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相关概念视频

Applications Of NMR In Biology01:25

Applications Of NMR In Biology

4.4K
Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics  for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
4.4K
Two-Dimensional (2D) NMR: Overview01:12

Two-Dimensional (2D) NMR: Overview

1.4K
The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily interpreted using 2-dimensional (2D) NMR. Unlike 1D NMR, 2D NMR has two frequency axes that provide the coupling information between the nucleus A and nucleus B in a molecule. The process from which 2D spectra are obtained has four steps.
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse....
1.4K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

1.7K
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
1.7K
NMR Spectrometers: Overview01:20

NMR Spectrometers: Overview

2.1K
NMR spectrometers consist of a strong magnet, a radiofrequency transmitter, and a detector attached to a computer console for recording spectra of samples containing NMR-active nuclei. In first-generation NMR instruments called continuous-wave spectrometers, the resonance frequencies of the nuclei are determined by frequency-sweep or field-sweep methods. The magnetic field strength is fixed and the rf signal is swept in the former, while the radiofrequency signal is fixed and the magnetic field...
2.1K
Nuclear Magnetic Resonance (NMR): Overview01:07

Nuclear Magnetic Resonance (NMR): Overview

6.6K
Nuclear magnetic resonance (NMR) is a phenomenon exhibited by certain nuclei that can absorb characteristic radio frequency radiation under certain conditions. NMR has been extensively applied in molecular spectroscopy and medical diagnostic imaging. In both these applications, the molecule or subject under study is placed in a magnetic field and irradiated with radio frequency energy.
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...
6.6K

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Updated: Jan 9, 2026

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments
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使用NMRRFx进行NMR数据处理,可视化,分析和结构计算.

Ellen Koag1, Simon G Hulse1, Gregory L Helms1

  • 1Structural Biology Initiative, Advanced Science Research Center at the CUNY Graduate Center, New York, NY, USA.

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概括
此摘要是机器生成的。

NMRFx是一个新的软件应用程序,增强核磁共振 (NMR) 数据分析. 它提供了用于处理,可视化和解释各种科学领域复杂分子数据的高级功能.

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科学领域:

  • 化学 化学 化学
  • 生物化学 生物化学
  • 结构生物学 结构生物学

背景情况:

  • 核磁共振 (NMR) 谱学提供了关于分子系统的关键化学,结构和动态信息.
  • 对NMR数据的有效分析依赖于复杂的计算工具来处理,可视化和解释.
  • 现有的软件可能缺乏用于全面NMR数据分析的集成功能.

研究的目的:

  • 介绍NMRFx,这是一款旨在简化和增强NMR数据分析的新型软件应用程序.
  • 整合和增强已建立的NMR分析工具 (NMRViewJ和NMRFx处理器) 的功能.
  • 通过案例研究来证明NMRFx在各种科学应用中的实用性.

主要方法:

  • 开发NMRFx,一个高速,功能丰富的图形用户界面 (GUI) 应用程序.
  • 集成数据处理,峰值选择,分配,化学转移预测和分子结构计算能力.
  • 应用NMRFx在各种案例研究中,包括蛋白质,RNA,天然产品和代谢学分析.

主要成果:

  • NMRFx成功地促进了全面的NMR数据处理和分析.
  • 该软件展示了高速性能和丰富的功能集,用于复杂的数据集.
  • 案例研究证实了NMRFx在各种应用中的有效性,从小分子到大型生物分子和代谢学.

结论:

  • NMRFx代表了NMR数据分析软件的重大进步.
  • 集成平台为跨多个科学学科的研究人员提供了增强的能力.
  • NMRFx提供了一种强大而通用的工具,用于从NMR实验中获得分子见解.