Physics – Quantum Physics
Scientific paper
2011-08-25
Chem. Phys. Lett. 517, 126-131 (2011)
Physics
Quantum Physics
7 pages, 4 figures, presented at the International Society for Magnetic Resonance (ISMAR) in Florence, 2010
Scientific paper
Heat-bath cooling is a component of practicable algorithmic cooling of spins, an approach which might be useful for in vivo 13C spectroscopy, in particular for prolonged metabolic processes where substrates that are hyperpolarized ex-vivo are not effective. We applied heat-bath cooling to 1,2-13C2-amino acids, using the alpha protons to shift entropy from selected carbons to the environment. For glutamate and glycine, both carbons were cooled by about 2.5-fold, and in other experiments the polarization of C1 nearly doubled while all other spins had equilibrium polarization, indicating reduction in total entropy. The effect of adding Magnevist, a gadolinium contrast agent, on heat-bath cooling of glutamate was investigated.
Elias Yuval
Gilboa Haggai
Mor Tal
Weinstein Yossi
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