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Default Large dose hyperpolarized water with dissolution-DNP at high magnetic field

From The DNP-NMR Blog:

Large dose hyperpolarized water with dissolution-DNP at high magnetic field

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Lipsø, K.W., et al., Large dose hyperpolarized water with dissolution-DNP at high magnetic field. J. Magn. Reson., 2017. 274: p. 65-72.


http://dx.doi.org/10.1016/j.jmr.2016.11.008


We demonstrate a method for the preparation of hyperpolarized water by dissolution Dynamic Nuclear Polarization at high magnetic field. Protons were polarized at 6.7 T and 1.1 K to >70% with frequency modulated microwave irradiation at 188G Hz. 97.2 ± 0.7% of the radical was extracted from the sample in the dissolution in a two-phase system. 16 ± 1 mL of 5.0 M 1H in D2O with a polarization of 13.0 ± 0.9% in the liquid state was obtained, corresponding to an enhancement factor of 4000 ± 300 compared to the thermal equilibrium at 9.4 T and 293 K. A longitudinal relaxation time constant of 16 ± 1 s was measured. The sample was polarized and dissolved in a fluid path compatible with clinical polarizers. The volume of hyperpolarized water produced by this method enables angiography and perfusion measurements in large animals, as well as NMR experiments for studies of e.g. proton exchange and polarization transfer to other nuclei.
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