Dating the writing age of black roller and gel inks by gas chromatography and UV-vis spectrophotometer

The relative and absolute age of roller and gel ink entries determined by gas chromatography (GC) and UV-vis methods are presented in this paper. The relative age of ink entries is concluded by the comparison of solvent amount between questioned and known dated entries. Absolute age of ink entries is estimated through the changing ratio of solvent components between heated and unheated samples without known samples for comparison. The methods are accurate and reliable.     

从明清晋商看诚信

诚信是中华民族的传统美德,也是晋商的成功之本。明清晋商以诚信为经营理念、无形资产和修身准则,雄居商界达五个多世纪。晋商对我国社会主义市场经济的健康发展仍具有重大的现实意义。     

工程建设领域引入“廉洁监理”的设想

当前,工程建设领域缺乏有效的监督制度和监督机制,导致了较为严重的腐败问题。因此,工程建设领域要引进和建立“廉洁监理”,从机构、制度、方式、协调与轮换等基础工作做起,以利于从机制、制度上来遏制腐败。     

利用碘胶纸贴附法显现汗潜手印

碘熏显手印法，是现场勘查中显现汗潜手印的方法之一。由于传统的和现有的方法有时受到现场空间的制约，无法兼顾水平面、垂直面、凸凹面以及狭窄处的手印显现。为此，笔者研制了一种安全、快捷、简易、经济、适用于基层使用的操作装置和方法。     

多媒体技术在英语教学中的应用

现代多媒体技术为英语教学开拓了一片新天地,为变革英语教学模式奠定了良好的理论基础和实践基础,通过课堂案例分析和探讨,多媒体英语教学为学生提供了生动、直观的学习资料,达到了培养学生阅读能力、实现外语交际功能的目标,最终实现英语教学的最优化。     

论侦查讯问谋略的结构体系

侦查讯问谋略是由谋略主体、谋略对象、内容和谋略场四个要素有机地构成的整体。以讯问谋略主体为核心,各要素在整体运行当中相互依存、相互作用。侦讯谋略的结构体系是由讯问谋略、讯问方法、讯问语言及其他相关因素之间的搭配、排列而构成。     

努力创造“大教肓、大转变、大服务、大发展“的生动局面——中共大连市委深化共产党员先进性教育的积极探索

在全党深入开展的保持共产党员先进性教育活动中,中共大连市委紧密联系大连市党的建设、改革开放和现代化建设实践,坚持高标准设计、高起点开局、高强度推进、高质量运行,创造了"大教育、大转变、大服务、大发展"的生动局面.     

On the Run

正Marathons are proving to be a victory for mass fitness in China Listen closely.Can you hear that?It's the sound of millions of feet pounding the roads in China,and it's getting louder with every step.Marathon fever is sweeping the country.Looking back to the early stages of mara-     

Green Machines

正The popularity of new-energy vehicles makes an important contribution to China’s green development Due to low costs and emissions,newenergy vehicles(NEVs) are becoming increasingly popular worldwide.On the streets of Beijing,NEVs are distinguishable by their six-digit,bright green license plates.And a quick look around the streets of