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Ten novel derivatives of 1-phenyl-5-[5-(substituted anilinocarbonylmethylthio)-4-phenyl-1,2,4- triazol-3-ylmethylthio]-tetrazole were synthesized rapidly in high yields by the reaction of N--2-chloryacetanilide (3) with 1-phenyl-5-(5-mercapto-4-phenyl-1,2,4-triazol-3-ylmethylthio)-tetrazo- le (2) under microwave irradiation and phase transfer catalysis conditions.

采用微波和相转移催化法通过1-苯基-5-(4-苯基-1,2,4-三唑-5-巯基-3-甲硫基)四唑(2)与2-氯乙酰芳胺(3)反应高效、快速地合成了10种尚未见文献报道的1-苯基-5-[5--4-苯基-1,2,4-三唑-3-甲硫基]四唑。其结构经IR,1HNMR,13CNMR和元素分析表征。生物活性实验结果表明,该类化合物在较低浓度下部分化合物对小麦芽有很好的促进作用

The invention relates to a pipeline polyurea outer anticorrosive coating and the making method thereof, making heated prepolymerization reaction on dibenzo-methane diisocyanate, carbodiimide diisocyanate, polyether binary alcohol and polyether trihydric alcohol to prepare prepolymer solution A, and making end amino polyethylene oxide ether, dimethyl sulfur-based toluene diamine, diethyl diamine, iso-propyl titanate solution, polyacrylate, carbon black, titanium dioxide and lightweight calcium carbonate into solution B, and as using, respectively heating the solutions A and B to 65 deg.C and then mixing them, then quickly spraying and curing to form a coat.

本发明涉及一种管道用聚脲外防腐涂料及制造方法,由二苯基甲烷二异氰酸酯、碳化二亚胺化二异氰酸酯、聚醚二元醇和聚醚三元醇通过加热预聚反应制成预聚物的A液、由端氨基聚氧化乙烯醚、二甲硫基甲苯二胺、二乙基甲苯二胺、钛酸异丙酯溶液、聚丙烯酸酯溶液、碳黑、钛白粉和轻质碳酸钙配制而成的B液组成,使用时将A液和B液分别加热至65℃后混合,然后快速喷涂固化形成涂层。

Compared with the result of the soild model, it is found that the two results have great coherence. So it is feasible to take the shell model for numerical analysis of trussed combination arch bridge.

论文最后建立了清水大桥板壳有限元模型并利用该模型对该桥的恒载作用工况进行了数值分析,通过与实体模型的结果对比发现,两种模型的计算结果具有比较好的一致性,因此可以利用板壳模型对预应力桁式组合拱桥进行快速、准确的数值分析。

There is obvious difference between groundwater and surface water ,and the effluents in winter and in spring also differ greatly. This study shows that SOS / umu test, as an important and useful method for drinking water safety evaluation, can be used for evaluating the removal efficiency of the genotoxicity quickly and accurately.

通过研究表明,本研究所应用的生物毒性测试SOS/Umu能够快速、准确地对水厂工艺过程中致突变物质的处理效果进行评价,能对工艺改进提出指导,是自来水质安全性评价的重要补充手段。

By following the "self-assisted molecular editing" protocol first established in our labs,a number of Aphos ligands were efficiently prepared from a single starting material and they were screened for catalytic efficacy, leading to the discovery of the best-performing Aphos appended with a 3-nitrophenyl group at the C4 position.Combination of this Aphos with Pd_2 offers a precatalyst for successful cross-coupling of unactivated aryl chlorides with aryl boronic acids at room temperature.The reactions took place under mild basic conditions to produce the products in high yields.

通过我们首次提出的&自助分子剪裁&的概念从单一起始物快速合成和筛选了一系列膦配体,并发现C4位含3-硝基苯基的的膦配体和醋酸钯联用可以在室温下顺利地催化不活泼氯代芳烃和芳基硼酸的偶联反应,反应条件温和且产物收率很高。

Main results are listed as below: 1. In rapid solidification, when the cooling rate is over some critical value, the solidification system will become unstable in the sense of the nonequilibrium thermodynamics, a uncontinuous steady state jump phenomenon will occur, and this uncontinuous steady state jump can be understood as the glass transition.

主要得到了如下结果:(1)通过对快速凝固过程的动力学及热力学的分析,提出了非晶转变的分枝理论模型,结果表明,对一合金熔体,当冷却速度大于某一临界值时,凝固体系会出现非平衡热力学意义上的失稳而出现多定态分枝现象,这一多定态现象可以被理解为非晶转变。

This paper brings forward a approach for textile flaw automatic detection based on optimal Gabor filters. At first the niche genetic algorithm is employed to attain the parameters of the optimal Gabor filters and segmentation threshold based on the feature of the unflawed textile,and then apply the optimal Gabor filter and threshold on the fabric image to achieve the resnlts.

为了对织物缺陷进行快速准确的自动检测,建立了一种基于Gabor滤波器的织物缺陷自动检测方法,即首先根据无缺陷织物的结构特征,应用小生境遗传算法寻找最优的Gabor滤波器参数和分割阈值;然后将待检图像通过滤波和分割来得到检测结果,同时根据响应矩阵的极小值点来计算缺陷的形状特征。

In order to achieve frequent patterns effectively and rapidly,skip the approach of reconstructing pattern tree through common path ,and make the most of level structure and depth-first search,thus directly mine frequent patterns from the unmined original semi-structured data.

为了有效快速地得到频繁模式,通过公共路径舍弃中间重新构造模式树的步骤,充分利用层次结构和深度优先遍历,提出了直接从待挖掘原始半结构化数据中挖掘频繁模式的算法。

To reduce the influence of an unsynchronized sample sequence on FFT and to improve the precision of harmonics in electric power system, this paper improves the algorithm by using windows and interpolation methods.

为了减小非同步采样对快速傅立叶变换的影响,提高电力系统中的谐波分析精度,文中通过加窗和插值对原算法进行了改进。

For special upslope,it should be estimated via traffic capacity analysis to decide whether installing climbing lane or not,based on prospect traffic flow forecast update.

随着经济的快速发展,部分公路的交通量增长已超出设计时的预测值,对于其中的特定上坡路段,应以远景设计年限交通量预测更新值为基础,通过分析其通行能力从而判断是否需要设置爬坡车道。

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推荐网络例句

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊!不用提了。提到肉,真是糟透了。

Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.

Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。