Electrical Pulse Generated Upon Discharging a Firearm and Its Implication for Gunshot Residue Analysis.

08:00 EDT 14th August 2019 | BioPortfolio

Summary of "Electrical Pulse Generated Upon Discharging a Firearm and Its Implication for Gunshot Residue Analysis."

Ammunition primers consisting of a mixture of lead styphnate, barium nitrate, and antimony (III) sulfide, upon deflagration, lead to the formation of inorganic gunshot residue (GSR). The cations, from their predeflagration form, undergo reduction reactions during burning to form the classic spheroidal, micron-sized particles indicative of GSR. However, the rapidly changing pressure and temperature of the reaction zone implies that the reactions cannot go to completion. In this study, we use a conductivity detector to show that GSR produces an electrical pulse which corroborates the incomplete redox chemistry. We find that the shape of some GSR formed in an electric field also suggests its nonneutral character. Tantalizingly, the formation of GSR might be a result of Coulombic repulsion shattering the molten droplets in to smaller spheroids. Lastly, we suggest that deposition or transfer of GSR could be influenced by static electricity, an area which should be further studied.


Journal Details

This article was published in the following journal.

Name: Journal of forensic sciences
ISSN: 1556-4029


DeepDyve research library

PubMed Articles [5869 Associated PubMed Articles listed on BioPortfolio]

Firearm Legislation Stringency and Firearm-Related Fatalities among Children in the United States.

Firearm-related injuries are the second leading cause of pediatric death in the U.S. We sought to evaluate the effectiveness of both state child access prevention (CAP) laws and gun regulations on ped...

Understanding Gunshot Residue Evidence and Its Role in Forensic Science.

Gunshot residue, or GSR, can be a valuable tool in forensic science, but its importance depends greatly on how it is utilized during an investigation and applied in criminal courts. This comprehensive...

Application of total X-Ray fluorescence to gunshot residue determination.

Currently the great majority of the criminal acts have involved the use of firearms, for these reasons the evidences generate from these are one of the fundamental pillars of a forensic investigation....

Association of Increased Safe Household Firearm Storage With Firearm Suicide and Unintentional Death Among US Youths.

Firearm injury is the second leading cause of death in the United States for children and young adults. The risk of unintentional and self-inflicted firearm injury is lower when all household firearms...

What I have is what I am: Differences in demographics, suicidal thoughts and behaviors, and firearm behavior and beliefs between firearm owners who do and do not primarily identify as firearm owners.

Non-legislative forms of means safety (i.e., safe firearm storage practices) have been promoted as a way to reduce elevated suicide risk found among firearm owners. However, evidence suggests that som...

Clinical Trials [2694 Associated Clinical Trials listed on BioPortfolio]

Firearm Storage Device Distribution to Families of Children With Mental Health Complaints

This study aims to describe the baseline rate of safe firearm storage device use in the homes of pediatric patients with mental health complaints treated in the Emergency Department (ED) a...

Helping Individuals With Firearm Injuries

The investigators will conduct a cluster randomized trial of an intervention program that combines a hospital-based intervention, structured outreach program, and multi-agency attention. T...

The Use of Public Messaging for the Promotion of Firearm Safety to Veterans

This pilot study seeks to determine if exposure to the firearm safety PSA developed by the U.S. Department of Veterans Affairs (VA) is associated with changes in related beliefs and safe s...

Identifying Effective Approaches to Counseling on Firearm Safety

Each year in the United States (U.S.), over 40,000 individuals die by suicide, and approximately half of these deaths occur by intentional, self-inflicted gunshot wounds. Given these stagg...

Comparison of Transthoracic Electrical Bioimpedance and Pulse Contour Analysis in Renal Transplantation Patients

Hemodynamics monitoring using non-invasive transthoracic electrical bioimpedance ICON are compatible with standard invasive monitoring using pulse contour analysis EV1000

Medical and Biotech [MESH] Definitions

Use of a pulse of X-rays or fast electrons to generate free radicals for spectroscopic examination.

Evaluation of the contour of the PULSE waves which vary in different parts of the circulation and depend on physiological as well as pathophysiological conditions of the individual.

Head injuries which feature compromise of the skull and dura mater. These may result from gunshot wounds (WOUNDS, GUNSHOT), stab wounds (WOUNDS, STAB), and other forms of trauma.

Technique used in AYURVEDIC MEDICINE, and EAST ASIAN TRADITIONAL MEDICINE, in which reading PULSE is used in the diagnosis of diseases.

The application, via IMPLANTED ELECTRODES, of short bursts of electrical energy in the radiofrequency range, interspersed with pauses in delivery of the current long enough to dissipate the generated heat and avoid heat-induced tissue necrosis.

Quick Search

DeepDyve research library

Searches Linking to this Article