猪传染性胸膜肺炎重组亚单位疫苗保护效果的评价及其免疫机制的研究

分别表达了rApxⅠr、ApxⅡr、ApxⅢ、rApxⅣr、Apfa和rOMP 6种重组蛋白,以不同组合分组免疫小鼠,分别以APP1型菌(5×109CFU)和APP7型菌(1×1011CFU)进行攻毒。结果显示,试验Ⅱ组(rApxⅠ rApxⅡ rApxⅢ rOMP)的APXⅠ抗体水平、细胞免疫水平及对APP1和APP7型菌的保护效果均显著高于其他各试验组及对照组;试验Ⅰ组(灭活疫苗)、Ⅲ组(rApxⅠ rApxⅡ rApxⅢ rApxⅣ)、Ⅳ组(rApxⅠ rApxⅡ rApxⅢ rApfa)与对照组差异显著,但均显著低于试验Ⅱ组;APXⅠ抗体水平和细胞免疫水平与攻毒保护率呈正相关。证实rApxⅠ rApxⅡ rApxⅢ rOMP组免疫效果最好,可对2个血清型APP的攻击提供有效保护。     

吸毒者毛发中苯环己哌啶的串联质谱分析

应用串联质谱方法分析吸毒者毛发中苯环己哌啶(phencyclidine,PCP)国内尚未见报道。在整个分析过程中,不需要用溶剂将PCP从毛发中提取出来。从PCP吸毒者毛发中只检测到PCP,没有检测出其代谢产物。被动吸收试验发现毛发可从水溶液中紧密吸收PCP,这类似于身体对PCP的结合。检测结果表明:PCP可被非吸毒者的毛发吸收,且较为稳定。     

用五氟苄基溴对五氯酚进行衍生化的方法

目的五氟苄基溴(PFBBr)衍生化试剂对五氯酚进行衍生化研究。方法运用GC/MS、GC/ECD印证分析衍生化产物。结果改变了五氯酚的挥发性,提高检测灵敏度,在本文控制的实验条件下,五氯酚-PFBBr衍生物的检测限可达1pg。结论为检测微量五氯酚提供了一种有效手段。     

Phencyclidine: a 5-year retrospective review from the New York City Medical Examiner's Office

We report here a 5-year retrospective review of autopsy cases from the New York City Medical Examiner's Office that demonstrated phencyclidine (PCP) in the blood. There were a total of 138 cases. There were 52 deaths because of mixed drug intoxication: the blood PCP concentrations in these cases ranged from <1 to 598 ng/mL. There were 80 violent deaths in which PCP was quantified in the blood but was unrelated to the cause of death. There were five nonviolent deaths in which PCP exclusively was detected. In four of these, there were preexisting medical conditions that could also have contributed to death. In these, the highest PCP concentration was 361.3 ng/mL, a concentration lower than seven of the individuals in our violent death category. This suggests that lower concentrations may be fatal with comorbid conditions.