Results 1 to 10 of about 55,911 (165)
Journal of Molecular Structure, 2007 Abstract Proton NMR spin–lattice relaxation times T1 were measured for urea as a function of temperature. An activation energy of 46.3 ± 4.7 kJ/mol was extracted and compared with the range of 38–65 kJ/mol previously reported in the literature as measured by different magnetic resonance techniques.
R E Taylor
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1H NMR Relaxation Processes in Lung Tissues at Low Magnetic Fields [PDF]
MoleculesProton spin–lattice and spin–spin NMR relaxation studies were conducted on lung tissue samples from 10 patients. For each case, relaxation properties of tumor tissue were compared with those of the corresponding reference tissue.
Karol Kołodziejski +4 more
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Asymmetry in three-site relaxation exchange NMR [PDF]
Magnetic Resonance, 2023 The asymmetry of peak integrals in 2D relaxation maps of exchange between three sites indicates circular flow between the relaxation sites. This disagrees with the detailed balance according to which the exchange between any pair of sites must be ...
B. Blümich, M. Parziale, M. Augustine
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NORD: NO Relaxation Delay NMR Spectroscopy [PDF]
Angewandte Chemie International Edition, 2021 AbstractThe novel concept of NORD (NO relaxation delay) NMR spectroscopy is introduced. The idea is to design concatenated experiments in a way that the magnetization used in the first relaxes toward equilibrium during the second and vice versa, thus saving instrument time.
Tamás Milán Nagy +2 more
openaire +2 more sources
23Na relaxometry: An overview of theory and applications
Magnetic Resonance Letters, 2023 23Na is a nuclear magnetic resonance (NMR)-active isotope with a nuclear spin quantum number of 3/2. 23Na relaxation phenomenon is at the core of 23Na NMR measurement and analysis.
Yifan Song +4 more
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NMRDyn: a program for NMR relaxation studies of protein association. [PDF]
PLoS ONE, 2008 Self-association is an important biological phenomenon that is associated with many cellular processes. NMR relaxation measurements provide data about protein molecular dynamics at the atomic level and are sensitive to changes induced by self-association.
Conan K Wang +2 more
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Why Does 1H NMR Signal Intensity of Concentrated Aqueous Acids and Bases Decrease Anomalously?
Electrochemistry, 2022 The signal detection of quantitative 1H nuclear magnetic resonance (1H qNMR) for the amount of water in HCl and KOH aqueous solutions at low pH (pH −1.2) and high pH (pH 16) was discussed, and an “anomaly of decreasing 1H NMR signal intensity” was ...
Kazuya HANAMI +3 more
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Effects of Echo Time on NMR Apparent Porosity and Correction Methods
Chinese Journal of Magnetic Resonance, 2020 In order to study the effect of echo time (TE) on nuclear magnetic resonance (NMR) porosity in tight oil (gas) and shale reservoir, multi-TE NMR experiments and NMR numerical simulations were performed on CuSO4 solutions with specific transversal ...
ZHANG Gong +3 more
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Scientific Reports, 2021 The studies of molecular dynamics in the vicinity of liquid–glass transition are an essential part of condensed matter physics. Various experimental techniques are usually applied to understand different aspects of molecular motions, i.e., nuclear ...
K. L. Ngai, Z. Wojnarowska, M. Paluch
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Determination of the aromatics content in mineral oils by LF NMR
Учёные записки Казанского университета: Серия Естественные науки, 2023 Molecular group composition analysis of mineral oils is helpful to predict the performance of a future lubricant and to assess the compatibility of plasticizer oil with rubbers.
M.G. Fazlyyyakhmatov +6 more
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