Matches in SemOpenAlex for { <https://semopenalex.org/work/W3214438098> ?p ?o ?g. }
Showing items 1 to 87 of
87
with 100 items per page.
- W3214438098 abstract "Dynamic Nuclear Polarization (DNP) can help to overcome the intrinsically low sensitivity of magnetic resonance experiments. To reach high nuclear polarization in dissolution DNP (d-DNP), a mixture of water and glycerol containing a high concentration of paramagnetic polarizing agents is required. TEMPOL is one of the most commonly used polarizing agent in DNP. At cryogenic temperatures, the EPR spectrum of TEMPOL is very broad. This considerably complicates the description of the mechanisms that are responsible for the transfer of polarization from electrons to protons. The slow electronic spectral diffusion is not sufficient to average the electron spin-lattice relaxation time over the entire spectrum. In this thesis, the anisotropy of T1e has been included in Abragam’s and Borghini’s thermal mixing (TM) model. Comparisons of experimental 1H polarizations with predictions of the TM model demonstrate that an accurate DNP model requires the consideration of the anisotropy of T1e. On the other hand, it is known that water/glycerol mixtures can undergo a time-dependent phase separation in liquid phase. Such a process can generate variations of ca. 20% of the proton polarization in our DNP samples at 4 K in a static magnetic field of 6.7 T. Combining EPR and cryo-TEM experiments helped us to understand the impact of the ripening of “DNP-juice” on the proton polarization that can be achieved by DNP. In addition to these phenomena, the strong coupling between a high-Q probe and the large magnetization of the 1H spins contained in the “DNP-juice” leads to nonlinear behavior of the nuclear magnetization at short times in the form of NMR MASER bursts, and gives rise to NMR signals that can last more than several tens of seconds. Finally, d-DNP is used to hyperpolarize 31P in inorganic phosphates to get a better understanding of the calcium phosphate clustering that occurs at the early stages of calcification." @default.
- W3214438098 created "2021-11-22" @default.
- W3214438098 creator A5005878321 @default.
- W3214438098 date "2018-10-18" @default.
- W3214438098 modified "2023-09-23" @default.
- W3214438098 title "Spatial and temporal evolution of dynamic nuclear polarization on different scales" @default.
- W3214438098 hasPublicationYear "2018" @default.
- W3214438098 type Work @default.
- W3214438098 sameAs 3214438098 @default.
- W3214438098 citedByCount "0" @default.
- W3214438098 crossrefType "dissertation" @default.
- W3214438098 hasAuthorship W3214438098A5005878321 @default.
- W3214438098 hasConcept C111357860 @default.
- W3214438098 hasConcept C113196181 @default.
- W3214438098 hasConcept C115260700 @default.
- W3214438098 hasConcept C120665830 @default.
- W3214438098 hasConcept C121332964 @default.
- W3214438098 hasConcept C124712363 @default.
- W3214438098 hasConcept C147120987 @default.
- W3214438098 hasConcept C147789679 @default.
- W3214438098 hasConcept C159467904 @default.
- W3214438098 hasConcept C185544564 @default.
- W3214438098 hasConcept C185592680 @default.
- W3214438098 hasConcept C187961010 @default.
- W3214438098 hasConcept C192562407 @default.
- W3214438098 hasConcept C205049153 @default.
- W3214438098 hasConcept C26873012 @default.
- W3214438098 hasConcept C2778870898 @default.
- W3214438098 hasConcept C32546565 @default.
- W3214438098 hasConcept C41999313 @default.
- W3214438098 hasConcept C43617362 @default.
- W3214438098 hasConcept C46141821 @default.
- W3214438098 hasConcept C54516573 @default.
- W3214438098 hasConcept C62520636 @default.
- W3214438098 hasConcept C85725439 @default.
- W3214438098 hasConcept C91881484 @default.
- W3214438098 hasConceptScore W3214438098C111357860 @default.
- W3214438098 hasConceptScore W3214438098C113196181 @default.
- W3214438098 hasConceptScore W3214438098C115260700 @default.
- W3214438098 hasConceptScore W3214438098C120665830 @default.
- W3214438098 hasConceptScore W3214438098C121332964 @default.
- W3214438098 hasConceptScore W3214438098C124712363 @default.
- W3214438098 hasConceptScore W3214438098C147120987 @default.
- W3214438098 hasConceptScore W3214438098C147789679 @default.
- W3214438098 hasConceptScore W3214438098C159467904 @default.
- W3214438098 hasConceptScore W3214438098C185544564 @default.
- W3214438098 hasConceptScore W3214438098C185592680 @default.
- W3214438098 hasConceptScore W3214438098C187961010 @default.
- W3214438098 hasConceptScore W3214438098C192562407 @default.
- W3214438098 hasConceptScore W3214438098C205049153 @default.
- W3214438098 hasConceptScore W3214438098C26873012 @default.
- W3214438098 hasConceptScore W3214438098C2778870898 @default.
- W3214438098 hasConceptScore W3214438098C32546565 @default.
- W3214438098 hasConceptScore W3214438098C41999313 @default.
- W3214438098 hasConceptScore W3214438098C43617362 @default.
- W3214438098 hasConceptScore W3214438098C46141821 @default.
- W3214438098 hasConceptScore W3214438098C54516573 @default.
- W3214438098 hasConceptScore W3214438098C62520636 @default.
- W3214438098 hasConceptScore W3214438098C85725439 @default.
- W3214438098 hasConceptScore W3214438098C91881484 @default.
- W3214438098 hasLocation W32144380981 @default.
- W3214438098 hasOpenAccess W3214438098 @default.
- W3214438098 hasPrimaryLocation W32144380981 @default.
- W3214438098 hasRelatedWork W1963690565 @default.
- W3214438098 hasRelatedWork W1967258781 @default.
- W3214438098 hasRelatedWork W2003455330 @default.
- W3214438098 hasRelatedWork W2013270952 @default.
- W3214438098 hasRelatedWork W2026146247 @default.
- W3214438098 hasRelatedWork W2056490682 @default.
- W3214438098 hasRelatedWork W2070719595 @default.
- W3214438098 hasRelatedWork W2092927127 @default.
- W3214438098 hasRelatedWork W2094333290 @default.
- W3214438098 hasRelatedWork W2117297592 @default.
- W3214438098 hasRelatedWork W2151972320 @default.
- W3214438098 hasRelatedWork W2297353617 @default.
- W3214438098 hasRelatedWork W2335345698 @default.
- W3214438098 hasRelatedWork W2413089188 @default.
- W3214438098 hasRelatedWork W2526756834 @default.
- W3214438098 hasRelatedWork W2606433208 @default.
- W3214438098 hasRelatedWork W2607013165 @default.
- W3214438098 hasRelatedWork W2805085971 @default.
- W3214438098 hasRelatedWork W2884589171 @default.
- W3214438098 hasRelatedWork W2895496980 @default.
- W3214438098 isParatext "false" @default.
- W3214438098 isRetracted "false" @default.
- W3214438098 magId "3214438098" @default.
- W3214438098 workType "dissertation" @default.