化合物

The value of current density and the apparent active energy of electroreduction of substituted nitrobenzene depend on the electronic effect of substituted group and space resistance. o,m,p-chloronitrobenzene will be electroreduced to azoxy compounds by taking three electrons, o,m-nitrotoulene and o,m-nitrobenzoic acid will be reduced to phenol compounds by taking four electrons, and p-nitrotoulene will be reduced to the aniline by taking six electrons. According to these results, the electroreduction mechanism of the substituted aryl nitro-compounds was studied in detail.

在电还原过程中，还原峰电流和表观活化能的大小均与取代基的电子效应和空间位阻相关，同时取代硝基氯苯得3个电子将还原生成氧化偶氮苯类化合物：邻、间硝基甲苯、硝基苯甲酸得4个电子将还原生成酚类化合物；对硝基甲苯得6个电子将还原生成胺类化合物，在此基础上，探讨了各芳族硝基化合物的电还原机理。

Among these investigated compounds, benzothiophene, dibenzothiophene and thianthrene are stable at the highest pyrolysis temperature and suggest that these compounds are geochemical stable compounds and this is consistent with that these compounds are widely existence in the mature petroleum and sedimentary organic matter.

在所调查的化合物中，苯并噻吩、二苯并噻吩、二苯硫和噻蒽等在最高热解温度下也不发生任何化学反应，表明这些化合物代表了稳定型结构的硫化合物，这与这些化合物广泛存在于成熟原油和沉积有机质中的状况是一致的。

Compound 1 is a new compound, the others are isolated from this genus for the first time, and this is the first time to report lignan compounds from genus Celastrus.

化合物1为新化合物，其余化合物为首次从该属植物中分离得到。本文为首次报道该属植物中的木脂素类化合物。

The preliminary bioassary showed that at the concentration of 100μg/mL, the inhibitory rate of compounds Ⅴc to Fusarium graminearum was 81.3%;Ⅳe to Fusarium oxysporium was 83.4%;Ⅴe and Ⅴf to Cercospora sorghi were 79.7% and 72.4% respectively;Ⅳd to Fusarium graminearum and Fusarium oxysporium were 68.9% and 65.7% respectively.

初步生物测试结果表明：在质量浓度为100μgmL下，化合物Ⅴc对小麦赤霉病菌的抑制率达到了81.3%；化合物Ⅳe对马铃薯干腐病菌的抑制率达到了83.4%；化合物Ⅴe，Ⅴf对玉米弯孢病菌的抑制率也分别达到了79.7%和72.4%；化合物Ⅳd对小麦赤霉病菌和马铃薯干腐病菌的抑制率分别达到了68.9%和65.7%。

Results: Sixty-one constituents were firstly isolated and identified from the fruits of 3 species of Chaenomeles. Forty compounds in Chaenomeles lagenaria, thirty-four compounds in Xuan mugua (C.lagenaria from Xuanzhou) and 23 compounds in C.sinensis were isolated and identified respectively.

结果：从3种木瓜的乙醚提取部位中首次分离与鉴定出61个化合物，其中皱皮木瓜 40个化合物，宣木瓜(C.lagenaria 产自安徽宣州) 34个化合物，光皮木瓜 23个化合物。

RESULTS:Six flavonoids 6-C-glycopyranosyl-8-C-glycopyranosyl apigenin(1),6-C-arabinosyl-8-C-glycopyranosyl apigenin(2),6-C-glycopyranosyl-8-C-arabinosyl apigenin(3),6-C-glycopyranosyl-8-C-xyloeyl apigenin(4),6-C-glycopyranosyl luteolin(5),luteolin(6),one chromone isobiflorin(7),and one lignanoid-isolariciresinol(8),were isolated from the n-BuOH fraction of this plant,respectively.

结果：从毛鸡骨草地上部分的正丁醇部位分离并鉴定了8个化合物，黄酮类化合物：芹菜素-6-C-葡萄糖-8-C-葡萄糖苷（1），芹菜素-6-C-阿拉伯糖-8-C-葡萄糖苷（2），芹菜素-6-C-葡萄糖-8-C-阿拉伯糖苷（3），芹菜素-6-C-葡萄糖-8-C-木糖苷（4），木犀草素-6-C-葡萄糖苷（5），木犀草素（6）；色原酮类化合物：异双花母草素（7）；木脂素类化合物：-异落叶松树脂醇（8）。

In order to increase the stability and hence increase the oral antiinflammatory activity, and as well as to de- crease or abolish the anticancer activity of type I com- pounds, an alkyl group was incorporated into the side chain of cyclopentanone Mannich base to generate type Ⅱ compounds.

为提高化合物的稳定性以使化合物经口给药时具有抗炎活性，同时降低或消除抗癌活性，本文将Ⅰ类化合物的Mannich碱侧链部位引入烷基而设计并合成了Ⅱ类化合物（共18个）。

Aluminum phosphate (AlPO 4) can be prepared by solid state synthesis with different templates, aluminum chloride and ammonium diacid phosphate at low temperature (180℃) within a short time (2 h).

以氯化铝和磷酸二氢铵为原料，在模板剂存在下用固相合成方法合成了磷酸铝类化合物，合成的化合物通过化学分析、ICP测定、XRD和 IR图谱对其进行了表征，研究了化合物对铬离子吸附性能，实验表明这类化合物对铬离子有较好的吸附能

Compounds 1, 2, 3, 4, 5and 6 were new compounds. Compound 9 was obtained from Chinese eaglewood for the first time.

其中化合物1，2，3，4， 5和6为新化合物，化合物9为首次从国产沉香中分离到的化合物。

The introduction of methoxyphenyl or fluorenyl endows significantly enhanced electron-accepting capability,and the LUMO energy level decreases from-3.50 eV of 1a to-...

同时，大尺寸芳香取代基的引入有效抑制了由于分子聚集而引起的荧光淬灭，使三亚吡嗪化合物的荧光量子效率从化合物1a的0.23提高到化合物1b的0.81和化合物1c的0.87。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了