Publications by Sami Jannin | EPFL Graph Search

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Dynamic Nuclear Polarization (DNP) induced by saturation of ESR transitions of TEMPO at 1.2 K and 3.35 T is characterized by build-up rates that are typically 5 times faster for protons than for the carboxylic carbon-13 in acetate. We show that cross polar ...

To shield solutions carrying hyperpolarized nuclear magnetization from rapid relaxation during transfer through low fields, the transfer duct can be threaded through an array of permanent magnets. The advantages are illustrated for solutions containing hyp ...

At natural C-13 abundance, metabolomics based on heteronuclear NMR is limited by sensitivity. We have recently demonstrated how hyperpolarization by dissolution dynamic nuclear polarization (D-DNP) assisted by cross-polarization (CP) provides a reliable wa ...

A Method for nuclear magnetic resonance (NMR) spectroscopy of a sample comprising the following steps: (a) excitation of long lived coherences (LLC) between the singlet state So and the central triplet state To of nuclei of the sample by initiating irradia ...

We have induced hyperpolarized long-lived states in compounds containing C-13-bearing methyl groups by dynamic nuclear polarization (DNP) at cryogenic temperatures, followed by dissolution with a warm solvent. The hyper polarized methyl long-lived states g ...

Dissolution dynamic nuclear polarization (D-DNP) has become a method of choice to enhance signals in nuclear magnetic resonance (NMR). Recently, we have proposed to combine cross-polarization (CP) with D-DNP to provide high polarization P(C-13) in short bu ...

We present novel means to hyperpolarize deuterium nuclei in (CD2)-C-13 groups at cryogenic temperatures. The method is based on cross-polarization from H-1 to C-13 and does not require any radio-frequency fields applied to the deuterium nuclei. After rapid ...

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 ...

Natural abundance C-13 NMR spectra of biological extracts are recorded in a single scan provided that the samples are hyperpolarized by dissolution dynamic nuclear polarization combined with cross polarization. Heteronuclear 2D correlation spectra of hyper ...

Sami Jannin

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Low-temperature cross polarization in view of enhancing dissolution Dynamic Nuclear Polarization in NMR

A magnetic tunnel to shelter hyperpolarized fluids

Highly Repeatable Dissolution Dynamic Nuclear Polarization for Heteronuclear NMR Metabolomics

Procédé de spectroscopie RMN avec dégradations d'induction prolongée de cohérences aux temps de vie longs

Dynamic Nuclear Polarization of Long-Lived Nuclear Spin States in Methyl Groups

Microwave-gated dynamic nuclear polarization

Dissolution dynamic nuclear polarization of deuterated molecules enhanced by cross-polarization

Boosting Dissolution Dynamic Nuclear Polarization by Cross Polarization

Hyperpolarized NMR of plant and cancer cell extracts at natural abundance

In Vivo Detection of Hyperpolarized 15N Choline in the Rat