Results 61 to 70 of about 2,750 (239)

Muonium hydride: The lowest density crystal

Physical Review Research, 2021
A muonium hydride molecule is a bound state of muonium and hydrogen atoms. It has half the mass of a parahydrogen molecule and very similar electronic properties in its ground state.
Youssef Kora, Massimo Boninsegni, Dam Thanh Son, Shiwei Zhang   +3 more
doaj   +1 more source

Representation of population exchange at level anti-crossings [PDF]

Magnetic Resonance, 2020
A theoretical framework is proposed to describe the spin dynamics driven by coherent spin mixing at level anti-crossings (LACs). We briefly introduce the LAC concept and propose to describe the spin dynamics using a vector of populations of the diabatic ...
B. A. Rodin, B. A. Rodin, K. L. Ivanov, K. L. Ivanov   +3 more
doaj   +1 more source

Technologies and Strategies for Metabolic and Molecular Imaging With Hyperpolarized MRI. [PDF]

J Magn Reson Imaging
ABSTRACT Conventional Magnetic Resonance Imaging (MRI) offers limited sensitivity for direct metabolic and molecular imaging using non‐proton nuclei due to low thermal nuclear spin polarization. Hyperpolarization (HP) technologies increase nuclear spin polarization by several orders of magnitude, overcoming this limitation to enable in vivo studies of ...
Khan AS, Laustsen C.
europepmc   +2 more sources

Rapid Fragment Screening by 19F Steady‐State Free Precession NMR

Angewandte Chemie, EarlyView.
19F$^{19}{\rm F}$ SSFP NMR is a broadband and very sensitive experiment for detecting protein–ligand interactions. The method enables rapid fragment screening at low micromolar protein concentrations, even for challenging drug targets such as intrinsically disordered proteins.
Laura Ruduša, Sintija Ozola, Kostiantyn P. Melnykov, Yaroslav I. Filatov, Serhiy V. Ryabukhin, Raitis Bobrovs, Dmytro M. Volochnyuk, Kristaps Jaudzems, Rihards Aleksis   +8 more
wiley   +2 more sources

Constant-adiabaticity ultralow magnetic field manipulations of parahydrogen-induced polarization: application to an AA'X spin system. [PDF]

Physical Chemistry, Chemical Physics - PCCP, 2021
The field of magnetic resonance imaging with hyperpolarized contrast agents is rapidly expanding, and parahydrogen-induced polarization (PHIP) is emerging as an inexpensive and easy-to-implement method for generating the required hyperpolarized ...
Bogdan A. Rodin, James Eills, R. Picazo-Frutos, K. Sheberstov, D. Budker, K. Ivanov   +5 more
semanticscholar   +1 more source

Branching-chain propagation of parahydrogen-derived nuclear spin order on a catalyst surface

, 2023
When a parahydrogen molecule dissociates on a surface of a heterogeneous catalyst (e.g., of a metal nanoparticle), the correlation of the nuclear spins initially inherited by the two surface H atoms may be shared with other surface hydrogens as they ...
Oleg G., Salnikov, Ekaterina V., Pokochueva, Dudari B., Burueva, Igor V., Koptyug   +3 more
core   +1 more source

Adiabatic Passage through Level Anticrossings in Systems of Chemically Inequivalent Protons Incorporating Parahydrogen: Theory, Experiment, and Prospective Applications

Journal of the American Chemical Society, 2022
Level anticrossings (LACs) are ubiquitous in quantum systems and have been exploited for spin-order transfer in hyperpolarized nuclear magnetic resonance spectroscopy. This paper examines the manifestations of adiabatic passage through a specific type of
M. Ferrer, E. Kuker, E. Semenova, Anghelo J Gangano, Michelle P. Lapak, Alexander J. Grenning, V. Dong, C. Bowers   +7 more
semanticscholar   +1 more source

Adiabatic approach for heteronuclear SABRE hyperpolarization at high magnetic field

Journal of Magnetic Resonance Open, 2023
Signal Amplification By Reversible Exchange (SABRE) is a technique aimed at enhancing weak NMR signals of heteronuclei by utilizing the non-equilibrium spin order of parahydrogen. SABRE polarization transfer takes place by means of metalorganic complexes
Danil A. Markelov, Vitaly P. Kozinenko, Alexandra V. Yurkovskaya, Konstantin L. Ivanov   +3 more
doaj   +1 more source

StereoPHIP: Stereoselective Parahydrogen‐Induced Polarization

Angewandte Chemie International Edition, 2023
Abstract Parahydrogen‐induced polarization (PHIP) followed by polarization transfer to 13 C is a rapidly developing technique for the generation of 13 C‐hyperpolarized substrates. Chirality plays an essential role in living systems and
Mai T. Huynh, Emily Buchanan, Sara Chirayil, Adeniyi M. Adebesin, Zoltan Kovacs   +4 more
openaire   +2 more sources

Crystal Structure of Parahydrogen [PDF]

Nature, 1930
WE have made two Debye-Scherrer films of parahydrogen cooled by helium boiling under normal pressure, yielding rather faint and granular lines. A much better intensity was obtained when the solid was irradiated at a temperature less than 2° K. The spacings which were deduced from these films cannot be explained by a simple space lattice of cubic ...
W. H. KEESOM, J. DE SMEDT, H. H. MOOT
openaire   +1 more source