著者

岩本 良二 太田 奈穂樹 相場 伸 村川 雄大 棟方 栄治

出版者

日本法科学技術学会

雑誌

日本鑑識科学技術学会誌 (ISSN:13428713)

巻号頁・発行日

vol.6, no.2, pp.99-108, 2002 (Released:2009-10-14)

参考文献数

24

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This paper presents a study of the intra-individual variation of pubic hairs. Seventy pubic hairs were pulled from seven sites around the outer genital area of each of five Japanese males; sixty were obtained from six sites on each of four Japanese females, and fifty from six sites on one additional Japanese female. These hairs were examined with respect to twenty-two morphological characteristics. These morphological data were studied in relation to each site and analyzed by the statistical method of cluster analysis.   It appeared that a pubic hair's length, luster, diameter, medullary index, disease and scale damage bore some relation to the site from which it was obtained. Dendrograms produced through the cluster analysis showed a hierarchy of similarities among all pairs of pubic hairs. Similar hairs were placed together into several large or small groups within the same person. Some groups contained pubic hairs from many sites, whereas others were almost exclusively from only one site. This means that some sites have different characteristics from other sites. Pubic hairs obtained from the penis area, scrotum and labium majus area showed greater dissimilarity than other sites within the same person.   Therefore, in forensic hair comparison, known pubic hair samples should be obtained from many different sites. For males, at least thirty-five pubic hairs should be collected from seven sites (center, left and right abdomen; upper, left and right area surrounding the penis; and scrotum). For females, at least thirty pubic hairs should be collected from six sites (center, left and right abdomen; mons pubis; left and right labium majus).

著者

岩本 良二 太田 奈穂樹 相場 伸 村川 雄大 棟方 栄治

出版者

Japanese Association of Forensic Science and Technology

雑誌

日本鑑識科学技術学会誌 (ISSN:13428713)

巻号頁・発行日

vol.6, no.2, pp.99-108, 2002

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This paper presents a study of the intra-individual variation of pubic hairs. Seventy pubic hairs were pulled from seven sites around the outer genital area of each of five Japanese males; sixty were obtained from six sites on each of four Japanese females, and fifty from six sites on one additional Japanese female. These hairs were examined with respect to twenty-two morphological characteristics. These morphological data were studied in relation to each site and analyzed by the statistical method of cluster analysis.<br>   It appeared that a pubic hair's length, luster, diameter, medullary index, disease and scale damage bore some relation to the site from which it was obtained. Dendrograms produced through the cluster analysis showed a hierarchy of similarities among all pairs of pubic hairs. Similar hairs were placed together into several large or small groups within the same person. Some groups contained pubic hairs from many sites, whereas others were almost exclusively from only one site. This means that some sites have different characteristics from other sites. Pubic hairs obtained from the penis area, scrotum and labium majus area showed greater dissimilarity than other sites within the same person.<br>   Therefore, in forensic hair comparison, known pubic hair samples should be obtained from many different sites. For males, at least thirty-five pubic hairs should be collected from seven sites (center, left and right abdomen; upper, left and right area surrounding the penis; and scrotum). For females, at least thirty pubic hairs should be collected from six sites (center, left and right abdomen; mons pubis; left and right labium majus).<br>

著者

太田 奈穂樹 岩本 良二 相場 伸 村川 雄大 棟方 栄治 川口 龍一

出版者

日本法科学技術学会

雑誌

日本鑑識科学技術学会誌 (ISSN:13428713)

巻号頁・発行日

vol.9, no.2, pp.95-102, 2004 (Released:2007-11-07)

参考文献数

8

被引用文献数

1

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In a recent murder case, many feathers were left at the crime scene and collected for analysis. It seemed they were likely left from the suspect's torn jacket. Goose and duck downs are commonly used for clothes and bedclothes, especially in high quality goods where goose feathers are used most often. Unfortunately, at the time of the murder there were few studies in Japan about down identification. This paper presents how to identify goose and duck downs by microscopy.   Ten downs were removed at random from each stuffed bird from sixty-one species at the prefectural museum. Ten downs were removed at random from ten geese and ten ducks, respectively, at the prefectural farm. Therefore, the authentic sample set (family or species known) included ten downs each from eighty-one birds, representing sixty-three species. In addition, two hundred goose downs and two hundred duck downs were obtained from samples supplied by the Japan Spinners Inspecting Foundation in Tokyo.   These down samples were examined microscopically with respect to eight morphological characteristics: full length, color, node shape, maximum node width, maximum node interval, node distribution, node density (number of nodes per mm) and pigment distribution. Morphological data from geese were compared with ducks and analyzed statistically using F-test.   Duck and goose downs are identified primarily by their triangular nodes. In birds of the sixty-three species other than those from the duck and geese species, triangular nodes were found only in the Anatidae, Columbidae and Psittacidae families. Fortunately, it was quite simple to distinguish the families by the node distribution along the shaft of the barbules. For example, the Anatidae family has triangular nodes only toward the tip of the barbule, the Columbidae family has them mainly toward the base of the barbule, and the Psittacidae family has them uniformly distributed along the shaft of the barbule. Based on feather nodes, both goose and duck can be placed in the Anatidae family. Nevertheless, they can be distinguished. Goose has wider maximum node intervals than the duck, usually more than fifty-five micrometers. On the other hand, duck has higher node density than the goose, more than sixteen per mm. Statistical analysis using the F-test showed that the maximum node interval and node density were useful characteristics for distinguishing a goose from a duck down.