大鼠肝细胞DNA含量与早期死亡时间关系的图像分析研究

实验选择 15只大鼠 ,处死后 ,在 2 4h内 ,每隔 1h取肝组织块进行细胞学涂片、福尔马林液固定、Feul gen染色、自动图像分析仪测量、统计学处理数据。结果表明 ,肝细胞DNA含量在死后 2 4h内 ,随死亡时间的延长而较有规律的下降。其中积分光密度、平均光密度、异形指数是用来研究死亡 2 4h内肝细胞DNA降解规律 ,并准确推断死亡时间的较好指标。     

损伤对培养人胎肺FBs分泌Fn的影响及与损伤时间的关系

为了探讨损伤对FBs分泌Fn的影响及与损伤时间的关系 ,在本室建立的体外培养人FBs损伤模型的基础上 ,应用酶联免疫组织化学检测技术 (双抗体夹心法ELISA)对损伤后不同时间培养液中Fn的含量变化进行检测 ,结果表明 :伤后培养人胎肺FBs合成分泌的cFn的量 ,在伤后6h内与损伤时间呈正相关。     

“中国罪犯DNA数据库“模式库:13个STR位点基因在中国人群中的分布

目的:对D3S1358、vWA、FGA、D8S1179、D21S11、D18S51、D5S818、D13S317、D16S539、THO1、TPOX、CSF1PO、D7S820等13个STR位点进行多态性调查,探索其用于"罪犯DNA数据库"的可行性.方法:用多重PCR和四色荧光自动化检测技术分析13个STR位点的基因型,计算各位点等位基因的分布频率.结果:获得13个STR位点在中国南北汉族、维吾尔族、回族人群中的等位基因分布频率资料.结论:上述位点适合作为中国人群的遗传学标志,用于"中国罪犯DNA数据库"的建立.     

Precarity,Cognitive (Non-)Resistance and the Conservative Working Class in China

ABSTRACT

Workers’ resistance is crucial to understanding how the working class respond to the growing labour precarity in post-socialist China. The labour studies literature posits that inequality and volatile capital movements increase workers’ precarity and lead to stronger labour resistance, such as strikes. However, workers’ cognition as an integral part of resistance has been rarely studied. This article examines cognitive resistance by Chinese workers from different tier cities by looking at their social trust, class identity, understanding of policies and class solidarity. Despite capital movements and precarity causing more labour unrest, it does not necessarily lead to a stronger cognitive resistance. While inequality and precarity are greater in the more developed megacities with a shifting capital favourability, workers in megacities display a more conservative cognitive resistance than those from the lower-tier cities. This study of workers’ cognitive resistance provides insight into the future of the Chinese labour movement. It argues that the working class’s current cognitive non-resistance suggests that even if a window of opportunity were to appear in the wall of state oppression, workers are not cognitively prepared to coalesce into a coherent social movement that would bring about transformative changes.     

A fatal chronic ketamine poisoning

A few papers in the literature reported incident deaths by acute ketamine poisoning. In this paper, we report an unusual homicide caused by chronic ketamine poisoning. The victim was a 34-year old married woman with no previous medical history (except as reported herein) who died in her own home. The court investigation revealed that she was chronically poisoned by her husband over a period of about one year in an act of homicide. Determination of ketamine concentrations in autopsy specimens was carried out with gas-chromatography/mass spectrometry (GC-MS). The results showed that ketamine concentration was 21 microg/mL in gastric contents, 3.8 microg/mL in blood and 1.2 microg/mL in urine. The most striking forensic findings were cardiac muscle fibrosis and hyaline degeneration of small arteries in victim's heart, the pathological features of ketamine poisoning previous reported only in animal studies.     

Development and evaluation of a standard method for the quantitative determination of elements in float glass samples by LA-ICP-MS

Forensic analysis of glass samples was performed in different laboratories within the NITE-CRIME (Natural Isotopes and Trace Elements in Criminalistics and Environmental Forensics) European Network, using a variety of Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) systems. The main objective of the interlaboratory tests was to cross-validate the different combinations of laser ablation systems with different ICP-MS instruments. A first study using widely available samples, such as the NIST SRM 610 and NIST SRM 612 reference glasses, led to deviations in the determined concentrations for trace elements amongst the laboratories up to 60%. Extensive discussion among the laboratories and the production of new glass reference standards (FGS 1 and FGS 2) established an improved analytical protocol, which was tested on a well-characterized float glass sample (FG 10-1 from the BKA Wiesbaden collection). Subsequently, interlaboratory tests produced improved results for nearly all elements with a deviation of < 10%, demonstrating that LA-ICP-MS can deliver absolute quantitative measurements on major, minor and trace elements in float glass samples for forensic and other purposes.