大学物理实验数据的计算机估算与管理

本较详尽地介绍了大学物理实验数据的计算机估算与管理系统。它不仅能够对大学物理实验所测数据进行快速估算和对不确定度的估计处理,而且能够对实验数据进行保存、修改、调用等管理性操作。同时对学员的实验结果进行及时有效地评估。对计算机应用于实验教学进行了探讨。     

Pt-SO42-/ZrO2固体超强酸上异丁烷与丁烯烷基化反应

由异丁烷和1-丁烯烷基化合成高辛烷值汽油虽已被广泛用于工业生产,但由于液体酸催化剂存在许多缺点,寻找固体酸催化剂——分子筛、磺酸树脂及固体超强酸已受到国内外学者的广泛重视。对超强酸的研究多集中在SO_4~(2-)/氧化物催化剂上,此类催化剂的酸强度高、热稳定性好、制备简单,对异丁烷、1-丁烯烷基化具有较高的反应活性,但存在着积炭、寿命     

SHAPE MEASUREMENT OF SYNCHROTRON RADIATION WITH HIGH TIME RESOLUTION

By using BWS-5k II streak camera made in China,we have measured the time structure of Synchrotron Radiation (SR) from the relatrivistic electron and positron beam bunches of Beijing Electron Positron Collider (BEPC).The dependence of SR width to the intensity of beam current and the voltage of RF source was also measured.The main data taken with 30ps time resolution in the experiment are as follows: The length of VR at E_e=1.549GeV is changed from 220ps to 670ps when the average beam current from 2mA to 30mA,the variation range of CR length at 20mA beam current is 500—700ps with RF source voltage varying between 250kV and 500kV.The time calibration uncertainty of the experiment is ±15%.The trigger jitter is less than ±200ps.     

N263和TBP为协同流动载体的液膜体系分离钐(Ⅲ)和钆(Ⅲ)的研究

研究了N263和TBP为协同载体的液膜体系分离钐和钆的行为.考察了膜相添加剂、内水相反萃剂、外水相盐析剂和膜相中载体浓度对传质分离的影响.当用TBP作为膜相添加剂时,N263能很好地溶解在煤油中.N263-TBP-LMA-1-煤油和NH₄NO₃协同流动载体液膜体系在迁移稀土离子时表现出"倒序"特性,与单纯的N263体系相比,该体系对钐、钆具有较高的选择性.     

二维色谱/光谱重叠峰的定性定量方法研究(I)——水中多种酚二维色谱/光谱重叠峰的分辨与定性定量

探讨了HELP法在水中酚类色谱重叠峰的分辨与定性定量分析中的应用.实验结果表明,各组分浓度比为1:50的范围内分辨光谱与真实光谱十分吻合.在10^-4～10^-6g/mL的浓度范围内分辨色谱的定量结果线性关系良好.分辨下限3.0×10^-7g/mL,相对标准偏差为5.0%.     

C~4~0, C~4~0^+, Nb@C~4~0^+, NbC~3~9^+, Nb@C~4~0H~4^+的 量子化学研究

用量子化学从头计算方法研究了C~4~0,C~4~0^+,Nb@C~4~0^+,NbC~3~9^+,Nb@C~4~0H~4^+的几何构型、电子结构和C~2~8一样,C~4~0(T~d)基态也为^5A~2态,笼骨架上具有四个悬挂键。计算结果表明C~4~0和C~4~0^+比NbC~3~9^+和Nb@C~4~0^+稳定,与实验结果一致。     

表面活性剂存在下铽-镥(钆、钇)-乙酰水杨酸共发荧光体系的研究

本文研究了镥等三种稀土离子与铽-乙酰水杨酸配合物产生的共发荧光效应。在最佳条件下,Lu³⁺、Gd³⁺、Y³⁺的存在可使铽-乙酰水杨酸配合物的荧光分别增强108,58和73倍。讨论了共发光体系的形成条件和荧光特性。利用Tb-Lu-乙酰水杨酸体系和Tb-Lu-乙酰水杨酸-乙二胺四乙酸-十六烷基三甲基溴化铵体系分析了合成稀土样品和包头稀土标准氧化物中的铽,结果满意,加标回收率为90.5～105.6%,并对共发光的机理和表面活性剂的作用进行了初步探讨。     

红外激光照射对立方体AgBr l颗粒离子电导的影响

经硫醚、二氧化硫脲、金、硫醚加金和二氧化硫脲加金增感后的立方体AgBrⅠ乳剂用Nd:YAG激光的基频输出(1064nm,445mJ/cm²)照射后,乳剂的离子电导率比未照射时增加几倍,并且二氧化硫脲增感后的乳剂离子电导率也显着增加。这些结果表明,进一步的研究有助于阐明红外预增感成像机理。     

Studies on Free Radical EPR,Superoxide Dismutase Water-soluble Lipidperoxide in Tears

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Synthesis and Electro-optical Conducting Properties of Disperse Red 1 Functionlized Polymethylphenylsilane

Polymethylphenylsilane (PMPS) was modified by chloromethylation then condensed with Na salt of Disperse Red 1(DR1). The product, DR1 functionlized PMPS(PMPS-DRD, was thoroughly washed until it had no DRl or other dopant. Its glass transition temperature is 155℃, contains 4.5% weight of DRl residue. The UV-Vis spectrum of PMPS-DRl shows a broad ab-sorption band in the range 400-700 nm. Photoconductivity measured on a 2 μm film made of PMPS-DR1, using a 632.8 nm He-Ne laser beam, shows that it is electric field dependent and in the range of 10^-13 to 10^-11S/cm. The electro-optical coefficient of PMPS-DRl was measured as a value of r₃₃=0.8 pm/V.