化合物

We would like to make our students to know and master the basic way of the chemistry experiments, the use of the normal apparatus of inorganic and analytical chemistry, the character of the normal inorganic compounds and

课程的目标是使学生了解和掌握化学实验的基本方法和常见的无机与分析化学仪器的使用，了解和掌握一般无机化合物的性质以及分离提纯的方法；熟悉常见的无机化合物的制备方法，掌握测定有关重要化学常数的方法和原理；熟悉滴定分析的基本操作，掌握定量测定无机化合物的主要化学滴定的方法和原理，从而培养学生能用化学观点与方法来观察分析和解决实际问题的能力。

Compound Ⅰ, named opuntiaester, is a new one and compounds Ⅱ-Ⅳ are obtained from the plants of Opuntia Mill for the first time.

化合物Ⅰ为新化合物，命名为仙人掌酯，化合物Ⅱ-Ⅳ均为首次从本属植物中分离得到。

The constituents were extracted by some solvents. 18 constituents were isolated from Chloroform fraction by different chromatography. 15 constituents were identified by IR ,MS and NMR as follows: 3-sitosterol, P-sitosterylpalm itate,succinate acids, 1, 4-benzenediol, 1, 2-benzenediol, p-hydroxybenzaldehyde, syringaresinol, oleanolic acid, usolic acid, ethyl caffeate , Rosmarinic acid ethylster and etc. In such constituents ,nine compounds were isolated for first time from Origanum vulgare L..

牛至药材经水煮醇沉法所得浸膏，利用溶剂法和色谱法从中分离得到18个单体成分，通过IR、MS、NMR等波谱技术鉴定了其中的15个化合物，分别为β-谷甾醇(1)、β-胡萝卜苷(2)、琥珀酸(3)、对-二苯酚(4)、邻-二苯酚(5)、对羟基苯甲醛(6)、1.2-二羟基-4-异丙基-5-甲基苯(7)、新木脂素(8)、丁香脂素(9)、齐墩果酸(10)、乌苏酸(11)、4-二十六烯(12)、正二十六醇(13)、咖啡酸乙酯(14)、迷迭香酸乙酯(15)等，其中化合物3、4、5、6、7、8、9、14、15等9种化合物均为首次从该属植物中分离得到。

Humic acids, oxidizable fraction and lipids were the main fractions affecting the sorption capacity. The humic acids had the maximum adsorption capacity for nitrobenzene and aniline, the lipids naturally present in the soil strongly compete for hydrophobic sorption sites within the soil organic matter, and the adsorption capacity of mineral surface for nitrobenzene and aniline were only 2.31mg·kg-1 and 3.63mg·kg-1, respectively.

硝基苯和苯胺在湿地土壤中的吸附主要受腐殖酸、易氧化有机质组分和脂类化合物的影响，其中腐殖酸对硝基苯和苯胺具有最大的吸附容量；脂类化合物表现为与硝基苯、苯胺竞争土壤有机质结构中的吸附位点，去除脂类化合物后残余物的吸附量增大；矿物组分对硝基苯和苯胺的吸附是次要的，吸附容量仅为2.31mg·kg-1和3.63mg·kg-1。

NMR and ESI-MS techniques were used to study the interactions between diperoxovanadates and small organic molecules such as pyridine, imidazole, arginine, picoline ester, and picoline amide. Spectroscopic methods were established to explore this type of interactions.

在合成数种双过氧钒化合物的基础上，利用多种NMR技术结合ESI-MS等谱学方法系统研究了双过氧钒化合物和咪唑、吡啶、取代吡啶、精氨酸、皮考啉酯以及皮考啉酰胺等有机配体的相互作用，建立了一套适合研究过氧钒化合物与有机小分子相互作用的谱学方法。

The compound was new and such kind of compounds were never obtained in Portulaca oleracea L.

该化合物为未见文献报道的新化合物，也是马齿苋中首次分离获得此类化合物。

Then the contour of bandgap energy of AlGaInPAs and GaInPAsSb on different substrate materials are depicted. 2. The generalized boundary equation of miscibility gap in a Ⅲ-Ⅴ quinary and its explicit expression for two types of quinaries are derived for the first time, based on the relationship between Gibbs'free energy and the boundary of miscibility gap in a multicomponent solid solution.

首次从多元化合物的吉布斯自由能函数和互溶隙边界的内在联系出发，推导出了描述Ⅲ-Ⅴ族五元系化合物中互溶隙边界的一般方程，并结合在正规溶液近似基础上给出的五元系自由能表达式，推导出两类Ⅲ-Ⅴ族五元系化合物的互溶隙边界的显性表达式。

It has been demonstrated that the methods are successfully used for QSRR studies of quinazoline derivatives, alkypyridine, haloid alkane, ketone, alcohol, sulfur alcohol compounds.

本文成功地用该方法对喹唑啉类、烷基吡啶化合物、卤代烃、醇、羰基化合物和硫醇化合物的结构保留关系进行了探讨。

The total synthese three natural compounds to explore enantioselective synthesis of flavanol: We use phloroglucin and 2, 4, 6-trihydroxyacetophone as starting materials to synthesis distenin in two ways; Resorcin was used to synthsis 2, 5-dimethoxymethoxyacetophone though 3 steps.

对黄烷醇化合物的立体选择性全合成进行了探索：以间苯三酚和2，4，6-三羟基苯乙酮为原料，尝试用两条路线对Distenin化合物进行了全合成研究；以对苯二酚为原料，经三步制得2，5-二甲氧甲氧基苯乙酮，与2，4，6-三甲氧甲氧基苯甲醛反应，经四步反应得到天然产物3，5，7，2′，5′-二五羟基黄烷关键中间体1-（2′，6′-二甲氧甲氧基苯）-3-（2"，4"，6-三甲氧甲氧基苯）丙烷-1R，2R-二醇83及其对映体84；简要介绍了EGCg类化合物的生物活性和研究概况。

To an asymmetric synthesis of (1), we applied a type of Roush addition in the first step to introduce the C4 stereocenter, and then the chair substance -122 are readily transformed into the title compound -aphanorphine using the same route as to the racemic target molecular.

aphanorphine分子的不对称合成是在第一步通过对甲氧基苯乙醛（119）发生Roush反应引入手性，得到手性高烯丙醇-122，然后利用与合成外消旋目标分子相同的方法，光学纯化合物-122经一系列转化可得到光学纯中间体化合物139；化合物139发生分子内傅—克反应的过程中，由C4位手性立体特异地控制C1位手性的生成，从而解决-aphanorphine分子中的手性问题。

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。