Publication

Hyperpolarized NMR of plant and cancer cell extracts at natural abundance

Publications associées (34)

Nuclear overhauser spectroscopy of chiral CHD methylene groups

Nuclear magnetic resonance spectroscopy (NMR) can provide a great deal of information about structure and dynamics of biomolecules. The quality of an NMR structure strongly depends on the number of experimental observables and on their accurate conversion ...

Springer Verlag2016

De l'usage des protons hyperpolarisés pour augmenter la sensibilité de la RMN

Aurélien Bornet

Nuclear Magnetic Resonance (NMR) has become an inescapable technique for spectroscopic identification. Its main advantage comes from the sensitivity of NMR active nuclei embedded in a molecule to their chemical environment. NMR is also used daily in medica ...

EPFL2015

Nuclear polarization by optical pumping in InP:Fe above liquid nitrogen temperature

Jean-Philippe Ansermet, Murari Soundararajan, Dongyoung Yoon

Hyperpolarized nuclear spins are observed in optically pumped iron-doped InP from 70 K to 140 K. P-31 NMR was carried out at 9.28 T (159.8 MHz) during optical excitation with circularly polarized light, using a laser diode (lambda-830 nm) as a source. The ...

Academic Press Inc Elsevier Science2015

Dynamic nuclear polarisation enhanced N-14 overtone MAS NMR spectroscopy

David Lyndon Emsley, Aaron James Rossini

Dynamic nuclear polarisation (DNP) has been used to obtain magic angle spinning (NOT)-N-14 (nitrogen-14 overtone) solid-state NMR spectra from several model amino acids, with both direct and indirect observation of the (NOT)-N-14 signal. The crystalline so ...

2014

Decoupling of Magnetic Resonance Signals in Time and Frequency Domain

Nuclear magnetic resonance (NMR) was discovered in the first half of the 20th century. Today, neither analytical chemistry without NMR spectroscopy nor medical diagnostics without magnetic resonance imaging (MRI) could be imagined. A magnetic resonance sig ...

EPFL2013

Boosting Dissolution Dynamic Nuclear Polarization by Cross Polarization

Geoffrey Bodenhausen, Aurélien Bornet, Sami Jannin

The efficiency of dissolution dynamic nuclear polarization can be boosted by Hartmann-Hahn cross polarization at temperatures near 1.2 K. This enables high throughput of hyperpolarized solutions with substantial gains in buildup times and polarization leve ...

Amer Chemical Soc2013

Dynamic Studies through Control of Relaxation in NMR Spectroscopy

Nicola Salvi

In numerous biological processes that constitute the base of living organisms, protein function is fundamentally related to internal dynamics occurring on μs-ms time scales that can give rise to chemical exchange contributions to relaxation. In a heteronuc ...

EPFL2013

Improving Sensitivity in Solid State NMR

Sensitivity in Nuclear Magnetic Resonance (NMR), especially in solid-state NMR, has always been a challenging and important issue and thus a motivation for new developments. The magnetic field B0, the gyromagnetic ratios of the observed nuclei, as well as ...

EPFL2012

Dynamic nuclear polarization of quadrupolar nuclei using cross polarization from protons: surface-enhanced aluminium-27 NMR

David Lyndon Emsley, Geoffrey Bodenhausen, Pascal Miéville, Aaron James Rossini, Moreno Lelli, Diego Carnevale, Marc Anthony Caporini, David Benjamin Roger Antoine Gajan

The surface of gamma-alumina nanoparticles can be characterized by dynamic nuclear polarization (DNP) surface-enhanced NMR of Al-27. DNP is combined with cross-polarization and MQ-MAS to determine local symmetries of Al-27 sites at the surface. ...

2012

Control of Cross Relaxation of Multiple-Quantum Coherences Induced by Fast Chemical Exchange under Heteronuclear Double-Resonance Irradiation

Geoffrey Bodenhausen, Simone Ulzega, Nicola Salvi, Fabien Ferrage

A fully analytical description of the control of the cross-correlated cross relaxation of multiple-quantum coherences in the presence of local dynamics under heteronuclear double-resonance radio-frequency (RF) irradiation is presented. The contribution of ...

2011

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