Muhammad Ashraf Tahir's research while affiliated with Punjab Forensic Science Agency and other places

Publications (10)

Article
Aim This case study will be beneficial for the forensic toxicology community for simultaneous detection of carbofuran, a pesticide and para-phenylenediamine (a hair dye locally known as black stone) along with their metabolites in analytically challenging samples like liver tissue and stomach contents. Introduction A 35 years old married woman was...
Article
Organic solvents are extensively used in manufacturing processes of pharmaceutical formulations that cannot be completely eliminated from the product due to physical and chemical barriers. These solvents have no therapeutic value and may be toxic to human body if intake exceeds the permitted daily exposure. Therefore, a simple and sensitive method...
Article
A rapid colorimetric method for detection of p-phenylenediamine (PPD) in various biological samples is developed. The o-cresol test for acetaminophen detection has been modified to detect PPD in blood, urine, gastric contents, and liver. After precipitating protein with trichloroacetic acid solution (2 mL, 10% w/v), biological specimens were requir...
Article
Full-text available
Methanol has a widespread commercial use as a solvent in paints, varnishes, anti-freeze solutions and denaturant for ethanol. Exposure may occur due to accidental, suicidal ingestion or as a result of consuming adulterated liquor. Fatalities were reported in Pakistan in an incident after consuming methanol-tainted liquor. Postmortem specimens of ei...
Article
A polygraph is an instrument that measures and records physiological changes inside the body. In the absence of a valid physical evidence, polygraphy may be a useful technique to verify truthfulness or detect deception. The present study was conducted to determine the truthfulness of a suspect in a murder case that was referred to PFSA for a polygr...
Conference Paper
Content Addressable Memory is a data storage device that is widely used in many applications. It is especially used in areas needing fast memory access. However, due to use of parallel based search approach and frequent charge and discharge of Match lines and Bit lines/ search lines; the power consumption of CAM is considerable. This paper presents...
Article
A dead body of middle aged man was exhumed from 6.5 month earth-grave. Autopsy findings were non-specific as the body was completely putrefied. Deceased’s scalp hair and kidney was sent for toxicological analysis. Hair sample (50 mg) was incubated with 1 M NaOH (2ml). Chloroquine was detected in hair and kidney during basic drug screen performed on...
Article
Fingermarks are one of the most useful forms of evidence in identification and can provide generalized proof of identity in crime investigation. They are developed using various conventional powders. The novel nanopowder ZnO-SiO2 was synthesized via the conventional heating method and characterized by Fourier transform infrared spectroscopy (FTIR),...

Citations

... Bloodstains are one of the most important type of evidence which can be found at a crime scene, and some indications and information could be extracted from them [14]. Bloodstain pattern analysis interprets the bloodstain patterns of a crime scene in order to draw conclusions to support the reconstruction of the crime scene [15]. ...
... (Katwala, 2019) Output from EyeDetect was accepted as evidence by some courts (Melendez, 2018), though many judges have been reluctant participants in this arena. I largely draw from US and UK examples in this article, but development of AI-enhanced lie detection technologies is growing in HR worldwide (Ayoub, 2018;Bergers, 2018). Alder (2009) writes of the "obsession" of the US with lie detection devices, but it is a passion increasingly shared with other nations, including China, which originally resisted the proliferation of lie detection technology (Zhang, 2011), and Germany (Fischer, 2020). ...
... Adulteration also includes the use of ethylene glycol and methanol to raise the alcohol level and improve the taste of alcohol [13][14][15][16]. Despite the detection techniques of adulterants in alcohol, adulteration has remained a concern on local, national, and international scales [17][18][19][20][21][22]. The adulteration is done to decrease the production cost and increase the quantity of alcohol, it can be done in two ways, either by changing the concentration or by adding a substance like methanol. ...
... Due to its high speed comparison, CAMs can be used in a number of applications such as face recognition [14], matching and classification of any pattern [11], Internet of Things, database management, network routing [6], cache memory in processors, data encryption, data compression [13], positioning system, ethernet address lookup, secure biometric authentication, artificial intelligence, and graph equality search [3], etc. Due to shortcomings like high cost per bit, , high power consumption and unavailability of hard IP native CAM in fieldprogrammable gate arrays (FPGAs), forced the researchers to find an alternative way for fine solution over the ASIC based CAMs. Therefore, for better performance FPGA based CAMs are a better alternative as compared to ASIC based CAMs.FPGA based CAMs can be classified into the following three types; ...
... Scientific literature describes several methods for identification and quantification of chloroquine. High-performance liquid chromatography (HPLC) [36][37][38] and gas chromatography [39][40][41] are commonly used to separate contaminants and increase sensitivity of chloroquine analysis in pharmaceutical and biological samples. Ultraviolet spectrophotometry [42][43][44][45][46][47][48], spectrofluorimetry [42,49], chemiluminescence [39], nuclear magnetic resonance [50,51] and immunoassay [52], and capillary electrophoresis [53] are also used for chloroquine analysis. ...
... Since Menzel and his co-workers firstly introduced CdS quantum dots to latent fingerprint development on metallic and sticky surfaces in 2000, [1] nanotechnology has played an increasingly important role in forensic science due to high developing sensitivity derived from the nanoscale as well as high developing selectivity derived from the versatility of surface modification. [2][3][4][5] To this end, a mass of nanoparticles was reported as fingerprint developers, [6][7][8][9][10] such as iron, titanium, europium, cobalt and silicon oxides or their alloys. In addition, during the last decade, a variety of nanophosphors, including semiconducting metal/polymer dots, [11][12] organic aggregate luminogens, [13][14][15] rare earth-based powders, [16][17][18][19][20][21] metal-organic frameworks, [22][23][24] fluorescent carbon dots, [25][26][27][28][29][30][31][32][33] noble metal nanoclusters [34][35][36][37] and perovskite nanocrystals [38][39][40] have gradually become the mainstream for fingerprint development applications. ...