Results 11 to 20 of about 568,615 (320)
Liquid-state NMR spectroscopy for complex carbohydrate structural analysis: A hitchhiker's guide.
Carbohydrate Polymers, 2021 Structural determination of carbohydrates is mostly performed by liquid-state NMR, and it is a demanding task because the NMR signals of these biomolecules explore a rather narrow range of chemical shifts, with the result that the resonances of each ...
I. Speciale +8 more
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Colorants, 2023 This work provides significant insight into the molecular structure of alizarin lake pigments used by artists in the past. To characterize two red powders, lakes 1 and 2, obtained by complexation of 1,2-dihydroxy anthraquinone (alizarin) with Al3+, a ...
Leonel C. Silva +4 more
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Journal of Magnetic Resonance Open, 2022 Aimed at fundamental understanding and design of advanced magnetic resonance experiments on basis of Hamiltonians, we describe highly convergent and exact effective Hamiltonian methods which alleviate important deficits of current less accurate methods ...
Anders B. Nielsen, Niels Chr. Nielsen
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Optimizing Sensitivity-enhanced Quantitative 13C NMR Experiment by Genetic Algorithm
Chinese Journal of Magnetic Resonance, 2023 Quantitative NMR experiments are an essential part of NMR analysis, which play a critical role in component analysis and compound structure identification. Carbon atoms form the framework of organic compounds, and 13C NMR has unique advantages in organic
SONG Linhong +4 more
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NMR Data Analysis of Manidipine Hydrochloride
Chinese Journal of Magnetic Resonance, 2021 Manidipine hydrochloride is the third generation of new synthetic antihypertensive drugs. The structure of manidipine hydrochloride was confirmed with 1D and 2D nuclear magnetic resonance (NMR) techniques, such as 1H NMR, 13C NMR, DEPT-135, 1H-1H COSY ...
LI Yu-jiang +6 more
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Analytical Chemistry, 2020 Nuclear magnetic resonance (NMR) is one of the most powerful analytical tools and is extensively applied in many fields. However, compared to other spectroscopic techniques, NMR has lower sensitivity, impeding its wider applications.
Ke Wu +7 more
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Interactions Between n-Butanol/Propionic Acid and Humic Acid Studied by NMR Spectroscopy
Chinese Journal of Magnetic Resonance, 2021 The Fischer-Tropsch process produces liquid fuels. However, the process also yields Fischer-Tropsch wastewater, an acidic and corrosive byproduct enriched with various water-soluble oxygen-containing compounds such as alcohols, aldehydes, ketones and ...
Shu-huai ZHANG +5 more
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Sample illumination device facilitates in situ light-coupled NMR spectroscopy without fibre optics
Communications Chemistry, 2022 In situ illumination of liquid-state NMR samples allows to characterise light-dependent chemical and biological phenomena, but, in practice, the position of an NMR sample deep within the bore of a spectrometer magnet renders such illumination challenging.
Jack E. Bramham, Alexander P. Golovanov
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Pseudo-resonance structures in chiral alcohols and amines and their possible aggregation states
Frontiers in Chemistry, 2022 We now report that some chiral compounds, like alcohols, which are not sterically hindered atropisomers nor epimer mixtures, exhibit two sets of simultaneous NMR spectra in CDCl3.
Huajie Zhu +21 more
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, 2020 1H Liquid-state NMR spectroscopy was applied for the first time to lignin nanoparticles (LNP’s) in aqueous suspension to study the surface composition of LNP’s and to acquire a better understanding...
Ievgen V. Pylypchuk +3 more
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