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08:51 Apr 21, 2016 |
Swedish to English translations [PRO] Tech/Engineering - Chemistry; Chem Sci/Eng | |||||||
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| Selected response from: Edith van der Have Netherlands Local time: 10:09 | ||||||
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Summary of answers provided | ||||
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3 | stub method |
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stub method Explanation: Med 'stub method' kan man samla sk gunshot residue (GSR), som sedan kan analyseras på labbet. Since 1933 several collection and analysis methods relating to GSR have been employed. This post focuses on analysis using scanning electron microscopy coupled with X-ray spectroscopy (SEM/EDX) which is the contemporary method; therefore only the manner of collecting GSR to allow for that means of analysis is presented. The most popular method of collection is lifting micro-traces from a substrate upon which GSR has been deposited by multiple pressings of adhesive material until the tackiness of the adhesive has gone. The adhesive material is attached to the head (smooth and flat) surface of a SEM stub as that does not require carbon coating, one that is polished smooth and flat, and does not contain elements of high atomic number. Both skin and clothing are suitable for the stub method of collection. Specifically, in relation to the hands of the shooter one stub is pressed along the thumb and forefinger and a second along the palm of each hand (resulting in four stubs). Reference: http://forensic-review.com.au/gunshot-residue/ |
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