查询词典 adducts

The energy required to form the CpTiCH〓 cation from dissociation of CpTiCH〓Cl·AlMe〓 and different kinds of chlorine-bridged and oxygen-bridged CpTiCH〓Cl·MAO model adducts accounted for the higher cocatalytic activity exhibited by MAO with respect to AlMe〓.

CpTiCH〓Cl·AlMe〓和不同氯桥或氧桥

According to the literatures and our experiments, appropriate conditions for the reaction of C60 with alkyl azide and the separation of adducts were obtained. The relationship between the structure and the chromatographic polarity of the products was also summarized.

根据文献报道和实验总结出了富勒烯与烷基叠氮化合物的反应条件和产物的分离条件，并对化合物结构与色谱极性的关系作了归纳总结。

In the ESI+ mode the compound isolated from fraction III/9 showed a pseudo-molecular ion of m/z 261 ([M + 1]+) as well as sodium and potassium adducts with m/z 283 and m/z 299, respectively, thus suggesting a molecular mass of 260 Da.

在 ESI+模式下，从子馏分 III/9中提取出来的化合物分别出现了伪分子离子 m/z 261 ([M + 1]+)和纳钾加合物 m/z 283 and m/z 299，这样就暗示了260 Da 的分子质量。

Cucurbit[6]uril adducts with metal cation and naphthylamine in the water, be a new supramolecular adducts.

在水溶液中，六元瓜环与金属阳离子及萘胺发生作用，形成一种新颖的超分子配合物。

The reaction of polyfluoroalkyl iodides with 4-pentenoic acids in the presence of sodium dithionite at room temperature in aqueous acetonitrile solution [CH〓CN: H〓O=3: 1 ] to gave the corresponding adducts, the latter could form γ-lactones 31～51 in the same medium in 62～92％ yield.

室温下，在乙腈/水[3：1]的介质中，多氟烷基碘化物在连二亚硫酸钠的存在下与4-戊烯酸及其在2或3位上具有取代基团的衍生物进行反应，反应2～5h，起先生成两者的加成物，该加成物无需分离，在同一介质中，可进一步反应得到相应的多氟烷基取代的γ-丁内酯31～51，产率62％～92％。

Polyfluoroalkyl iodides could react with unsaturated olefin acids in the presence of sodium dithionite by radical addition to give adducts. It was found that these adducts could form polyfluoroalkyl substituted γ or δ-lactones due to intramolecular nucleophilic substitution in the alkali solution.

研究发现：多氟烷基碘化物在连二亚硫酸钠存在下与不饱和烯酸经自由基加成得到的产物，能在碱性条件下进行分子内亲核取代反应形成五元或六元环的含氟内酯类化合物。

With water as urea solvent and an organic chlorine compound as activator, the adducts formed into small spheres which are easily filterable.

用尿素饱和水溶液，有机氯化物为活化剂，生成的尿素-正烷烃络合物成球状，易於过滤分离。

The adducts of ethylene oxide and propylene oxide are possessed of the majority of nonionic deinking agents. They are the adducts of fatty acid and polyol and monoethanolamine.

在非离子脱墨剂中，环氧乙烷和环氧丙烷的加聚产物占了绝大部分，分别为硬脂肪酸、高碳醇和烷酰醇胺型的加成物。

The reliable, sensitive and accurate detection and identification of DNA adducts is a key to the wide application of DNA adducts as biomarkers.

可靠、灵敏、准确的分析检测技术是DNA加合物作为生物标志物得到广泛应用的关键。

However, whether DNA adducts isassociated with COPD and which DNA adducts is associated with COPD is still notstudied.

近年来，越来越多的研究表明氧化应激在COPD发病中起重要作用。

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。