龙虎山自然保护区哺乳动物资源及其保护

１９８９～１９９０年，针对不同类群的动物，采用直接和间接调查相结合的方法，对广西龙虎山自然保护区的哺乳动物资源和它们的栖息地植被作了调查。记录该区哺乳动物４４种，隶属８目２１科，其中热带－亚热分布２７种（占６１．３％），与其所处热带、亚热带过渡区的地理位置一致。哺乳动物栖息地植物群落有４种，各有不同的群落特点。     

胺碘酮、心律平对犬缺血M细胞电生理的影响

目的:临床试验表明,Ⅰ类抗心律失常药物虽能抑制心肌梗塞病人的室性心律失常,但增加死亡率,而胺碘酮(Ⅲ类药物)可提高心肌缺血患者的生存率.心室中层肌细胞(M细胞)有其独特的电生理特性并在心律失常发生中起重要作用.方法:采用细胞内玻璃微电极技术,用含胺碘硐或心律平的模拟缺血液灌流M细胞,了解在缺血情况下,两种药物分别对M细胞电生理有何影响.结果:(1)犬左心室M细胞的动作电位呈现出与心外膜层肌细胞相似的峰-谷-穹窿(spike and dome)形态;动作电位时程(APD)随基础起搏周长(BCL)延长而明显延长,即频率依赖性.(2)模拟缺血使M细胞的静息电位(RP)除极、动作电位幅值(APA)和Vmax减小、APD缩短,其APD的频率依赖性减弱或消失.(3)胺碘硐可延缓或减轻缺血引起的电生理变化.(4)心律平明显抑制M细胞的Vmax、APA,并随频率加快而作用增强.进一步加重了缺血引起的动作电位参数的改变,并可造成传导延缓或阻滞.结论:胺碘酮可减轻而心律平则加重缺血引起的M细胞的电生理改变.部分地解释了上述临床试验的结果.     

Transnational Higher Education: A perspective from China

The growth and development of TNHE in China has progressed from an informal, incidental and laissez-faire activity up to 1995 into a currently more systematic and regulated project, largely controlled by the Chinese government through "input"--accrediting, registering, and licensing TNHE institutions, and restricting curricula development in particular study fields, as well as "output"--controlling the types and levels of academic degrees. The forms of franchises, articulation, and twinning as well as study abroad are most popular in China. The major source countries and regions that provide TNHE services in China have changed from the USA in 1997 to Australia and Hong Kong. It is possible that TNHE provided by Australia and Hong Kong, will continue to increase and eventually will constitute a much larger share of the total market in China.     

Simple model for gas holdup and liquid velocity of annular photocatalytic external-loop airlift reactor under both bubble and developing slug flow

Based on the momentum conservation approach, a theoretical model was developed to predict the superficial liquid velocity, and a correlation equation was established to calculate the gas holdup of an annular external- loop airlift reactor(AELAR)in the bubble flow and developing slug flow pattern. Experiments were performed by using tap-water and silicone oil with the viscosity of 2.0 mm²/s(2cs-SiO)and 5.0 mm²/s(5cs-SiO)as liquid phases. The effects of liquid viscosity and flow pattern on the AELAR performance were investigated. The predictions of the proposed model were in good agreement with the experimental results of the AELAR. In addition, the comparison of the experimental results shows that the proposed model has good accuracy and could be used to predict the gas holdup and liquid velocity of an AELAR operating in bubble and developing flow pattern.     

学生突发事件应急处理探讨

构建学生突发事件应急处理预案是有效预防、及时控制和消除学生突发事件的危害，保障在校学生身心健康和生命安全，维护正常的校园秩序，营造良好育人环境的有效方法，也是新时期学生工作的重点。本文从对学生突发事件应急处理预案的认识，对学生突发事件的管理原则、预警机制、处理办法做了探索，力求为预防和高效处理学生突发应急事件提供参考。     

几个初中物理演示实验的改进

1验证力的作用是相互的实验 从废去的玩具、小车上拆下的弹簧管,并将它套在一塑料圆管上,用502胶将塑料圆管的一端水平地固定在实验小车的车头上,用细线将被压缩的弹簧拉紧,如图1所示.     

多元文化融入幼儿园园本课程开发的实践探讨

基于时代多元化的发展和凸显幼儿园特色教育的需要,培养幼儿的多元文化意识是幼儿园教育的必然选择。文章基于多元化的园本课程开发的教育实践探索,论述园本特色教育的功能价值,开发一系列合格的园本特色课程,以提升园本课程的文化内涵。     

国际性行政体制探析

相对于一国政府的行政体制而言,国际性行政体制具有跨国性和非主权性的特点,这也就决定了国际性行政体制独特的运行方式。二战后,以联合国为代表的国际性行政体制有了大规模的发展,呈现出多样化趋势。冷战结束后,国际性行政体制的变革引人注目,各类国际机构不断调整自我,以适应国际合作和国际竞争的需要。     

民办教育地方立法的"政策替代现象"管窥

实证分析表明,我国一方面地方性立法资源的闲置比较严重,另一方面,地方性政策和红头文件替代地方性法规调整了大多数地方民办教育现象。地方性立法知识和立法能力的欠缺也影响了地方性政策向地方性立法的转化。如果我们不进行地方性立法的制度创新,就将会影响未来地方民办教育的健康发展。     

高校自主创新能力保障机制与建设策略

高校自主创新能力是国家创新能力的根本,加强高校自主创新能力建设是现代国家的重要任务.高校自主创新能力包括科学研究创新能力、人才培养创新能力和知识服务创新能力等三个方面.对其建设需要从思想、制度、队伍和管理等四个方面进行.