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Showing 1 to 9 of 9 for “"Latent Fingerprints"”.
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Evaluating the Ability of Different Weak Acids When Combined with Hydrogen Peroxide to Develop Latent Fingerprints on Post-Fired Cartridge Cases
… of different weak acids in developing fingerprints on different types of cartridge cases when combined with hydrogen peroxide due to a process known as chemical etching. Chemical etching involves an oxidation-reduction in which the metal is oxidized by the acid. Three types of cartridge …
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Several new methods for the development of latent and blood fingerprints
Several new methods for the development of latent and blood fingerprints have been investigated as well as a preliminary appraisal of a technique for the estimation of post-mortem interval and age of blood stains. The utilisation of coordinatively-unsaturated (six-coordinate) europium and terbium …
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Reagents for infrared chemical imaging of fingerprints on difficult surfaces
Fingerprints continue to be an important form of forensic evidence for individual identification. A number of techniques are currently available for the detection and enhancement of invisible or latent fingerprints. While these techniques perform well on many surfaces, there are a number of …
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Porphyrins and phthalocyanines as chemical visualisation reagents for latent fingerprint development
… as potential reagents for the development of latent fingerprints. Porphyrins and phthalocyanines are structurally related compounds which have many features in common, including the ability to substitute a wide variety of metal ions into the core of the macrocyclic ring, along with the ability …
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The immunodetection of cocaine for forensic applications.
… in extracts taken from both banknotes and latent fingerprints. The limit of detection (LOD) of 0.162 ng mL-1 achieved with the assay was comparable to that of conventional chromatography-mass spectroscopy techniques. When compared to LC-MS for the analysis of ten UK banknote samples, the …
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The Art of Fingerprint Spoofing
… user: biometrics. The first identification using fingerprints, in fact, dates back to the last years of the 1800s and was used by the police station for the criminal identification. From that moment on, the various biometric authentication systems based on fingerprints began to spread and, …
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The use of serface fuintionalised silica nano-particlate powders for the identification of gunshot residues from fingerprints
… be highly effective for the enhancement of the fingerprints [2]. Silica nano-particulates of defined size and shape were synthesised and functionalised with two different functional groups (phenyl and long chain hydrocarbon) using a Tri- phasic Reverse Emulsion (TPRE) method. These …
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Latent Fingerprint Enhancement on a Brass Metal Surface using Paint Electrodeposition
… is one the most successful methods of enhancing fingerprints from metallic surfaces. Despite the success of cyanoacrylate fuming, fingerprint recovery on fired cartridge casings is rarely successful. Therefore, a new fingerprint development method is needed to enhance fingerprint evidence that …
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The reliability of fingerprint pore area in personal identification
… of pore dimensions in inked reference fingerprints was investigated. Photomicrographs of reference prints were taken and pore area was measured repeatedly using appropriate software. Reproducibility of pore area was also studied in latent prints. Latent prints were deposited on chosen …