Multilayered polyelectrolyte-coated gold nanorods as multifunctional optical contrast agents for cancer cell imaging

We report the application of multilayered polyelectrolyte-coated gold nanorods(GNRs) as multifunctional optical contrast agents for cancer cell imaging.The surface modification of GNRs improves their chemical stability and facilitates them to be taken up by cancer cells through electrostatic interaction.The unique longitudinal surface plasmon resonance property of GNRs makes them suitable as both scattering contrast agents and Raman contrast agents.In our experiments,the staining of GNRs in cells was furthe...     

Sodium tetrachloroaurate(III) dihydrate-catalyzed efficient synthesis of 1,5-benzodiazepine and quinoxaline derivatives

Both 1,5-benzodiazepine and quinoxaline derivatives are important heterocycles in pharmaceuticals. We describe an efficient and clean method for the synthesis of 1,5-benzodiazepines from o-phenylenediamine and ke-tones catalyzed by sodium tetrachloroaurate(III) dihydrate under mild conditions. The catalyst was shown to be equally effective for the synthesis of quinoxalines from o-phenylenediamine and α-bromo ketones under the similar reaction conditions. This method produced good yields.     

世界男子跆拳道技战术的发展趋势和中国跆拳道男队的差距分析——2006 年“伊朗公开赛”和“卡拉奇城市金杯赛”综述

通过对中国男子跆拳道队参加2006年伊朗公开赛、卡拉奇城市金杯赛的观察和收集到的部分材料，对世界男子跆拳道技战术的最新发展趋势进行了归纳；在与跆拳道运动项目世界强队的比较中，对中国跆举道男队存在差距的主要表现进行了归纳，对差距产生的原因进行了简要分析。     

对我国“奥运争光计划”的多维审视

运用文献资料和比较研究等方法,对我国两期“奥运争光计划”的出台动因、目标措施、历史功绩和存在问题进行了分析和解读。“奥运争光计划”的历史功绩主要表现在保持了我国竞技体育在奥运会上的成绩持续增长、促进了我国竞技体育项目的发展、为将社会公益金注入竞技体育发展提供了较充分的理由、增强了国民的民族认同感4个方面。“奥运争光计划”在颁布和实施过程中也助长了“奥运战略”向“金牌战略”的蜕变,催生了竞技体育发展中狭隘的“金牌主义”,阻碍了竞技体育自身“造血”机制的形成。从发挥竞技体育本身应有的社会价值来说,“奥运争光计划”在实施中还需要新思路,即坚定不移地走社会化发展之路,让俱乐部为国家队工作。     

潮州祭祀用品“金银纸”里的化学

金银纸是潮州民俗活动中常用的祭祀品.为了挖掘地方文化精华服务于教育,以金银纸为研究对象,探讨了与金银纸密切相关的锡箔的加工、焚烧,以及锡箔灰回收等过程中蕴含的化学现象,揭示了各环节物理、化学变化存在的科学原理,实现了区域文化中化学文化的提炼,给课堂教学提供了丰富的原始素材.     

'Poisoned history': a comparative study of nationalism,propaganda and the treatment of war and peace in the late nineteenth and early twentieth century school curriculum

This paper investigates the educational philosophy and practices of Achimota School, which was established in the Gold Coast Colony (the southern part of today’s Ghana) in 1927 as the governmental model school for leadership education. Achimota’s education aimed to develop leaders who were ‘Western in intellectual attitude’, ‘African in sympathy’. To fulfil this objective, Achimota attempted to develop a curriculum that took into account the sociocultural background of African students while trying to provide an education on a par with that available at English public schools. The paper first examines the discourse surrounding the establishment of a model secondary school for African leadership, which involved diverse groups of people – colonial officials, missionaries, European educationists, traditional chiefs and African nationalists – and then reviews the relevant educational philosophies of the twentieth century. Finally, the paper describes the Achimota education as experienced by students, a mixed product of English public school tradition and ‘African tradition’. Regardless of the efforts to balance the two ‘traditions’, what was actually created was a new Achimota culture that selected essences from different ‘traditions’ and remoulded them for a novel purpose.     

中国民众“奥运金牌情结”的历史成因与现状研究*

从社会、历史发展等多个角度探析了中国民众"奥运金牌情结"的成因,在调查当今民众对奥运金牌态度与认识的基础上,重新审视了奥运金牌的当代价值。     

A Preliminary Study of the Effect of Ingestion of Gold on Blood Chemistry

Ten milligram of pure gold foil was given by mouth for 16 days. Routine blood chemistry was done before and after gold therapy and repeated after 3 weeks of cessation of therapy. All the blood values were well within normal range and variations, except the enzymes—creatine phosphokinase and lactate dehydrogenase, which decreased substantially on gold foil ingestion indicating possible inhibition of these blood enzymatic activity by gold.     

Whats UpGold V14软件在网络监控系统中的应用

随着空管系统网络设备的不断增加,网络管理的作用越来越重要,而网络监控又是网络管理的核心内容。文章首先讨论了网络监控的基本原理,然后介绍了WhatsUp Gold网络监控软件,阐述了该软件的体系结构,给出了该软件在空管网络监控管理系统种的应用实例。