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3 results for “nitrogen-15”
Nitrogen-15 dynamic nuclear polarization of nicotinamide derivatives in biocompatible solutions
<p>This data corresponds to the following paper:</p> <p>Title: Nitrogen-15 dynamic nuclear polarization of nicotinamide derivatives in biocompatible solutions<br> DOI: 10.1126/sciadv.add3643<br> Journal: Science Advances<br> Authors: Josh P. Peters, Arne Brahms, Vivian Janicaud, Maria Anikeeva, Eva Peschke, Frowin Ellermann, Arianna Ferrari, Dana Hellmold, Janka Held-Feindt, Na-mi Kim, Johannes Meiser, Konrad Aden, Rainer Herges, Jan-Bernd Hövener, Andrey N. Pravdivtsev</p> <p>In the upload the figures 2 - 6 are covered, so all figures from the main manuscript with acquired data.</p> <p> </p> <p>Original abstract for the manuscript:</p> <p>Dissolution dynamic nuclear polarization (dDNP) increases the sensitivity of magnetic resonance imaging by more than 10,000 times enabling <em>in vivo</em> metabolic imaging can be performed non-invasively in real-time. Here, we are developing a group of dDNP polarized tracers based on nicotinamide (NAM). We synthesized 1-<sup>15</sup>N-NAM and 1-<sup>15</sup>N nicotinic acid and hyperpolarized them with dDNP, reaching (13.0±1.9)% <sup>15</sup>N polarization. We found that the lifetime of hyperpolarized 1-<sup>15</sup>N-NAM is strongly field- and pH-dependent, with T<sub>1</sub> being as long as 41 s at a pH of 12 and 1 T while as short as a few seconds at neutral pH and fields below 1 T. The remarkably short 1-<sup>15</sup>N lifetime at low magnetic fields and neutral pH drove us to establish a unique pH neutralization procedure. Using <sup>15</sup>N dDNP and an inexpensive rodent imaging probe designed in-house, we acquired a <sup>15</sup>N MRI of 1-<sup>15</sup>N-NAM (previously hyperpolarized for more than an hour) in less than one second.</p>
Nutrients from spawning salmon influence leaf area, tissue density, and nitrogen-15 in riparian plant leaves
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Monitoring Structure and Coordination Chemistry of Co4O4-based Oxygen Evolution Catalysts by Nitrogen-14/-15 and Cobalt-59 NMR Spectroscopy
<p>This the raw data set for the publication "Monitoring Structure and Coordination Chemistry of Co4O4-based Oxygen Evolution Catalysts by Nitrogen-14/-15 and Cobalt-59 NMR Spectroscopy"</p>
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