中药复方和某种植物分泌液对脂质过氧化的抑制作用

利用发光测量法,研究了中药复方、植物分泌液(SL)和植物分泌液复方(SLIV)对Fe2+-亚麻油酸-BSA(牛血清白蛋白)和Fe2+-脑勺浆两个离体体系产生的脂质过氧化(LPO)有抑制作用,抑制程度与用药浓度有关.将中药复方应用于辐照模型,结果表明7Gy的γ射线辐照后小白鼠全血硒谷胱甘肽过氧化物酶(SeGSH-Px)活性降低,恢复缓慢,脑组织脂质过氧化加剧,而事先喂饲中药复方能显著提高SeGSH-Px水平,加速其活力恢复,增强脑组织抗氧化能力;将SL和SLIV应用于脑缺血重灌模型,结果显示沙土鼠脑缺血重灌后全血SeGSH-Px活力下降,血浆MDA上升,SeGSH-Px/MDA值降低,脑组织抗氧化能力下降,而事先喂饲SL、SLIV上述结果正相反,能明显提高机体的抗LPO能力.     

企业办公自动化系统安全机制

办公自动化是企业实现无纸化办公和现代化管理的重要条件,其安全性更是首要考虑的因素。文章以某企业的办公自动化为例详细阐述了基于Lotus Domino/Notes的办公自动化系统安全机制的实现方法,介绍了该企业办公自动化系统的备份策略,最终形成了一种基于业务工作流和角色控制的办公自动化系统安全机制,较好地满足了办公自动化系统的安全需要。     

Simultaneous analysis of anthocyanins and flavonols in petals of lotus (Nelumbo) cultivars by high-performance liquid chromatography-photodiode array detection/electrospray ionization mass spectrometry

A fast and reliable HPLC method for the simultaneous separation of anthocyanins and flavonols in lotus petals was developed based on the study of four candidate solvent systems. Fifteen flavonoids were identified by high-performance liquid chromatography with photodiode array detection/mass spectrometry. Among them, two anthocyanins and nine flavonols were discovered in lotus petals for the first time. This work is valuable for both the hybrid breeding on lotus oriented to flower color and the utilization of lotus petals as functional food materials.     

Development and characterization of poly ethyl metha acrylate–iron oxide(III) based hydrophobic liquid nanocomposite films

Select applications of hydrophobic nanocomposites include preparation of robust self-cleaning surfaces, water-repellent glass surfaces, and waterproofing textiles. Various nanocomposites have been reported in the literature; however, the relationship between the nanocomposite surface morphology and its hydrophobicity needs to be understood better. In the present work Fe₂O₃ nanoparticles and poly ethyl metha acrylate (PEMA) were used in varying proportions to obtain a series of model hydrophobic surfaces (spin-coated on glass substrate). The hydrophobicity of these surfaces was measured by static contact angle; a maximum of 103° was obtained at highest loading of iron oxide nanoparticles. These surfaces were also characterized using AFM. The contact angle and characterization data were used to test some of the models which have been proposed in the recent literature on prediction of contact angle for composite surfaces. It is proposed that the hydrophobicity of the iron oxide–PEMA surface is due to the physical roughness causing air entrapment as well as the chemical heterogeneity. Based on the experimental studies and the simulations using the recent models on contact angle, some general features of relationship between a composite surface morphology and its hydrophobicity is proposed.     

The preparation of lotus-like super-hydrophobic copper surfaces by electroplating

The preparation of super-hydrophobic metal surfaces had to combine rough structures and the surface modifications with low surface energy materials. Although there were different views on it, no experiment was done to prove it yet. In this paper, the structure of natural lotus leaf was observed and the lotus-like surfaces on hydrophilic copper substrates were fabricated via electroplating in large current density. These surfaces were super-hydrophobic without any chemical modification. The hydrophobic mechanism was analyzed. It is believed that this was a meta-stable state in Cassie model. As long as the surface structure was suitable, hydrophobic surface, even super-hydrophobic surface, could be got on hydrophilic substrate.     

电信部门的综合办公自动化系统设计

在第三代办公自动化系统的基础上，结合当前电信部门的实际情况，完成了整个电信部门综合办公自动化系统的设计。着重介绍了系统的网络结构，系统的组成以及系统的功能结构。     

示差脉冲阳极溶出伏安法测定莲子芯中微量铅

采用自制丝网印刷微电极,结合阳极溶出法对微波消解后的莲子芯中的微量铅进行了测定.考察了微波消解条件、缓冲溶液pH值、富集电位、富集时间、脉冲强度、脉冲周期等对检测的影响.试验结果表明:在pH 3.6的乙酸-乙酸钠缓冲溶液中,-1.1 V富集10 s后,电流与铅的质量浓度在1～1 000μg·L-1范围内呈线性关系,相关系数为0.996.测定结果的相对标准偏差(n=5)小于5%,加标回收率为101.9%.     

基于Lotus Domino的简单工作流的设计与实现

在Lotus Domino平台上利用邮件数据库和Lotus Workflow虽然能创建复杂的工作流，但开发人员的工作量较大。为了能迅速地创建工作流应用程序并降低开发工作量，利用“作者”域和视图两类设计元素对数据库中的文档进行过滤，同时在表单中设置状态域，标示文档所处的活动，编程实现文档按状态域被路由到不同的评阅者，从而达到文档流动的目的。利用这种方法可以迅速开发比较简单的工作流应用程序，同时该方法的实现也相对简单，对其他工作流应用系统的开发具有一定参考价值。     

仿荷叶表面研究进展

近年来,荷叶表面的自清洁功能引起人们极大的研究兴趣,这种自清洁功能源自于表面形貌与低表面能物质的共同作用.目前,已用不少方法来制备仿荷叶表面.本文回顾近年来仿荷叶表面研究成果,探讨仿荷叶表面研究与发展趋势.     

Lotus Domino／NotesR5与管理信息系统MIS的集成

阐述办公自动化(OA)系统与管理信息系统之间的集成技术,使整个工作流数据通过OA数据接口与企业现有的MIS系统自动交换数据。以SQL数据库作为后台数据库,通过在notes中调用SQL语句实现二者之间的数据集成,实现了Domino数据库和Sybase/Oracle等关系型数据库的数据信息的交互,使OA系统的协同工作结果能与企业的MIS系统有效的沟通和交换,提高企业的集成工作效率。