鉴定室外环境中尸体的气味从死前到死后的转变

Q1 Social Sciences
Darshil Patel , Wesley S. Burr , Benoit Daoust , Shari Forbes
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引用次数: 0

摘要

本研究调查了在室外环境中,人类尸体早期死后气味从死前到死后气味的转变。将3具尸体(供体)放置在室外人体分解设施中,采用热解吸结合综合二维气相色谱-飞行时间质谱(TD-GC × GC-TOFMS)对挥发性有机化合物(VOCs)进行收集和分析。关键发现表明,在酶和细菌活性的驱动下,含氮化合物在早期死后VOC谱中占主导地位。酯类、醇类和卤化化合物也被鉴定出来,其中酯类与微生物转化有关,醇类可能由脂质过氧化形成。受皮肤微生物群和紫外线辐射等环境因素的影响,死前挥发性有机化合物在样品中持续存在,使分解气味的检测复杂化。在ADD 73.4(实验第3天)后,死后挥发性有机化合物变得更加突出,表明尸体进入了膨胀分解阶段。样品采集方法的变化和温度等外部因素会影响VOC丰度。这项研究为气味转换提供了重要的见解,并对搜索和救援(SAR)和人类遗骸探测(HRD)犬的使用具有重要意义。需要进一步的研究来标准化方法并评估不同环境和季节的气味转换。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Identifying the transition from ante-mortem to post-mortem odor in cadavers in an outdoor environment
This study investigates the transition from ante-mortem to post-mortem odor in human remains during the early post-mortem period in an outdoor environment. Three cadavers (donors) were placed at an outdoor human decomposition facility, and volatile organic compounds (VOCs) were collected and analyzed using thermal desorption coupled with comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (TD-GC × GC-TOFMS). The key findings revealed that nitrogen-containing compounds were predominant in early post-mortem VOC profiles, driven by enzymatic and bacterial activity. Esters, alcohols, and halogenated compounds were also identified, with esters linked to microbial transformation and alcohols possibly formed by lipid peroxidation. Ante-mortem VOCs were persistent across samples, influenced by skin microbiota and environmental factors like UV radiation, complicating the detection of decomposition odor. Post-mortem VOCs became more prominent after ADD 73.4(experimental day 3), signaling the transition to the bloat stage of decomposition. Variations in sample collection methods and external factors such as temperature were found to affect VOC abundances. This study provides critical insights into odor transition and has implications for the use of search and rescue (SAR) and human remains detection (HRD) dogs. Further research is needed to standardize methods and assess odor transitions across diverse environments and seasons.
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来源期刊
CiteScore
4.90
自引率
0.00%
发文量
75
审稿时长
90 days
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