新型中孔多金属氧酸盐复合材料光催化降解染料罗丹明B的研究

以胺修饰的中孔氧化硅为载体，通过自组装技术制备了一取代keggin结构的K5［Ni（H2O）PW11O39］(以下简称PW11Ni)复合材料，并研究了该复合材料对可溶性染料罗丹明B(简称RB)光催化的活性。实验结果表明。该复合材料光催化RB的活性高于RB的直接光解和PW11Ni均相光催化。其中，复合材料PW11Ni—APS—SiO2可在180min内使RB的转化率达到91．6％。具有一定的开发价值。     

Emergent Property in Macromolecular Motion

In this paper, the model of inverse cascade fractal super-blocks along one direction (in the positive or negative) in the 3-dimensional space is developed to describe the self-similar motion in macromolecular system. Microscopically the cohesive and dispersed states of the motion blocks are co- existent states with vastly different probability of occurrence. Experimental results and theoretical analysis show that the microscopic cohesive state energy and dispersed state energy of each motion block are respectively equal to the macroscopic glassy state energy kTg and molten state energy kTm of the system. This singularity unveils topologically the non-integrability, mathematically the anholonomy, and macroscopically the emergent property. This singularity also reveals that the glass, viscoelastic and melt states are three distinct emergent properties of macromolecular motion from a macroscopic viewpoint. The fractal concept of excluded volume is introduced to depict the random motion at various scales in     

Computer Data Processing of the Hydrogen Peroxide Decomposition Reaction

Two methods of computer data processing, linear fitting and nonlinear fitting, are applied to compute the rate constant for hydrogen peroxide decomposition reaction. The results indicate that not only the new methods work with no necessity to measure the final oxygen volume, but also the fitting errors decrease evidently.     

Ratio K: a New Way of Metering and Evaluating the Risk and Return of Stock Investment

Although widely used, both the Markowitz model and VAR (Value at Risk) model have some limitations in evaluating the risk and return of stock investment. By the analysis of the conceptions of risk and return, together with the three hypotheses of technological analysis, a novelty model of metering and evaluating the risk and return of stock investment is established. The major indicator of this model , risk-return ratio K, combines the characteristic indicators of risk and return. Regardless of the form of the risk-return probability density functions, this indicator K can always reflect the risk-return performances of the invested stocks clearly and accurately. How to use the model to make optimum investment and how to make portfolio combined with clustering analysis is also explained.     

Time-division phase modulated single-photon interference in a Sagnac interferometer

We introduce a stable, long-distance singlephoton Sagnac interferometer, which has a balanced configuration to efficiently compensate phase drift caused by change of the fiber-optic path. By using time-division phase modulation, single-photon interference was realized at 1550nm in a 5-km-long as well as 27-km-long Sagnac fiber loops,with a fringe visibility higher than 90% and long-term stability. The stable performance of the single-photon interference indicated that the time-division phase-modulated Sagnac interferometer might readily lead to practical applications in single-photon routing and quantum cryptography.     

Inhibitory effect of the adenovirus type 5 E1A protein expressed in the yeast system of the human tumor cell growth

Adenovirus 5 type E1A as a tumor suppressor gene can inhibit tumor growth and enhance the censitivity of chemotherapy and radiotherapy.E1A have the ability to integrate into the host genome,resulting in long-time expres-sion that induces Rb gene inactivation and animal cells im-mortalization.This prompted us to select the E1A protein for treatment of cancer in order to overcome the limitations of E1A gene therapy.Thus,we firstly comstructed E1A eu-caryotic expression vector (pPIC9/E1A),transformated the pichia pastoris yeast cells(GS115) and screened the high-expressing recombinant strains.The positive yeast strains were cultured in the shake flask,and induced for 3d.The crude E1A protein was purified using two steps of col-umu chromatography on HiTrap Q and HiTrap SP.The pu-rified E1A protein was identified by SDS-PAGE and Western blot.E1A protein was mostly located at cellular unclear when Cheriot delivered E1A protein into cells.The analysis in vitro indicated that the E1A protein arrested LN686 cell cycle at G2/M phase,and significantly inhibited the growth of LN686 tumor cells.The current studies firstly provided an experimental basis to further develop E1A protein for tumor treatment.     

西藏近现代新闻传播事业考评

西藏近现代新闻传播事业(公元1907年《西藏白话报》～1951年《新闻简讯》、《草原新闻》创办)的研究向为学界所疏忽。本试图以历史的视野，从对报刊、广播两方面极为有限的献资料的梳理入手，确立西藏近现代新闻事业的基本框架，较为真实地认识和整体地把握西藏的新闻传播事业发展状况。     

单晶硅中离子注入及快速热退火后浓度分布模型

在考虑B，P，As离子注入单晶硅中的浓度分布模型的基础上，讨论了快速热退火对3种注入离子浓度分布的影响，提出了3种离子在快速热退火后浓度分布的修正模型，由修正后的模型得到的多次离子注入模拟结果与实验结果符合很好。     

利用攀钢钛矿渣生产混凝土空心砌块的试验研究

运用正交试验的方法对利用攀钢钛矿渣生产混凝土空心砌块进行了研究。研究结果表明：钛矿渣取代砂、石和部分水泥后，可以生产出性能满足GB8239-1997《普通混凝土小型空心砌块》要求的混凝土空心砌块。所开发的砌块强度达到MU10等级，确定了生产混凝土空心砌块的最佳配方。