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.     

构建我国青少年犯罪防控模式的思考

青少年犯罪是世界上每个国家都不愿意面对而又无法回避的难题。目前 ,青少年犯罪日益突出 ,已成为倍受关注的社会焦点问题。因此 ,对青少年犯罪的防控 ,是整个犯罪控制体系中不可或缺的组成部分。对于青少年犯罪的防控 ,要从两个层面来实现 :一是预防青少年犯罪的发生 ;二是控制、改造青少年犯罪。具体措施应从完善立法、减少司法干预、优化社会环境等五个方面展开。     

idPAD: Paper Analytical Device for Presumptive Identification of Illicit Drugs

As drug overdose deaths across the United States continue to rise, there is increasing interest in field testing of illicit substances. This work discusses a paper-based analytical device (idPAD) that can run a library of 12 colorimetric tests at the same time, each detecting different chemical functional groups and materials found in illicit drugs, distractor substances, and cutting agents. The idPAD requires no electricity, costs less than $2 USD, and requires minimal training to operate. The results of the 12 tests form a color barcode which is “read” by comparison to standard images. The accuracy of the idPAD was assessed using samples of heroin, cocaine HCl, crack, and methamphetamine at concentrations of 25%–100% in a lactose matrix, as well as pure lactose. Based on 840 “reads” by three different users, the idPAD showed 95% sensitivity and 100% specificity for detecting these drugs; the most common error was mistaking cocaine HCl for crack or crack for cocaine HCl. In a second step, samples of heroin, cocaine, and methamphetamine (n = 30) and distractor substances (pharmaceuticals, cutting agents, and other illicit drugs, n = 64) were tested by two readers, yielding a sensitivity of 100% and specificity of 97%. Targeted substances were detected reliably at 55–180 μg/lane, and the idPAD was found to be stable for at least 3 months when stored at room temperature. The library approach used in the idPAD may provide the accuracy and robustness necessary for a presumptive field drug test.     

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.     

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。     

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。     

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。