新生病毒疾病的研究现状及发展趋势

在过去的20年里新的病毒不断产生以前得到控制的病毒死灰复燃新生和再生的病毒病已成为新世纪世界所面临的重要的公共卫生问题。本文简要介绍了国际上相关领域的研究状况和发展趋势,扼要介绍了我国的情况,对如何加强我国新生病毒的研究提出了几点建议。     

C/S与B/S结合的图书馆管理系统设计

Internet技术的成熟和进步,加快了全球信息化的进程,高校图书馆面临信息服务与网络管理的机遇和挑战。在分析C/S模式与B/S系统结构模式优缺点的基础上,设计出基于C/S模式与B/S模式相结合的混合模式的网络管理系统,以整合图书馆的信息资源和管理系统。     

高校计算机机房管理与维护探讨

高校计算机机房的管理和维护工作是信息教学的重要环节。文章从制定规章制度、利用硬盘保护卡、病毒的防治和机房管理系统几个方面出发，提出了一些计算机机房管理与维护措施。     

Studies on the age dependent changes in serum adenosine deaminase activity and its changes in hepatitis

Serum Adenosine deaminase (ADA) activity in normal healthy control subjects increases upto 30 years, remains steady between 31–60 years of age and shows a steep increase in the age group of 61–70 years. This was compared with serum aspartate transaminase (AST) and alanine transaminase (ALT) activity which also showed a gradual increase upto 40 years of age and decreased thereafter. The activities of serum ADA, AST and ALT increased in patients with hepatitis of all age groups compared to their respective controls. The degree of increase in the activities of the above enzymes in hepatitis, decreased with age. The present study also shows that while studying serum ADA activity in hepatitis for diagnostic purposes, the value obtained in a particular age group should be compared with normal range of values for the respective age group only.     

A tasseled cap transformation for CBERS-02B CCD data

The tasseled cap transformation of remote sensing data has been widely used in agriculture, forest, ecology, and landscape. In this paper, tasseled cap transformation coefficients appropriate for data from a new sensor (China & Brazil Earth Resource Satellite (CBERS-02B)) are presented. The first three components after transformation captured 98% of the four-band variance, and represent the physical characteristics of brightness (coefficients: 0.509, 0.431, 0.330, and 0.668), greenness (coefficients: −0.494, −0.318, −0.324, and 0.741), and blueness (coefficients: 0.581, −0.070, −0.811, and 0.003), respectively. We hope these results will enhance the application of CBERS-02B charge-coupled device (CCD) data in the areas of agriculture, forest, ecology, and landscape.     

Overexpression of the phytochrome B gene from Arabidopsis thaliana increases plant growth and yield of cotton (Gossypium hirsutum)

The phytochrome B (PHYB) gene of Arabidopsis thaliana was introduced into cotton through Agrobacterium tumefaciens. Integration and expression of PHYB gene in cotton plants were confirmed by molecular evidence. Messenger RNA (mRNA) expression in one of the transgenic lines, QCC11, was much higher than those of control and other transgenic lines. Transgenic cotton plants showed more than a two-fold increase in photosynthetic rate and more than a four-fold increase in transpiration rate and stomatal conductance. The increase in photosynthetic rate led to a 46% increase in relative growth rate and an 18% increase in net assimilation rate. Data recorded up to two generations, both in the greenhouse and in the field, revealed that overexpression of Arabidopsis thaliana PHYB gene in transgenic cotton plants resulted in an increase in the production of cotton by improving the cotton plant growth, with 35% more yield. Moreover, the presence of the Arabidopsis thaliana PHYB gene caused pleiotropic effects like semi-dwarfism, decrease in apical dominance, and increase in boll size.     

Preliminary Analysis of Advantages of EB2B Model Compared with Traditional B2B Model

From a business model perspective,both traditional B2B model and eB2B model are made up of the same elements while they have differentiating features separately.     

白头翁高效液相色谱指纹图谱研究

目的：建立白头翁药材高效液相色谱指纹图谱,并比较了不同产地白头翁中白头翁皂苷B。含量的差异。方法：采用Agilent ZORBAXSBC18（4．6mm×250mm,5μm）色谱柱;乙腈（A）和水（B）为流动相,流速1．0ml／min;柱温40oc;检测波长201nm。结果：十批白头翁样品高效液相色谱指纹图谱具有一定的相似性;不同产地白头翁中白头翁皂苷B4。的含量有差异。结论：本法准确、可靠,建立的白头翁高效液相色谱指纹图谱可结合白头翁皂苷B4。含量测定用于白头翁药材的质量控制。     

基于Web技术的综合教学管理平台的设计与应用

针对高校综合教学管理辅助系统中存在的条块分割、系统功能单一、操作复杂、系统之间信息不能共享等问题,利用B/S体系结构、模块化设计和角色权限控制的方法建立教学管理平台的模型,运用Visual Studio2005、SQL Server2005及JSP等技术完成基于Web技术的教学管理平台的搭建。利用该教学管理平台,实现教学管理自动化、网络化和课程综合化,对高校教学管理具有普遍的指导意义和应用推广价值。     

提取分离工艺对白头翁皂苷的影响

优选最佳白头翁皂苷B4提取与分离工艺。本试验采用不同萃取工艺分离白头翁皂苷;采用高效薄层色谱法、高效液相色谱法,通过比较得率、白头翁皂苷B4含量等,考察提取分离工艺对白头翁皂苷的影响。结果：工艺Ⅱ优于工艺I。工艺Ⅱ不仅提取得率高,且皂苷B4集中在正丁醇部分。本项研究对白头翁皂苷提取分离工艺的选用提供了试验依据。