Results 1 to 10 of about 667 (94)

A Controlled System for Parahydrogen Hyperpolarization Experiments [PDF]

Molecules
Parahydrogen-induced hyperpolarization (PHIP), introduced nearly four decades ago, provides an elegant solution to one of the fundamental limitations of nuclear magnetic resonance (NMR)—its notoriously low sensitivity.
Lorenzo Franco, Federico Floreani, Salvatore Mamone, Ahmed Mohammed Faramawy, Marco Ruzzi, Cristina Tubaro, Gabriele Stevanato   +6 more
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SABRE Ir-IMes Catalysis for the Masses [PDF]

Molecules
The Signal Amplification By Reversible Exchange (SABRE) technique provides enhancement of Nuclear Magnetic Resonance (NMR) signals up to several orders of magnitude using chemical exchange of a substrate and parahydrogen on an iridium complex. Therefore,
Izabelle Smith, Noah Terkildsen, Zachary Bender, Abubakar Abdurraheem, Shiraz Nantogma, Anna Samoilenko, Joseph Gyesi, Larisa M. Kovtunova, Oleg G. Salnikov, Igor V. Koptyug, Raphael Kircher, Danila A. Barskiy, Eduard Y. Chekmenev, Roman V. Shchepin   +13 more
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Biological J‐Coupling Spectroscopy at Low Magnetic Field [PDF]

Small Science
Nuclear magnetic resonance (NMR) spectroscopy is a powerful tool for investigating biological systems. In particular, low‐field NMR offers advantages for studying cellular metabolism in their native environment.
Gonzalo G. Rodriguez, Charlotte von Petersdorff‐Campen, Sergey Korchak, Oscar Sucre, Maria D. Santi, Josef Elsasser, Ruhuai Mei, Lisa M. Fries, Jan Felger, Andrea Markus, Frauke Alves, Stefan Glöggler   +11 more
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Through-bond and through-space radiofrequency amplification by stimulated emission of radiation [PDF]

Communications Chemistry
Radio Amplification by Stimulated Emission of Radiation (RASER) is a phenomenon observed during nuclear magnetic resonance (NMR) experiments with strongly negatively polarized systems. This phenomenon may be utilized for the production of very narrow NMR
Ivan A. Trofimov, Oleg G. Salnikov, Andrey N. Pravdivtsev, Henri de Maissin, Anna P. Yi, Eduard Y. Chekmenev, Jan-Bernd Hövener, Andreas B. Schmidt, Igor V. Koptyug   +8 more
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Spontaneous increasing of sensitivity and resolution in parahydrogen-induced hyperpolarization by RASER [PDF]

Magnetic Resonance Letters
Enhancing the sensitivity of nuclear magnetic resonance (NMR) technology has been the focus of NMR research for decades, which offers the potential to significantly expand its applications in chemistry, biology, and medical imaging.
Zeyu Zheng, Qiwei Peng, Huijun Sun, Xinchang Wang, Zhong Chen   +4 more
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Analysis of chemical exchange in iridium N-heterocyclic carbene complexes using heteronuclear parahydrogen-enhanced NMR [PDF]

Communications Chemistry
The signal amplification by reversible exchange process (SABRE) enhances NMR signals by unlocking hidden polarization in parahydrogen through interactions with to-be-hyperpolarized substrate molecules when both are transiently bound to an Ir-based ...
Charbel D. Assaf, Xin Gui, Oleg G. Salnikov, Arne Brahms, Nikita V. Chukanov, Ivan V. Skovpin, Eduard Y. Chekmenev, Rainer Herges, Simon B. Duckett, Igor V. Koptyug, Kai Buckenmaier, Rainer Körber, Markus Plaumann, Alexander A. Auer, Jan-Bernd Hövener, Andrey N. Pravdivtsev   +15 more
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Efficient polarization redistribution in hyperpolarized 1-D-propane produced via pairwise parahydrogen addition

Journal of Magnetic Resonance Open, 2023
Parahydrogen-Induced Polarization (PHIP) is NMR hyperpolarization technique that has matured from fundamental science to a biomedical tool for production of hyperpolarized MRI contrast agents. The spin order of nascent parahydrogen-derived protons can be
Nuwandi M. Ariyasingha, Shiraz Nantogma, Anna Samoilenko, Oleg G. Salnikov, Nikita V. Chukanov, Larisa M. Kovtunova, Igor V. Koptyug, Eduard Y. Chekmenev   +7 more
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Computer simulations of supercooled liquid hydrogen mixtures and the possible crystallization slowdown

Results in Physics, 2021
Metastable liquid mixtures of parahydrogen and orthodeuterium are studied theoretically by means of computer simulations. No reduced propensity of the mixture to undergo crystallization is observed, compared to that of pure liquid parahydrogen.
Massimo Boninsegni
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Reconversion of Parahydrogen Gas in Surfactant-Coated Glass NMR Tubes

Molecules, 2023
The application of parahydrogen gas to enhance the magnetic resonance signals of a diversity of chemical species has increased substantially in the last decade.
Robert V. Chimenti, James Daley, James Sack, Jennifer Necsutu, Nicholas Whiting   +4 more
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Geminal parahydrogen-induced polarization: accumulating long-lived singlet order on methylene proton pairs [PDF]

Magnetic Resonance, 2020
In the majority of hydrogenative parahydrogen-induced polarization (PHIP) experiments, the hydrogen molecule undergoes pairwise cis addition to an unsaturated precursor to occupy vicinal positions on the product molecule.
L. Dagys, B. Ripka, M. Leutzsch, G. A. I. Moustafa, J. Eills, J. F. P. Colell, M. H. Levitt   +6 more
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