查询词典 pointed complex

A novel method for determination of benzoyl peroxide with spectrophotometry was developed. Inclusion ratio of β cyclodextrin to dibenzoy peroxide and benzoic acid is obtained with spectrophotometry.The mechanism of the inclusion was studied,too. The results showed that β-CD react with dibenzoyl peroxide to form a 1:1 or 2:1 host-guest complex, with the apparent formation constants of 5.0× 10~2and 2.5× 10~4 , respectively.β-CD reacts with benzoic acid to form a 1:1 host-guest complex with the apparent formation constant of 6.9 × 10~2 after the dibenzoyl peroxide was reduced by hydroxyl ammonium chloride.

建立了用β环糊精测定过氧化苯甲酰的分光光度法，并测定了β环糊精与过氧化苯甲酰和苯甲酸的包结比，随着β-CD浓度的增大，可与BPO分别形成1：1或2：1的包容络合物，包结常数分别为5.0×10~2和2.5×10~4，与苯甲酸形成1：1的包容络合物，包结常数为6.9×10~2；由于包结物的吸光度值比过氧化苯甲酰的吸光度值大大增加，建立了一种当β-CD存在下，在水溶液中测定过氧化苯甲酰的方法。

In addition, complex 14 was also characterized by HNMR, X-ray diffraction of complex 15 and 16 indicated they were dimeric in solid state.

结构测定显示它们在固态时也为二聚体。

The polymerization reacts from the inverse emulsion . Selecting white oil as continuous medium , Span60 and TX-10 as the complex emulsifier , AM-01﹑(NH4)2S2O4 and NaHSO3 as new-type complex initiator , the copolymerization of dimethylamino ethyl acrylate methyl chloride/acrylamide was developed . The effects of the concentration of monomer﹑emulsifier and initiator﹑ temperature﹑reaction time and pH on the molecular weight﹑intrinsic viscostity﹑conversion ratio and cation degree of copolymer were studied .

以反相乳液为初始聚合体系，油酸失水山梨醇酯Span60和辛基酚聚氧乙烯醚TX-10构成复配乳化剂，白油为连续介质，AM-01、过硫酸铵和亚硫酸氢钠组成新型复合引发体系，进行丙烯酰胺/（2-甲基丙烯酰氧乙基）三甲基氯化铵的反相准微乳液共聚合，研究了单体浓度、乳化剂、反应温度、反应时间、pH等因素对聚合产品分子量、特性粘数、转化率及阳离子度的影响。

Part II:The electrocatalytic oxidation of guanine, adenine, guanosine-5'-monophosphate and ssDNA was performed in the presence of iron bis(2,2':6',2"-terpyridine) and Fe tris(1,10-phenanthroline) complexes as a homogeneous catalysts with Fe redox couple. The electrocatalytic and electroanalytic properties of guanine with an iron bis(2,2':6',2"-terpyridine) complex was measured by the amperometry method using the rotating disk electrodes. Electropolymerization of iron tris(5-amino-1,10-phenanthroline) complex produced thin polymer films on a gold, platinum, nickel, and glassy carbon electrode.

第二部分利用iron bis(2，2'：6'，2&-terpyridine)和Fetris(1，10-phenanthroline)之金属错合物当作均相的催化剂对於鸟嘌呤、腺嘌呤、5'-鸟嘌呤核苷单磷酸盐(guanosine-5'-monophosphate)和单股DNA进行电催化氧化的研究。iron bis(2，2'：6'，2&-terpyridine)之金属错合物对於鸟嘌呤的电催化和电分析性质可利用计时安培法并使用旋转环-碟电极进行测量。rontris(5-amino-1，10-phenanthroline)之金属错合物可经由电聚合过程所形成的聚合薄膜固定在黄金、白金、镍和玻璃碳电极上。

All the complex series based on 4',4''-dicarboxy-1,6-diphenoxyhex- ane (C6-2COOH) and 4',4''-dicarboxy-1,10-diphenoxydecane (C10-2COOH) possessed higher melting and clearing points, usually showed soft crystal or crystalline smectic phases and crystal polymorphs except C10-2COOH/ p -PhBPy complex displaying also an enantiotropic nematic phase, while the complexes based on 4,4'-dicarboxy-α,ω-diphenoxy tetraethyleneglycol ether (C8O4-2COOH) with a longer flexible spacer exhibited monotropic fluidic smectic SmA and/or nematic phases.

研究表明，分别具有较短的6或10个亚甲基的烷烃间隔基的双苯甲酸衍生物4'，4''-二羧酸-1，6-二酚氧基己烷(C6-2COOH)和4'，4''-二羧酸-1，10-二酚氧基癸烷(C10-2COOH)的系列复合物具有较高的熔点和清亮点，一般都只出现结晶近晶相和多晶型转变现象。

In Comlex model group the endangium plaque were widespread, while in that of High cholesterol group there was only single small plaque. The pathological heart changes of both High cholesterol group and Complex model group weren't obvious, with mild oedema and small fat drops. The liver cells of High cholesterol group showed mild oedema, while fat drops in the liver of Complex model group were more typical.

病理显示主动脉弓变化明显，复合模型组内膜斑块弥漫，而单纯高脂组内膜只出现单个小斑块，单纯高脂组和复合模型组心脏病变区别不大，均见轻度水肿和小脂肪滴；单纯模型组肝脏细胞轻度水肿，而复合模型组肝脏脂肪滴明显。

The results show that this reaction proceeds in two step: 1 silylene and formaldehyde form an intermediate complex, which is a kind of exothermal reaction with no barrier; 2 the intermediate complex isomerizes to sive the product. The barrier for the second step is 51.4kJ·mol^-^1 at MP2/6-31G^*//6-31G^* level (with zero-point energies correction). In view of dynamics and thermodynamics, it is between 300～400K that the reaction will have not only larger spontaneous tendency and equilibrium constant but also quicker reaction rate.

结果表明，此反应历程由两步组成：1硅烯与甲醛生成一中间配合物，是一无势垒的放热反应，2中间配合物异构化为产物，此步势垒经零点能校正后只有51.4kJ·mol^-^1(MP2/6-31G^*//6-31G^*)；从热力学和动力学的综合角度考虑，该反应在300～400K温度下进行为宜，如此，反应既有较大的自发趋势和平衡常数，又具有较快的反应速率。

Based on international and national risk management theory and application results as well as characteristics of complex systems, hierarchical holographic modeling, monte carlo simulation, fuzzy comprehensive evaluation, surrogate worth trade-off method and multiobjective risk impact analysis are exploringly and methodologically introduced into risk management research of complex systems for exploring the extent and depth of theory and application about this field, and increasing their possibilities.

本文基于国内外风险管理理论和应用研究的已有成果，针对复杂系统管理的特点，从方法论的角度，将等级全息建模法、蒙特卡罗仿真模拟、模糊综合评价法、替代值多目标权衡分析以及多目标风险影响分析法探索式地引入到复杂系统的风险管理研究中，为拓展该领域理论和应用的广度及深度增强了更具实现的可能性，为跨学科的系统风险管理实践提供了有力的支撑。

This thesis deeply researches the J2EE security strategy on the application tier of enterprise system. The security strategy predigests the information security model and meets the security requirements expediently. But there are some disadvantages when the security requirements become more complex. The expositive security on the Web-Tier can not offer more information for authentication; there is no authentication for EJB-Tier to use, make the EJB-Tier depend on the Web-Tier; J2EE uses database or application server to manage the role information. Use database to manage the role information will increase the complex of enterprise application, and the way of application server will reduce the ability of migrate other J2EE platform. To solve these problems, the thesis designs an improved security strategy model.

本文从企业级系统应用层安全的角度出发，深入研究J2EE多层体系结构的安全策略模型。J2EE提供的安全策略简化了系统的信息安全模型，能够很方便地满足基于J2EE的分布式应用系统的安全需求，但是在面对更加复杂的安全需求时，J2EE安全策略在验证授权和角色管理中还存在不足之处：其在Web层的声明式验证机制无法为用户提供更多验证信息，可扩展性较差；在EJB层缺少业务逻辑层可供采用的验证机制，而是借助于Web层的验证机制，其耦合程度较高有悖于业务逻辑分离于表现逻辑的原则；在角色管理方面，J2EE采用数据库或者应用服务器来管理角色信息，其中，数据库管理角色的方式增加了应用开发的复杂度，应用服务器管理角色降低了系统的可移植性，两者都具有片面性。

Complex terrain is a fargoing fuzzy conception which is hard to undertake general analysis. Singular terrain is presented to focus the study on geometrical character of complex terrain.

复杂地形是一个模糊的概念，涵盖的范围很广，很难进行统一的分析，即使是定性分析也无法进行，更不用说定量分析。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。