Results 51 to 60 of about 4,176 (138)

Development of Benchtop Low‑Field Nuclear Magnetic Resonance Technology and Its Application in Drug Control Field

Fayixue Zazhi
At present, the drug substitutes represented by new psychoactive substances are gradually becoming popular, leading to an increasing demand for identifying novel drugs with unknown structures in drug investigation.
LIAO Qi, LIU Yong-hong, JIAO Ying, YANG Xiao-ying, YANG Yi-hua, LIU Cui-mei, GAO Rui-xia   +6 more
doaj   +1 more source

Biological J‐Coupling Spectroscopy at Low Magnetic Field

Small Science
Nuclear magnetic resonance (NMR) spectroscopy is a powerful tool for investigating biological systems. In particular, low‐field NMR offers advantages for studying cellular metabolism in their native environment.
Gonzalo G. Rodriguez, Charlotte von Petersdorff‐Campen, Sergey Korchak, Oscar Sucre, Maria D. Santi, Josef Elsasser, Ruhuai Mei, Lisa M. Fries, Jan Felger, Andrea Markus, Frauke Alves, Stefan Glöggler   +11 more
doaj   +1 more source

Benchtop NMR Spectroscopy in Process Engineering

Nuclear magnetic resonance (NMR) is a highly attractive powerful method that enables non-invasive analysis of complex mixtures without requiring tedious calibration procedures. Benchtop NMR spectrometers are small, robust, and inexpensive, which makes them especially suited for process and reaction monitoring.
openaire   +2 more sources

Neural Networks for Conversion of Simulated NMR Spectra from Low-Field to High-Field for Quantitative Metabolomics

Metabolites
Background: The introduction of benchtop NMR instruments has made NMR spectroscopy a more accessible, affordable option for research and industry, but the lower spectral resolution and SNR of a signal acquired on low magnetic field spectrometers may ...
Hayden Johnson, Aaryani Tipirneni-Sajja
doaj   +1 more source

Application of Standard HSQC-ME Pulse Sequence on Benchtop NMR Devices for Quantitative Applications

Concepts in Magnetic Resonance: Part A, Bridging Education and Research
The heteronuclear single quantum correlation (HSQC) NMR method is widely used for the structural characterization of complex mixtures. In this study, the application range of multiplicity-enhanced HSQC (HSQC-ME) spectroscopy was broadened to quantitative
Klaudia Adels, Bernd Diehl, Margit Schulze, Yulia Monakhova   +3 more
doaj   +1 more source

Polarization losses from the nonadiabatic passage of hyperpolarized solutions through metallic components

Journal of Magnetic Resonance Open
From complex-mixture analysis to in vivo molecular imaging, applications of liquid-state nuclear spin hyperpolarization have expanded widely over recent years.
James Eills, Marc Azagra, David Gómez-Cabeza, Michael C.D. Tayler, Irene Marco-Rius   +4 more
doaj   +1 more source

Photo-CIDNP for quantification of micromolar analytes in urine

Communications Chemistry
Towards target diagnostics of low-concentrated molecules in biofluids, NMR spectroscopy faces limitations due to low sensitivity, signal overlap, and high equipment costs.
Marta Stefańska, Thomas Müntener, Sebastian Hiller   +2 more
doaj   +1 more source

Characterization of new psychoactive substances by integrating benchtop NMR to multi-technique databases. [PDF]

Drug Test Anal, 2022
Castaing-Cordier T, Benavides Restrepo A, Dubois D, Ladroue V, Besacier F, Buleté A, Charvoz C, Goupille A, Jacquemin D, Giraudeau P, Farjon J.   +10 more
europepmc   +1 more source

Spectroscopy Technologies to Screen Peanut Seeds with Superior Vigor Through “Chemical Fingerprinting”

Agronomy
Peanut seeds are harvested at different development stages (early and late) due to their uneven maturation. At the time of harvest, approximately 30% of the seeds are still immature, meaning they are not completely filled with compounds (e.g., oil and ...
Gustavo Roberto Fonseca de Oliveira, Welinton Yoshio Hirai, Dennis Silva Ferreira, Karolyne Priscila Oliveira Mota da Silva, Giovani Chaves Silva, Tiago Bueno Moraes, Clissia Barboza Mastrangelo, Fabiola Manhas Verbi Pereira, Edenir Rodrigues Pereira-Filho, Edvaldo Aparecido Amaral da Silva   +9 more
doaj   +1 more source

Enhancing ¹⁹F Benchtop NMR Spectroscopy by Combining para-Hydrogen Hyperpolarization and Multiplet Refocusing. [PDF]

ACS Meas Sci Au, 2023
Silva Terra AI, Rossetto M, Dickson CL, Peat G, Uhrín D, Halse ME.   +5 more
europepmc   +1 more source