New PDF release: Atlas of Human Hair: Microscopic Characteristics

By Robert R. Ogle Jr., Michelle J. Fox

ISBN-10: 0849381347

ISBN-13: 9780849381348

It fills a void within the assets on hand to researchers and practitioners in forensic hair exam via delivering photographic archetypes for the microscopic features of human hair and the variates of the features noticeable in forensic examinations, together with curl; colour; pigment distribution and density; cortical fusi; and ovoid our bodies. those illustrations offer a uniform foundation for describing the features and their diversifications for forensic execs in differing geographical parts. The documentation of hair features utilizing the scoring process defined during this atlas permits researchers to improve info concerning the frequency of features in the hairs of 1 or extra members and the overview of no matter if sure hair features are co-dependent.

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Extra resources for Atlas of Human Hair: Microscopic Characteristics

Sample text

1 Regional Shaft Diameter The diameter for African ancestry hair is smaller than that for the other two groups,29 but note that these highly curled hairs will lie on their side oriented with the smaller diameter of the flattened cross-section of the hair facing upward. That orientation will necessarily show the smaller of the two diameters in the view of the longitudinal mount. The regional hair shaft diameter for East Asian ancestry individuals is thicker than those of the other two regional groups.

Experimental data with regard to establishing the correlation coefficient for these two variates can be accomplished for study populations by a researcher. 14 Cortical Texture Cortical texture refers to the appearance of the cortex as viewed in a longitudinal mount. The variates for cortical texture are Absent, Present, and Obscured. Photographic archetypes illustrating each variate for cortical texture are presented in Chapter 5. The cortex may have no apparent texture (Absent), it may demonstrate a streaky texture (Present), or the ability to observe the cortical texture may be obstructed due to heavy pigmentation (Obscured).

22 Miscellaneous Characteristics Those miscellaneous characteristics listed in Chapter 3 are Double Medulla, Streaky Medulla, Gapping Pigment, Debris Present, Trailing Ovoid Bodies, and Other. The term Other is added to the list to allow the examiner to score ©1999 CRC Press LLC a miscellaneous characteristic not specifically listed here. 2 depict head hairs with Double Medullas. 3 illustrates a beard hair with a Streaky Medulla. 4 portrays a hair with Gapping Pigment. 5 illustrates a hair with Trailing Ovoid Bodies.

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Atlas of Human Hair: Microscopic Characteristics by Robert R. Ogle Jr., Michelle J. Fox


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