Lipidic compounds found in soils surrounding human decomposing bodies and its use in forensic investigations – A narrative review

Following decomposition of a human body, a variety of decomposition products, such as lipids, are released into the surrounding environment, e.g. soils. The long-lasting preservation in soils and their high diagnostic potential have been neglected in forensic research. Furthermore, little is known about the preservation, chemical transformation, or degradation of those human derived lipids in soils. To date, several studies identified various lipids such as long-chain free fatty acids and steroids in soils that contained decomposition fluids. Those lipids are preserved in soils over time and could serve as markers of human decomposition in forensic investigations, e.g. for estimating the post-mortem interval or identifying the burial location of a human body. Therefore, this review focuses on the current literature regarding fatty acid and steroid that have been detected in soils and associated with human body decomposition. After a short introduction about human decomposition processes, this review summarises fatty acid and steroid analysis applied in current case studies and studies related to taphonomic research. This review provides an overview of the available studies that have used fatty acids and steroids as identifiers of human decomposition fluid in soils in a forensic context and discusses the potential for developing this innovative field of research with direct application in a forensic context.     

中西医结合治疗甲型H1N1流感26例

目的 观察痰热清注射液联合奥司他韦治疗甲型H1N1流感的临床疗效.方法 将确诊的50例甲型H1N1流感患者随机分为治疗组与对照组,两组均采用奥司他韦抗病毒治疗,治疗组加用痰热清注射液静脉滴注,治疗3～10 d.观察并比较两组咳嗽消失时间及临床疗效.结果 治疗组和对照组总有效率分别为80.77%、54.17%,两组临床总...     

高效液相色谱法测定山核桃外蒲壳中4,8-二羟基-1-四氢萘酮的含量

目的 采用高效液相色谱法（high performance liquid chromatography, HPLC）测定山核桃外蒲壳中4,8-二羟基-1-四氢萘酮的含量。方法 采用HPLC，色谱柱为Shim-pack 18 (250 mm×4.6 mm,5 μm)，以甲醇-水-(40∶60)为流动相，流速为0.8 ml/min，检测波长为333 nm，柱温为25 ℃。结果 4,8-二羟基-1-四氢萘酮在1.13～20.34 μg/ml范围内与峰面积呈良好线性关系，r=0.999 9，平均回收率为101.8%，相对标准偏差为1.21%(n=6)。结论 所建立的HPLC准确可靠、结果稳定、重现性好，可用于山核桃外蒲壳4,8-二羟基-1-四氢萘酮的含量测定。