Nearly 106-fold enhancements in intermolecular 1H double-quantum NMR experiments by nuclear hyperpolarization

Mishkovsky, Mor; Eliav, Uzi; Frydman, Lucio

doi:10.1016/j.jmr.2009.06.002

Cited by 32 publications

(21 citation statements)

References 34 publications

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“…The UfiDQCJRES method proves free of specialized hardware requirements and is more suitable for cases where the objective semisolid biological food should be kept intact during the whole NMR acquisition, complementing traditional NMR methods, such as the MAS technique and extraction method. Further combination with hyperpolarization (Branca et al 2011;Mishkovsky et al 2009) and higher magnetic fields may improve the SNR of the UfiDQCJRES method.…”

Section: Resultsmentioning

confidence: 99%

Two-Dimensional J-Resolved NMR Analyses of Fish and Its Products via Spatially Encoded Intermolecular Double-Quantum Coherences

et al. 2015

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Nuclear magnetic resonance (NMR) spectroscopy provides a powerful tool for food analyses due to its highthroughput information related to component analyses and its non-invasive property without altering detected samples. Current liquid NMR approaches, however, are subject to the influence of field inhomogeneity in direct measurements of biological foods, generally resorting to techniques of tissue extractions or magic-angle spin to eliminate the inhomogeneity. Therefore, we propose an NMR approach based on intermolecular double-quantum coherences (iDQCs) and spatial encoding technique to fast recover high-resolution two-dimensional (2D) J-resolved spectra in inhomogeneous fields. Inheriting from the immunity to field inhomogeneity of iDQCs and the enhancement in acquisition efficiency of the spatial encoding technique, the proposed method can resist the field inhomogeneity in biological foods without superfluous pretreatments and time-consuming shimming procedures, and yield satisfactory 2D J-resolved information for analyses within minutes. Fish and its products, which are closely related to human daily life, capture extensive attentions with the rapid development of the aquaculture. At first, experiments on cod liver oils are implemented in a purposely deshimmed magnetic field to demonstrate the feasibility of the proposed approach. Then, caviars and an intact fish are tested to further show the applicability of the proposed approach for direct measurements on intact biological food samples. Herein, the proposed method may constitute an effective technique in analyzing fish and its products.

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Section: Resultsmentioning

confidence: 99%

Two-Dimensional J-Resolved NMR Analyses of Fish and Its Products via Spatially Encoded Intermolecular Double-Quantum Coherences

et al. 2015

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“…Spin echo image of the sample is shown on the top right and the localized regions of the pig brain tissue and cucumber are marked by I and II, respectively. applications may be achieved by combination with the dynamic nuclear polarization (DNP) technique [47,48].…”

Section: Resultsmentioning

confidence: 99%

Intermolecular single-quantum coherence sequences for high-resolution NMR spectra in inhomogeneous fields

Huang

Cai

Chen

et al. 2010

Journal of Magnetic Resonance

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“…However, the weakness in signal intensity is still a concern. Applications of cryoprobe and dynamic nuclear polarization [34,35] may improve the sensitivity, ensuring the serviceability of the new methods. Some other fast sampling strategies, for instance, Hardmard encoding and compressed sensing [36][37][38][39], may be introduced for further acceleration in acquisition rate.…”

Section: Discussionmentioning

confidence: 99%

Fast high-resolution J-resolved correlation spectroscopy in inhomogeneous fields

Chen¹,

Zhang²,

Cai³

et al. 2014

Chemical Physics Letters

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Nearly 106-fold enhancements in intermolecular 1H double-quantum NMR experiments by nuclear hyperpolarization

Cited by 32 publications

References 34 publications

Two-Dimensional J-Resolved NMR Analyses of Fish and Its Products via Spatially Encoded Intermolecular Double-Quantum Coherences

Two-Dimensional J-Resolved NMR Analyses of Fish and Its Products via Spatially Encoded Intermolecular Double-Quantum Coherences

Intermolecular single-quantum coherence sequences for high-resolution NMR spectra in inhomogeneous fields

Fast high-resolution J-resolved correlation spectroscopy in inhomogeneous fields

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