墨西哥瓦哈卡州饮用水中的氧同位素变化及其对法医溯源工作的影响

IF 1.9 4区 医学 Q2 MEDICINE, LEGAL
Taylor Lambrigger
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引用次数: 0

摘要

近几十年来,法医人类学家一直在使用氧同位素分析(δ18O),因为它能够根据身体组织的同位素组成来帮助估计身份不明的个体的可能起源区域。先前的研究发现,饮用水具有地理模式,在评估人体组织与地理之间的联系时,自来水通常是饮用水的代表。研究人员已经开始在各种全球背景下应用这种方法。本研究批判性地评估了墨西哥瓦哈卡州自来水同位素代表饮用水的假设。分析了来自瓦哈卡州的饮用水样品,并将其与先前构建的墨西哥自来水等温线的预测δ18O值进行了比较。瓦哈卡州的头发样本也进行了分析,以与各种水源进行比较。在墨西哥瓦哈卡采样地区,自来水δ18O值不能可靠地反映饮用水δ18O。此外,将头发角蛋白与饮用水联系起来的模型,建立在这一假设之上,没有预测能力。由于对自来水在同位素上代表饮用水的能力了解不完全,研究人员需要研究其他关键因素在δ18O值中的作用。如果被鉴定为δ18O的个体来自非西方社区,由于该方法的假设,法医从业者有可能错误地预测起源地区。认识到社区法医从业者寻求援助的不同社会文化现实是至关重要的,因为我们成长和发展我们的方法向前发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Oxygen isotope variation in drinking water in Oaxaca, Mexico and its implications for forensic provenancing efforts

Forensic anthropologists have used oxygen isotopic analyses (δ18O) in recent decades because of its ability to help estimate probable regions of origin of unidentified individuals based on isotopic composition of bodily tissues. Prior research has found that drinking water is geographically patterned and that tap water is often representative of drinking water in assessing these links between human tissues and geography. Researchers have begun applying the method in a variety of global contexts. This research critically assesses the assumption that tap water is isotopically representative of drinking water in Oaxaca, Mexico. Drinking water samples from Oaxaca were analyzed and compared with predicted δ18O values from a previously constructed tap water isoscape of Mexico. Hair samples from Oaxaca were also analyzed to compare against various water sources. Tap water δ18O values do not reliably reflect drinking water δ18O in sampled regions of Oaxaca, Mexico. Further, the models relating hair keratin to drinking water, built on this assumption, fail to hold predictive power. With an incomplete understanding of tap water’s ability to represent drinking water isotopically, researchers need to study the role of other key factors in δ18O values. If the individual’s being identified with δ18O are from non-Western communities, forensic practitioners run the risk of incorrectly predicting region of origin because of the method’s assumptions. Recognizing the varying sociocultural realities of the communities forensic practitioners seek to aid is paramount as we grow and develop our methods moving forward.

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来源期刊
Science & Justice
Science & Justice 医学-病理学
CiteScore
4.20
自引率
15.80%
发文量
98
审稿时长
81 days
期刊介绍: Science & Justice provides a forum to promote communication and publication of original articles, reviews and correspondence on subjects that spark debates within the Forensic Science Community and the criminal justice sector. The journal provides a medium whereby all aspects of applying science to legal proceedings can be debated and progressed. Science & Justice is published six times a year, and will be of interest primarily to practising forensic scientists and their colleagues in related fields. It is chiefly concerned with the publication of formal scientific papers, in keeping with its international learned status, but will not accept any article describing experimentation on animals which does not meet strict ethical standards. Promote communication and informed debate within the Forensic Science Community and the criminal justice sector. To promote the publication of learned and original research findings from all areas of the forensic sciences and by so doing to advance the profession. To promote the publication of case based material by way of case reviews. To promote the publication of conference proceedings which are of interest to the forensic science community. To provide a medium whereby all aspects of applying science to legal proceedings can be debated and progressed. To appeal to all those with an interest in the forensic sciences.
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