Koch Sandra L, Michaud Amy L, Mikell Carmenza E
Federal Bureau of Investigation Laboratory, 2501 Investigation Parkway, Quantico, VA 22135, USA.
J Forensic Sci. 2013 Jan;58 Suppl 1:S52-9. doi: 10.1111/j.1556-4029.2012.02271.x. Epub 2012 Sep 26.
Although it has been generally accepted within the forensic hair community that decompositional changes in the form of an identifiable banding pattern can occur in the root area of hairs after death, little detailed information with regard to this phenomenon is known (e.g., rates at which this occurs and conditions that cause this banding). Hairs were collected daily from bodies placed in water, an air-conditioned environment, an enclosed vehicle, on the surface of the ground, and buried at the University of Tennessee Forensic Anthropology Center. The hairs were examined microscopically and the level of change documented for each environment. The onset of the banding was observed to have been delayed in water, air-conditioning, and cold weather and was hastened by warm weather and within the vehicle. This study provides validation that decomposition does produce varying effects on hair at the proximal portion of a hair root, including a dark band.
尽管在法医毛发学界已普遍接受这样的观点，即死后毛发根部区域会以可识别的条带模式形式发生分解变化，但关于这一现象的详细信息却知之甚少（例如，这种情况发生的速率以及导致这种条带的条件）。每天从田纳西大学法医人类学中心放置在水中、空调环境、封闭车辆、地面以及掩埋的尸体上收集毛发。对毛发进行显微镜检查，并记录每种环境下的变化程度。观察到条带的出现在水中、空调环境和寒冷天气下有所延迟，而在温暖天气和车辆内则会加速。这项研究证实了分解确实会对毛根近端的毛发产生不同影响，包括出现深色条带。
