Showing papers in "Journal of Magnetic Resonance in 1986"

TL;DR: In this paper, a simple method that alleviates the dynamic range problem and that facilitates the suppression of signals from protons that are not coupled to the lowy nucleus is described, where the low-y nucleus was assumed to be 13C.

TL;DR: A new method for rapid NMR imaging dubbed FLASH ( fast low-a ngle sh ot) imaging is described which allows measuring times of the order of 1 s (64 × 128 pixel resolution) or 6 s (256 × 256 pixels), resulting in about a 100-fold reduction in measuring time without sacrificing spatial resolution.

TL;DR: In this article, a spatial localization method for in vivo spectroscopic investigation of biological and medical samples is described, which overcomes most of the technical problems associated with localized NMR spectroscopy and allows the spectrum to be investigated from a cube which can be positioned by reference to an NMR image.

TL;DR: In this article, a general procedure is proposed, which allows the transtormation of most of the homonuclear two-dimensional NMR techniques into one-dimensional sequences by using semiselective Gaussian pulses.

TL;DR: In this paper, the authors demonstrate that the use of 'H-detected heteronuclear RELAY spectroscopy is readily possible, providing an improvement in sensitivity of at least an order of magnitude over experiments that u t k e I3C detection.

TL;DR: In this paper, a two-pulse spin-echo sequence was used to obtain relatively undistorted second-order powder pattern spectra of the nonintegral spin quadrupolar nuclei 39 K and 67 Zn, in solids.

TL;DR: In this paper, high-resolution sample-spinning phosphorus-31 NMR spectra of a variety of orthophosphates and derived chemical-shift tensor elements and anisotropies from spinning-sideband patterns were obtained.

TL;DR: In this article, the authors presented a method of analyzing relaxation decay curves in terms of continuous distributions of relaxation times, rather than depending on a priori assumptions, the experimental data determine the number and character of the components.

TL;DR: Methode for reduire les champs magnetiques etrangers qui se situent a l'exterieur du volume actif des systemes de bobines a gradient du champ.

TL;DR: In this article, the results of a study aimed at determining the optimum conditions for obtaining well-resolved boron-l 1 MASS NMR spectra of a wide range of borates and borosilicates were presented.

TL;DR: In this article, a phase-cycling and pulse swapping technique was proposed to eliminate unwanted echoes and FIDs in three-pulse electron spin-echo experiments and allow the measurement of the envelope of the stimulated echo as a function of the time τ′ for 0.

TL;DR: In this paper, a general method for evaluating rate constants in complex exchange networks with N-sites from two-dimensional EXSY (NOESY) NMR spectra is proposed.

TL;DR: In this article, the authors describe methods used in the quantitative analysis and interpretation of two-dimensional nuclear Overhauser enhancement spectra, taking multispin effects such as spin diffusion into account in the analysis.

TL;DR: X and X half-filters have the advantage of providing two subspectra corresponding, respectively, to the X-labeled 'H peaks and to all other peaks and the sensitivity of the corresponding half-filter is improved by a factor 2, compared to the heteronuclear zero-quantum filter.

TL;DR: La methode est utilisee dans la restauration de spectres haute resolution obtenus a partir de volumes localises par l'utilisation de gradients de champs magnetiques et d'impulsions radiofrequences selectives.

TL;DR: In this article, the authors report microscopic imaging studies carried out at 60 MHz on both phantom and plant stem samples in which the transverse resolution is 25 pm. And they use a slice thickness of 1.5 mm to take advantage of the existing longitudinal symmetry.

TL;DR: A mathematical treatment of multiple-quantum nuclear magnetic resonance (MQ NMR) for I = 1, based on irreducible tensor operators, is presented and discussed in this article.

TL;DR: De nouvelles formes d'impulsions de 180° fortement selectives ont ete obtenues en appliquant les methodes descentes du gradient conjugue a un probleme de commande optimale non lineaire.

TL;DR: In this article, a method for obtaining two-dimensional NMR images of solids using multiple-pulse line narrowing is proposed, which is adaptable to any fast recovery solid-state spectrometer having 2D FT NMR software and provisions for applying magnetic gradients.