驾机U—2的“黑猫”飞行员们

<正>题记:因为曾在"543"部队服役21年,担任过参战导弹营教导员等职务,多次随部队参加跟踪打击台湾U-2间谍飞机的地空游击战;服役期间的1967年9月8日,所在部队导弹14营运用国产兵器,还曾在华东某地一举击落U-2飞机一架。因此,我对驾驶U-2的"黑猫中队"飞行员的命运尤为关切,收集了大量档案资料,撰写此文,以飨读者。     

基于J2ME和J2EE的手机图书馆研究与设计

通过分析目前手机图书馆的发展现状,在J2ME和J2EE技术的基础上,提出并构建了一种与系统无关、与平台无关的新型手机图书馆设计方案.本文论述了系统的技术背景、整体架构以及局部的设计方案,并着重对手机与服务器之间进行无线网络通信时采用的关键技术进行了阐述.     

当前图书馆信息服务的问卷调查分析

当前信息服务呈现多元化特点。根据问卷调查的统计结果,分析了数字化时代各种信息服务的重要程度,阐明了数字资源服务及传统文献资源服务仍是目前主流的信息服务。     

浅议Web2．0环境下公共图书馆的远程服务

文章从web2．0对公共图书馆的影响入手,对公共图书馆在web2．0环境下远程服务的服务内容、服务手段和方式进行了探讨。     

基于图书馆的Web2．0社会化网络参与

Web2．0极大地推动了社会化网络及其服务的发展,而图书馆迫切需要参与社会化网络来加强行业间的合作,延伸服务领域。基于此,考察了当前图书馆参与社会化网络的现状与存在的问题。     

Characteristics of transgenic tomatoes antisensed for the ethylene receptor genes LeERT1 and LeERT2

Two stable transformed lines containing antisense LeERT1 or LeERT2 sequences and their hybridized line were investigated to determine the effect of LeERT1 and LeERT2 specificity in the ethylene receptor family in tomato （Lycopersicon esculenturn Mill.） on ethylene signaling. The transgenic line alel containing antisense LeER T1 displayed shorter length of seedling grown in the dark and adult plant in the light, severe epinastic petiole, and accelerated abscission of petiole explant and senescence of flower explant, compared with its wild type B 1. The transgenic line ale2 containing antisense LeERT2 also exhibited shorter hypocotyls and slightly accelerated abscission. The phenotypes of cross line dale of LeERT1 and LeERT2 were close to alel in many aspects. These results suggested that LeERT1 probably plays a relatively important role in ethylene signaling of tomato growth and development.     

Edaravone protects PC12 cells from ischemic-like injury via attenuating the damage to mitochondria

Background： Edaravone had been validated to effectively protect against ischemic injuries. In this study, we investigated the protective effect of edaravone by observing the effects on anti-apoptosis, regulation of Bcl-2/Bax protein expression and recovering from damage to mitochondria after OGD （oxygen-glucose deprivation）-reperfusion. Methods： Viability of PC 12 cells which were injured at different time of OGD injury, was quantified by measuring MTT （2-（4,5-dimethylthia-zol-2-yl）-2,5-diphenyltetrazolium bromide） staining. In addition, PC 12 cells＇ viability was also quantified after their preincubation in different concentration of edaravone for 30 min followed by （OGD）. Furthermore, apoptotic population of PC 12 cells that reinsulted from OGD-reperfusion with or without preincubation with edaravone was determined by flow cytometer analysis, electron microscope and Hoechst/Pl staining. Finally, change of Bcl-2/Bax protein expression was detected by Western blot. Results： （1） The viability of PC12 cells decreased with time （1-12 h） after OGD. We regarded the model of OGD 2 h, then replacing DMEM （Dulbecco＇s Modified Eagle＇s Medium） for another 24 h as an OGD-reperfusion in this research. Furthermore, most PC 12 cells were in the state of apoptosis after OGD-reperfusion. （2） The viability of PC 12 cells preincubated with edaravone at high concentrations （1, 0.1, 0.01 μmol/L） increased significantly with edaravone protecting PC 12 cells from apoptosis after OGD-reperfusion injury. （3） Furthermore, edaravone attenuates the damage of OGD-reperfusion on mitochondria and regulated Bcl-2/Bax protein imbalance expression after OGD-reperfusion. Conclusion： Neuroprotective effects of edaravone on ischemic or other brain injuries may be partly mediated through inhibition of Bcl-2/Bax apoptotic pathways by recovering from the damage of mitochondria.     

铂微粒修饰碳纳米管-纳米TiO2/聚苯胺复合膜电极对抗坏血酸的电催化氧化

采用循环伏安法,在含有0.2mol.L-1苯胺的0.5 mol.L-1的硫酸溶液中,以50mv.s-1的扫描速度,在-0.1~0.9V范围内实现苯胺在碳纳米管-纳米TiO2膜电极上的电化学聚合,得到翠绿色的聚苯胺膜,并用交流阻抗谱对复合膜的电化学性质进行了表征。在该电极上修饰铂,制得铂微粒修饰聚苯胺复合膜电极,研究了其对抗坏血酸的电催化氧化,发现修饰后的电极对抗坏血酸的氧化有很高的催化活性。     

2006中国互联网前行于理性和秩序的轨道

中国自1994年全功能接入互联网,至今已有12年.1998年底,以新浪、搜狐等门户网站的建立为标志,商业门户网站开始涉足网络新闻传播领域;2000年始,以中央和地方新闻网站建设为标志,中国共产党领导的网络媒体体系形成;以2003年"网络舆论年"和在国内外一系列重大事件报道中展示能量为标志,网络媒体开始跻身中国重要的媒体形态之列.     

Web2．0下的网络广告投放策略

Web2．0是相对Web1．0（2003年以前的互联网模式1的新一代互联网应用的统称．是一次从核心内容到外部应用的革命。随着Web1．0向Web2．0的升级,广告主在广告投放上有了更多选择．投放策略也应随之变化。