Effect of Aging and Surface Interactions on the Diffusion of Endogenous Compounds in Latent Fingerprints Studied by Mass Spectrometry Imaging,

The ability to determine the age of fingerprints would be immeasurably beneficial in criminal investigations. We explore the possibility of determining the age of fingerprints by analyzing various compounds as they diffuse from the ridges to the valleys of fingerprints using matrix‐assisted laser desorption/ionization mass spectrometry imaging. The diffusion of two classes of endogenous fingerprint compounds, fatty acids and triacylglycerols (TGs), was studied in fresh and aged fingerprints on four surfaces. We expected higher molecular weight TGs would diffuse slower than fatty acids and allow us to determine the age of older fingerprints. However, we found interactions between endogenous compounds and the surface have a much stronger impact on diffusion than molecular weight. For example, diffusion of TGs is faster on hydrophilic plain glass or partially hydrophilic stainless steel surfaces, than on a hydrophobic Rain‐x treated surface. This result further complicates utilizing a diffusion model to age fingerprints.     

肺气虚证与肺阳虚证大鼠血气分析及血液流变学比较

目的 探讨血气分析及血液流变学在肺气虚证和肺阳虚证大鼠中的变化及其作用.方法 将雌雄Wistar大鼠30只随机分为对照组、肺气虚组、肺阳虚组,其中肺气虚证组模型单纯烟熏(香烟、锯末,0.5 h/d),肺阳虚证组采用烟熏和寒冷刺激(0～2 ℃,每次2 h,每日2次),以上各组连续处理7周后取大鼠腹主动脉血,进行血气分析和...     

新形势下基层党组织密切党群关系的路径探析

新形势下,基层党组织要发挥自己在教育群众、联系群众和服务群众的桥梁和纽带作用,需要做到：一是以提升自己“服务”能力为立足点,提高基层党组织资源整合能力;二是建立健全密切党群关系的机制,保证党的群众工作的常态化;三是创新群众工作的方式方法,提高党的群众工作的适应力;四是推进基层民主建设,建立健全权力运行的群众监督机制。     

电热板消解电感耦合等离子体质谱法测定人发中33种无机元素的含量

目的建立头发中33种无机元素的电热板消解电感耦合等离子体质谱（inductivelycoupledplas—ma—IllasssDectrometry,ICP—MS）测定方法。方法以锂（6Li）、锗（^72Ge）、钇（^89Y）、铟（^115In）、铽（^159yb）作内标,硝酸和过氧化氢作为消解酸体系．采用电热板消解对头发进行前处理,ICP—MS法分析人发中33种无机元素的含量。结果电热板消解ICP—MS法的检出限为0．0001μg／g（Th）-10．9μg／g（Ca）,定量限为O．0005μg／g（Th）～25μg／g（Ca）,加标回收率为86％～113％,日内及日间精密度≤9.2％,与微波消解法检测结果相比,差异无统计学意义。结论电热板消解ICP—MS法高效、准确度高,适用于对头发中33种无机元素的分析。     

二乙酰吗啡盐酸盐标准物质的研制（2）-定值和不确定度评定

目的对研制的二乙酰吗啡盐酸盐标准物质进行定值,并评定定值结果的不确定度。方法采用定量核磁共振法和质量平衡法进行定值;采用液质联用法用于有机物杂质的定性分析,采用电感耦合等离子质谱法、离子色谱法、顶空-气质联用法和卡尔费休滴定法测定无机阳离子、阴离子、挥发性有机溶剂残留和水分等杂质的含量。结果定量核磁共振法的纯度为95．6％,不确定度为0．13％;质量平衡法的纯度为95．3％,不确定度为0．93%。结论二乙酰吗啡盐酸盐标准物质的纯度值为95．6％,扩展不确定度为1．2％（k=2）。     

液相色谱-电喷雾离子阱质谱联用测定水中14种除草剂

目的建立水中14种除草剂液相色谱-电喷雾离子阱质谱联用分析方法。方法水样经固相萃取,洗脱液过膜后直接进行液相色谱-电喷雾离子阱质谱联用分析。结果水中14种除草剂定量分析线性关系良好,相关系数为0.995～0.998,检测限在0.005μg/mL～0.045μg/mL之间,在低、中、高3个不同浓度下,平均回收率在70.5%～110.2%之间,日内RSD均小于10.2%,日间RSD均小于14.4%。结论该方法具有快速、灵敏、高效等优点,能够满足相关司法鉴定工作的要求。     

3,4-亚甲二氧基甲卡西酮的鉴定

目的 建立基于傅里叶变换红外光谱(FTIR)、气相色谱-质谱(GC-MS)结合高分辨质谱技术联合鉴定未知样品的方法.方法 未知样品采用红外专用取样器直接检测;甲醇溶解后采用GC-MS和组合型高分辨质谱检测,以MDMA为内标物.结果 未知样品获得的红外光谱特征吸收峰为1679(C=O键),1603,1502,1453,1423,1259,1121,1090,1035,930,887,838,768,742和717cm-1,质谱特征碎片峰(m/z)为58.1,91.0,120.9,149.0和207.0,测得的精确质量数[M+H]+为208.0966.经信息分析未知样品鉴定为3,4-亚甲二氧基甲卡西酮,该物质属于新型化学合成卡西酮类精神活性物质,已经列入部分欧盟国家的管制药物目录.结论 本方法可用于3,4-亚甲二氧基甲卡西酮的鉴定.     

Special Issue on electronic media,markets and civil society in East and Southeast Asia: Introduction

Abstract

The government of Hong Kong has been trying to reform the territory's health care financing system since the early 1990s and is finally on the verge of succeeding. The objective of this paper is to assess the reform efforts and explain the causes of repeated failures and eventual success. It will argue that the government's fortunes changed only after it abandoned the core reform goal and decided to pursue peripheral objectives. It will explain the abandonment with reference to the peculiar political system in Hong Kong that makes it difficult for the government to adopt substantial policy reforms in the face of even moderate opposition. The reason for the government's policy incapacity is the existence of liberalism in a non-democratic setting, which allows the government to neither suppress opposition nor mobilize popular support. This has been illustratively evident in its health care reforms when its proposals to improve the system's fiscal sustainability invariably met an early death because they imposed costs on employers, the population or both. The current proposal has fared better not only because it addresses a simpler peripheral problem but also because it offends almost no one and pleases many among the powerful.     

Mass Media Paradoxes in the Bulgarian Elections of 2001

ABSTRACT

Electoral year '01 marked another headway of the country along the road of its democratic development.

For the first time after 1989, the parliamentary elections (fifth in a row) were not held before their time, but after a normally completed cycle. The unproductive bipolar model of alternating the main political opponents was broken. A new and unusual player of royal blood emerged, who, without any firm structures, with little funds, and under the conditions of political and media hostility, won firmly the majority vote.

For the first time since the outset of transition, a representative of the Left qualified for the presidential post, which was the most articulate acknowledgement that the Left has changed and the most eloquent criticism of the former bearers of public confidence.

Both parliamentary and presidential elections '01 took part under the conditions of a free media system and after the advent of Internet into political campaigning, information, and analysis. Both campaigns and election returns, however, manifested grave professional problems in the domain of sociology and the media that failed to meet the principal requirement for unbiased information and predictability of developments and results. In this situation, the society manifested considerable civil advancement. The paradox of that electoral year was that both Par-Lilia Raycheva is affiliated with the Faculty of Journalism and Mass Communication, The St. Kliment Ohridsky Sofia University, Bulgaria. Parliament and President were elected contrary to sociological forecasts and attitudes.     

大规模侵权民事救济比较研究

目前,世界各国已经面临因高度工业化所引发的各种大规模侵权事件的危害与考验,近年来连续发生在各国的一些大规模侵权事件也预示着风险社会的到来。2008年我国＂三鹿奶粉事件＂、2010年英国石油公司＂墨西哥湾石油泄漏事故＂、2011年日本＂福岛核泄漏事故＂等等。完善大规模侵权中受害人民事救济制度是我国侵权法所面临的重要课题。