✍ Scribed by Alexej Jerschow; Norbert Müller
No coin nor oath required. For personal study only.
Compensation of convection artifacts in gradient-enhanced nustronger than the effect of self-diffusion. In this article we clear magnetic resonance spectroscopy is introduced. Natural conpresent guidelines for the design of gradient sequences to vection caused by small temperature gradients over the sample avoid or compensate convection artifacts in gradient-envolume can lead to significant loss of magnetization in gradienthanced high-resolution NMR spectroscopy.
A gradient echo is obtained in an arbitrary pulse sequence its complete extinction or partial inversion. Even when the effect if the zeroth moment m 0 of the effective gradient G ଙ (t) is small, it still hampers a quantitative interpretation of spectra, vanishes (4): e.g., nuclear Overhauser effect buildup curves. By using modified pulse and gradient sequences it is possible to avoid the interference of convection, which is demonstrated by way of two examples:
[1] GOESY and GROESY. The principle of convection compensation is applicable to a wide variety of gradient-enhanced nuclear magnetic resonance experiments, in particular those where the interval The effective gradient may be written as between a defocusing and a refocusing pulsed field gradient is relatively long. ᭧ 1998 Academic Press G ଙ (t) Å p(t)rG(t),
📜 SIMILAR VOLUMES
## Abstract A historical overview of the role of NMR spectroscopy in macromolecular science in general and its coverage in “__Macromolecular Chemistry and Physics__” in particular is given. In the early days physics‐application to study molecular dynamics, partial alignment of macromolecules and ph
Self-association of metal-free human insulin in aqueous solution at pH 9.4 has been studied using pulsedfield gradient (PFG) NMR spectroscopy. The diffusion coefficients were measured for two different insulin concentrations, \(0.72 \mathrm{~mm}\) in which the dimer is the predominant species and \(
## Abstract ^13^C chemical shifts are reported for a series of 2‐substituted 1,3‐dimethylbenzenes: comparisons of these values with those for the corresponding monosubstituted benzenes reveal, in some cases, large differences in the __para__‐carbon substituent chemical shifts, which are attributabl