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相关概念视频

Scatter Plot01:15

Scatter Plot

6.9K
The most common and easiest way to display the relationship between two variables, x and y, is a scatter plot. A scatter plot shows the direction of a relationship between the variables. A clear direction happens when there is either:
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X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

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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...
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Data Collection by Observations01:08

Data Collection by Observations

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Data collection refers to a systematic way of obtaining, observing, measuring, and analyzing accurate information. Observational studies are one of the most widely used methods of data collection. It involves collecting data by observing the behavior and physical characteristics of a sample without making any modifications to the sample.
An astronomer viewing the motion and brightness of stars in the sky and recording the data is an example of observational data collection. A botanist recording...
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Spectrophotometry: Introduction01:16

Spectrophotometry: Introduction

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Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
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相关实验视频

Updated: Jul 15, 2025

Scattering And Absorption of Light in Planetary Regoliths
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Published on: July 1, 2019

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扩散散射和数据收集的介绍.

Xiaokun Pei1, Neti Bhatt2, Haoyue Wang3

  • 1Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, United States.

Methods in enzymology
|September 25, 2023
PubMed
概括

这项研究提供了收集高质量的宏分子扩散散散射数据的第一个详细指南. 这些程序可以从X射线结晶学实验中提取蛋白质的集体运动信息.

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相关实验视频

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科学领域:

  • 在X射线晶体学.
  • 结构生物学是结构生物学.
  • 生物物理学的生物物理.

背景情况:

  • 从扩散散射中提取蛋白质集体运动数据一直是X射线晶体学中长期存在的挑战.
  • 最近的进展使得宏分子分散散射的测量和解释变得更加可行.
  • 缺乏标准化的程序阻碍了扩散散射技术的广泛采用.

研究的目的:

  • 为进行宏分子分散散射实验提供第一个全面的指导方针.
  • 为了规范分散散射数据的收集和评估.
  • 为了促进使用X射线晶体学研究蛋白质动力学.

主要方法:

  • 在宏分子晶体学光束线上准备和执行扩散散射实验的详细程序.
  • 使用直接探测器和支持室温研究的指导方针.
  • 定义质量指标,用于评估在光线和收集后的数据.

主要成果:

  • 建立了收集高质量的分散分散数据集的实用框架.
  • 证明了分散散射数据可以使用标准晶体学和专业软件进行处理.
  • 能够同时确定平均原子坐标和三维扩散散射地图.

结论:

  • 提供的指导方针使得宏分子分散散射实验可访问和可重复.
  • 分散散射数据分析可以让我们了解蛋白质在静态结构之外的集体运动.
  • 这项工作提升了X射线结晶学研究动态生物过程的能力.