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.     

基于经络平衡的电导法经络测量分析方法对慢性肾病的诊断价值研究

目的 基于经络平衡理论,探究电导法经络测量值的分析方法,考察其对慢性肾病的诊断价值。方法 纳入健康人群82例和慢性肾病人群222例,采用电导法测量手足井穴和原穴的电阻值,分别计算原穴阴阳比值、井穴阴阳比值、原穴手足比值、井穴手足比值、原穴左右比值、井穴左右比值,采用接收者工作特征（receiver operating characteristic, ROC）曲线考察两组差异具有统计学意义的比值对慢性肾病的诊断价值。结果 两组人群在井穴阴阳比值、原穴手足比值方面比较,差异具有统计学意义（P<0.05）。ROC曲线显示井穴阴阳比值的曲线下面积（area under curve, AUC）为0.618,95% CI为［0.537,0.699］（P<0.05）,原穴手足比值的AUC为0.727,95% CI为［0.655,0.800］（P<0.01）。井穴阴阳比值的最优切点是1.16,灵敏度为0.64,特异度为0.52,原穴手足比值最优切点是1.04,灵敏度为0.68,特异度为0.72。结论 慢性肾病患者的经络平衡处于阴盛阳衰、上盛下衰状态,基于经络平衡的电导法经络测量分析方法具有较好的临床诊断效能。     

茯苓皮总三萜大孔树脂纯化工艺及体外抗炎活性研究

目的 为提高茯苓皮的综合利用价值,建立一种简便的茯苓皮总三萜纯化方法,并通过体外实验验证其抗炎作用。方法 采用HPD-100型大孔树脂吸附法纯化茯苓皮总三萜。基于单因素实验,以总三萜含量为指标,经正交试验优化茯苓皮总三萜纯化工艺。建立脂多糖诱导的RAW 264.7细胞炎症模型,考察茯苓皮总三萜对细胞活力的影响,检测给药后RAW 264.7细胞内一氧化氮（nitric oxide,NO）释放量和肿瘤坏死因子-α（tumor necrosis factor-α,TNF-α）、白细胞介素-1β（interleukin-1β,IL-1β）、白细胞介素-6（interleukin-6,IL-6）水平。结果 纯化后样品总三萜含量增加至70.36%,明显高于粗提总三萜含量（29.76%）,纯化工艺为上柱HPD-100型树脂20 g,上样浓度15 mg/mL,35%乙醇洗脱杂质容积为5倍床体积(bed volume,BV),95%乙醇洗脱三萜容积为4 BV,经实验验证该纯化工艺重复性良好。体外实验结果表明：茯苓皮总三萜在50~250 μg/mL范围内对细胞活力无明显影响;与模型组比较,给药后RAW 264.7细胞内NO释放量和TNF-α、IL-1β、IL-6水平明显降低（P＜0.05）。结论 HPD-100型大孔树脂吸附法纯化工艺能明显提高样品总三萜含量,茯苓皮总三萜具有减轻炎症的作用。     

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。     

广东汉族DXS10011和DXS8377单体型

目的调查DX10011和DXS8377两个X染色体STR在广东汉族男性群体中的遗传多态性。方法DNA样本来自广东汉族男性无关个体,PCR后用聚丙烯酰胺凝胶电泳和银染法进行DNA分型。结果在113名个体中,DXS10011和DXS8377分别检出20和12个等位基因。DXS10011-DXS8377共有72种不同的单体型,最多见的单体型只出现了3次。在没有母亲时,DXS10011-DXS8377的女孩的非父排除率为0.9588。在83个孩子为女孩的三联体家系和29个有两个孩子的家系中,DXS10011和DXS8377均表现为共显性连锁遗传,且没有发现突变。结论本数据表明DXS10011和DXS8377在复杂的亲权鉴定中可提供高的遗传多态性信息。     

证券交易所自律管理行为的司法审查标准——评叶伟钢诉新加坡证券交易所案

现代公共管理不再由政府部门和法定机构大权独揽,未经公法授权的私人机构亦能占据一席之地。一些机构的公法职权与私法职权界限日渐模糊,导致难以判断这类机构实施的行为究竟属于公法范畴还是私法范畴。新加坡证券交易所即属于此种情况的机构。叶伟钢诉新加坡证券交易所案是一个具有里程碑意义的案件,新加坡高等法院通过此案确立了司法审查中的渊源标准与实质标准。即使决策机构未经公法授权,但只要该机构在事实层面上履行了公共职能,其决策就可能需要受到司法审查。叶伟钢诉新加坡证券交易所案中确立的司法审查标准,对于讨论我国证券交易所自律管理行为的行政可诉性问题具有借鉴意义。     

The use of error rates to predict and characterize the efficacy of presumptive field tests

From a forensic perspective, a presumptive test, one which indicates the presence or absence of a certain target material such as blood, is an invaluable tool. Among these tests, there are different specificities, sensitivities, and shelf lives. The accuracy of a test is an algebraic combination of the specificity and sensitivity of the test. Each test has limitations as given by its false positive and false negative rates. The aim of this study was to illustrate how the false positive and false negative rates are to be properly determined using a simulation study for the phenolphthalein test. New presumptive tests must be properly evaluated/validated through testing of commonly encountered household items and other potentially probative items usually found at crime scenes, however, the makeup of test sets must appropriately capture all error rates. In order to correctly use these results when the test is applied to an unknown sample recovered at a crime scene, the error rates cannot be applied directly to estimate whether or not the sample is actually the analyte of interest. In a validation study, the forensic scientist calculates the false positive rate as the p(Positive Reaction|Blood), whereas at the scene, the crime scene investigator wishes to determine the p(Blood|Positive Reaction). All crime scene investigators need to ensure that the conditional is not transposed when interpreting such results. Furthermore, this work provides a model for the assessment of a multiple test diagnostic system intended for investigators.     

硅藻检验方法综述

水中尸体的调查在法医学检案中占了重要的一部分。水中尸体未必就意味着其死亡原因是溺死,也可以由其他原因引起,例如死后入水。实际上,尸体现象很难证明死亡的原因。所以,关于受害者是否为"真的"溺死的问题常常不容易解决。目前,硅藻检验被认为是溺死诊断的"金标准"。通过硅藻的定性定量分析,不仅可以对死亡原因有更直接的判断,也可以指向可能的溺死地点。本文介绍国内外硅藻检验的样本采集、检验方法、结果评价的研究进展,并对硅藻检验研究进行展望。