Results 41 to 50 of about 4,129 (201)
Hyperpolarized ^1H NMR employing low γ nucleus for spin polarization storage [PDF]
, 2009 The PASADENA (parahydrogen and synthesis allow dramatically enhanced nuclear alignment)(1, 2) and DNP (Dynamic Nuclear Polarization)(3) methods efficiently hyperpolarize biologically relevant nuclei such as 1^H, (31)^P, (13)^C, (15)^N achieving signal ...
Bhattacharya, Pratip K. +3 more
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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 +3 more
doaj +1 more source
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
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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 +4 more
openaire +2 more sources
Design of the Reactor, Selection of Catalyst for Ortho to Para Hydrogen Conversion and Preliminary Design of Cryogenic System for its Liquefaction [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2004 Hydrogen is an unusual substance in that its molecule exists in two forms, known as ortho and para, with markedly different properties. Energy level of the ortho molecule is higher than para, therefore, the latter is employed for industrial purposes ...
Naser Saghatoleslami +2 more
doaj
Journal of Magnetic Resonance Open, 2023 Hyperpolarization chemistry based on reversible exchange of parahydrogen, also known as Signal Amplification By Reversible Exchange (SABRE), is a particularly simple approach to attain high levels of nuclear spin hyperpolarization, which can enhance NMR ...
Keilian MacCulloch +11 more
doaj +1 more source
Pair potentials and equation of state of solid parahydrogen to megabar pressure
, 2013 We compute by means of Quantum Monte Carlo simulations the equation of state of bulk solid {para}hydrogen extrapolated to zero temperature, up to a pressure of ~ 2 MBar.
Boninsegni, Massimo, Omiyinka, Tokunbo
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Angewandte Chemie, Volume 138, Issue 4, 22 January 2026.Diazirines are three‐membered, nitrogen‐containing heterocycles that decompose under light or heat to generate carbenes. For the past two decades, they have served mainly as minimally invasive tags in photoaffinity labeling (PAL). More recently, their value as versatile carbene precursors has been recognized.
Dominik Schnalzer +4 more
wiley +2 more sources
Journal of Magnetic Resonance Open, 2023 In this work, we describe essential tools of linear algebra necessary for calculating the effect of chemical exchange on spin dynamics and polarization transfer in various nuclear magnetic resonance (NMR) experiments.
Jingyan Xu, Danila A. Barskiy
doaj +1 more source
Population size bias in Diffusion Monte Carlo
, 2012 The size of the population of random walkers required to obtain converged estimates in DMC increases dramatically with system size. We illustrate this by comparing ground state energies of small clusters of parahydrogen (up to 48 molecules) computed by ...
Boninsegni, Massimo, Moroni, Saverio
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