Fentanyl Detection Using Eosin Y Paper Assays,

Eosin Y is a potential new color test for use in detecting illicit drugs that has not been extensively studied. In the present study, a variety of drugs of abuse and fentanyl analogues were tested to determine which drugs will bind to eosin Y, which functional groups are capable of binding and eliciting a color change, and a mechanism for eosin Y binding to fentanyl. Further, these agents were combined with common cutting agents and other drugs of abuse in order to determine the fentanyl detection limit in a drug mixture using an eosin Y test strip. Additionally, cobalt thiocyanate was used to determine whether the combination of cobalt thiocyanate and eosin Y has the potential to identify fentanyl. Through the testing performed, we concluded that (i) Eosin Y is capable of detecting low amounts of fentanyl down to 1%, (ii) Eosin Y binds to select tertiary amines to produce an orange to pink color change, and (iii) Eosin Y binds to the nonpiperidine ring nitrogen of fentanyl as a primary binding site and the piperidine ring nitrogen as a secondary binding site. While the cobalt thiocyanate assay detected 1% fentanyl in some of the mixtures, eosin Y detected 1% fentanyl in all mixtures. Finally, eosin Y was able to detect fentanyl in forensic case samples containing heroin and various cutting agents. Based on our results, eosin Y has the potential to screen for fentanyl and fentanyl analogues and can detect fentanyl in low amounts when mixed with common cutting agents.     

法治评估的有效性和准确性——以中国八项法治评估为检验分析对象

自余杭法治指数初创至今,法治评估实践在我国已历经15载,现俨然成为中国法治实践学派的标签。那么量化法治实践中究竟如何才能保证法治评估的有效性和准确性?要回答这一问题,首先需要对我国现有法治评估的有效性和准确性进行科学检验。在明确界分法治评估有效性和准确性概念基础上,采用验证性因子分析法、探索性因子分析法对我国4项法治评估的有效性进行检验。经检验,我国法治评估的有效性特征表现为:结构效度低,理论构想的整体符合度低。采用主成分分析法、重新赋值法对我国8项法治评估的准确性进行检验,结果表明,余杭法治指数、四川依法治省评估、中国法治满意度评估等3项准确度低;江苏依法行政评估等1项准确度一般;中国法治政府评估、广东法治政府满意评价、广东法治社会满意度评价、上海法治满意度指数等4项准确度高。文末根据检验结论,提出保证法治评估有效性和准确性4个方面的实验研究路径。     

Testing Antemortem Blood for Ethanol Concentration from a Blood Kit in a Refrigerator Fire

The stability of ethanol in antemortem blood stored under various conditions has been widely studied. Antemortem blood samples stored at refrigerated temperature, at room temperature, and at elevated temperatures tend to decrease in ethanol concentration with storage. It appears that the stability of ethanol in blood exposed to temperatures greater than 38°C has not been evaluated. The case presented here involves comparison of breath test results with subsequent analysis of blood drawn at the time of breath testing. However, the blood tubes were in a refrigerator fire followed by refrigerated storage for 5 months prior to analysis by headspace gas chromatography. The subject’s breath was tested twice using an Intoxilyzer 8000. The subject’s blood was tested in duplicate using an Agilent headspace gas chromatograph. The measured breath ethanol concentration was 0.103 g/210 L and 0.092 g/210 L. The measured blood ethanol concentration was 0.0932 g/dL for both samples analyzed. Although the mean blood test result was slightly lower than the mean breath test result, the mean breath test result was within the estimated uncertainty of the mean blood test result. Even under the extreme conditions of the blood kit being in a refrigerator fire, the measured blood ethanol content agreed well with the paired breath ethanol test.     

朝鲜的核、导战略态势及其影响

朝鲜实施导弹发射和地下核试验,意在实现核拥有,籍以提高对美战略的筹码。朝鲜开展核战略角逐由来已久,先后展开过以守为攻;“边缘”对应;将计就计;以硬对强四个回合。角逐结果虽不乏战术上的小胜,却丧失了战略上的大胜。此番的导弹试射与地下核试验可视为第五个回合,是朝鲜核、导角逐战略“以攻为守”的转换。朝鲜执意实现核拥有纵有多种原因,却因核、导本身所拥有的“双刃剑”作用,带来于己、于他都不利的负面影响。包括:自食其言,愈加难以取信于国际社会;产生连锁反映,引发新一轮的军备竞赛;挑战核不扩散条约,难免遭到更大封杀;破坏合作气氛,延缓统一进程;置中国于尴尬境地,动摇中朝关系基础。朝鲜的“自行其事”难免遭到国际社会更加严厉的抵制。     

利用足迹足型特征分析性别的研究

本文收集252名成年男性和女性赤足足迹样本,对足迹长、宽、跟宽等几种稳定足型尺寸和拇外翻角度特征量进行测量、计算,统计男女足型的特点和分布规律,并利用t检验法对足长/足宽、足长/跟宽、足宽/跟宽等足迹足型特征比例关系的男女差异显著性进行分析,为利用足迹分析性别提供可靠依据。     

毛圆科线虫对苯并咪唑类药物的抗药性

采用虫卵孵化试验对乌鲁木齐地区四个羊场饲养的羊感染的毛圆科线虫对苯并咪唑类药物的抗药性进行了检测.结果显示,两个南山羊场的虫卵孵化半数抑制度(ED50)分别为0.002和0.050μg/mL,两个屠宰场育肥羊场的ED50分别为0.270和0.293μg/mL,屠宰场育肥羊场的ED50远大于世界兽医寄生虫学促进协会推荐的0.100μg/mL.结果表明,该地区羊场存在抗苯并咪唑类药物的毛圆科线虫,而且抗药性程度较为严重.     

韩国对外直接投资与产业结构优化研究

韩国是发展对外直接投资比较成功的新兴工业化国家之一.定量分析显示:韩国对外直接投资促进了国内产业结构的优化,降低国内第一、第二产业结构的比例,明显提高国内第三产业结构的比例.借鉴韩国的经验,我国应该选择制造业作为我国发展对外直接投资的重点行业、注重发挥发展中国家的产业相对优势以及对外直接投资的产业选择方向应与国内产业结构高度化的发展趋势相一致.     

当代公共管理研究的范式观--一项经验研究

以经验事实为依据,勾画出了指导当代美国公共管理研究的范式观.在经验分析的基础上,作者认为,有关公共管理领域是否具有知识核心及其与学科的发展之间的相关性的争论正越来越不重要,因为答案已经显现.重要的是从事公共管理研究的学者应具有清醒的学科自我意识以及对现有的范式有更为清晰的把握.公共管理学科对本领域的常规科学研究活动的自觉意识能够给本学科提供更为清晰的研究焦点,能够提升澄清谬见的敏锐性,进而推动公共管理理论的发展.     

Comparison of Catalytic and Immunological Amylase Tests for Identifying of Saliva from Degraded Samples

The stability of salivary α‐amylase is a critical factor in both catalytic and immunological method‐based forensic saliva identification. This study aimed to assess the sensitivity of catalytic and immunological tests on degraded saliva samples. Degraded saliva stains were prepared by microbial decomposition using humid soil. Salivary α‐amylase activity was catalytically detected both qualitatively and quantitatively using the Phadebas^® amylase test. As immunological methods, we conducted qualitative and quantitative tests using the RSID?‐saliva test and ELISA, respectively. Salivary α‐amylase activity of degraded samples (incubated at 37°C for 12 h) was significantly lower than that of controls in the quantitative tests. All the degraded samples obtained by the humid soil produced negative results in the Phadebas^® tests, but showed positive results in the RSID?‐saliva test and ELISA. These results suggest that immunological tests are effective for testing degraded saliva samples that have lost their enzymatic activity.     

工作执法一网考：公安机关绩效考核的创新与实践

广东公安机关的“工作执法一网考”队伍管理考核模式在理念思路、技术方法、实践成效等方面都取得了突破与创新,为新形势下推动公安队伍管理考核工作的全面创新与持续发展提供理论支持和实践经验。