Results 91 to 100 of about 2,750 (239)

Unveiling coherently driven hyperpolarization dynamics in signal amplification by reversible exchange

Nature Communications, 2019
There is increasing effort to improve the signal sensitivity and explore the hyperpolarization dynamics. Here the authors demonstrate the parahydrogen spin transfer dynamics in compounds containing 15N using SABRE hyperpolarization technique with ...
Jacob R. Lindale, Shannon L. Eriksson, Christian P. N. Tanner, Zijian Zhou, Johannes F. P. Colell, Guannan Zhang, Junu Bae, Eduard Y. Chekmenev, Thomas Theis, Warren S. Warren   +9 more
doaj   +1 more source

Efficient 15N hyperpolarization of [15N3]metronidazole antibiotic via spin-relayed pulsed SABRE-SHEATH

Journal of Magnetic Resonance Open
Signal Amplification by Reversible Exchange in SHield Enables Alignment Transfer to Heteronuclei (SABRE-SHEATH) is an NMR hyperpolarization technique that relies of the simultaneous exchange of parahydrogen and a to-be-hyperpolarized molecule on the ...
Shiraz Nantogma, Shannon L. Eriksson, Thomas Theis, Warren S. Warren, Boyd M. Goodson, Eduard Y. Chekmenev   +5 more
doaj   +1 more source

Perpetual hyperpolarization of allyl acetate from parahydrogen and continuous flow heterogeneous hydrogenation with recycling of unreacted propargyl acetate

Journal of Magnetic Resonance Open, 2022
A novel closed loop, continuous flow (CF) reactor system for parahydrogen enhanced nuclear magnetic resonance (NMR) of liquids via heterogeneous catalysis is introduced which enables recycling of unreacted liquid substrate reactant.
Tommy Yunpu Zhao, Michelle P. Lapak, Ranjan Behera, Hanqin Zhao, Maria-Jose Ferrer, Helena E. Hagelin Weaver, Wenyu Huang, Clifford R. Bowers   +7 more
doaj   +1 more source

Frequency‐Selective Manipulations of Spins allow Effective and Robust Transfer of Spin Order from Parahydrogen to Heteronuclei in Weakly‐Coupled Spin Systems

ChemPhysChem, 2021
We present a selectively pulsed (SP) generation of sequences to transfer the spin order of parahydrogen (pH2) to heteronuclei in weakly coupled spin systems.
Andrey N. Pravdivtsev, J. Hövener, A. Schmidt   +2 more
semanticscholar   +1 more source

Exploring chemical and photochemical reactivity in metal-free parahydrogen-induced polarization [PDF]

This thesis explores mechanistic details of metal-free parahydrogen-induced polarization (PHIP), mediated by parahydrogen activations with ansa-aminoboranes and phosphorus biradicaloids, for sensitivity enhancement in nuclear magnetic resonance (NMR ...
Konsewicz, Karolina
core   +1 more source

ParaHydrogen Polarized Ethyl‐[1‐13C]pyruvate in Water, a Key Substrate for Fostering the PHIP‐SAH Approach to Metabolic Imaging

ChemPhysChem, 2021
An efficient synthesis of vinyl‐[1‐13C]pyruvate has been reported, from which 13C hyperpolarized (HP) ethyl‐[1‐13C]pyruvate has been obtained by means of ParaHydrogen Induced Polarization (PHIP).
Carla Carrera, E. Cavallari, G. Digilio, Oksana A Bondar, S. Aime, F. Reineri   +5 more
semanticscholar   +1 more source

Parahydrogen-induced polarization allows 2000-fold signal enhancement in biologically active derivatives of the peptide-based drug octreotide

Scientific Reports, 2023
Octreotide, a somatostatin analogue, has shown its efficacy for the diagnostics and treatment of various types of cancer, i.e., in octreotide scan, as radio-marker after labelling with a radiopharmaceutical.
Jonas Lins, Yuliya A. Miloslavina, Stefania C. Carrara, Lorenz Rösler, Sarah Hofmann, Kevin Herr, Franziska Theiß, Laura Wienands, Olga Avrutina, Harald Kolmar, Gerd Buntkowsky   +10 more
doaj   +1 more source

Polarizing insensitive nuclei at ultralow magnetic fields using parahydrogen: a facile route to optimize adiabatic magnetic field sweeps

, 2022
Parahydrogen induced polarization (PHIP) provides a powerful tool to enhance inherently weak NMR signals, particularly in biologically relevant compounds.
Vitaly, Kozinenko, Alexandra , Yurkovskaya, Alexey, Kiryutin   +2 more
core   +1 more source

Quantitative In-situ Monitoring of Parahydrogen Fraction Using Raman Spectroscopy [PDF]

, 2018
Raman spectroscopy has been used to provide a rapid, noninvasive, and nondestructive quantification method for determining the parahydrogen fraction of hydrogen gas.
Andrews, John, Duckett, Simon B., Halse, Meghan E., Richardson, Peter M., Richardson, Peter Michael, Semenova, Olga, Halse, Meghan Eileen, Parrott, Andrew J., Dallin, Paul, Nordon, Alison, Duckett, Simon   +10 more
core   +1 more source

New para‐hydrogen cold neutron source at the Budapest Research Reactor: Monte Carlo simulations

Journal of Applied Crystallography, Volume 59, Issue 2, Page 392-403, April 2026.
This paper explores the options for upgrading the cold neutron source at the Budapest Research Reactor.The planned upgrade of the neutron guide system at the Budapest Research Reactor (BRR) provides an opportunity to enhance the performance of its cold neutron source.
Dmitrii Shapiro, Petr Konik, Mina Akhyani, Alexander Ioffe   +3 more
wiley   +1 more source