaction.

在手性催化反应中,手性配体是不对称诱导的手性源,控制着反应的立体化学过程。

Reaction (1) was examined with different kinds of acetal substrate(1) and vinyl ethyl ether, and the results indicated that the 1, 1,3-triethoxy compounds could be obtained in high yields of 88 and 97% respectively when the R groups of the acetal are phenyl and anisyl, while the yields amounted only to 55-75 % for R=a...

有证据表明这种催化反应也可能是通过正碳离子中间体进行的。本反应的产物1,1,3-三乙氧基化合物经乙酸/乙酸钠溶液水解可得反式α,β-不饱和醛。水解产率:芳香族产物大于90%,脂肪族产物大于75%。

These reactions increase the probability of incomplete combustion and are more likely to release uncombusted and photochemically active hydrocarbon compounds into the atmosphere.

这些反应增加了不完全燃烧得可能性并且易于放出未燃烧的,易起光化反应的碳氢化合物释放到大气中。

With these versatile catalyst systems, electronically and sterically diverse reactants can be efficiently cross-coupled, without the need for substrate-specific optimization of reaction conditions.

凭借这些&神通广大&的催化剂系统,那些电子云和空间位阻各不相同的反应物都能有效地实现交叉偶联,无需针对底物对反应条件优化。

A series of 3,3,6,6 tetramethyl 1,8 dioxo 9 aryl 1,2,3,4,5,6,7,8,9,10 decahydro acridines have been synthesized by the condensation of aromatic aldehydes, 5,5 dimethyl 1,3 cyclohexanedione and ammonium acetate in the presence of triethylbenzylammonium chloride as catalyst in water.

芳醛、5 ,5 二甲基 1,3 环己二酮与醋酸铵在三乙基苄基氯化铵催化下以水作为溶剂反应,生成一系列 3 ,3 ,6,6 四甲基 1,8 二氧代 9 芳基 1,2 ,3 ,4,5 ,6,7,8,9,10 十氢吖啶,与其它溶剂相比,水作为该反应的溶剂具有价格便宜,不易燃和无毒等优点,而且产率较高,产物的结构通过单晶X射线确

Because the kinetics of Beckmann rearrangement is very complicated and the reaction speed is very fast, the realization of its reaction kinetics is very variant.

由于贝克曼重排反应的机理非常复杂,而且该反应速率极快,因此对其机理的认识很不一致。

R Demehri and his team hypothesised that eczema-induced TSLP enters the bloodstream and, when it arrives at the lungs, sensitises them so that they react to allergens that would not previously have bothered them.

emehri博士和同事假设,湿疹引发的TSLP进入到血液,当TSLP达到肺部后,肺部对TSLP产生感应,这样一来肺部对原本不产生反应的过敏原就产生反应了。

R Demehri and his team hypothesised that eczema-induced TSLP enters the bloodstream and, when it arrives at the lungs, sensitises them so that they react to allergens that would not previously have bothered them.

emehri博士和同事假设,湿疹引发的TSLP入渗透到血液,当TSLP达到肺部后,肺部对TSLP产生感应,这样一来肺部对原本不产生反应的过敏原就产生反应了。

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Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。

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粮食产品的运输费用与5月份相比没有变化,但却比去年同期高8%。

However, to get a true quote, you will need to provide detailed personal and financial information.

然而,要让一个真正的引用,你需要提供详细的个人和财务信息。