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相关概念视频

Interaction of EM Radiation with Matter: Spectroscopy01:12

Interaction of EM Radiation with Matter: Spectroscopy

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Electromagnetic (EM) radiation can be considered an oscillating electric and magnetic field propagating through a medium that can interact with matter in its path. The electric field in the radiation can interact with electrical charges in the atoms or molecules in the matter. On the other hand, the magnetic field can interact with the magnetic field in the atomic nucleus. The study of the interaction between electromagnetic radiation and matter is termed spectroscopy. Spectroscopy is the study...
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Biological Effects of Radiation02:59

Biological Effects of Radiation

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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...
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Dual Nature of Electromagnetic (EM) Radiation01:10

Dual Nature of Electromagnetic (EM) Radiation

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Electromagnetic (EM) radiation consists of electric and magnetic field components oscillating in planes perpendicular to each other and mutually perpendicular to radiation propagation through space. EM radiation can be classified as a wave, characterized by the properties of waves such as wavelength (denoted as λ) and frequency (represented by ν).
Wavelength is the distance between two consecutive peaks (the highest point) or troughs (the lowest point) in the wave. Frequency is the...
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The Electromagnetic Spectrum02:37

The Electromagnetic Spectrum

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The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
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The Wave Nature of Light02:12

The Wave Nature of Light

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The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion. 
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Mutations01:35

Mutations

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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...
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相关实验视频

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Protocols for Assessing Radiofrequency Interactions with Gold Nanoparticles and Biological Systems for Non-invasive Hyperthermia Cancer Therapy
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电磁辐射与生物系统之间的相互作用.

Lingyu Liu1, Bing Huang2, Yingxian Lu3,4

  • 1Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China.

iScience
|March 4, 2024
PubMed
概括

了解电磁辐射 (EMR) 的生物效应仍然有限. 需要进一步的研究来探索EMR与生物系统的相互作用,特别是在热效应和复杂环境方面.

关键词:
生物科学 生物科学电磁学 电磁学 电磁学 电磁学物理 物理学 物理

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Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
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Diffuse Optical Spectroscopy for the Quantitative Assessment of Acute Ionizing Radiation Induced Skin Toxicity Using a Mouse Model
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科学领域:

  • 生物电磁学 生物电磁学
  • 环境健康科学科学 环境健康科学

背景情况:

  • 对电磁辐射 (EMR) 的生物效应进行了广泛的研究,但与生物系统相互作用的机制尚未完全理解.
  • 目前对EMR生物效应的理解是有限的,尽管进行了数十年的研究,但仍然存在许多局限性和未解决的问题.

研究的目的:

  • 总结EMR生物效应领域的共识,争议,局限性和未解决的问题.
  • 突出需要对各种生物系统和频率的EMR相互作用进行更广泛的研究.

主要方法:

  • 对研究EMR对人类,动物,细胞和生化反应影响的已发表作品的审查.
  • 包括替代方法,如介电光谱学,生物电磁辐射检测和理论预测.

主要成果:

  • 许多研究未能适当控制或考虑EMR的热效应.
  • 研究主要集中在电力线和无线通信频率上,忽视了其他EMR频段.
  • 复杂的电磁环境对生物系统的影响很少被讨论.

结论:

  • 目前对EMR生物效应的了解非常有限.
  • 需要进一步进行全面的调查,以解决关于EMR与生物学相互作用的众多未解答问题.