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相关概念视频

X-ray Crystallography02:18

X-ray Crystallography

24.2K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
24.2K
X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

4.0K
X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
4.0K

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相关实验视频

Updated: Sep 11, 2025

Biochemical and Structural Characterization of the Carbohydrate Transport Substrate-binding-protein SP0092
08:53

Biochemical and Structural Characterization of the Carbohydrate Transport Substrate-binding-protein SP0092

Published on: October 2, 2017

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关于异常衍射近似的精度的全面研究.

Nadia E Álvarez-Chávez, Anays Acevedo-Barrera, Roberto Márquez-Islas

    Applied optics
    |August 12, 2025
    PubMed
    概括

    本研究评估了生物粒子对光散射的异常衍射近似值. 结果显示其精度有所不同,为模拟粒子相互作用提供了洞察力.

    科学领域:

    • 物理 物理学 物理
    • 光学是什么?光学是什么?光学是什么?
    • 生物物理学的生物物理.

    背景情况:

    • 异常衍射近似被广泛用于光散射计算.
    • 它对各种参数的生物颗粒的准确性尚未得到充分证实.

    研究的目的:

    • 为了广泛评估异常衍射近似的准确性.
    • 评估其在模拟生物粒子光散射中的性能.
    • 为不同的散射场景提供详细的错误图.

    主要方法:

    • 使用异常衍射近似的光散射模拟.
    • 与已建立的分散模型在不同颗粒大小和折射率上进行比较.
    • 对各种光学散射参数的相对误差的分析.

    主要成果:

    • 异常衍射近似的准确性高度依赖于粒子大小和折射率.
    • 详细的错误地图揭示了近似表现良好或差的特定条件.
    • 对某些生物颗粒的特征观察到显著的偏差.

    结论:

    • 异常衍射近似为生物粒子光散射提供了一个有用但有限的工具.

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    Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography
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    Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography

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    Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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    Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

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    Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography
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    Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography

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  • 了解它的误差率对于生物物理应用中的准确建模至关重要.
  • 为了在特定的生物环境中获得更精确的散射模型,可能需要进一步的研究.