PatentDOI
Adiabatic pulses for wideband inversion and broadband decoupling
TLDR
In this article, an inversion pulse for wideband application is obtained from a simple nonlinear amplitude modulation wherein the amplitude is modulated in accord with A(t)=A 0 {1-| sin βt| n } and the entire pulse is frequency modulated such that the phase varies as φ(t) =φ 0 + 1/2 kt 2About:
This article is published in Journal of Magnetic Resonance, Series A.The article was published on 1996-07-26. It has received 538 citations till now. The article focuses on the topics: Amplitude modulation & Amplitude.read more
Citations
More filters
Journal ArticleDOI
Ultra-wideline 14N NMR spectroscopy as a probe of molecular dynamics
TL;DR: It is shown that ultra-wideline solid-state NMR can be used as a quantitative probe of molecular dynamics and jump rates for the molecular flipping mechanism in crystalline urea are determined at various temperatures and are shown to be in good agreement with other NMR techniques.
Journal ArticleDOI
Extending the limits of the selective 1D NOESY experiment with an improved selective TOCSY edited preparation function
TL;DR: An improved selective TOCSY edited preparation (STEP) function and its application to the selective 1D NOESY experiment are described and it is shown that the combined use of these techniques ensures that the final spectra are free of distortions, which is crucial to the reliable detection of weak NOE enhancements.
Journal ArticleDOI
Ultrafast Magic‐Angle Spinning: Benefits for the Acquisition of Ultrawide‐Line NMR Spectra of Heavy Spin‐1/2 Nuclei
Ann-Christin Pöppler,Ann-Christin Pöppler,Ann-Christin Pöppler,Jean-Philippe Demers,Jean-Philippe Demers,Jean-Philippe Demers,Michal Malon,Amit Pratap Singh,Herbert W. Roesky,Yusuke Nishiyama,Adam Lange,Adam Lange,Adam Lange +12 more
TL;DR: The ultrafast MAS experiments provide optimal conditions for the extraction of the chemical-shift anisotropy tensor parameters, anisOTropy, and asymmetry for heavy spin-1/2 nuclei.
Journal ArticleDOI
Mixed-time parallel evolution in multiple quantum NMR experiments: sensitivity and resolution enhancement in heteronuclear NMR
TL;DR: Line shape simulations for the 1H–15N PARE indicate that this strategy significantly enhances both sensitivity and resolution in the indirect 1H dimension, and that the unusual signal decay profile results in acceptable line shapes.
Journal ArticleDOI
Effects of L-Glutamate Transport Inhibition by a Conformationally Restricted Glutamate Analogue (2S,1'S,2'R)-2-(Carboxycyclopropyl)Glycine (L-CCG III) on Metabolism in Brain Tissue In Vitro Analysed by NMR Spectroscopy
Charbel El-Hajj Moussa,Ann D. Mitrovic,Robert J. Vandenberg,Tanya Provis,Caroline Rae,William A. Bubb,Vladimir J. Balcar +6 more
TL;DR: In slices of guinea pig cerebral cortex, 5 μM L-CCG III increased both the flux of label through pyruvate carboxylase and the fractional enrichment of glutamate, GABA, glutamine and lactate, but had no effect on total metabolite pool sizes.
References
More filters
PatentDOI
Methods of, and apparatus for, proton decoupling in nuclear magnetic resonance spectroscopy
TL;DR: In this paper, a radio-frequency pulse is tuned to the frequency of the nuclear species, such as 1 H, to be decoupled or saturated and has a bandwidth adjusted to correspond to the entire chemical shift spectrum, minimizing the amount of radiofrequency power transmitted into a volume of the irradiated sample.
Patent
RF pulse cascade for the generation of NMR spectra
TL;DR: In this article, a method for generating a spectrum of NMR signals with rectangular characteristic in the frequency space by radiating a sequence of RF pulses onto a sample in the homogeneous magnetic field is presented.
PatentDOI
Method and apparatus for broadband decoupling in nuclear magnetic resonance with chirp pulses
Riqiang Fu,Geoffrey Bodenhausen +1 more
TL;DR: In this article, the authors proposed a method for broadband decoupling in nuclear magnetic resonance with chirp and other RF pulses, where the sample is placed in a static field, and a first cycle of chirps pulses are generated, followed by a second cycle of pulses generated by a supercycle of the first and second cycles.
Patent
Method for exciting transverse magnetization in magnetic resonance
TL;DR: In this article, a method for exciting transverse magnetization by irradiating a nuclear spin system subjected to a constant magnetic field with a frequency-modulated rf-pulse ("chirp"-pulse) and with a further frequency-modified rfpulse (further chirppulse), for refocusing the magnetization, is characterized in that the rf pulse-(P1) and the further pulse (P2) overlap each other in time at least partially.
PatentDOI
Method for determining optimized radio-frequency pulse shapes for selective excitation in magnetic resonance spectroscopy and imaging
TL;DR: In this paper, a spin system with a frequency-selective radio-frequency (RF) pulse was used for magnetic resonance spectroscopy and imaging, and the shape of the pulse was optimized.
Related Papers (5)
Broadband and adiabatic inversion of a two-level system by phase-modulated pulses.
The Return of the Frequency Sweep: Designing Adiabatic Pulses for Contemporary NMR
Michael Garwood,Lance DelaBarre +1 more
Effects of Diffusion on Free Precession in Nuclear Magnetic Resonance Experiments
H. Y. Carr,Edward M. Purcell +1 more