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Related Concept Videos

Lethal Alleles02:41

Lethal Alleles

Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Fatigue01:21

Fatigue

Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
Vitamins01:30

Vitamins

Vitamins, derived from the Latin word for life, are essential organic substances required in small quantities for optimal growth and overall well-being. Unlike other organic nutrients, vitamins don't act as sources of energy or building materials but rather facilitate these nutrients' utilization by the body. Vitamins are predominantly coenzymes, assisting enzymes in specific chemical actions, like the oxidation of glucose for energy involving B vitamins. Most vitamins are not produced in our...
Drug Toxicity: Dose-Dependent Reactions01:24

Drug Toxicity: Dose-Dependent Reactions

Drug toxicities can be stratified into pharmacological, pathological, or genotoxic based on their mechanisms. The incidence and severity of these toxicities generally increase with the drug's concentration in the body and exposure time.Pharmacological toxicity is evident when the therapeutic effects of drugs overshoot into adverse reactions in a predictable, dose-dependent manner. Central nervous system (CNS) depression from barbiturates is a classic example, with effects escalating from...
Coronary Artery Disease III: Clinical Manifestations01:30

Coronary Artery Disease III: Clinical Manifestations

Coronary Artery Disease (CAD) is a primary health risk worldwide, leading to significant morbidity and mortality. The condition arises from the buildup of atherosclerotic plaques within the coronary arteries, resulting in diminished blood supply to the heart muscle.The clinical manifestations of CAD vary widely, from asymptomatic stages to severe, life-threatening conditions. Understanding these manifestations is crucial for early diagnosis and effective management.Angina Pectoris: The Warning...
Rocky Mountain Spotted Fever01:26

Rocky Mountain Spotted Fever

Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.

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Related Experiment Video

Updated: Jul 17, 2026

A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
11:28

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Published on: May 18, 2015

Can "tired bullets" be fatal?

Anar Gurbanov1, Merve Havan1, Fevzi Kahveci1

  • 1Department of Pediatric Intensive Care, Ankara University Faculty of Medicine, Ankara, Turkey.

Brain Injury
|January 22, 2026
PubMed
Summary

Accidental firearm injuries from

Area of Science:

  • Forensic Pathology
  • Ballistics
  • Public Health

Background:

  • Uncontrolled firearm acquisition is increasing.
  • Accidental firearm injuries are a growing concern.
  • The phenomenon of 'tired bullets' poses a unique risk.

Purpose of the Study:

  • To report a case of accidental firearm injury caused by a 'tired bullet.'
  • To highlight the dangers associated with bullets falling back to Earth.
  • To raise awareness about the increasing incidence of such injuries.

Main Methods:

  • Case report of a six-year-old boy.
  • Description of the physics of a bullet fired vertically.
  • Analysis of the injury mechanism.
Keywords:
Tired bulletsaccidental, energyfirearminjury

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A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
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The Treadmill Fatigue Test: A Simple, High-throughput Assay of Fatigue-like Behavior for the Mouse
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A Mouse Model of Fatigue Induced by Peripheral Irradiation
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Main Results:

  • The patient sustained an accidental firearm injury from a 'tired bullet.'
  • The bullet lost velocity and fell due to gravity, causing injury upon impact.
  • This type of injury is becoming more prevalent.

Conclusions:

  • 'Tired bullet' injuries are a preventable public health issue.
  • Stricter firearm control measures are needed.
  • Education on firearm safety is crucial to mitigate these risks.