有机磷农药薄层色谱溴酚蓝显色法的改进

目的对有机磷农药薄层色谱溴酚蓝显色法进行改进,使该检验方法更完善。方法采用薄层色谱溴酚蓝—柠檬酸显色。结果显色背景呈纯正的浅黄色,并且颜色稳定。结论该方法操作简单、快速、检测灵敏度高。     

浓缩、精制及干燥对复方丹参提取液中水溶性成分的影响

目的：筛选出最佳的以丹参为君药的复方中药水提取液的浓缩、精制及干燥工艺及其条件，以使丹参水溶性酚酸尽可能少地被破坏，且其工艺简单、成本低，适宜于大生产。方法：以丹参中丹酚酸为筛选指标，对其精制、浓缩及干燥过程中的工艺条件进行筛选。结果：以90℃减压沈缩，2500r/min、30min离心精制，进口温度为140℃喷雾干燥为最佳的浓缩、精制及干燥条件。结论：该工艺合理、可行，水溶性酚酸得以最大限度地被保留。     

迟发性外伤性脑内血肿脑组织GFAP、S-100和NSE的免疫组织化学研究

应用免疫组织化学ABC法和S－P法，对6例伤后1．5天至2年发生的迟发性外伤性脑内血肿（DTICH）脑组织标本进行神经胶质细胞内胶质纤维酸性蛋白（GFAP）、S－100蛋白（S－100）和神经元细胞内特异性烯醇化酶（NSE）变化和应用价值的研究。尸检和组织学检查发现有脑挫伤等病变。6例DTICH脑组织挫伤及周围区均有明显的GFAP、S－100阳性的细胞变化，细胞数目增多，胞体肥大、增生，免疫组化反应产物增多、深染；神经元细胞NSE免疫组化染色均呈阴性改变。结果表明：6例DTICH脑组织中GFAP、S－100的NSE的免疫组织化学变化是有一定时间间隔的外伤性陈旧性改变，在DTICH的病理诊断上具有重要价值，可作为DTICH法医学鉴定的一个辅助手段。     

Detection of Gamma-Hydroxybutyric Acid in Various Drink Matrices via AccuTOF-DART*

Abstract: A new screening method for detecting gamma-hydroxybutyric acid (GHB) in drink matrices, using the IonSense, Inc. (Saugus, MA) direct analysis in real time (DART) ion source coupled to a JEOL exact mass time-of-flight mass spectrometer (AccuTOF), was validated and compared with the current screening methodology. The DART ion source allows for analysis of samples under ambient conditions with little to no sample preparation. Fifty drink specimens were spiked at levels of 1, 2, 3, and 4 mg/mL GHB, and analyzed on the AccuTOF-DART. Positive detection of GHB occurred for each of the samples at each concentration level, giving 100% accuracy for the samples tested. Twenty-five of the 50 drink specimens were spiked at 1 mg/mL GHB and tested using a color test known as the GHB Color Test #3. Only two of these 25 specimens tested positive for the presence of GHB, giving only 8% accuracy. Implementation of this new methodology as a screening tool for GHB analysis will quickly eliminate negative specimens allowing the examiner to focus analysis time on those that screened positive.     

石胆酸诱发豚鼠胆囊炎动物模型的病理学研究

以酶病理组织化学方法结合胆汁生化分析，研究了石胆酸（ＬＣＡ）诱发豚鼠胆囊炎和胆结石的形成过程中，肝胆系统内源性β葡萄糖苷酸酶（βＧＣＤ）、酸性粘多糖及多种胆汁成分的变化。结果表明，ＬＣＡ能造成肝损伤，引起豚鼠增生性胆囊炎病变；肝和胆囊中内源性βＧＣＤ活性明显升高；胆汁βＧＣＤ含量显著升高，且与ＵＣＢ／ＴＢ比值显著正相关。     

尿液、血液中γ-羟丁酸的气质联用法分析

目的为尿液、血液中γ-羟丁酸(gamma-hydroxybutyricacid,GHB),γ-羟丁酸内酯(gamma-butyrolactone,GBL)和1,4-丁二醇(1,4-butanediol,1,4-BD)的鉴定提供方法和依据。方法100μl尿液或血液以GHBd6为内标,经乙酸乙酯提取、BSTFA衍生化后,用GC／MS法分析。结果测尿液中内源性GHB的线性范围是20-800ng／ml,R2=0.9995,最低检出限为10ng／ml(S／N≥3);测尿液、血液中外源性GHB的线性范围为5-60μg／ml,R2分别为0.9999和0.9928。相对回收率为99％-104％。以所建方法测定了健康志愿者尿液中内源性GHB含量,并考察了健康受试者外源性GHB的代谢情况。结论所建方法准确、便捷、省时、选择性好,适用于法医毒物学鉴定。     

GC／MS检测尿中4种苯氧羧酸类除草剂

目的建立尿中2，4-D、2，4-DP、MCPA、MCPP等4种苯氧羧酸类除草剂的分析方法；方法液液提取分离，乙醚为提取液，DCPA为内标，硫酸正丁醇酯化衍生化，气质联用分析法分析；结果尿中4种除草剂添加样品的相对回收率在80％以上，检测限都在5ng／ml以下，对中毒兔尿样进行了分析；结论对实际发生的中毒案件分析有足够的灵敏度。     

Distributed Generation of Electricity: The Role of Academic Research and Advice in California’s “Clean DG” Policy Network

Deregulation and the combined threats of energy crises and global warming concern nations around the world, yet these issues continue to be addressed more directly by domestic regulatory systems than by international institutions. The present analyses of the integration of distributed sources of power generation (DG) into California’s electric utility system suggests that domestic environmental dilemmas with international repercussions provide an obvious entrée for global environmental policy specialists into the practice of environmental policy-making and law. Here I review current scholarship on policy networks that illuminates the contributions that technical and policy experts can make to such networks surrounding environmental issues. I then introduce the key members of California’s “clean DG” policy network that emphasizes the role of academic experts in this influential political system, and discuss how my own research has impacted the development of the state’s DG policy. I conclude that scholars are well positioned to observe and engage domestic and international environmental policy networks, and thereby also to influence environmental politics and law.     

Diagnostic Value of PSA and AP Tests for the Detection of Spermatozoa in Postmortem Swabs from the Genital and Anal Region in Males

The aim of this study was to clarify whether positive results for prostate‐specific antigen (PSA) and acid phosphatase (AP) occur in postmortem swabs from the genito‐anal region in males (n = 80; 4 regions) and females (n = 20; 3 regions) and to calculate the positive predictive value (PPV) concerning the presence of spermatozoa. In male subjects, the highest incidence of positive test results was found in urethral swabs (PSA 76%, AP 71%) and the lowest frequencies appeared in perianal and rectal swabs (15–20%). Microscopic evaluation for spermatozoa was positive between 39% in urethral swabs and 1% in rectal swabs. PPV regarding positive identification of spermatozoa was 33.3% for PSA and 31.5% for AP. The combination of both tests yielded a PPV of 38.2%. In female cases, no spermatozoa were identified, and one case was PSA‐ and AP‐positive in perianal swabs. Our findings indicate that PSA and AP tests are of limited value for the postmortem detection of spermatozoa in male subjects.     

Caustic Ingestion—A Forensic Overview

The ingestion of corrosive substances may produce severe burns to the upper aerodigestive tract and stomach, particularly if the pH is greater than 12 or less than two. There is a biphasic age grouping with adult cases most often involving self‐harm and pediatric cases accidental ingestion. Three cases are reported to demonstrate characteristic features following the ingestion of potassium hydroxide, glacial acetic acid and Lysol^®, respectively. All deaths were due to the effects of caustic burns to the upper aerodigestive tract, esophagus and stomach with perforation and/or hemorrhage. The extent of injuries in these cases depends on the nature, amount, and concentration of the agent and on the exposure time. A point to note at autopsy is that tissue damage may also occur from postmortem exposure. Typical injuries involve perioral, limb, and trunk burns, with extensive aerodigestive liquefactive/coagulative necrosis causing hemorrhage and perforation.