甘油快原子轰击质谱的量子化学研究

用标准MNDO方法优化了甘油快原子轰击正离子谱中的主要离子构型,计算了生成热、质子化能以及亚稳断裂的活化势垒,研究了质子化甘油二步脱水反应的机理,并指出脱水产物C_3H_5O~+离子存在2种不同的构型。

Reviews on The Immunological Function of Tetraspanins

Tetraspanins belongs to the transmembrane 4 superfamily(TM4SF). They can be as a bridge to connect the proteins outside or inside the cell membrane. A tetraspanins web is formed by the tetraspnins-proteins complex, and the web is believed to involve in fundamental functions of immunity system, and consequnently, signaling between cells and inside cells, regulating cell activation and adhesion, participating in the identification and infection of some virus. As a family of conservative transmembrane proteins, tetraspanins play multiplex roles in invertebrate. It was described how tetraspanin microdomains might have functions in the immune system, and how they contact with virus. In addition, the important role of tetraspanins in the innate immune system of invertebrate were discussed.

胶州湾李村河口区沉积物有机碳、酸可挥发硫化物及重金属的环境响应

本论文以胶州湾李村河口区为研究对象，通过4个沉积柱样的分析测试，对港湾内河口区沉积物中的有机质（TOC）、酸可挥发硫化物(AVS)及重金属的环境响应进行了系统的探讨，发现由于湾内河流流量较小、水动力较弱，且港湾有机生产力较强，只有紧贴河口的细粒（泥质粉砂）区域的有机质才受陆源控制，有机碳含量较高（JZB-2柱平均为1.87%），TOC、AVS与多数重金属（Cd、Cr、Cu、Fe、Pb、Sr、Zn等）呈正相关性，且重金属含量高，反映了在高重金属污染的情况下，有机质对重金属的吸附呈无选择性。而离河口稍远处，沉积物粒度较粗（粉砂），有机碳含量相对较低（JZB-4柱平均为1.02%），C/N大（>>20），C与N的相关性不强，受海、陆双源控制，重金属含量相对较低，TOC仅与Cd、Cu、Sr的活性部分呈正相关，N与Cd、Cr、Pb、Zn的活性部分呈正相关，说明部分重金属组分受陆源有机碳控制，而AVS与Fe、Hg、Zn的SEM部分呈正相关，表明在S的循环中，一些类Fe重金属往往参与其中。并分析了李村河口区的粒度变化特征，并根据有机质、酸可挥发硫化物及重金属的分布规律将河口区三角洲划分为三个区域、五种相带，总结了不同的沉积模式下其不同的环境响应，从而为海陆交互相地区的沉积物早期成岩作用与环境响应研究提供指导与参考。而且在研究的过程中还发现了目前国际通用的沉积物有机碳测定方法中存在着很大的人为误差，并通过系统实验改正了沉积物有机碳的测定方法。

利用不育技术防治高原鼠兔的理论模型

高原鼠兔数量的激增加剧了高寒草甸的退化,采取化学灭杀的方法控制高原鼠兔,只能暂时降低高原鼠兔的数量,在较短的时间内种群又会恢复到原来的水平.本文从理论上探讨不育控制对高原鼠兔种群的影响,建立了具有性别结构的高原鼠兔种群的数学模型,探讨在不育控制中两性的不育率对种群动态的影响并比较不育控制与化学灭杀的区别.结果表明:不育控制比化学灭杀在抑制和消灭种群上都具有更好的效果;在不育控制中雌性的不育率具有更为重要的作用,所以在利用不育技术控制高原鼠兔时要特别注意雌性不育率.

CE determination of 2-(9-carbazole)ethyl chloroformate-labeled oligopeptides

A pre-column derivatization method for sensitive determination of oligopeptides, using the tagging reagent 2-(9-carbazole)ethyl chloroformate (CEOC-Cl) followed by capillary electrophoresis (CE) with diode-array detection, has been developed. Maximum yield close to 100% were observed when a three to fourfold molar excess of reagent was used at pH 9.0-10.0. Excess reagent was extracted with n-hexane-ethyl acetate 9:1-10:1 (v/v); this enabled direct analysis using CE with no significant disturbance from the major fluorescent reagent degradation by-products. The effects on the results of buffer pH and of SDS and organic modifier concentrations were examined. Good baseline resolution in the separation of five CEOC-peptides was achieved with a 48.5-cm total length (effective length 40 cm) 50-mu m inner diameter capillary column.

降雨条件下碎石土滑坡稳定性研究

Debris Landslide is one of the types of landslides with the widest distribution, largest quantity, and the closest relationship with engineering construction. It is also one of the most important types of landslides that can cause disaster. This kind of landslide often occurs in the loose slopes which are made up of loose congeries formed by earth filling, residual soil, slope wash, dilapidation, landslide or full weathered material of hard rock. Rainfall is always the chief inducing factor of debris Landslide. Therefore, to research stability of debris Landslide during rainfall not only has important theoretical significance for understanding developing law and deformation and failure mechanism of debris landslide, but also has important practical significance for investigating, appraising, forecasting, preventing and controlling debris landslides. This thesis systematically summarized the relationships between rainfall and landslide, the method to survey water table in the landslides, the deformation and failure mechanism of debris landslide, and the progress in the stability analysis of landslides based on the analyses of data collected widely at home and abroad. The problems in the study of the stability of debris landslide during rainfall was reviewed and discussed. Due to the complicated geological conditions and the random rainfall conditions, the research on the landslides' stability must be based on engineering geological qualitative analysis. Through the collection of the data about the Panxi region and the Three Gorges Reservoir region, the author systematically summarized the engineering geological conditions, hydro-geological condition, distribution characteristics of stress field in the slope, physical and mechanical properties and hydro-mechanical properties of debris. In the viewpoint of dynamics of soil water and hydromechanics, physical process of rainfall to supply groundwater of debris landslides can be divided into two phases, i.e. non-saturated steady infiltrating phase and saturated unsteady supplying phase. The former can be described by mathematical model of surface water infiltration while the latter can be described by equivalent continuous medium model of groundwater seepage. With regard to specific hydrological geology system, we can obtain the dynamic variation law of water content, water table, landslide stability of rock and soil mass, along with quantity and duration of rainfall after the boundary condition on hydrological geology has been ascertained. This is a new way to study the response law of groundwater in the landslides during rainfall. After wet face of rock and soil mass connects with ground water table, the raising of water table will occur due to the supply of rainfall. Then interaction between ground water and rock and soil mass will occur, such as the action of physics, water, chemistry and mechanics, which caused the decrease of shearing strength of sliding zone. According to the action of groundwater on rock and soil mass, a concise mechanical model of debris landslide’s deformation was established during rainfall. The static equilibrium condition of landslide mass system was achieved according to the concise mechanical model, and then the typical deformation and failure process and failure mode of debris landslide during rainfall were discussed. In this thesis, the former limiting equilibrium slice method was modified and improved based on shearing strength theory of , a stability analysis program of debris landslide was established and developed taking account of the saturated-unsaturated seepage, by introducing the shearing strength theory of unsaturated soil mass made by (1978). The program has reasonable data storage and simple interface and is easy to operate, and can be perfectly used to carry out sensitivity analysis of influencing factors of landslides' stability, integrated with the program of Office Excel. The design of drainage engineering are always bases on empirical methods and is short of effective quantitative analysis and appraise, therefore, the conception of critical water table of debris landslide was put forward. For debris landslides with different kinds of slide face in the engineering practice, a program to search the critical water table of debris landslide was developed based on native groundwater table. And groundwater table in the slope should be declined below the critical water table in the drainage works, so the program can be directly used to guide drainage works in the debris landslide. Taking the slope deformation body in the back of former factory building of Muli Shawan hydroelectric power station as an example, a systematic and detailed research on debris landslides' stability during rainfall was researched systematically, the relationship among quantity of rainfall, water table and stability of slope was established, the debris landslides' stability in process of rainfall from dynamic viewpoint was analyzed and researched.