Showing papers in "Journal of Magnetic Resonance in 1985"

TL;DR: In this article, a new mixing scheme based on the MLEV-16 composite pulse decoupling cycle (II) was proposed, which is less sensitive to pulse imperfections and provides net magnetization transfer over a substantial bandwidth with only limited rf power.

TL;DR: In this paper, the authors proposed a new method for measuring homonuclear NOE effects under spin-locked conditions, which they referred to as rotatingframe Overhauser enhancement spectroscopy (ROESY) since this name suggests a similarity with the closely related 2D NOESY experiment.

TL;DR: In this paper, the WALTZ-16 decoupling scheme was used for carbon-l 3 linewidth modulation with a 40% improvement in bandwidth over the original Waltz-16.

TL;DR: Optimisation de lhomogeneite du champ radiofrequence necessaire pour produire des sequences d'impulsions a multichocs and du rapport signal sur bruit.

TL;DR: A new method for quantitative analysis of time-domain signals that is insensitive to truncation at the beginning and/or the end of the signal, and is capable to accurately reconstruct the missing part, and achieves higher resolution than fast Fourier transformation.

TL;DR: In this paper, the effect of molecular self-diffusion on NMR images of phantoms was demonstrated for the first time using stimulated-echo (STE) NMR signals.

TL;DR: In this paper, the feasibility of doubly relayed magnetizatioin transfer experiments is discussed and demonstrated for a sample of gramacidin-S and for the trinucleotides A2′--5′A2′-5A.

TL;DR: In this article, a comparison of experimental imaging results obtained with linearly polarized and circularly polarized radiofrequency excitation and reception is presented, and the expected benefits of circular polarization over linear polarization in reduction of excitation power (up to 50% reduction) and signal-to-noise advantage (√ 2) have been realized in practice with cylindrical objects and human subjects.

TL;DR: In this article, a new form of NMR imaging using stimulated echoes is described, dubbed STEAM (sti modulated e cho acquisition m ode) imaging, which turns out to become a versatile tool for multipurpose NMR images.

TL;DR: In this article, two new methods of discriminating between positive and negative ω1 frequencies in two-dimensional correlation spectra were developed which allow spectra with pure absorption lineshapes to be obtained.

TL;DR: Composite pulses for broadband spin excitation over large ranges of radiofrequency field amplitudes and resonance offsets are presented in this paper. But they do not introduce a strong dependence of the NMR signal phase on the rf amplitude or resonance offset, overcoming a common problem of composite pulses derived by other means.

TL;DR: In this article, a parallel LC trap in series with the usual tuning capacitor was proposed for double tuning NMR probes, which provides both resonances to a single input, creating an ideal probe for concurrent 31 P and 1 H NMR.

TL;DR: Scheek et al. as mentioned in this paper used 2D NOE spectroscopy to identify the resonances of water-exchangeable imino protons in NMR spectra of oligonucleotides.

TL;DR: In this article, the maximum entropy method (MEM) is used to analyze free induction decay data, which does not introduce more structure into the resulting spectrum than is required to fit the FID.

TL;DR: In this paper, the variable nutation angle (VNA) method was evaluated for the measurement of NMR spin-lattice relaxation times and the sensitivity of the deduced T1′s to these conditions was explored.

TL;DR: In this paper, the phase of the cross peak in a spin-locked NOE experiment can be used to discriminate between NOE and exchange, which is different from zz spectroscopy, recently introduced by Bodenhausen et al.

TL;DR: In this article, a matching circuit for NMR coils for in vivo experiments is described, which uses an inductive coupling of the NMR coil to the transmitter-receiver.

TL;DR: In this article, the authors propose l'utilisation d'une impulsion composite de 90°, tres sensible a la force du champ radiofrequence, which can be used to solve the problem.

TL;DR: In this paper, an optimization procedure is described for NMR techniques that require signal averaging of expts. with a variable time delay, either for the suppression of artifacts or for the optimization of coherence transfer over a given frequency range.

TL;DR: In this article, a new technique for chemical-shift-selective (CHESS) NMR imaging is described which enables cross-sectional imaging of positively selected, i.e., frequencyselective excited, resonance lines.

TL;DR: In this paper, the authors used the nuclear Overhauser effect (NOE) to demonstrate the proximity of two protons in space and to determine their separation (I-IO).

TL;DR: On presente la methode LPQRD basee sur la prediction lineaire et the decomposition par triangulation d'Householder based on la predictions lineaire and la decomposition d'householder.

TL;DR: In this article, it is shown that a multisite exchange problem can first be reduced effectively to a two-site exchange, and a single rate constant can subsequently be measured simply and unequivocally.

TL;DR: In this article, a Fourier series window approach is employed in conjunction with surface coils to accomplish one-dimensional spatial localization of phosphorus-containing metabolites in phantoms and the in vivo rat brain.

TL;DR: In this article, a data handling technique known as the maximum entropy method (I-3) (MEM) was proposed to handle free induction decay in two-dimensional NMR and NMR imaging.

TL;DR: In this paper, the maximum entropy method has been applied to two-dimensional NMR data and it has been shown that it can lead to sensitivity improvements, reduction of instrumental artifacts, and shortened data acquisition times.

TL;DR: An exact expression for the overall rotation generated by two or three consecutive noncommuting rotations is used for the analysis of several known composite pulse sequences and recursive expansion procedures in this paper, and analytical expressions for the dependence of spin inversion on radiofrequency field strength are given.

TL;DR: In this paper, the EPR linewidth is derived from a distribution in the effective g value as a function of (a) the joint distribution function of the elements of the p tensor and (b) the spatial relationship between the two principal axis systems involved.