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Related Concept Videos

Nuclear Fission02:50

Nuclear Fission

10.3K
Many heavier elements with smaller binding energies per nucleon can decompose into more stable elements that have intermediate mass numbers and larger binding energies per nucleon—that is, mass numbers and binding energies per nucleon that are closer to the “peak” of the binding energy graph near 56. Sometimes neutrons are also produced. This decomposition of a large nucleus into smaller pieces is called fission. The breaking is rather random with the formation of a large...
10.3K
Nuclear Power02:36

Nuclear Power

8.2K
Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
8.2K
Nuclear Transmutation03:20

Nuclear Transmutation

18.0K
Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed...
18.0K
Nuclear Fusion02:45

Nuclear Fusion

31.1K
The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
31.1K
Nuclear Stability03:18

Nuclear Stability

19.9K
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together...
19.9K
Nuclear Export01:42

Nuclear Export

3.7K
The nucleus restricts several proteins within and allows others to pass. The restricted proteins possess a nuclear retention sequence or NRS, anchoring them to the nuclear lamins and preventing their transport to the cytosol. The non-restricted proteins, after their synthesis, are transported to their site of action, such as the cytosol or other organelles, with the help of nuclear export signals or NES.
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
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Production of Synthetic Nuclear Melt Glass
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Ending Nuclear Weapons, Before They End Us.

Kamran Abbasi1, Parveen Ali2, Virginia Barbour3

  • 1Editor-in-Chief, British Medical Journal, London, UK.

International Journal of Health Policy and Management
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This summary is machine-generated.

This editorial addresses the significant risks associated with nuclear energy and weapons. It calls for urgent global action to mitigate these dangers and promote a safer future.

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Area of Science:

  • This comment focuses on nuclear risk assessment and global security.
  • It highlights the multifaceted dangers posed by nuclear technologies.

Background:

  • The editorial discusses the escalating global nuclear threat.
  • It emphasizes the need for international cooperation on nuclear safety.

Discussion:

  • The authors critically examine current nuclear policies and their implications.
  • This piece underscores the ethical and societal responsibilities concerning nuclear proliferation.

Key Insights:

  • A primary insight is the interconnectedness of nuclear energy and weapons risks.
  • The commentary stresses the urgency of de-escalation and risk reduction strategies.

Outlook:

  • The authors advocate for strengthened international treaties and verification mechanisms.
  • A future free from nuclear threats requires sustained political will and public engagement.