化学方法

These results indicated that the presented method could be applied efficiently to the solution-phase combinatorial chemistry based on Williamson etherification.

结果表明该方法可高效率地用于基于Williamson醚化反应的液相组合化学合成。

A better understanding of the role of PPAR in insulin action system will be critical in developing more efficacious and safe agent s that act on PPAR and benefit patients with type 2 diabetes. The main content is followed: Synthesis and analysis of 1,3-dicarbonyl compounds. Make use of easily available cheap reagent such as 2-naphthol, 6-hydroxyquinoline, 1,2-dibromoethane, 4- hydroxybenzaldehyde, dimethyl malonate, 2-{4- [(2-napthoxy)ethoxyl] benzyl} malonates and 2-{4 [(1,2,3,4-tetrahydro-6 -quinolinoxy)ethoxyl] benzyl } malonates were synthesized through 6-8 steps in virtue of Williamson, Knoevenagel reaction, Pd/C catalyzed hydrogenation with mild conditions and high yield. The total yield of 40-50%.

本论文的主要内容和研究结果如下： 1，3-二羰基类化合物的合成及分析，采用2-萘酚、6-羟基喹啉、1 ，2二溴乙烷、对羟基苯甲醛、丙二酸二甲酯等常见易得试剂，利用Williamson反应、Knoevenagel反应、钯碳加氢等条件温和且收率高的方法，分别合成了2-{4- [(2-萘氧)乙氧基]苄基}丙二酸衍生物和2-{4 [(1，2，3，4-四氢-6-喹啉氧基)乙氧基]苄基}丙二酸衍生物两个系列8个化合物，经6-8步反应，总收率为40-50%，具有一定绿色化学特性。

Sometimes this method is referred to as naturally decaffeinated because ethyl acetate is a chemical found naturally in many fruits.

有时，这种方法被称为自然咖啡因因为乙酸乙酯是一种化学物质，自然在许多水果。

In this dissertation, by applying the ideas of the mathematics mechanization, under the instruction of " AC=BD" theory of Professor Zhang Hongqing, we consider some methods seeking exact solutions to nonlinear partial differential equation arising from the fields of elasticity, fluid mechanics, aerodynamics, plasma physics, biophysics and chemical physics.

本文根据数学机械化的思想，在导师张鸿庆教授"AC=BD"理论的指导下，研究在弹性力学、流体力学、空气动力学、等离子体物理、生物物理和化学物理等现代科学技术中引出的非线性偏微分方程求精确解的方法。

The theories and applications of several chemical factor analysis methods are investigated in...

本文对化学因子分析方法的理论和应用进行了探讨和研究。

The selection of fracture splitting forceparameter mainly depends on experience and no theory can abide by.In this paper aim at the technique of fracture splitting of engine connectingrod, the materials fitting to fracture splitting have been analysed, according tosome influence factors that the former has researched. The influence that thechemistry compositions to the mechanics function and the physical function insteel have been analyzed. The theory of quasistatic fracture splitting of suitableconnecting rod for engine EA827 has been studied. Aimed at the new materialC70S6, the quasistatic procedure has been numerical simulation analyzed bySPH non-mesh method. The solved stress intensity factor module andparameterize model building module have been developed based ANSYS byAPDL.

本论文主要研究发动机连杆裂解工艺，根据已知的一些连杆裂解影响因素，对适合裂解的连杆材料进行了综合分析，分析了钢中各组成化学成分对力学性能和物理性能的影响，针对新型裂解连杆材料C70S6钢，对捷达EA827发动机配套连杆进行了准静态裂解理论分析，并且利用SPH无网格方法对此进行了数值模拟分析，利用APDL开发了基于ANSYS的求解连杆裂解应力强度因子模块和参数化建模模块。

Objective: To explore the expression of fatty acid synthase and its significance in esophageal carcinoma.

目的：研究脂肪酸合成酶在食管癌中的表达及其临床意义。疗法：通过免疫组织化学的方法对45例食管癌标本，6例不典型增生的食管粘膜和12例正常食管粘膜中的脂肪酸合成酶的表达进行检测；并与临床病理指标进行比较。

Many physical and chemical methods could be used to study the effects of soil fauna on litter decomposition in forests.

可以通过物理的或化学的方法研究土壤动物对凋落物分解的影响。

As a conclusion, FE-GC is a novel and feasible method for the quality control of traditional Chinese medicines.

这对鱼腥草化学成分整体性研究和有效成分提取方法的开发具有非常重要的意义。

In this paper, we studied ferrate chemical synthesis, electrochemical production, charge-discharge properties and the impact of additives on the electrochemical characteristics of Fe cathode .

主要研究了高铁酸盐的化学与电化学制备新方法、电化学性质以及添加剂对高铁酸盐电极性能的影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。