A novel method for cyanide quantification in human whole blood using ion chromatography with amperometric detection and its application to cyanide intoxication cases

Cyanide is a highly toxic agent that has been frequently used for suicide in South Korea. It is also used in various industrial fields, such as metal plating, in which many accidental cyanide intoxications have occurred. To overcome the disadvantages of conventional cyanide analysis methods, a simple and fast method for the analysis of cyanide in whole blood using ion chromatography (IC) with amperometric detection was developed in this study. Whole blood samples were deproteinized, diluted, and analyzed using an IC–amperometric detection system. The limits of detection and quantitation were 0.1 and 0.2 mg/L, respectively. The method showed good linearity in the range of 0.2 to 50 mg/L with R² > 0.99. The intra- and inter-assay precision and accuracy values were <10%. The established method was successfully applied to analyze whole blood samples from three cyanide intoxication cases.     

中华鳖全血呼吸爆发化学发光检测方法的建立

为进一步研究中华鳖的先天免疫能力及其机理,以酵母多糖为吞噬底物,通过对鲁米诺浓度、全血稀释度和检测温度等条件的优化,建立了中华鳖全血呼吸爆发的化学发光检测方法,并用此方法对放置不同时间的全血和稀释血液进行了呼吸爆发检测效果的比较。结果表明,鲁米诺浓度为1×10-4mol/L,检测温度为31.5℃时,以0.4~0.8μL/mL的中华鳖全血进行检测可获得理想效果。保存6 d的全血仍可检测到呼吸爆发,稀释全血放置30 h后不再产生呼吸爆发。     

复合扩增mtDNA-HVI和Cyt b片段鉴定混合血痕种属

目的探讨mtDNA-HVI和Cyt b片段复合扩增法鉴定人与动物混合血痕种属的应用价值。方法用chelex-100法从人、牛、猪、狗、兔、鱼、鸡和鼠血痕中提取DNA,复合扩增mtDNA-HVI片段和Cyt b片段,琼脂糖凝胶电泳检测。结果人类在mtDNA-HVI区和Cyt b区分别出现279bp和358bp各一条带,且279bp条带亮于358bp;动物均只有358bp一条带。人与7种动物血痕的检测灵敏度均为3.13ng。检测人与动物混合DNA,灵敏度仍为3.13ng,但358bp条带亮于279bp条带。结论当358bp带明显强于279bp带时,提示检材为人与动物的混合。     

天舒胶囊联合西比灵治疗血瘀型偏头痛临床观察

目的 观察天舒胶囊联合西比灵治疗血瘀型偏头痛的临床疗效。方法 选择诊断为偏头痛患者60例,按序号奇偶数分成治疗组30例、对照组30例,治疗组采用天舒胶囊联合西比灵胶囊,对照组仅采用西比灵胶囊,疗程为30 d,疗程结束后1个月比较患者偏头痛积分、疼痛指数、证候积分及生活质量指数等变化。结果 两组患者偏头痛积分、疼痛指数、证候积分及生活质量指数均有显著改善,治疗组优于对照组（P<0.05）;两组患者偏头痛、疼痛、证候等疗效分布比较,差异均有统计学意义（P<0.05）,治疗组优于对照组。结论 天舒胶囊联合西比灵能显著改善血瘀型偏头痛患者的偏头痛积分、疼痛指数、证候积分及生活质量指数。     

The Stability of 4-Chloromethcathinone in Blood and Vitreous Humor

We present results of our study on the stability of 4-chloromethcathinone (4-CMC) in authentic postmortem peripheral blood and vitreous humor samples. The stability of 4-CMC was determined in postmortem blood samples (for a period of 90 days) and vitreous humor (30 days) at three different temperatures: −15°C, +4°C, and + 23°C. The analyses were carried out using ultra-high-performance liquid chromatography coupled with triple-quadrupole tandem mass spectrometry (UHPLC-QqQ-MS/MS). In both materials, the lowest 4-CMC stability was demonstrated at room temperature. The blood samples stored in a freezer (−15°C) showed stability for the entire study period (90 days), while in the case of the vitreous humor sample stored at the same temperature the concentration of the substance decreased by 53% after 30 days. The study carried out in authentic postmortem blood and vitreous humor samples confirms the previous reports of 4-CMC instability in biological material. Authors suggest that the biological material should be stored frozen until analyses are carried out as soon as possible after collection of the material.     

死后血浆和溶血样本中IgE的稳定性

目的 探究死后血浆和溶血样本中免疫球蛋白E(immunoglobulin E,IgE)经过不同保存条件及冻融处理后的稳定性.方法 选取39例死后48 h内非冷冻尸体的心血样本,其中20例取血浆样本,19例取全血制成溶血样本.将样本置于-20℃、4℃、25℃条件下保存28 d及-80℃条件下保存1年以探究IgE在不同保存...     

Volatile Organic Compound Profiling from Postmortem Microbes using Gas Chromatography–Mass Spectrometry

Volatile organic compounds (VOCs) are by-products of cadaveric decomposition and are responsible for the odor associated with decomposing remains. The direct link between VOC production and individual postmortem microbes has not been well characterized experimentally. The purpose of this study was to profile VOCs released from three postmortem bacterial isolates (Bacillus subtilis, Ignatzschineria indica, I. ureiclastica) using solid-phase microextraction arrow (SPME Arrow) and gas chromatography–mass spectrometry (GC-MS). Species were inoculated in headspace vials on Standard Nutrient Agar and monitored over 5 days at 24°C. Each species exhibited a different VOC profile that included common decomposition VOCs. VOCs exhibited upward or downward temporal trends over time. Ignatzschineria indica produced a large amount of dimethyldisulfide. Other compounds of interest included alcohols, aldehydes, aromatics, and ketones. This provides foundational data to link decomposition odor with specific postmortem microbes to improve understanding of underlying mechanisms for decomposition VOC production.     

胸膜肺炎放线杆菌感染对猪血液生化指标的影响

将24头健康DLY仔猪按性别、体重随机分为2组,采用鼻腔喷雾法分别接种生理盐水(对照组)和含3.8×107 CFU/mL胸膜肺炎放线杆菌(APP)的稀释液(试验组),研究了APP感染对猪血液生化指标的影响。血液生化指标由Airone-200RA全自动生化分析仪检测。结果显示,与对照组猪相比,试验组猪血清中TP含量略有升高(P>0.05),GLB含量极显著升高(P<0.01),ALB含量、A/G值极显著下降(P<0.01);ALT、AST活性升高,其中AST活性升高极显著(P<0.01),而LT/ST值下降显著(P<0.05);IBIL、TBIL浓度及IB/DB值极显著升高(P<0.01),DBIL浓度略有下降(P>0.05);BUN、CRE浓度均略有升高(P>0.05);GLU浓度、AKP活性极显著下降(P<0.01),Ca浓度及Ca/P值极显著下降(P<0.01),P浓度显著升高(P<0.05)。结果表明,胸膜肺炎放线杆菌感染引起了猪严重的肝功能代谢障碍,血糖和血钙显著下降,肾排泄负荷增加。     

中毒致死者体内芬氟拉明的GC/NPD,GC/MS法测定

建立了生物检材中芬氟拉明的定性定量分析方法。体液及脏器组织经有机溶剂提取后 ,用GC/MS法进行药物筛选、定性 ,生物检材中的芬氟拉明浓度用4 -苯丁胺作内标、GC/NPD法测定。测得芬氟拉明中毒致死者的血液、尿液、肝等组织中浓度分别为7.8μg/ml、64.2μg/ml、31.3μg/g。并对尸体解剖所见及方法可行性进行讨论     

批量陈旧血样DNA的自动化检验

目的建立批量陈旧血样DNA自动化提取检验的方法。方法采用普通磁珠法和本文建立的磁珠法经TECAN Freedom EVO150—8型自动化工作站分别提取540份陈旧血样模板DNA,采用Sinofiler^TM试剂盒进行荧光标记复合扩增。结果采用普通磁珠法和本文所建DNA提取方法,在540份样本中获得全部基因座STR分型的样本分别为217份和488份,检验成功率分别为40．2％和90．3％。结论本文所建方法可显著提高大批量陈旧血样自动化检验成功率。