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Applications Of NMR In Biology

Applications Of NMR In Biology

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.

NMR Spectroscopy: Spin–Spin Coupling

NMR Spectroscopy: Spin–Spin Coupling

The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...

¹H NMR: Interpreting Distorted and Overlapping Signals

¹H NMR: Interpreting Distorted and Overlapping Signals

Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...

NMR Spectrometers: Overview

NMR Spectrometers: Overview

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...

Nuclear Magnetic Resonance (NMR): Overview

Nuclear Magnetic Resonance (NMR): Overview

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...

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SpinSPJ: a novel NMR scripting system to implement artificial intelligence and advanced applications.

Zao Liu^1,2, Zhiwei Chen³, Kan Song⁴

¹State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Center for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, People's Republic of China.

BMC Bioinformatics

|December 8, 2021

Summary

A new scripting system, SpinSPJ, enhances nuclear magnetic resonance (NMR) software by integrating Java and Python. This allows researchers to extend NMR functionality and develop advanced applications using diverse script libraries.

Keywords:

Artificial intelligence CPython Data processing Instrument control Java NMR Script Software

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Published on: April 19, 2021

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Area of Science:

Chemistry
Computer Science
Biophysics

Background:

Nuclear Magnetic Resonance (NMR) spectrometer software typically uses non-scripting languages, limiting user flexibility.
Existing scripting systems struggle to extend core NMR software or utilize advanced libraries for specialized domains like metabolomics.
There is a need for a novel scripting system to enhance NMR software integration and application development.

Purpose of the Study:

To introduce SpinSPJ, a novel scripting system for NMR spectrometers.
To enable seamless integration of Java-based NMR methods and CPython libraries.
To provide NMR researchers with a flexible platform for custom application development.

Main Methods:

Developed SpinSPJ as a plug-in for the Java-based SpinStudioJ NMR software.
Created a bridge module to integrate Java and CPython runtime environments via the Java Native Interface.
Enabled CPython-style calls to Java-based instrument control and data processing methods.

Main Results:

SpinSPJ supports both extending the non-script main program and advanced NMR applications.
Researchers can leverage rich CPython libraries for complex analyses like multivariate statistics and deep learning.
The system facilitates easy calling of instrument control and data processing functions.

Conclusions:

SpinSPJ provides a user-friendly environment for custom NMR functionality.
It allows easy integration of NMR applications with emerging technologies.
The SpinSPJ scripting system is freely available for download.