Results Proton Spectra(Table1).A sample of the solvent,containing1μL of TMS,1was fit run on its this spectrum we determined the chemical shifts of the solvent residual peak2and the water peak. It should be noted that the latter is quite temperature-dependent(vide infra).Also,any potential...
A sample of 0.6 mL of thesolvent, containing 1 µL of TMS,1was first run on itsown. From this spectrum we determined the chemicalshifts of the solvent residual peak 2 and the water peak.It should be noted that the latter is quite temperature‑(1) For recommendations on the ...
N-Acetyl-L-Aspartic acid: A literature review of a compound prominent in 1H-NMR spectroscopic studies of brain N-acetyl aspartic acid (NAA), discovered in 1956 by Tallan, is the major peak seen in water-suppressed NMR proton (hydrogen) spectroscopy. NAA makes up abo... DL Birken,WH Olden...
L of TMS,1 was first run on its own. From this spectrum we determined the chemical shifts of the solvent residual peak2 and the water peak. It should be noted that the latter is quite temperature(1) For recommendations on the publication of NMR data, see: IUPAC Commission on Molecular ...
Zeolites, specially the more hydrophilic aluminosilicate and the pores usually contain water molecules are readily hydrated at room temperature, under ambient conditions. Rapid exchange between the different proton species of the sample produces a peak at an average chemical shift position, precluding the...
Reports on the production and detection of intermolecular multiple-quantum coherences between bulk water and a glycoprotein fragment at modest concentration. Density matrix treatment; Distortion of peak intensities; Methods for contrast enhancement in magnetic resonance imaging....
Since the quaternary carbon C9b has a relatively long relaxation time, it gives rise to a characteristic broad peak of low intensity. Its position is little changed by substituents in the carbocyclic ring system. This position, however, is affected by protonation in the heterocyclic ring and is...
C60Ph5Cl has electrochemical properties strikingly different from pristine C-60: the cyclovoltammetric curves show that, in the first reduction peak, two e... H Lin,WM Abida,RT Sauer,... - 《Journal of the American Chemical Society》 被引量: 208发表: 2000年 Cortical bone water: in vivo...
However, the NMR derived distributions consisted of a series of narrow peaks overlapping the single broad porosimetry peak. The surface relaxation effect, and, hence, the overall pore size sensitivity, is increased by a factor of 3 when the proton frequency is decreased from 300 to 20 MHz. ...
In attempting to make the DOSY spectra quantitative we identified time domains for each of the three molecules in which the spectra showed well resolved peaks, and those in which only a single peak was evident for two of the species. The apparent mean resident times for water and t-butanol ...