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$X-ray Diffraction of Biological Samples$ 01:10

X-ray Diffraction of Biological Samples

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 crystal...

X-ray Crystallography

X-ray Crystallography

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...

Super-resolution Fluorescence Microscopy

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.

Determination of Crystal Structures

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...

Overview of Electron Microscopy

Overview of Electron Microscopy

The wavelengths of visible light ultimately limit the maximum theoretical resolution of images created by light microscopes. Most light microscopes can only magnify 1000X, and a few can magnify up to 1500X. Electrons, like electromagnetic radiation, can behave like waves, but with wavelengths of 0.005 nm, they produce significantly greater resolution up to 0.05 nm as compared to 500 nm for visible light. An electron microscope (EM) can create a sharp image that is magnified up to 2,000,000X.

Three-Dimensional Microscopy in Microbiology

Three-Dimensional Microscopy in Microbiology

Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...

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Updated: Jul 3, 2026

$Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples$

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

高解像度スキャニングX線微分顕微鏡

Pierre Thibault¹, Martin Dierolf, Andreas Menzel

¹Paul Scherrer Institut, 5232 Villigen PSI, Switzerland. pierre.thibault@psi.ch

Science (New York, N.Y.)

|July 19, 2008

まとめ

この要約は機械生成です。

この研究は,コヒーレント difrractive イメージング (CDI) とスキャニングトランスミッションX線顕微鏡 (STXM) を組み合わせた新しいプチコグラフィックイメージング方法を導入しています. この高度なテクニックは,メソスコピック生命体と材料科学画像の解像度を高めます.

さらに関連する動画

$Synthesis and Microdiffraction at Extreme Pressures and Temperatures$

Synthesis and Microdiffraction at Extreme Pressures and Temperatures

Published on: October 7, 2013

$High Pressure Single Crystal Diffraction at PX^2$

High Pressure Single Crystal Diffraction at PX^2

Published on: January 16, 2017

関連する実験動画

Last Updated: Jul 3, 2026

$Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples$

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

$Synthesis and Microdiffraction at Extreme Pressures and Temperatures$

Synthesis and Microdiffraction at Extreme Pressures and Temperatures

Published on: October 7, 2013

$High Pressure Single Crystal Diffraction at PX^2$

High Pressure Single Crystal Diffraction at PX^2

Published on: January 16, 2017

科学分野:

先進的な顕微鏡技術が用いられている.
メソスコピックイメージング
X線顕微鏡によるX線顕微鏡検査

背景:

CDIは高解像度 (<10 nm) を提供しますが,厳格なデータとサンプル準備が必要です.
スキャニング・トランスミッションX線顕微鏡 (STXM) は単純なデータ分析をしていますが,スポットサイズの解像度によって制限されています.
CDIとSTXMは独立して進化し,明確な利点と限界を提示しています.

研究の目的:

CDIとSTXMの間のギャップを埋めるために,統一されたプチコグラフィックイメージング方法を開発します.
改善されたナノスケールイメージングのための両方の技術の強みを活用する.
複雑なメソスコピク標本を高解像度および高浸透度で調査することを可能にします.

主な方法:

プチコグラフィのイメージング方法の開発と応用.
STXMスキャンの内部に完全な difraktion パターンの測定を統合する.
詳細な画像を撮影するために,X線の高い穿透力を利用します.

主要な成果:

CDIとSTXMを組み合わせたプチコグラフィック・メソッドの実証.
メソスコピクサンプルを高空間解像度で画像化しました.
各スキャンポイントで difraktion パターンを測定することによって包括的なデータ取得を可能にしました.

結論:

開発されたプチコグラフィックメソッドは,CDIとSTXMを効果的に統合しています.
この技術は,複雑な生物学的および材料科学の標本の高解像度イメージングのための強力なツールを提供します.
将来の応用には,組み込み半導体デバイスとセルラーネットワークの研究が含まれます.