The use of oxygen-l7-enriched water as a relaxation agent provides a convenient means to suppress the water peak in proton NMR spectra. Results of using oxygen-I7-enriched water to study the proton NMR of an aqueous solution of angiotensin 11 acetate are presented. The Carr-Purcell-Meiboom-...
HOD Peaks - NMR spectra of “neat” deuterated solvent always exhibit a peak due to H20 in ...
The proton chemical shift of water was studied as a function of the concentration of three negatively charged surfactants (sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, and sodium perfluorooctanoate) and the deuterium content of the solvent. The effect of the simple presence of ionic head gr...
Water uptake in vesicles and subsequent exchange between water protons and amide -NH protons in amino acids can be followed by a new, highly sensitive, avatar of magnetic resonance spectroscopy: dynamic nuclear polarisation (DNP)-enhanced NMR in the liquid state. Water hydrogen atoms are detected ...
Effect of pH on water proton NMR relaxation in agmatine-containing poly(amidoamine) hydrogels 来自 ACS 喜欢 0 阅读量: 34 作者:L Calucci,C Forte,I Gerges,E Ranucci 摘要: Transverse and longitudinal relaxation times of water protons were measured and magnetization transfer experiments were performed...
water proton T1 in blood from healthy volunteers and patients with acute leukaemia, lymphoma; iron deficiency anaemia, post hepatitic cirrhosis and tuberculosis, was measured by a FT-NMR spectrometer. Relaxation measurements were performed at 60MHz frequency and a temperature of (20 卤 0.5)C. The...
ChemInform Abstract: PROTON NMR STUDIES OF ION EXCHANGE RESINS IN LIGHT AND HEAVY WATERmagnetic resonance, nuclear quadrupole resonance (solids and liquids)No abstract is available for this article.doi:10.1002/chin.198018010A. + KELLOMAEKIR. KESKINEN...
The proton relaxation behavior of dietary fibers on 1H-NMR was investigated with water systems before and after heat treatment at 85 degrees C for 30 min. Quite similar spin-spin relaxation curves were observed for dietary fibers except agar with or without heat treatment in the water system. ...
NMRMeiboom dispersion/ A7660E Relaxation effects (condensed matter NMR)The temperature dependence of the proton spin-spin relaxation rate 1/ T 3 on 180° pulse spacing (Meiboom dispersion) was measured for pure water enriched at 4% 17O to obtain the proton exchange time. At 58°C, the ...
The work reported here has comprehensively determined the short-term and long-term precision of cerebral in vivo and in vitro metabolite peak area ratios (NAA/Cho, NAA/Cr + PCr, Cho/Cr + PCr) and water referenced metabolite peak areas (NAA/H2O, Cr + PCr/H2O, Cho/H2O) from single voxel...