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Related Concept Videos

Radiation: Applications01:17

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
Mutations01:35

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Radiation Pressure: Problem Solving01:09

Radiation Pressure: Problem Solving

The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force per...
Absorption of Radiation01:05

Absorption of Radiation

The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
Biological Effects of Radiation02:59

Biological Effects of Radiation

All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they produce ions...
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

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Updated: Jun 19, 2026

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
06:20

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

[Radiation on the dining table].

Laura Rossi1, Dana Watson, Soledad Escandarani

  • 1Cátedra de Microbiología y Parasitología, Universidad de Buenos Aires, Argentina.

Revista Chilena De Infectologia : Organo Oficial De La Sociedad Chilena De Infectologia
|October 6, 2009
PubMed
Summary
This summary is machine-generated.

Food irradiation is a safe and effective method to eliminate harmful bacteria like E. coli. Decades of research confirm that irradiated foods pose no health risks and retain their nutritional value, debunking consumer concerns about radioactivity.

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Area of Science:

  • Food Science
  • Microbiology
  • Public Health

Context:

  • Food irradiation is a method to reduce microbial contamination.
  • Consumer concerns persist regarding the safety and potential radioactivity of irradiated foods.
  • The medical community largely agrees on the safety of food irradiation.

Purpose:

  • To analyze scientific studies on food irradiation safety.
  • To address consumer misconceptions about food irradiation.
  • To evaluate the risk-benefit of irradiating food contaminated with E. coli O157:H7.

Summary:

  • Extensive research shows food irradiation is safe and does not affect nutritional value.
  • No scientific evidence demonstrates health risks associated with consuming irradiated food.
  • The risk of bacterial contamination from food, like E. coli, is significantly higher than any potential risk from irradiation.

Impact:

  • Provides evidence-based information to counter consumer misconceptions about food irradiation.
  • Supports the safe application of food irradiation technology to enhance food safety.
  • Highlights the negligible risks of food irradiation compared to the severe risks of foodborne bacterial infections.