物

These compounds are of substantial interest both inviewpoints of theory and practical applications, mainlyunder the stimulus to achieve synthetic models either foractive sites of iron-sulfur proteins or for transitionmetal catalysts. This thesis describes the synthesis, structures andconformations of 51 new iron-sulfur cluster complexes,which have been characterized by elemental analysis andstandard spectroscopic methods. In addition, single-crystalX-ray diffraction analyses were performed for 4 representa-tive new compounds. Reactivities of μ-〓 with mono- and di- Grig-nard reagents derived intermediates toward various organicelectrophilic substrates were studied, along with complexa-tion of arynyl-containing iron-sulfur clusters by 〓Thus, several bridged, non-bridged, monomeric, dimeric,homonuclear, heteronuclear iron-sullfur and iron-sulfur co-balt-carbon cluster complexes were synthesized. A novelreaction and convenient route for the synthesis in highyield of tetranuclear iron complexes 〓 containing atetracoordinated sulfur atom was discovered, whereas aplausible mechanism based on experimental results was propo-sed for the formation of the new cluster type.

鉴于有机铁硫原子簇化学在基础理论发展和应用方面的重要意义，因此我们开展了这一课题的研究，并取得以下主要成果： 1、本文共合成了51个新有机铁硫及含钴碳簇基的有机铁硫原子簇配合物，除用元素分析，NMR，IR，MS法表征其结构和构象外，还用X-光衍射技术测得四个代表性配合物的单晶结构和构象； 2、我们业已发现炔基Grignard试剂同〓可形成一种&开环&与&闭环&中间物的平衡混合物，研究该平衡混合物同各种亲电试剂的反应； 3、研究发现了一种可高产率地形成〓含〓四配位硫挛合簇的新化学反应并对此反应提出了—种有趣的反应机理； 4、首次由1，4-二溴丁烷双Grignard试剂与〓制得一种新型铁硫簇双硫阴离子活性中间体，并进而研究了它的亲核反应性能； 5、找到了通过〓的光化学反应来合成簇合物〓-〓的一条有实用价值的新路线。

The aim of this study was to examine the possible antioxidant and antiproliferative activities of the ethanol and water extracts of four Hydrocotyle species from Taiwan. ABTS radical monocation scavenging, FRAP method, DPPH radical scavenging, reducing power method, total polyphenol content, total The results showed that the water extracts of all the samples had higher antioxidant and antiproliferative activities than the ethanol extracts.

本实验针对台湾产四种天胡荽属植物之水萃取物及乙醇萃取物进行抗氧化及抗增生活性研究，分析方法包括ABTS自由基的清除、FRAP方法、DPPH自由基的清除、还原力、总多酚类含量、总类黄酮类含量、总黄酮醇类含量以及癌细胞增生之抑制，结果显示所有样品的水萃取物之抗氧化及抗增生活性皆大於乙醇萃取物，但在抗氧化活性方面，所有受测样品活性皆小於正对照组。

To our knowledge, reverse phase of high performance liquid chromatography was firstly developed to analyze the metabolites of 7-tocopherol with ideal results. Meanwhile, Gas chromatography/Mass chromatography were used to analyze the structures of unknown metabolites of 7-tocopherol and a main unknown metabolite was identified as a side chain ω- hydroxylate of 7-tocopherol.The kinetic results of of 7-tocopherol reacted in the S9 of male SD-rat liver showed that the optimal time was 45 min; the optimal concentration of S9 5 mg/ml; the optimal concentration of NADPH 1 mM; and the optimal concentration of 7-tocopherol 8 μg/ml. The result of γ-tocopherol metabolized in the S9 of male SD-rat was the best; male Brazil turtle better; and male cobia worst.

本试验首次确立了γ-生育酚代谢物的RP-HPLC分析方法，结果理想且重现性好；用GC／MS对γ-生育酚的未知代谢物结构进行分析，判断其中一种主要的代谢物为γ-生育酚侧链初级羟基化代谢物；γ-生育酚在雄性SD-大鼠肝S9的代谢动力学表明，本实验条件下代谢反应的最佳时间为45min，S9浓度为5mg／ml，NADPH浓度为1mM，γ-生育酚浓度为8μg／ml；发现γ-生育酚在雄性SD-大鼠肝S9中代谢最高，雄性巴西龟次之，雄性军曹鱼最低。

The result shows that the relationship of conopy density with living cover plant space expresses a negative correlation, age class expresses a positive correlation, age class expresses a positive correlation; the relationship of conopy density with the dead covering plant and general covering plant expresses a positive linear covrelation, age class expreses an indicial ...

研究结果表明，郁闭度与活地被物负荷量呈负线性相关关系，龄级与其呈正线性相关关系；故郁闭度与死地被物和总地被物负荷量呈正线性相关关系，龄级与其呈正线性相关关系；蓄积量与地被物的负荷量呈线性正相关关系，但相关性较小。

Lipase enzyme activity analysis by p-NPP method indicated that Lipase6, Lipase7 and Lipase8 had higher lipolytic activities to substrates of p-nitrophenyl palmitate (C16), p-nitrophenyl alaurate (C12) and p-nitrophenyl palmitate (C16) respectively.

底物特异性分析表明Lipase6、Lipase7和Lipase8分别对C16底物、C12底物和C16底物水解能力最强。

An evaluation of Linear, Freundlich and Langmuir equations on both accuratity and stability indicates that the Linear equation is the best. Sorption of p nitrophenol to sediment is dominated by the partition of solutes to sedimental organic matter. The influences of temperature on sorption of p nitrophenol to sediment was also investigated. The sorption parameters of thermodynamics,Δ H =-7 8?kJ·mol -1 , suggest that the sorption behavior is dominated by dispersive force.

研究了对硝基苯酚在不同沉积物上的吸附等温线，比较分析了Linear方程、Freundlich方程和Langmuir方程描述吸附等温线的准确性和稳定性结果表明，Iinear方程更适合描述沉积物吸附对硝基苯酚的等温线对硝基苯酚在沉积物上的吸附主要是溶质在沉积物有机质中的分配，其吸附热为-7 8 kJ·mol-1，主要的吸附作用力为疏水键力。

It is found that the initial pH,ρ(H_2O_2) and ρFe~(3+ of the solution have significant effects in this photooxidative process. The removal percentage of COD_ is higher under solar irradiation than under UV irradiation. Under the selected conditions, using solar/H_2O_2/ferric oxalate complexes to treat the landfill leach has good efficiency. landfill leach ; ferric oxalate ; photocatalysis

已有的研究表明，Fe3+羧酸盐络合物具有光催化降解有机物的性能[1-3]；当草酸铁络合物体系中存在一定量的H2O2时，在太阳光或紫外光照射下，可发生类Fenton反应产生羟基自由基[4]，而草酸铁络合物可在一定程度上循环利用，使Fe3+和C2O2-4可以重新形成草酸铁络合物：2[Fe(C2O4)n](3-2n)hν2Fe2++(2n-1)C2O42-+2CO2(1)Fe2++H2O2

The results show that molecules of PEO〓 have priority to locate at the interface of PVF〓/PVC to reforce their interaction when content of PEOx was less than saturated concentration in the interface , and PEOx joined into the PVF〓 phase and /or the PVC phase; the particles size of dispersed phase, PVC, became larger when C was more than Cs; the blend became miscible when C was much more than Cs.

结果表明，aPS与sPS的非晶区相容，共混物中不存在aPS的独立相区；共混物的熔点及长周期不随共混物aPS含量的变化而有所改变；sPS的纤晶结构单元没有变化，共混物结晶度下降，aPS处于sPS的纤晶之间；sPS为α-晶型，其晶胞结构参数在共混前后不变，aPS没有进入到sPS的晶胞中。

Analysis of the dynamic process of core degradation, debris relocation within the reactor vessel, molten pool formation, reactor vessel melt-through and corium relocation into the core catcher is executed with the computer codes SCDAP/RELAP and MELCOR, and the reaction among the corium, the sacrificial material, and the metal material, as well as the thermal and hydraulic characteristic of heat exchanger is experimentally studied.

在田湾核电站堆芯捕集器的设计中，综合采用了压力容器外包容装置、非能动供水冷却堆芯熔融物包容体金属表面以及用&牺牲性&材料改善熔融物特性和降低热流密度等项技术；利用SCDAP/RELAP和MELCOR两个独立的程序包分析了压力容器内堆芯的损坏、碎片的分布、熔池的形成、压力容器熔穿和熔融物转移到堆芯捕集器等的动态过程，并对堆芯熔融物、&牺牲性&材料、金属材料等之间的物理、化学反应和热交换器的热工水力特性进行了实验研究。

Evaluation of the detergency on hair, the detergency ability of methanol extracts was similar with sodium dodecyl sulfate and were better than Sapindus mukorossi water extracts.

头发评估与应用方面，比较无患子甲、乙、丙、丁醇萃取物、无患子水萃取物及Sodium dodecyl sulfate之清洁力，结果显示以甲醇萃取物之清洁力与SDS相当，且优於无患子水萃物。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。