essam_abdallah

Esam Mohamed Abdalla Ali

Lecturer - PhD

Faculty of medicine

Address: Tahta - Sohag

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Publications Which contain the keyword: forensic


In-situ detection of drugs-of-abuse on clothing using confocal Raman microscopy
This study describes the application of confocal Raman microscopy to the detection and identification of drugs-of-abuse in situ on undyed natural synthetic fibres, and coloured textile specimens. Raman spectra were obtained from drug particles trapped between the fibres of the specimens. Pure samples of cocaine hydrochloride and N-methyl-3,4-methylenedioxy-amphetamine HCl (MDMA-HCl) were used in this study. Raman spectra were collected from ... Read more

Detection of explosives on human nail using confocal Raman microscopy
Trace amounts of explosives were detected on human nail using confocal Raman microscopy. Contamination of the nail can result from the manual handling, packaging or transportation of explosive substances. Raman spectra were obtained from pentaerythritol tetranitrate (PETN), trinitrotoluene (TNT), ammonium nitrate and hexamethylenetetramine (HMTA) particles on the surface of the nail with dimensions in the range 5–10 µm. An added ... Read more

Raman spectroscopy and security applications: the detection of explosives and precursors on clothing
This study describes the application of confocal Raman microscopy to the detection and identification of explosives and their precursors _in situ_ on undyed natural and synthetic fibres and coloured textile specimens. Raman spectra were obtained from explosives particles trapped between the fibres of the specimens. The explosives pentaerythritol tetranitrate (PETN), trinitrotoluene (TNT), and ammonium nitrate as well as the explosives ... Read more

Forensic and security applications of a longwavelength dispersive Raman system
A novel dispersive system operating at 1064-nmexcitation and coupled with transfer electron InGaAs photocathode and electron bombardment CCD technology has been evaluated for the analysis of drugs of abuse and explosives. By employing near-IR excitation at 1064-nm excitation wavelength has resulted in a significant damping of the fluorescence emission compared to 785-nm wavelength excitation. Spectra of street samples of drugs ... Read more

In situ detection of cocaine hydrochloride in clothing impregnated with the drug using benchtop and portable Raman spectroscopy
This study describes the application of benchtop and portable Raman spectroscopy for the _in situ_ detection of cocaine hydrochloride in clothing impregnated with the drug. Raman spectra were obtained from a set of undyed natural and synthetic fibres and dyed textiles impregnated with the drug. The spectra were collected using three Raman spectrometers: one benchtop dispersive spectrometer coupled to a ... Read more

2018-10-28 11:32:29 Keywords textiles, confocal Raman microscopy, explosives, forensic,
In-situ detection of single particles of explosive on clothing with confocal Raman microscopy.
Confocal Raman microscopy is shown to detect picogram quantities of explosives in-situ on undyed natural and synthetic fibres, and coloured textile specimens leaving potentially evidential materials unaltered. Raman spectra were obtained from pentaerythritol tetranitrate (PETN), trinitrotoluene (TNT), and ammonium nitrate particles trapped between the fibres of the specimens. Despite the presence of spectral bands arising from the natural and synthetic ... Read more

2018-10-29 06:30:03 Keywords forensic, applications, Raman spectroscopy,
Raman Spectroscopy: an aid to forensic and crime scene analysis
A field-portable Raman spectrometer is a reliable technique that can be used by emergency response teams to rapidly identify unknown samples. The portability and rapidity of the analysis are significant advantages. These criteria are significantly important for law enforcement agencies working in the field and dealing with relatively large numbers of samples on a daily basis. Read more

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