Results 121 to 130 of about 2,750 (239)

Hydrogenation Reaction on Pd-Cu Bimetallic Catalysts: A Parahydrogen-Induced Polarization Study

Chinese Journal of Magnetic Resonance, 2018
Hydrogenation reaction of propyne on Pd-Cu bimetallic catalysts was studied using the heterogeneous parahydrogen-induced polarization (PHIP) nuclear magnetic resonance (NMR) technique.
WANG Wei-yu, HU Han, XU Jun, DENG Feng
doaj   +1 more source

Catalytic hydrogenation with parahydrogen: a bridge from homogeneous to heterogeneous catalysis

, 2020
One of the essential themes in modern catalysis is that of bridging the gap between its homogeneous and heterogeneous counterparts to combine their individual advantages and overcome shortcomings.
K. Kovtunov, O. G. Salnikov, I. V. Skovpin, N. Chukanov, D. B. Burueva, I. Koptyug   +5 more
semanticscholar   +1 more source

MRI of Heterogeneous Hydrogenation Reactions Using Parahydrogen Polarization [PDF]

, 2008
The power of magnetic resonance imaging (MRI) is its ability to image the internal structure of optically opaque samples and provide detailed maps of a variety of important parameters, such as density, diffusion, velocity and temperature. However, one of
Burt, Scott R., Burt, Scott R
core   +1 more source

Parahydrogen-based NMR signal amplification by reversible exchange (SABRE): Recent advances and applications

Mendeleev communications (Print), 2023
O. G. Salnikov, D. B. Burueva, I. V. Skovpin, I. Koptyug   +3 more
semanticscholar   +1 more source

A study on diffusion of H atoms in solid parahydrogen

, 2003
Diffusion of hydrogen atoms in solid parahydrogen was investigated using high-resolution infrared spectroscopy. Hydrogen atoms were produced as by-products of a photoinduced reaction of nitric oxides embedded in solid parahydrogen.
Takamasa Momose, Mizuho Fushitani
core   +1 more source

Measurement of the weak nucleon-nucleon interaction by polarized cold neutron capture on protons

EPJ Web of Conferences, 2014
The NPDGamma Experiment at the Spallation Neutron Source at Oak Ridge National Laboratory is measuring the parity-odd correlation between the neutron spin and the direction of the emitted photon in the capture of polarized cold neutrons on protons.
Alarcon R., Blyth D.
doaj   +1 more source

Overtone spectra of parahydrogen and orthodeuterium in the liquid phase

, 2000
We report the results of our observations of liquid parahydrogen in the mid-infrared and of liquid parahydrogen and orthodeuterium in their first and second overtone regions using a Bruker IFS 120 HR Fourier transform spectrometer.
M Mengel, B P Winnewisser, M Winnewisser
core   +1 more source

Improved 2D hydride detection for NMR-chemosensing via p‐H2 Hyperpolarization

Journal of Magnetic Resonance Open
2D NMR zero-quantum spectroscopy offers a robust and convenient way to resolve hydride resonances in non-hydrogenative ParaHydrogen Induced Polarization experiments.
Ruud L.E.G. Aspers, Marco Tessari
doaj   +1 more source

Current state of the art of analyte scope in urine metabolome analysis by non-hydrogenative PHIP

Journal of Magnetic Resonance Open
Non-hydrogenative PHIP (nh-PHIP) is an NMR signal enhancement technique that offers several orders of magnitude gains in detection sensitivity. It is one of the few hyperpolarization methods that have been demonstrated to be applicable to chemical ...
Nele Reimets, Kerti Ausmees, Indrek Reile   +2 more
doaj   +1 more source

Formulation of a nonanalytic equation of state for parahydrogen

Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1969
A method is described for building an equation of state which gives an infinite specific heat C v at the critical point approached from the one-phase domain. Interpolated PVT data are used on isochores up to 100 K at densities to the liquid triple point.
openaire   +2 more sources