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McAvoy Y Bäckström B Janhunen K Stewart A Cole MD 《Forensic science international》1999,99(2):107-122
The application of supercritical fluid chromatography (SFC) in forensic science is reviewed. The applications centre on the analysis of explosives and of drugs of abuse. The systems employed are discussed in the context of comparison with gas chromatography and high-performance liquid chromatography methods which are traditionally used for such analyses. The advantages and disadvantages of SFC over these methods are discussed. Recommendations are made for the developments which are required in SFC technology if it is to find greater application in forensic science. 相似文献
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This case report demonstrates a rape case, where no semen, hair, or fingerprints were left by the perpetrator at the crime scene, but rather uncharacteristic biological and physical evidence in the form of a lollipop and a pair of glasses. Three separate forensic laboratories collaborated using conventional forensic methods of PCR DNA typing, photography, and toolmark comparisons to provide investigators with scientific evidence which in turn was instrumental in bringing a violent criminal to justice. The importance of evaluating each item of evidence and realizing its forensic value is stressed in this case report. 相似文献
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The analysis of trauma to the skeleton is an important aspect of forensic case work, but most pathology references devote limited attention to this topic. This paper describes various aspects of gunshot wounds, including entrance and exit patterns, angle and path, range of fire and velocity, and caliber of the bullet, based on observations of a series of known cases. Skeletal remains of 21 victims of gunshot wounds were studied. In most cases, there was documentation of the investigation, autopsy, and victim's identity. Each case was analyzed in terms of wound location, shape, size and exit/entry surface area ratio, beveling, and direction of shooting Skull entry wounds were most often round or oval. Unusual shapes were observed in bones like the mandible and mastoid process, but were also found to be triangular, nearly rectangular or irregular. Tunneling was observed in the mastoid process. The expected internal beveling was obvious in all but one skull. External beveling of an entry wound was only observed in one case (parietal bone). Exit wounds were roughly round, oval, square, and rectangular and were always more irregular than entry wounds. External beveling of exit wounds was observed in most vault bones, but there was none in the orbit, maxilla, greater wing of the sphenoid, temporal, or left occipital bone. Tangential gunshot wounds were seen in a mastoid process, zygomatic process, mandibular ramus and condyle, and occipital condyle. Most of the exit to entry surface area ratios (cm2) varied from 1.4 to 2.0. In four cases the ratio indicated that entrances were larger than exists. In conclusion, understanding of gunshot wound characteristics is an important matter to interpret distance, velocity, direction and sometimes caliber size. Assessment of this nature of gunshot wounds helps reconstruct events surrounding the death. 相似文献
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人类D19S40基因座在不同人种中的遗传多态性研究 总被引:1,自引:0,他引:1
采用PCR技术分析中国汉族、德国人、斯洛伐克人和美国黑人群体D19S400基因座的遗传多态性及世界三大人种之间的差异。四个群体共调查了620人,发现了11个等位基因,观察到47种基因型。各群体观察杂合度为:0.78~0.88,个人识别机率为:0.93850~0.9664。四个群体基因型频率分布符合Hardy-Weinberg平衡(P>0.05),三大人种(蒙古人种、高加索人种、美国黑人)之间D19S400基因座等位基因频率分布存在极显著差异(P<0.01)。结果显示D19S400基因座在群体遗传学研究和法医学个人识别中有较高应用价值 相似文献
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