Results 121 to 130 of about 12,406 (238)

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

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

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

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

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

Effect of molecular exchange on water droplet size analysis as determined by diffusion NMR : the W/O/W double emulsion case [PDF]

, 2016
Balcaen, Mathieu, Declerck, Arnout, Dewettinck, Koen, Guthausen, G, Martins, José, Sabatino, Paolo, Van der Meeren, Paul, Vermeir, Lien   +7 more
core   +1 more source

A Small-scale Procedure for Acid-catalyzed Ketal Formation [PDF]

, 2019
A modified procedure for dehydrative ketal protections is disclosed, which serves as an alternative to the classic Dean–Stark protocol. Studies show that this new procedure can outperform the Dean–Stark apparatus on small scales and thus serves as a ...
Du, Yun Emily, Stoltz, Brian M., Wright, Austin C.   +2 more
core  

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

Effect of oil globule size on water exchange mechanism in water-in-oil-in-water emulsions [PDF]

, 2016
Balcaen, Mathieu, Declerck, Arnout, Van der Meeren, Paul, Vermeir, Lien   +3 more
core   +1 more source

Enantioselective construction of the tricyclic core of curcusones A–D via a cross-electrophile coupling approach [PDF]

, 2019
Herein we report our recent progress toward the enantioselective total synthesis of the diterpenoid natural products curcusones A–D by means of complementary Stetter annulation or ring-closing metathesis (RCM) disconnections.
Stoltz, Brian M., Wright, Austin C.
core