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
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Journal ArticleDOI
14N magic angle spinning overtone NMR spectra
TL;DR: In this paper, the authors presented the first 14N overtone NMR spectra obtained directly under magic angle spinning conditions, where line-broadening contributions from chemical shift anisotropy and heteronuclear dipolar couplings are significantly reduced, leaving second-order quadrupolar powder patterns with narrow discontinuities that can be observed using a single excitation pulse.
Journal ArticleDOI
Evaluation of ultrafast 2D NMR for quantitative analysis.
TL;DR: This paper presents the first evaluation of ultrafast 2D NMR for quantitative analysis on the basis of optimized conditions presented in recent studies, two homonuclear ultrafast techniques, J-resolved spectroscopy and TOCSY, are evaluated on model mixtures in terms of repeatability, long time stability, and linearity.
Journal ArticleDOI
Residue-specific NH exchange rates studied by NMR diffusion experiments.
Torsten Brand,Eurico J. Cabrita,Gareth A. Morris,Robert Günther,Hans-Jörg Hofmann,Stefan Berger +5 more
TL;DR: A novel approach to the investigation of rapid (>2s(-1)) NH exchange rates in proteins, based on residue-specific diffusion measurements, which shows a good correlation with the experimentalNH exchange rates.
Journal ArticleDOI
Frequency swept microwaves for hyperfine decoupling and time domain dynamic nuclear polarization.
D. E. M. Hoff,Brice J. Albert,Edward P. Saliba,Faith J. Scott,Eric J. Choi,Michael Mardini,Alexander B. Barnes +6 more
TL;DR: Voltage tunable gyrotron oscillators are proposed as a class of frequency agile microwave sources to generate microwave frequency sweeps required for the frequency modulated cross effect, electron spin inversions, and hyperfine decoupling.
Journal ArticleDOI
14N overtone NMR spectra under magic angle spinning: experiments and numerically exact simulations.
Luke A. O'Dell,Andreas Brinkmann +1 more
TL;DR: The (14)N overtone MAS spectrum obtained from L-histidine is presented, in which powder patterns from all three nitrogen sites are clearly resolved, to demonstrate the advantages of this experimental approach.
References
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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.
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