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Sources of sensitivity losses in ultrafast 2D NMR
Journal of Magnetic Resonance, 2008Recent ultrafast techniques make it possible to obtain nD NMR spectra in a single scan. However, an important sensitivity decrease is observed when the excitation duration is increased, which is necessary to improve resolution. A detailed, theoretical and experimental study of sensitivity losses in ultrafast experiments is carried out on the example of
Patrick, Giraudeau, Serge, Akoka
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ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
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AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
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Science, 2003
Multidimensional Fourier transform methods can simplify and manipulate magnetic resonance spectra, helping to determine the structures of large biomolecules. Researchers are also exploiting the shorter wavelengths of visible and infrared light to determine instantaneous molecular structures.
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Multidimensional Fourier transform methods can simplify and manipulate magnetic resonance spectra, helping to determine the structures of large biomolecules. Researchers are also exploiting the shorter wavelengths of visible and infrared light to determine instantaneous molecular structures.
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Classification of Italian Honeys by 2D HR-NMR
Journal of Agricultural and Food Chemistry, 2008The importance of honey has been recently increased because of its nutrient and therapeutic effects, but the adulteration of honey in terms of botanical origin has increased, too. The floral origin of honeys is usually determined using melisso-palynological analysis and organoleptic characteristics, but the application of these techniques requires some
LOLLI, Massimo +4 more
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Single‐Scan 2D Hadamard NMR Spectroscopy
Angewandte Chemie International Edition, 2009AbstractScan and deliver: By combining imaging‐based spectral/spatial 2D radiofrequency manipulations (see scheme, left) with Hadamard‐weighting principles, 2D NMR spectra can be retrieved within a single scan (right). This approach can give homo‐ or heteronuclear correlations with an enhanced sensitivity over conventional ultrafast 2D NMR spectroscopy.
Assaf, Tal +2 more
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Spectroscopy Letters, 1989
Abstract Two Dimensional COSY and HETCOR experiments have been performed on the alkaloid vindoline which allow the complete 1zH and 13C spectral assignments to be made. Proton-proton and proton-carbon coupling constants are also given.
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Abstract Two Dimensional COSY and HETCOR experiments have been performed on the alkaloid vindoline which allow the complete 1zH and 13C spectral assignments to be made. Proton-proton and proton-carbon coupling constants are also given.
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Line shape considerations in ultrafast 2D NMR
Journal of Magnetic Resonance, 2004We have recently proposed and demonstrated an approach that enables the acquisition of 2D nuclear magnetic resonance (NMR) spectra within a single scan. The approach is based on spatially encoding the spins' evolution along the indirect domain with the aid of a magnetic field gradient, and subsequently decoding this information numerous times over the ...
Boaz, Shapira +3 more
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A 2D NMR method to study peptide phosphorylation
Analytical and Bioanalytical Chemistry, 2007We demonstrate a 2D NMR method which distinguishes between phosphorylated and non-phosphorylated amino acids. The method is capable of monitoring the amino acid and site-specific enzymatic phosphorylation and dephosphorylation of peptides. The method was developed using O-phosphorylated amino acids and its potential is shown with a peptide fragment of ...
Christian, Raeck, Stefan, Berger
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Direct detection of connectivities in glasses by 2D NMR
Journal of Non-Crystalline Solids, 1994Abstract 31 P two-dimensional (2D) nuclear magnetic resonance (NMR) is proposed a powerful tool for direct investigation of the connectivities between like or different Q n units in glasses or the medium-range order. The entire experiment was carried out under conditions of fast magic angle sample spinning (MAS).
Jäger, C. +3 more
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Evaluation of Ultrafast 2D NMR for Quantitative Analysis
Analytical Chemistry, 2008Recent ultrafast methods make it possible to obtain two-dimensional (2D) nuclear magnetic resonance (NMR) spectra in a fraction of a second. 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 ...
Giraudeau, Patrick +2 more
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