Richard Adam H, Hietpas Jack, Buscaglia JoAnn, Monson Keith L
Laboratory Division, Federal Bureau of Investigation, 4940 Fowler Road, Redstone Arsenal, Huntsville, AL, 35898.
Department of Biochemistry & Molecular Biology, The Pennsylvania State University, University Park, PA, 16802.
J Forensic Sci. 2019 Jan;64(1):98-107. doi: 10.1111/1556-4029.13810. Epub 2018 May 9.
A study was undertaken using nonhuman mammal specimens to better understand environmental influences on postmortem hair root band (PMRB) formation and to see whether PMRBs would occur in nonhuman mammal hairs in a similar fashion to human hairs. Carcasses from surrounding roadways were the primary source of specimens for this study, augmented by donated deceased domestic pets. Sections of pelt from each specimen were placed in controlled environmental conditions while the remainder of the carcass was left in a secure outdoor setting. Hair samples were collected daily from outdoor and control specimens and examined for evidence of PMRBs. Several environmental factors were also recorded on a daily basis. Results demonstrate PMRBs can occur in nonhuman mammal hairs, and they have microscopic characteristics similar to human PMRBs. Factors found to correlate with PMRB formation include postmortem interval, temperature, pH, and the formation and subsequent volatilization of ammonia from the surrounding tissue.
为了更好地理解环境对死后毛根带（PMRB）形成的影响，并观察PMRB是否会以与人类毛发相似的方式出现在非人类哺乳动物毛发中，开展了一项使用非人类哺乳动物标本的研究。来自周边道路的尸体是本研究标本的主要来源，捐赠的已故家养宠物也补充了标本。将每个标本的皮张切片置于可控环境条件下，而尸体的其余部分则留在安全的户外环境中。每天从户外和对照标本中采集毛发样本，并检查是否有PMRB的迹象。还每天记录几个环境因素。结果表明，PMRB可出现在非人类哺乳动物毛发中，并且它们具有与人类PMRB相似的微观特征。发现与PMRB形成相关的因素包括死后间隔、温度、pH值以及周围组织中氨的形成和随后的挥发。
