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相关概念视频

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...

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PARTICLE PHYSICS: Elusive Particle Leaves Telltale Trace.

Science (New York, N.Y.)·2007
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PHYSICS: Will NIF Live Up to Its Name?

Science (New York, N.Y.)·2007
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相关实验视频

Updated: Jul 8, 2026

Visualization and Analysis of Blood Flow and Oxygen Consumption in Hepatic Microcirculation: Application to an Acute Hepatitis Model
10:40

Visualization and Analysis of Blood Flow and Oxygen Consumption in Hepatic Microcirculation: Application to an Acute Hepatitis Model

Published on: August 4, 2012

物理:肝脏激光器是否会发出明亮的光?

C Seife, D Malakoff

    Science (New York, N.Y.)
    |September 11, 2007
    PubMed
    概括

    国家点火设施 (NIF) 旨在实现激光驱动的核聚变,但面临着挑战. 最近的一份报告质疑它的未来,一些盟友正在考虑缩小设计.

    科学领域:

    • 核聚变科学 核聚变科学
    • 激光技术 激光技术 激光技术
    • 国家安全国家安全.

    背景情况:

    • 国家点火设施 (NIF) 是一个大型激光系统,正在劳伦斯利弗莫尔国家实验室开发.
    • 国际核基金的主要目标包括为科学研究实现可控的核聚变反应,并支持核武器管理.
    • 该项目在其历史上遇到了重大的技术和程序性挑战.

    研究的目的:

    • 批判性地评估国家点火设施 (NIF) 的历史表现和未来可行性.
    • 评估过去挑战对NIF科学和国家安全目标的影响.
    • 探索NIF的潜在替代途径,包括缩小规模的配置.

    主要方法:

    • 审查历史项目数据和绩效指标.
    • 分析科学和政治利益相关者的观点.
    • 检查替代NIF设计的技术可行性.

    主要成果:

    • 一份新的报告强调了NIF项目的持久问题和困难的过去.
    • 人们对NIF的未来成功和全面实施表示怀疑.
    • 盟友之间的讨论表明,可能会向缩小规模的NIF设计转变.

    更多相关视频

    Multiphoton Microscopic Observation of Vessels in Mouse Liver Tissue
    06:33

    Multiphoton Microscopic Observation of Vessels in Mouse Liver Tissue

    Published on: May 17, 2021

    Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy
    09:19

    Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy

    Published on: August 29, 2025

    相关实验视频

    Last Updated: Jul 8, 2026

    Visualization and Analysis of Blood Flow and Oxygen Consumption in Hepatic Microcirculation: Application to an Acute Hepatitis Model
    10:40

    Visualization and Analysis of Blood Flow and Oxygen Consumption in Hepatic Microcirculation: Application to an Acute Hepatitis Model

    Published on: August 4, 2012

    Multiphoton Microscopic Observation of Vessels in Mouse Liver Tissue
    06:33

    Multiphoton Microscopic Observation of Vessels in Mouse Liver Tissue

    Published on: May 17, 2021

    Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy
    09:19

    Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy

    Published on: August 29, 2025

    结论:

    • 目前国家点火设施 (NIF) 的发展轨迹面临着巨大的不确定性.
    • 过去的挑战可能需要重新评估NIF的设计和目标.
    • 缩小规模的NIF为挽救科学和战略目标提供了一个可能的妥协.