固相萃取、气相色谱法测定拟除虫菊酯农药

研究了水样中的微量拟除虫菊酯农药用固相萃取(C18)、GC/ECD法进行测定结果表明,250ml空白水中添加2μg混标拟除虫菊酯农药,氯氰菊酯、氰戊菊酯和溴氰菊酯回收率分别为37.7%、94.4%和78.2%.该方法简单快速、效果好,已成功应用于实际办案中.     

体液中常见滥用药物的系统筛选分析

本文建立了体液中常见滥用药物的筛选分析体系.尿液或血液经固相萃取(SPE)或液提取(LLE)后,直接用GC/NPD分析或经TFA、BSTFA衍生化后用GC/MS分析.方法适用于同时分析甲基苯丙胺、MDMA、度冷丁、去甲度冷丁、曲马多、美沙酮、EDDP、可卡因、苯甲酰芽子碱、可待因、安定、氯丙嗪、吗啡、单乙酰吗啡等十四种常见滥用药物及代谢物.SPE法和LLE法回收率分别为66～102%和50～86%,最低检出限为2-5ng/ml尿.涉毒案件的鉴定应用表明该分析方法简便、快速、可靠.     

The Impact of the 1994 Federal Assault Weapon Ban on Gun Violence Outcomes: An Assessment of Multiple Outcome Measures and Some Lessons for Policy Evaluation

The Federal Violent Crime Control and Law Enforcement Act of 1994 bans a group of military-style semiautomatic firearms (i.e., assault weapons) and ammunition magazines capable of holding more than 10 rounds. Ban advocates argue that these weapons are particularly dangerous because they facilitate the rapid firing of high numbers of shots. Though the banned guns and magazines were used in only a modest fraction of gun crimes before the law, it was hypothesized that a decrease in their use might reduce gunshot victimizations, particularly those involving multiple wounds and/or victims. In response to a Congressional mandate for an impact assessment of the law, this study utilized national and local data sources and a variety of analytical techniques to examine the ban's short-term impact on gun violence. The ban may have contributed to a reduction in gun homicides, but a statistical power analysis of our model indicated that any likely impact from the ban will be very difficult to detect statistically for several more years. We found no evidence of reductions in multiple-victim gun homicides or multiple-gunshot wound victimizations. The findings should be treated cautiously due to the methodological difficulties of making a short-term assessment of the ban and because the ban's long-term effects could differ from the short-term impacts revealed by this study.     

The Role of Perceived Parental Knowledge on Emerging Adults’ Risk Behaviors

The purpose of this study was to gain a clearer understanding of the relation between parents’ knowledge of their emerging-adult children and emerging adults’ risk behaviors. Participants included 200 undergraduate students between the ages of 18 and 25 (121 women, 78 men; M _age = 19.59, SD = 1.62) and both of their parents. Results revealed that knowledge of the emerging-adult child’s activities varied as a function of parent- and child-reports, and that child outcomes associated with parental knowledge were generally positive, including less drinking, drug use, and risky sexual behavior (although this varied as a function of reporter). The links between maternal knowledge and lower drug and alcohol use were particularly strong in the presence of maternal closeness. Implications for understanding the parent–child relationship during the transition to adulthood were discussed.

The Impact of Language Status as an Acculturative Stressor on Internalizing and Externalizing Behaviors among Latino/a Children: A Longitudinal Analysis from School Entry through Third Grade

This study examined the relationship between limited English proficiency status, and internalizing and externalizing behaviors among a sample of Latino/a children (N = 2,840) from the US Department of Education’s Early Childhood Longitudinal Study, Kindergarten (ECLS-K) data set. Results of cross sectional regression and hierarchical linear modeling (HLM) analyses suggest that there is a positive relationship between limited English proficiency and externalizing symptoms, particularly by third grade. Additionally, sex and place of birth also helped to explain externalizing behaviors at various time points in the models. Place of birth and family poverty were significantly associated with internalizing symptoms. Implications for future research and interventions related to internalizing and externalizing behavior among the Latino/a school aged population are discussed.

图们江地区开发开放再度升温

在区域合作一体化成为新一轮发展新模式的时代,东北亚地区间国际关系的改善和各国经济形势的好转,延边内生动力的驱动,为图们江地区开发创造了良好的条件。由此,UNIDO、国家、省、州对图们江地区开发的关注再度升温,周边国家的开发热情再度升温,延边由"主动参与"演变为"主导发展"的角色。为了提高图们江地区开发的深度与质量,提出了创新国际合作开发体制的新机制,并制定了建设新的增长点与畅通的对外通道、建立综合配套改革试验区与金融支撑体系等对策建议。     

Comparing Putin’s and Brezhnev’s Policies toward the Middle East

This article compares Moscow’s and Washington’s foreign policies toward the Middle East in 1982 and 2008. In 1982, Moscow and Washington each had a distinct set of friends and foes. In 2008, Washington still has a distinct set of friends and foes, but Moscow has relatively good relations with all governments and most major opposition movements in the region—the only exceptions being Al Qaeda and its affiliates. It is argued that Putin’s policy toward the Middle East is not really aimed at displacing the U.S. in the region, but protecting Russia and Russian interests from Al Qaeda and its allies. Indeed, a continued American presence in the region serves to protect Russian interests in the region.

论犯罪学意义上犯罪的刑事违法性

本文主要通过比较犯罪学和刑法学在看待犯罪的基本属性上的差别 ,推导出犯罪学特有的犯罪基本属性 ,即违反否定性的社会规范性。     

论新闻工作者的现代意识

为适应知识经济时代的要求 ,增强现代意识 ,提高现代素质 ,是新闻队伍建设的当务之急。新闻工作者应解放思想 ,更新观念 ,更新知识 ,努力创新     

社区工作者与传统居委会干部之专业比较

社区建设的发展和深入 ,关键在于社会工作者的自身建设。本文从六个方面论述了社区工作者与传统居委会干部的不同 ,从而确立了社区工作者的专业角色特征