低温催化合成纳米CeO_2及其表征

采用低温催化制备了纳米CeO2,该工艺避开了高温煅烧,降低了生产成本,简化了生产工艺,是一项反应物浓度高、条件温和、经济效益好的清洁型工艺。XRD分析表明产物为萤石结构的立方相CeO2;TEM表明产物为球形,粒经分布范围窄;粒度分布仪测定产物粒径为20nm。     

鼎湖山自然保护区胡椒属植物生物学特性研究

研究了鼎湖山自然保护区分布的8种胡椒属植物的外部形态，根尖和茎法细胞的染色体数目，花粉外部形态和繁殖保护方法，并根据研究结果对该保护区内关于本属植物存在的问题和应对策略作了初步探讨。     

The Use of Molecular Dynamics Simulation Method to Quantitatively Evaluate the Affinity between HBV Antigen T Cell Epitope Peptides and HLA-A Molecules

Chronic hepatitis B virus (HBV), a potentially life-threatening liver disease, makes people vulnerable to serious diseases such as cancer. T lymphocytes play a crucial role in clearing HBV virus, while the pathway depends on the strong binding of T cell epitope peptide and HLA. However, the experimental identification of HLA-restricted HBV antigenic peptides is extremely time-consuming. In this study, we provide a novel prediction strategy based on structure to assess the affinity between the HBV antigenic peptide and HLA molecule. We used residue scanning, peptide docking and molecular dynamics methods to obtain the molecular docking model of HBV peptide and HLA, and then adopted the MM-GBSA method to calculate the binding affinity of the HBV peptide–HLA complex. Overall, we collected 59 structures of HLA-A from Protein Data Bank, and finally obtained 352 numerical affinity results to figure out the optimal bind choice between the HLA-A molecules and 45 HBV T cell epitope peptides. The results were highly consistent with the qualitative affinity level determined by the competitive peptide binding assay, which confirmed that our affinity prediction process based on an HLA structure is accurate and also proved that the homologous modeling strategy for HLA-A molecules in this study was reliable. Hence, our work highlights an effective way by which to predict and screen for HLA-peptide binding that would improve the treatment of HBV infection.     

共振瑞利散射光谱法在药物分析中的应用概述

共振瑞利散射光谱法因具有简便操作、灵敏度高的优势,已在药物研究领域得到广泛应用。本文综述了近年来共振瑞利散射光谱法在药物分析测定方面取得的成果,着重介绍在抗生素类,麻醉类、多糖类和一些新药等方面的应用。     

High response organic ultraviolet photodetector based on bis (2-methyl-8-quinolinato)-4-phenylphenolate aluminum

We report highly efficient visible-blind ultraviolet photodetectors based on 1,3,5-tris(3-methylphenyl-phenylamino)-triphenyamine (m-MTDATA) as donor and bis(2-methyl-8-quinolinato)-4-phenylphenolate aluminum (BAlq) as acceptor. Strong photoluminescence quenching of m-MTDATA by BAlq is observed manifesting the efficient photoinduced charge transfer occurs between m-MTDATA and BAlq. The optimized device exhibits a photocurrent of 172 μA/cm² at ?14 V under an illumination of 365 nm UV light irradiation with an intensity of 0.691 mW/cm², corresponding to a responsivity of 248 mA/W. We attribute the high response to the efficient electron transfer from the donor to the acceptor, the feasible level alignment match and the high carrier mobility of photoresponsive materials.     

采用煤矸石为原料合成β-SiAlON晶须及其显微结构研究

以煤矸石和碳黑为主要原料,在1800 K下碳热还原氮化合成了纯度较高、含有大量晶须的β-SiAlON材料.FESEM照片表明β-SiAlON晶须多为细长柱状,直径120～220 nm,长度1.5～5 μm,晶须生长机制由VLS(vapor-liquid-solid)机制和VS(vapor-solid)机制组成.     

电力系统宜用磁阀式可控电抗器进行无功调节

通过对几种无功补偿容量的调节方法进行分析与比较后,认为采用MCR来调节无功输出容量具有平滑连续、不产生过电压、投资省、维护简单、且有双向无功补偿等优点,能实现实时无功功率就地平衡的目标,是提高电网电压质量、降低线损的有效技术措施,适宜逐步推广应用。     

沧州供电公司DMIS系统功能的实现

对沧州供电公司电网调度的现状进行了分析,并针对系统运行中出现的问题提出了改进方案,改进后的DMIS系统更好地满足了电网调度的自动化要求,为调度运行提供了强有力的信息支持。     

柴达木盆地阿尔金东段基岩气藏盖层特征及控藏机制

基于对阿尔金山前东段古近系岩心相、测井相、地震相等分析,发现该地区古近系沉积早期发育一套区域性含膏盐岩盖层。该套含膏盐岩盖层岩性主要为膏质泥岩、含膏泥岩等,纯膏盐发育较少。含膏盐岩盖层发育特征表现为纵向主要分布于路乐河组底部,横向主要发育于尖北、坪西、东坪、牛中等4个局部厚度较大区,且含膏盐岩盖层整体厚度自尖北斜坡区向牛东方向具有逐渐减薄趋势。该地区多类型含膏盐岩的形成及分布特征主要受古近系沉积前的古地貌条件及路乐河组沉积时期的古物源条件、古气候条件联合控制。经综合研究发现该套含膏盐岩盖层的发育程度与油气分布具有良好的匹配关系：含膏盐岩盖层累计厚度较大时,下伏基岩地层油气藏富集,形成构造、岩性、地层油气藏;盖层累计厚度较小时,含膏盐岩盖层相对缺乏,油气向浅层逸散,形成古近系局部盖层和构造控制的多层系构造油气藏。该研究提出阿尔金东段路乐河组含膏盐岩盖层发育特征有效控制气藏纵横向富集规律,并为柴达木盆地下步煤型气有利区预测指明方向。     

基于CORBA的互联体系

从接口定义语言（ Ｉ Ｄ Ｌ）、对象请求代理（ Ｏ Ｒ Ｂ）、对象服务等几个方面对公共对象请求代理（ Ｃ Ｏ Ｒ Ｂ Ａ）体系结构参考模型进行了概括的分析和描述,并对 Ｃ Ｏ Ｒ Ｂ Ａ 与因特网、 Ｗ Ｗ Ｗ 应用相结合后的三层结构模型进行了说明。