Electron Microscopy in Forensic, Occupational, and by S. Basu (auth.), Samarendra Basu Ph.D., James R. Millette PDF

By S. Basu (auth.), Samarendra Basu Ph.D., James R. Millette Ph.D. (eds.)

ISBN-10: 1468452452

ISBN-13: 9781468452457

ISBN-10: 1468452479

ISBN-13: 9781468452471

Forensic, Occupational and Environmental future health Sciences are id sciences facing legal and mild societal difficulties for which scanning electron microscopy (SEM) with power dispersive x-rays (EDAX) and analytical transmission electron microscopy (TEM) are offering more and more definitive strategies. this can be quite real within the zone of particulates. although, electron microscopists operating independently in those 3 similar fields are usually referred to as upon to spot particulates that have been good characterised via microscopists in a single of the opposite fields of analysis. alternate of knowledge on particulate id and methods for examining new strange samples has been tough among the 3 disciplines. for instance, computerized seek and identity of particulates has develop into a customary strategy in environmental and occupational future health. The approach, besides the fact that, has but to discover its means into forensic laboratories for research of gunshot residue debris. This quantity represents a starting for collaboration and trade of rules among such components of research with diversified pursuits yet comparable analytical difficulties. it truly is nearly convinced that this attempt also will curiosity different electron microscopists in a few novel clinical issues of legal and societal relevance. the amount provides full-length articles of numerous invited audio system and contributors on the "Forensic, Occupational and Environmental health and wellbeing Sciences" Symposium held as part of the EMSA-MAS Joint Annual assembly, 5-9 August 1985, Louisville, Kentucky. prolonged 2-4 web page abstracts of those shows were released within the EMSA complaints (1985).

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Additional resources for Electron Microscopy in Forensic, Occupational, and Environmental Health Sciences

Sample text

The rate of incorporation of sulfur measured at the root of hair ("sulfur index") varies remarkably from one individual to another. Conventional microscopy test for hair comparison can be significantly aided with the uses of these elemental parameters examined in the SEM-EDX. IRTRODUCTION Forensic hair comparison requires parameters of obvious interpersonal specificity. Such parameters sh£uld not be confined to ha~r anomalies associated with certain diseases and cosmetic treatments. g. ) in scalp hairs is dependent on physiological status of body.

For all hairs examined this way, the intensity of S (~) was the lowest at the bulge of the root (or root tip) (Fig. 7). That is, the intensity of S (K~) continued to rise with distance (away) from the bulge of the root (cf. (s) 7 and 8). This observation was facilitated with combed (telogen) hairs which seldom contained overlying sheath cells at the root. (s) 7A and B. in tensity of S (Ko<) was rather sharp. Such changes occurred a short distance (50 - 100pm) away from the bulge of the root. Despite the irregularity of the hair surfaces at the root, the measured S (K~) intensities were comparable on two hairs of the same individual 32 Fig.

Changes in Cu-concentration) and irregular hair topography near the root (Fig. 3). {s} 4,5). {s} 4B and 5A). When the absorbed Cn-ions were present uniformly across the width of hair, the line scans due to S (K~) and Cu (K~) x rays were similar (Fig. 4A and B). These were round or dome-shaped (hemispherical) with a maximum intensity correspondin, to the middle of the width of hair. Examination of control hairs (no Cu +) showed that line scans of S (K~) across hair were also round or dome shaped.

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Electron Microscopy in Forensic, Occupational, and Environmental Health Sciences by S. Basu (auth.), Samarendra Basu Ph.D., James R. Millette Ph.D. (eds.)


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