Results 11 to 20 of about 4,172 (138)

Low-Field Benchtop NMR Spectroscopy for Quantification of Aldehydic Lipid Oxidation Products in Culinary Oils during Shallow Frying Episodes [PDF]

open access: yesFoods, 2023
Introduction: Toxic aldehydic lipid oxidation products (LOPs) arise from the thermo-oxidative deterioration of unsaturated fatty acids present in heated culinary oils when exposed to high-temperature frying episodes, and currently these effects represent
Miles Gibson   +3 more
doaj   +2 more sources

Gradient-based pulse sequences for benchtop NMR spectroscopy

open access: yesJournal of Magnetic Resonance, 2020
Benchtop NMR spectroscopy has been on the rise for the last decade, by bringing high-resolution NMR in environments that are not easily compatible with high-field NMR. Benchtop spectrometers are accessible, low cost and show an impressive performance in terms of sensitivity with respect to the relatively low associated magnetic field (40-100 MHz ...
Boris Gouilleux   +2 more
exaly   +5 more sources

Hyperpolarised benchtop NMR spectroscopy for analytical applications

open access: yesProgress in Nuclear Magnetic Resonance Spectroscopy
Benchtop NMR spectrometers, with moderate magnetic field strengths (B0=1-2.4T) and sub-ppm chemical shift resolution, are an affordable and portable alternative to standard laboratory NMR (B0≥7T). However, in moving to lower magnetic field instruments, sensitivity and chemical shift resolution are significantly reduced.
Ana I Silva Terra, Meghan E Halse
exaly   +4 more sources

Glucose-to-Fructose Isomerization: Optimisation and Mechanistic Insights Using Cheap Polyaluminium Chloride Catalyst [PDF]

open access: yesMolecules
The catalytic isomerization of glucose to fructose is a pivotal step in the valorisation of lignocellulosic biomass. In this study, polyaluminium chloride (PAC), a low-cost, industrially available material characterised by polynuclear aluminium–oxo ...
Antonella Angelini, Carlo Pastore
doaj   +2 more sources

Leishmania Infection: A Bioorganic Model Under the Light of Benchtop Low Field Nuclear Magnetic Resonance [PDF]

open access: yesBiological Procedures Online
Background Low-field benchtop Nuclear Magnetic Resonance (NMR) spectrometers rely on permanent magnets and do not require deuterated solvents, being increasingly employed for quality control and the profilometric assays of complex matrices from food ...
Jairo Mendoza-Roldan   +9 more
doaj   +2 more sources

Recent Applications of Benchtop Nuclear Magnetic Resonance Spectroscopy

open access: yesMagnetochemistry, 2021
Benchtop nuclear magnetic resonance (NMR) spectroscopy uses small permanent magnets to generate magnetic fields and therefore offers the advantages of operational simplicity and reasonable cost, presenting a viable alternative to high-field NMR ...
Hyo-Yeon Yu, Sangki Myoung, Sangdoo Ahn
doaj   +1 more source

Benchtop 1H NMR spectroscopy as a practical tool for characterization of chemically ex-changing systems in Ascorbic acid

open access: yesJournal of Advanced Research in Natural and Applied Sciences, 2021
Nuclear magnetic resonance (NMR) spectra and its action on characterization of pH dependent systems are among the most useful tools in spectroscopic techniques. Nevertheless, practical considerations often limit the application of High field NMR owing to
Sevil Cikrikci
doaj   +1 more source

What is the best spectroscopic method for simultaneous analysis of organic acids and (poly)saccharides in biological matrices: Example of Aloe vera extracts?

open access: yesTalanta Open, 2023
Several species of (poly)saccharides and organic acids can be found often simultaneously in various biological matrices, e.g., fruits, plant materials, and biological fluids. The analysis of such matrices sometimes represents a challenging task.
Franziska Block   +6 more
doaj   +1 more source

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