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parahydrogen

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parahydrogen
parahydrogen (stress variable) Also para hydrogen and with hyphen. [f. para-1 3 + hydrogen, as tr. G. parawasserstoff (Bonhoeffer & Harteck 1929, in Naturwissenschaften XVII. 182/1), coined on the analogy of par(a)helium (see quot. 1935 s.v. orthohydrogen).] The form of molecular hydrogen in which t... Oxford English Dictionary
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Parahydrogen-induced polarization
Parahydrogen-induced polarization (PHIP) is a technique used in magnetic resonance imaging. wikipedia.org
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orthohydrogen
orthohydrogen (stress variable) Also ortho hydrogen and with hyphen. [f. ortho- + hydrogen as tr. G. orthowasserstoff (Bonhoeffer & Harteck 1929, in Naturwissenschaften XVII. 182/1), coined on the analogy of orthohelium (see quot. 1935).] The form of molecular hydrogen in which the two nuclei in the... Oxford English Dictionary
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Liquid hydrogen
There are two spin isomers of hydrogen; whereas room temperature hydrogen is mostly orthohydrogen, liquid hydrogen consists of 99.79% parahydrogen and Parahydrogen, in which the two nuclear spins are antiparallel, is more stable than orthohydrogen, in which the two are parallel. wikipedia.org
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Elly Schwab-Agallidis
Her most famous work concerned the properties and reactivity of parahydrogen. It was there that she met Georg-Maria Schwab, her future husband, who suggested that she examine parahydrogen and supervised her experimental work. wikipedia.org
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Spin isomers of hydrogen
Parahydrogen is in a lower energy state than is orthohydrogen. of the parahydrogen. wikipedia.org
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Karl-Friedrich Bonhoeffer
Research In 1929 Bonhoeffer, together with Paul Harteck, discovered the spin isomers of hydrogen, orthohydrogen and parahydrogen. wikipedia.org
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NPDGamma experiment
NPDGamma is an ongoing effort to measure the parity-violating asymmetry in polarized cold neutron capture on parahydrogen. Polarized neutrons of energies 2 meV – 15 meV are incident on a liquid parahydrogen target. wikipedia.org
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Varley F. Sears
In 1960, Sears obtained a Ph.D. from the University of Toronto with a thesis on The rotational absorption spectrum of solid and liquid parahydrogen. wikipedia.org
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Isomer
is significant for molecular hydrogen, which can be partially separated into two long-lived states described as spin isomers or nuclear spin isomers: parahydrogen wikipedia.org
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Zero field NMR
Examples include parahydrogen-induced polarization, spin-exchange optical pumping of noble gas atoms, dissolution dynamic nuclear polarization, and chemically-induced Pines; “Parahydrogen-enhanced zero-field nuclear magnetic resonance” Nature Physics (2011), 7, 571–575. wikipedia.org
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Paul Harteck
Wilhelm Institute for Physical Chemistry and Elektrochemistry) located in Dahlem-Berlin, where he worked with Karl Friedrich Bonhoeffer on experiments on parahydrogen wikipedia.org
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Georg-Maria Schwab
He also collaborated with his future wife Elly on her research about the influence of free radicals on parahydrogen, a work which they completed in Greece occasional topics such as inorganic chromatography (which he is credited with inventing), turn-over transitions, carbon adsorption and properties of parahydrogen wikipedia.org
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Karl P. Cohen
articles Science and science fiction of reprocessing and proliferation SciTech Connect Van der Waals' Forces and the Vapor Pressures of Ortho‐ and Parahydrogen wikipedia.org
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Wilkinson's catalyst
the field such as the implementation of some of the first heteronuclear magnetic resonance studies for its structural elucidation in solution (31P), parahydrogen-induced wikipedia.org
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