溴氰菊酯在急性中毒大鼠体内的分布

目的建立溴氰菊酯灌胃急性中毒大鼠模型及生物样品中溴氰菊酯的气相色谱-电子捕获检测器法(gas chromatography-electron capture detector,GC-ECD),研究溴氰菊酯在急性中毒大鼠体内的分布特征,为溴氰菊酯中毒案件的法医学鉴定提供参考依据。方法不同剂量(512和1024mg/kg)溴氰菊酯灌胃染毒大鼠后1.5 h处死,迅速解剖取血液、心、肝、肺、肾、脑等,样品经无水硫酸钠研磨,混合溶剂[V(石油醚)∶V(丙酮)=4∶1]浸提,GC-ECD法定量检测溴氰菊酯含量。结果溴氰菊酯与内源性杂质分离良好,血液和肝中溴氰菊酯定量限分别为0.1μg/mL和0.1μg/g(S/N≥10),血液中溴氰菊酯的回收率为91.55%~134.37%,日内精密度和日间精密度均小于5.67%。溴氰菊酯在512 mg/kg剂量灌胃染毒大鼠体内分布为:肺肝心肾血液脑;在1 024 mg/kg剂量灌胃染毒大鼠体内分布为:肺血液心肾脑肝(P0.05)。结论本研究建立的溴氰菊酯GC-ECD检测方法灵敏度高。溴氰菊酯在体内的分布存在剂量依赖,血液、心、肝、肺、肾、脑可作为体内溴氰菊酯分析的良好检材。     

上月世界大事

7月1日 俄罗斯总统普京访美，做客老布什庄园，提出俄可使其在阿塞拜疆设立的加巴拉雷达站现代化，以替代美准备在波兰、捷克部署的反导系统，建议让更多的欧洲国家参与导弹防御合作，布什未同意。     

东盟决策机制与东盟一体化

东盟的决策机制深具亚洲特点,东盟首脑会议和部长会议,尤其是外交部长和经济部长会议是东盟的主要决策机构;这些机构奉行全体一致原则、不干涉内政原则、y—x原则和协商原则,充分体现了东盟各国追求平等、互相尊重而又灵活应变的精神;颇具特色的决策机制有效地推动了东南亚国家的一体化,但随着东盟的扩大和深化,这一决策机制也暴露出沟通不足、效率低下等问题,如何改进决策机制,乃是东盟新世纪发展的重要课题。     

The Optimization of Electrophoresis on a Glass Microfluidic Chip and its Application in Forensic Science

Microfluidic chips offer significant speed, cost, and sensitivity advantages, but numerous parameters must be optimized to provide microchip electrophoresis detection. Experiments were conducted to study the factors, including sieving matrices (the concentration and type), surface modification, analysis temperature, and electric field strengths, which all impact the effectiveness of microchip electrophoresis detection of DNA samples. Our results showed that the best resolution for ssDNA was observed using 4.5% w/v (7 M urea) lab‐fabricated LPA gel, dynamic wall coating of the microchannel, electrophoresis temperatures between 55 and 60°C, and electrical fields between 350 and 450 V/cm on the microchip‐based capillary electrophoresis (μCE) system. One base‐pair resolution could be achieved in the 19‐cm‐length microchannel. Furthermore, both 9947A standard genomic DNA and DNA extracted from blood spots were demonstrated to be successfully separated with well‐resolved DNA peaks in 8 min. Therefore, the microchip electrophoresis system demonstrated good potential for rapid forensic DNA analysis.     

金正恩时代的朝鲜和图们江区域的中俄朝合作

朝鲜的稳定发展和朝鲜半岛的无核化,符合我国利益。西方力图颠覆朝鲜政权。朝鲜政权能够生存,关键在于高层领导内部的求同存异、精诚团结,并得益于有效地强化政治教育、对西方渗透的严防死守。金正恩成为领袖,将集全权于一身,独自领导朝鲜。朝鲜的经济体制正在发生变化,"中产阶级"的代表已经出现,原始的资本主义方式成为许多朝鲜人谋生的手段。金正恩需要改变朝鲜的贫穷状况,让人民富裕,出现了改革的舆论和迹象。近年,中俄两国均积极采取措施帮助朝鲜改善管理制度、培育造血功能。中朝共同开发、共同管理罗先区和黄金坪、威化岛,俄罗斯推出俄朝韩三方合作新模式。目前朝鲜投资风险大,预期回报率低。建议中俄应排除干扰,求同存异,积极探索互相配合、分担和分摊风险、减轻负担,有利各方的合作途径。充分发挥中国政府的图们江开发战略和中俄两国元首签署的区域合作规划战略的作用,进一步深入开展合作。     

MOAS在住院精神障碍患者暴力风险评估中的应用

目的探索修订版外显攻击行为量表(Modified Overt Aggression Scale,MOAS)用于预测精神障碍住院患者发生严重攻击行为的价值,为住院精神障碍患者的暴力风险评估提供理论依据。方法由经过培训的医务人员对某精神卫生专科机构2009年9月在院的918例住院患者采用MOAS进行评估,并随访2年内是否发生严重攻击行为。通过SPSS 21.0分析采用MOAS评估预测精神障碍患者发生严重攻击行为的价值。结果 (1)与未发生严重攻击行为者相比,2年内发生严重攻击行为者,其MOAS评分中言语攻击、财物攻击、身体攻击和加权总分存在差异(P0.05);(2)MOAS中的言语攻击评分,与2年内精神障碍患者的严重攻击行为相关(P0.05);(3)通过MOAS各项评分预测2年内精神障碍患者是否出现严重攻击行为时,言语攻击、体力攻击及加权总分三项评分存在一定的价值(P0.05)。结论 MOAS评分用于预测住院的精神障碍患者2年内发生的严重攻击行为时,存在一定的价值。     

从社会转型看政府在公私领域价值取向的重心偏移

在我国社会转型过程中,政府在公私领域价值取向重心对社会将产生重大影响。转型初期的政府采取效率优先、兼顾公平的理念,价值取向重心向私域偏移。在经济高速发展的同时,社会矛盾逐渐凸显。在和谐社会构建过程中,政府价值取向重心应逐步向公域偏移,做到效率与公平并重。     

The application of mitochondrial DNA cytochrome oxidase II gene for the identification of forensically important blowflies in Western China

Blowflies found on human corpses are important for the estimation of the postmortem interval and other questions of forensic relevance. Some of these species are difficult to differentiate morphologically, and therefore a molecular method was elaborated for species identification. Here, we describe a molecular method for rapid identification of these insects. Specific insect DNA fragments were amplified using the polymerase chain reaction, followed by direct DNA sequencing of the amplification products. Analysis of the cytochrome oxidase II sequences revealed abundant phylogenetically informative nucleotide substitutions that could identify blowfly species to species group. In contrast, because of the low level of sequence divergence of sister species, the data could not distinguish among taxa from the same species group, ie, the species within the Lucilia sericata and Lucilia cuprina groups. The molecular data support the existing species group separation of the taxa within the Calliphora. Because of the speed and accuracy of current nucleotide sequencing technology and the abundant apomorphic substitutions available from mtDNA sequences, this approach enables quick identification of species used for estimation of postmortem interval.     

Building little safe and civilized communities: community crime prevention with Chinese characteristics?

This article describes a community crime prevention program in China, set against a background of rapid economic development, large internal population migration, and increasing crime rates. Traditional social control in China has been transformed to adapt to the new reform era, yet some mechanisms remain intact. Crime prevention measures and strategies resemble those adopted in the West; however, the differences, constituting the so-called Chinese characteristics with community crime prevention are significant.     

Expressions of GABA and GABA(A)R-alpha1 in the brain of rats poisoned by tetramine

OBJECTIVE: Expressions of GABA and GABA(A)R-alpha1 in the brain of rats poisoned by Tetramine were analyzed to explore the intoxication mechanism. Methods Sixty rats were randomly divided into control, sham poisoned, high-dose poisoned (1.0 mg/kg tetramine) and low-dose poisoned (0.1 mg/kg) groups. The expressions of GABA and GABA(A)R-alpha1 in the brain of the poisoned rats were detected and analyzed by immunohistochemistry and imaging analyzer. Results The expressions of both GABA and GABA(A)R-alpha1 were diffusely seen in the brains of the control and shame poisoned rat groups with a moderate expression level, whereas the expressions of both GABA and GABA(A)R-alpha1 were decreased in the brains of the high-dose poisoned group. In the low-dose poisoned rat group, the expression of GABA initially decreased and reached its lowest level 6 hours after poisoning, and then started to show an increase and reached the level of control groups at day 3. The expressions level reached its peak at days 5-7 after poisoning and remained above the level of control groups till 10 days after poisoning. Similarly, the expression of GABA(A)R-alpha1 in the brains of the low-dose poisoned group initially decreased and reached its lowest level 6-12 hrs after poisoning, and then started to increase and reached the level of control groups at days 7-10 after poisoning, respectively. Conclusion The expression of both GABA and GABA(A)R-alpha1 decreased in the brains of the high-dose poisoned rat group and these changes of GABA and GABA(A)R-alpha1 expressions may be associated with underlying mechanism of tetramine poisoning.