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相关概念视频

Non-nuclear Inheritance01:29

Non-nuclear Inheritance

23.2K
Most DNA resides in the nucleus of a cell. However, some organelles in the cell cytoplasm⁠—such as chloroplasts and mitochondria⁠—also have their own DNA. These organelles replicate their DNA independently of the nuclear DNA of the cell in which they reside. Non-nuclear inheritance describes the inheritance of genes from structures other than the nucleus.
23.2K
Nuclear Stability03:18

Nuclear Stability

23.2K
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...
23.2K
Range00:59

Range

14.1K
The range is one of the measures of variation. It can be defined as the difference between a dataset's highest and lowest values. For example, in the study of seven 16-ounce soda cans, the filled volume of soda was measured, thus producing the following amount (in ounces) of soda:
15.9; 16.1; 15.2; 14.8; 15.8; 15.9; 16.0; 15.5
Measurements of the amount of soda in a 16-ounce can vary since different subjects record these measurements or since the exact amount - 16 ounces of liquid, was not...
14.1K
Nuclear Fusion02:45

Nuclear Fusion

33.9K
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...
33.9K
Rise of Liquid in a Capillary Tube01:18

Rise of Liquid in a Capillary Tube

3.2K
When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.
3.2K
Nuclear Binding Energy02:13

Nuclear Binding Energy

14.8K
The difference between the calculated and experimentally measured masses is known as the mass defect of the atom. In the case of helium-4, the mass defect indicates a “loss” in mass of 4.0331 amu – 4.0026 amu = 0.0305 amu. The loss in mass accompanying the formation of an atom from protons, neutrons, and electrons is due to the conversion of that mass into energy that is evolved as the atom forms. The nuclear binding energy is the energy produced when the atoms’ nucleons are bound...
14.8K

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相关实验视频

Updated: Feb 1, 2026

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
04:35

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment

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核集体性从近距离物理学的意想不到的起

Kevin S Becker1, Kristina D Launey1, Andreas Ekström2

  • 1Louisiana State University, Department of Physics and Astronomy, Baton Rouge, Louisiana 70803, USA.

Physical review letters
|January 30, 2026
PubMed
概括
此摘要是机器生成的。

我们发现,短距离核子相互作用令人惊地影响了集体核运动,影响了-6和碳-12等轻核中的四极集体. 这挑战了传统的观点,即将集体性仅与长期相关性联系在一起.

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Production of Synthetic Nuclear Melt Glass
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Production of Synthetic Nuclear Melt Glass

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Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption

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相关实验视频

Last Updated: Feb 1, 2026

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
04:35

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment

Published on: July 5, 2024

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Production of Synthetic Nuclear Melt Glass
04:36

Production of Synthetic Nuclear Melt Glass

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Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption
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科学领域:

  • 核物理 核物理 核物理
  • 量子色态动力学 量子色态动力学
  • 原子核中的原子核

背景情况:

  • 集体核运动通常归因于远程相关性.
  • 了解核中近距离和远距离力量之间的相互作用至关重要.

研究的目的:

  • 研究短距离核子-核子相互作用对集体核运动的影响.
  • 探索在轻核中出现的核集体性的起源.

主要方法:

  • 使用最先进的 ab initio 技术进行核计算.
  • 在-6和碳-12的低状态下分析了四极集体性.

主要成果:

  • 发现了短距离S波接触合对四极集体性的显著影响.
  • 观察到这些合微妙地改变了表面振荡,而没有改变整体核形状的贡献.
  • 确定了两个S波接触合的对立作用.

结论:

  • 核集体性不仅仅是由远距离相关性驱动的,而且也受到短距离核子-核子相互作用的显著影响.
  • 提供了关于核集体的出现及其与近距离核力量的基本联系的新见解.