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It was found that this polymeric arsine palladium(0) complex is a highly active and stereoselective catalyst for arylation of styrene or acrylic acid.

通过用水合肼对上述聚硅氧烷负载的单齿钯配合物进行还原制备了聚硅氧烷负载的单齿钯(0)配合物,研究表明它是苯乙烯、丙烯酸芳基化反应的高活性和高立体选择性的催化剂。

Active oxygen is found to be involved in apoptotic progress affected by exogenous SOD and measurement of SOD in cell sap. Arsenic compounds cause a decrease of SOD in cell. It is exactly the decrease that make plenty of active oxygen gather in mitochondria, and starts the apoptotic progress. The analysis of SOD values shows that active oxygen has an effect on apoptosis.

通过加入外源性SOD和对胞液SOD的测量,发现化物引起细胞凋亡的过程,有活性氧的参与,并且化物还导致细胞内SOD值的减少,正是由于这种降低,才导致了细胞内特别是线粒体中活性氧大量聚集,启动了细胞凋亡过程,通过对SOD值的分析,证明了活性氧在细胞凋亡中的作用。

The capacity of tolyl arsonic acids for collecting cassiterite has been investigated.

本文介绍了用混合甲苯酸浮选锡石的研究工作,试验表明混合甲苯酸对锡石的捕收能力优于对位和邻位甲苯酸。

With the same zirconium concentration,the absorbance of zirconyl oxyhalide solution (λ=664nm)prepared in HCl was larger than that from pure zirconyl oxyhalide solution.

发现对于相同锆浓度的溶液,高酸度的锆贮备溶液中的锆与偶氮Ⅲ形成的化合物的吸光度(λ=664nm)要大干仅由氧氯化锆配制的锆贮备溶液中的锆与偶氮Ⅲ形成的化合物的吸光度。

The environmental impact during production, usage and residual period of arsanilic acid was assessed in viewpoint of life cycle.

本文介绍了最常用的有机制剂-对氨基苯酸的主要用途和污染特征,从生命周期的角度识别并定量评价了其生产、使用和残留过程的环境影响,评价结果表明对氨基苯酸在土壤中最终残留的环境影响占其整个生命周期的99%以上,指出了常规环境影响评价在评价其环境污染上的局限性,据此提出逐步减少或禁止有机肺制剂的生产和使用、并在一些特殊的建设项目环境影响评价中推广生命周期评价的建议。

This paper proposes a method for the determination of 4-hydroxy-3-nitro-benzenearsonic acid and arsanilic acid in the nitration reaction product of arsanilic acid by ion-pair chromatography.

本文提出一种用于测定对氨基苯酸硝化反应产物中4-羟基-3-硝基苯酸及对氨基苯酸含量的离子对色谱法,选择甲醇:水=25:75作为流动相,0。

A high performance liquid chromatography method with UV detection has been established for simultaneous determination of four kinds of organic arsenic in pig feeds,including arsanilic acid,roxarsone,nitarsone and...

建立高效液相色谱法对猪饲料中4种有机类药物[对氨基苯酸、3-硝基-4-羟基苯酸、4-硝基硝苯酸、对脲基苯酸]的残留进行了检测。

Bifluoro nitrobenzene was the raw material of synthesis of asymmetry chromotropic acid bisazo fluoroarsen reagent, By way of ammonia substitution, arsonation, reduction and coupled reactions, bisazo fluoroarsen was synthesized.

以2,4—二氟硝基苯为起始原料,经过氨取代、酸化、还原、偶联反应合成了偶氮氟Ⅰ,然后分别选择不同的取代苯胺与偶氮氟Ⅰ偶联,合成了一系列的不对称变色酸偶氮氟

And thus, either one of the two geometrical isomers can be obtainedat will in high yield with high stercoselectivity,Two different stereoselectivities are displayed in thereactions of arsonium and telluronium benzylides with α,β-unsaturated esters and amides.

发现了苄基、碲叶立德在与α,β-不饱和酯、酰胺的环丙烷化反应中表现出不同的立体选择性,肉桂基、碲叶立德与α,β-不饱和酯反应时亦是如此。

Carbonyl arsonium ylides, which reacted with almost equimolarphenylselanyl iodide, were conversed into α-phenylseleno arsonium ylides in thepresence of triethylamine, affording a new method for the synthesis of α-phenylseleno arsonium ylides.

在弱碱三乙胺存在下半时,稳定的α-羰基叶立德和几乎等摩尔量的苯硒基碘作用,转化成α-苯硒基叶立德。提供了一个合成α-苯硒基叶立德的新方法。

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推荐网络例句

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克,果实色泽鲜艳,汁多味浓,甜酸适口,离核仁甜,清末时就驰名陕、甘两省,清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异:红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感,ED90值分别为47.65、71.67和29.17g/hm2;春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感,ED90值分别为96.91、114.20g/hm2;而番茄不敏感。

However, I have an idea.

不过,我有个主意。