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The mechanism of thiocarbonyl compounds with thiourea function group has been proposed according to the photoreaction products.5. Total of one heterocyclothione intermidate and four heterocyclothione compounds have been synthesized and structurally characterized.

根据所得到的产物对具有硫脲基团的硫羰基化合物的光反应机理进行合理的推测。5、合成与表征了1个环硫酮中间体和4个杂环硫酮类化合物，摸索出合成杂环硫酮中间体较佳反应条件。

Since the element sulfur has lower electro-negativity than oxygen and the C=S double bond is easier to be polarized than C=O double bond, thiocarbonyl compounds and carbonyl compounds have different reaction properties, and their photochemical reaction mechanisms often possess dramatic difference.

但是，由于硫元素较低的电负性和C=S双键较高的可极化性，硫代羰基化合物和羰基化合物有着本质不同的反应特性，光化学反应机理常常存在着戏剧性的差别。

So the difficult sequence of cracking to remove the sulfur for different sulfur compounds is that thiophene, benzothiophene＞alkyl side-chains of thiophenic compounds＞mercaptan, sulfur ether.

总之，不同含硫化合物裂化脱硫的难度顺序为：噻吩、苯并噻吩＞烷基噻吩＞硫醇、硫醚。

Toop's model and Miedema method are to be used to calculate the heat of formation of ternary compounds. A projected method is used to obtained the heat of formation of AB_(1-x)G_x. The heat of formation is negative for GaAs_(1-x)P_x and for GaAs_(1-x)N_x compounds in the all range and for GaP_(1-x)gN_x compound in the

我们分别用Pauling和Phillips经验方法及Miedema半经验方法计算[59]得到Ⅲ-Ⅴ族二元合金的生成热，比较三种方法，均只定性与实验结果吻合，但Miedema方法具有准第一原理特点，可以从组元基本特性出发来得到合金生成热的数据；我们把TOOP'S模型引入计算中，并把计算结果投影到Ⅲ族组元总浓度等于所有Ⅴ族组元总浓度的平面上，即计算AB_(1-x)C_x合金系的

Of particular interest are toxic or biologically disruptive impacts of anthropogenic chemicals such as pharmaceuticals, industrial organics, agricultural chemicals, and by-products such as chlorinated compounds from water disinfection and waste incineration; natural toxins and their impacts biotransformation and metabolism of toxigenic compounds, food chains for toxin accumulation or biodegradation; assays of toxicity, endocrine disruption, mutagenicity, carcinogenicity, ecosystem impact and health hazard; environmental and public health risk assessment, environmental guidelines, environmental policy for toxicants.

期刊注重于以下一些研究领域的研究：人为化合物的毒性和生物裂解效果；毒素生成物的生物转化和代谢；自然毒素和它们的效果；毒素生物降解和聚集的食物链；毒理实验；内分泌紊乱；环境和公众健康的评估；环境指导方针和毒素的环境政策等。

In chapter 3, 83 volatile chemical constituents have been identified from the petroleum ether extracted part of ethanol extract of Debregeasia longifolia Wedd., and the relative percentages of the compounds are determined by GC method. From the extract of trichloromethane and ethyl acetate, 8 compounds have been isolated.

第三章首次对长叶水麻乙醇提取物的石油醚萃取部分分离并鉴定出83种成分，并用毛细管气相色谱面积归一化法测定了各组分的相对百分含量；从氯仿和乙酸乙酯萃取部分分离得到了8种化合物，用波谱学方法鉴定了其中2种成分。

Three organochlorine pesticides -endrin, dieldrin, and p,p'-DDT-were used as target compounds to test the hypothesis that triolein embedded cellulose acetate membrane only extracts freely dissolved hydrophobic organic compounds. The effect of dissolved organic carbon on the bioavailability of the OCPs was also examined through accumulation study with TECAM and Japanese medaka.

以异狄氏剂、狄氏剂和p，p'-滴滴涕3种持久性有机氯农药为研究对象，通过室内模拟实验，验证了三油酸甘油脂-醋酸纤维素复合膜富集水中自由溶解态疏水性有机物的假设，研究了水中溶解性有机碳对TECAM富集3种有机氯农药的影响，并与相同暴露条件下日本青鳉鱼的富集结果进行了比较。

The problem of fluorescence quenching of the studied compounds by ctDNA was also been investigated. The results indicate that the compound with tripedal has a stronger interaction with ctDNA than that of other compounds for which one or two pedals were contained.

工作还研究了ctDNA对该类化合物荧光的猝灭问题，提出具有三足多胺结构的该类化合物比其他两种化合物-双足及单足多胺化合物有着更强的与DNA相互作用的能力。

With two tripodal ligands, dtma and tmpa, dtma=diethylenetriamine-N'-acetate and tmpa=tris(2-pyridyl-methylamine and a polyamine ligand, trien (=triethylenetetramine), serving as terminal ligands, we synthesized 19 species of new imidazolate -bridged Cu-Zn, Zn-Zn and Cu-Cu, and other relating compounds, in which 〓 and 〓 complexes are model compounds of Cu, Zn-SOD.

用不等臂三脚架dtma(diethylenetriamine-N'-acetate)、直链trien和等臂三脚架tmpatris(2-pyridyl-methyl-amine为配体，合成了一系列咪唑桥联Cu-Zn、Zn-Zn和Cu-Cu等有关19个新化合物，其中两个异双核〓Cu〓和〓〓配合物为Cu，Zn-SOD活性中心的模型化合物。2。

From its roots, we gained 9 compounds including triterpenes, steroidal glycoside, and fatty acid, a triterpene and a of them are new compounds.

分别对肥牛树的根、茎、叶三个部分的乙醇提取物进行了提取分离工作，从其根中分离鉴定了9个化合物，包括三萜、甾醇苷、酚性化合物、螺环化合物和脂肪酸等，其中有两个新化合物，即一个三萜和一个螺环化合物。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新