Ninhydrin Test | Lab Tests Guide
Ninhydrin Test | Lab Tests Guide
Dec 13, 2019
labtestsguide.com
Who knew those ironing skills would come in handy in the Cyber & Forensics Bureau! 😆 One method to getting fingerprints from porous items like paper is using the chemical ninhydrin, which reacts with the amino acids present in fingerprint residue. To use this method, detectives spray ninhydrin on the item, where it turns a bright purple! They then put it under a hood to let it dry. Then, the iron comes into play. Very carefully (and slowly), they allow the steam from the iron to heat the paper,
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The ninhydrin sweat test evaluates for injuries to the median nerve. The patient presses their palm against paper treated with ninhydrin solution. Ninhydrin reacts with amino acids in sweat, producing a blue-purple color change that reflects normal sweat gland activity. A positive test is indicated by reduced or absent color change in the median nerve distribution. Sensitivity and specificity are unknown. Read: https://wikism.org/Ninhydrin_Sweat_Test Watch: https://www.youtube.com/watch?v=rCIvHK
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