HPLC-UVD/FLD法测定血中氟乙酸类杀鼠剂

目的采用水相催化衍生化-液相色谱-紫外/荧光检测分析法,检测血中氟乙酸类杀鼠剂。方法血样经乙腈沉淀蛋白后,加入衍生化试剂4-溴甲基-7-甲氧基香豆素、催化剂四丁基溴化铵,在80℃水浴中衍生化反应120min,衍生产采用液相色谱-紫外/荧光检测分析。结果紫外检测法:氟乙酸根浓度在0.38～38.50μg/mL之间线性关系良好,最低检出限为0.10μg/mL;荧光检测法:氟乙酸根浓度在0.15～15.40μg/mL之间线性关系良好,最低检出限为0.050μg/mL。结论水相催化衍生化-液相色谱-紫外/荧光检测分析方法具有较好的灵敏度、准确性和精密度,可用于实际案例检测。     

应用斑点ELISA快速进行体液(斑)的血型测定

<正> 在法医学上体液(斑)的血型测定一般常规应用中和试验、吸收试验、解离试验及混合凝集反应。这些试验既耗时,又需较高的技术,且要新鲜标准红细胞指示结果。本实验系应用我们自己提纯标酶的抗-A,-B与抗-H单克隆抗体A,利用斑点ELISA来进行体液(斑)的血型测定。通过颜色变化直接判断血型。     

microRNA Detection in Blood,Urine, Semen,and Saliva Stains After Compromising Treatments

Evaluation of microRNA (miRNA) expression as a potential method for forensic body fluid identification has been the subject of investigation over the past several years. Because of their size and encapsulation within proteins and lipids, miRNAs are inherently less susceptible to degradation than other RNAs. In this work, blood, urine, semen, and saliva were exposed to environmental and chemical conditions mimicking sample compromise at the crime scene. For many treated samples, including 100% of blood samples, miRNAs remained detectable, comparable to the untreated control. Sample degradation varied by body fluid and treatment, with blood remarkably resistant, while semen and saliva are more susceptible to environmental insult. Body fluid identification using relative miRNA expression of blood and semen of the exposed samples was 100% and 94%, respectively. Given the overall robust results herein, the case is strengthened for the use of miRNAs as a molecular method for body fluid identification.     

Validation studies of rapid stain identification-blood (RSID-blood) kit in forensic caseworks

When bloodstains are detected at crime scene using presumptive tests (e.g. luminol, phenolphthalein, leuchomalachite green), it is important to establish the real human nature of each stain. This is possible using confirmatory tests. One of these is rapid stain identification-blood (RISD-blood) a lateral flow immuno-chromatographic strip test format which allows the identification of human blood by detection of glycophorin A, a red blood cell membrane antigen, using two anti-human glycophorin A (GPA) monoclonal antibodies.The aim of this study is to assess the sensitivity of RSID-blood test in old, degraded bloodstains and in some bloodstains previously treated with BlueStar Forensic, a presumptive test which is often used in crime scene investigations to detect latent bloodstains. The genetic analysis of all bloodstains of confirmed human nature was subsequently performed using the AmpF1STR Identifiler PCR Amplification Kit (Applied Biosystems), to validate the possibility of obtain a consistent and reliable DNA typing results.     

血液和尿液中多种头孢菌素的HPLC分析

目的 建立检测血液和尿液中头孢唑啉、头孢拉定、头孢哌酮和头孢噻肟的高效液相色谱法,并考察方法的适用性.方法 以乙酰苯胺为内标,血液和尿液用乙腈直接沉淀蛋白,采用Agilent Zorbax SB-Aq(250min×4.6mm,5 μm)色谱柱,流动相选用水(含0.12%三乙胺和0.12%乙酸)和乙腈的混合溶剂梯度洗脱,流速1 mL/min,检测波长254nm.结果 4种头孢菌素分离完全,工作曲线相关性均良好(r>0.9990),检出限为0.01μg/mL,回收率均不低于81.2%.结论 所建立的方法对血液和尿液中以上4种头孢菌素的检测快速、简便、准确,适用于实际检案中头孢菌素类药物的分析.     

肾康注射液对肾小球系膜细胞自分泌ET-1、NO水平的影响

目的：探讨肾康注射液（ＳＫＩ）阻抑肾小球硬化（ＧＳ）,防治慢性肾功能衰竭（ＣＲＦ）的部分作用机理,为ＳＫＩ临床应用提供依据。方法：采用放射免疫检测技术,观察ＳＫＩ对体外培养人肾小球系膜细胞（ＧＭＣ０自分泌内皮素－１（ＥＴ－１）,一氧化氮（ＮＯ）水平的影响。结果：ＳＫＩ及其含药血清明显抑制自分泌ＥＴ－１,促进其自分泌ＮＯ,有量效依赖性;与肝素合用,协同抑制ＧＭＣ自分泌ＥＴ－１水平。     

固绿显现血手印方法的研究

固绿显现剂是一种血手印显现新试剂,该试剂对新鲜的或陈旧的血手印都有较好的显现效果,刺激性气味小,对人身体伤害小。该试剂的研发为现场血手印的显现提供了一种新的可供选择的方法。     

DVC微量注射VIP对大鼠GMBF放大和电针调整效应

目的：采用中枢迷走神经背核复合体（DVC）微量注射血管活性肠肽（VIP）,观察胃黏膜血流量（GMBF）变化和电针对GMBF的调整作用。方法：采用脑立体定位仪对大鼠中枢进行定位和注射,电针足三里穴,用氢气清除法测定GMBF;放射免疫法测量外周血中VIP含量。结果：DVC微量注射VIP后,血中VIP含量增加（P＜0．01）,GMBF明显增加（P＜0．01）。电针（EA）足三里穴加强了GMBF放大效应。结论：DVC注射VIP对GMBF有放大效应,证实在神经－内分泌－免疫网络系统（NEIS）中VIP是重要的神经肽,DVC是VIP作用的社会中枢特异性部位之一,电针具有协同作用。     

羊源巴贝斯虫未定种甘肃敦煌株的发现

采用动物接种法将采自甘肃敦煌的15只绵羊血液混合后感染1只除脾绵羊,感染后逐日做血涂片检查。结果显示,在感染后第10天的血片上出现了1种大型巴贝斯虫。虫体形态以双梨子形、单梨子形、圆形及卵圆形为主。在感染后第12天,感染羊体温升至41.1℃。染虫率达到0.125%,之后逐渐下降。无菌采集该羊血液,提取全血基因组,用梨形虫通用引物进行PCR扩增全长18SrRNA基因,得到长约1 700bp的片段,将其克隆并测序(登录号:HQ730762),与GenBank中的其他巴贝斯虫的序列进行比较,发现其与新疆巴贝斯虫未定种的同源性最高,达到99.8%。本研究发现甘肃敦煌又是一个新疆羊巴贝斯虫未定种的疫源地。     

SPE/UPLC法检测血中吗啡、苯丙胺类及氯胺酮

目的建立SPE/UPLC方法在同一条件下同时检测血中吗啡、苯丙胺类及氯胺酮。方法采用SCX 3cc（60mg）固相萃取柱萃取血中吗啡、MA、MDMA、MDA及氯胺酮,用超高效液相色谱（UPLC）-二极管阵列检测器（PDA）检测,结合保留时间和紫外光谱进行定性、定量分析,对实验各环节进行优化,并进行实际案例检测。结果吗啡、MA、MDMA、MDA、氯胺酮的固相萃取提取回收率分别为81.4%±2.51%、88.2%±2.48%、91.8%±2.03%、93.8%±1.46%、74.8%±2.27%,峰面积和质量浓度的线性关系良好（r〉0.999）,线性范围分别为0.08～100μg/mL、0.4～100μg/mL、0.2～75μg/mL、0.3～75μg/mL、0.4～100μg/mL,检出限分别为30pg、200pg、80pg、100pg、200pg。结论本文所建方法适用于血中吗啡、苯丙胺类、氯胺酮常见毒品的筛选及定量分析。