Superconducting fluctuations andCu63NQR-NMR relaxation inYBa2Cu3O7−δ: Effect of magnetic field and a test for the pairing-state symmetry

1996 ◽  
Vol 54 (14) ◽  
pp. R9682-R9685 ◽  
Author(s):  
P. Carretta ◽  
D. V. Livanov ◽  
A. Rigamonti ◽  
A. A. Varlamov
Keyword(s):  
Magnetic Field ◽  
Nmr Relaxation ◽  
Pairing State ◽  
Superconducting Fluctuations

Effect of superconducting fluctuations on63Cu NQR-NMR relaxation in YBa2Cu3O7

1997 ◽  
Vol 19 (8-9) ◽  
pp. 1131-1136 ◽  
Author(s):  
P. Carretta ◽  
A. Rigamonti ◽  
D. V. Livanov ◽  
A. A. Varlamov
Keyword(s):  
Nmr Relaxation ◽  
Superconducting Fluctuations

Na+ alters the affinity for glucose and phosphate in rat renal brush-border membranes: a study of NMR relaxation rates

1992 ◽  
Vol 263 (2) ◽  
pp. C509-C515
Author(s):  
M. Barac-Nieto ◽  
S. M. Liu ◽  
R. K. Gupta
Keyword(s):  
Magnetic Field ◽  
Brush Border ◽  
Brush Border Membrane ◽  
Substrate Binding ◽  
Nmr Relaxation ◽  
Membrane Vesicles ◽  
Relaxation Rates ◽  
Transverse Relaxation ◽  
Rapid Exchange ◽  
Renal Brush Border Membranes

Transport of D-glucose (Glc) and Pi across renal microvilli brush-border membrane vesicles (BBMV) is coupled to Na+.Na+ may alter substrate binding and dissociation or the mobility of the translocator and its complexes. To evaluate substrate binding in NaCl or KCl solutions containing BBMV, we measured nuclear magnetic resonance transverse relaxation rates (1/T2) of [1-13C]Glc and 31P(i), as well as their temperature, magnetic field, and pH dependencies. The data indicate the following: 1) the alpha-anomer, but not the beta-anomer, of Glc binds to BBMV, more in the presence of Na+ than of K+; 2) interactions of P(i) with BBMV that increase its 1/T2 are significant in the presence of K+ but not of Na+; 3) temperature and magnetic field dependencies of the 1/T2 of P(i) bound to BBMV are consistent with more rapid exchange with free P(i) in the presence of Na+ than of K+; and 4) in the presence of Na+, [H+] promoted interactions of P(i) with BBMV that increase its 1/T2, probably by interfering with formation of rapidly dissociating Na(+)-P(i)-carrier complexes. In conclusion, Na+ promotes association of alpha-Glc to BBMV but promotes rapid exchange and dissociation of P(i) from BBMV. In both cases, Na+ effects coupling by altering the affinity of the cotransporters for the substrate.

High-field liquid state NMR hyperpolarization: a combined DNP/NMRD approach

2014 ◽  
Vol 16 (35) ◽  
pp. 18781-18787 ◽  
Author(s):  
Petr Neugebauer ◽  
Jan G. Krummenacker ◽  
Vasyl P. Denysenkov ◽  
Christina Helmling ◽  
Claudio Luchinat ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Dynamic Nuclear Polarization ◽  
Liquid State ◽  
High Field ◽  
Nuclear Polarization ◽  
Nmr Relaxation ◽  
Relaxation Dispersion ◽  
Liquid Solutions ◽  
High Fields

Dynamic nuclear polarization and NMR relaxation dispersion measurements have been performed on liquid solutions of TEMPOL radicals in solvents with different viscosities at a high magnetic field of 9.2 T. The results indicate that fast dynamics significantly contribute to DNP enhancements at high fields.

scholarly journals 31 P NMR relaxation of cortical bone mineral at multiple magnetic field strengths and levels of demineralization

2013 ◽  
Vol 26 (9) ◽  
pp. 1158-1166 ◽  
Author(s):  
Alan C. Seifert ◽  
Alexander C. Wright ◽  
Suzanne L. Wehrli ◽  
Henry H. Ong ◽  
Cheng Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Cortical Bone ◽  
Bone Mineral ◽  
Nmr Relaxation ◽  
Field Strengths

scholarly journals Superconducting Fluctuations and the Pseudogap in the Slightly Overdoped High-TcSuperconductorTlSr2CaCu2O6.8: High Magnetic Field NMR Studies

2000 ◽  
Vol 85 (2) ◽  
pp. 405-408 ◽  
Author(s):  
Guo-qing Zheng ◽  
H. Ozaki ◽  
W. G. Clark ◽  
Y. Kitaoka ◽  
P. Kuhns ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Nmr Studies ◽  
Superconducting Fluctuations

Magnetic field induced superconducting fluctuations in L2−xCexCuO4−y single crystals

1994 ◽  
Vol 194-196 ◽  
pp. 2253-2254 ◽  
Author(s):  
L. Fábrega ◽  
M.A. Crusellas ◽  
J. Fontcuberta ◽  
X. Obradors ◽  
S. Piñol ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Crystals ◽  
Superconducting Fluctuations
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