Nuclear Magnetic Relaxation in Antiferromagnetics, II

Nuclear Magnetic Relaxation

Nuclear Magnetic Relaxation Dispersion in Protein Solutions

Bovine and human B erythrocyte carbonic anhydrases substituted with Co2+ cause an enhancement of the nuclear magnetic relaxation rate of solvent water protons (T1-l) at high pH that is decreased by the addition of carbonic anhydrase inhibitors such as azide and Ethoxzolamide. The part of T1-1 which can be inhibited by Ethoxzolamide is due to exchangeable protons located at the active site of th...

Magnetic relaxation in hard type-II superconductors

– Magnetic relaxation in a type-II superconductor is simulated for a range of temperatures T in a simple model of 2D Josephson junction array (JJA) with finite screening. The high-T phase, that is characterised by a single time scale τα, crosses over to an intermediate phase at a lower temperature Tcr wherein a second time scale τβ ≪τα emerges. The relaxation in the time window set by τβ follow...

Antimony NQR and Nuclear Magnetic Relaxation

Antimony nuclear quadrupole resonance frequencies in (NH 4 ) 6 Sb 4 (S0 4 ) 3 F 1 2 crystals were measured as a function of temperature, and no evidence of phase transition was detected between 77 K and room temperature. However, the resonance frequencies do not follow the Bayer type exactly. Such an anomaly is attributed to the effect of rotation of ammonium ions which form hydrogen bonds of t...

Molecular Motion in Liquids and Solutions. II. Dynamic Nuclear Polarization and Nuclear Magnetic Relaxation in Free Radical Solutions of Toluene

Two methods are utilized to study the relaxation behaviour and molecular motion in solutions of free radicals in toluene: the investigation of longitudinal and transversal solvent proton relaxation at a properly chosen frequency (48 MHz), and the determination of enhancement factors of the dynamic proton polarization over a large frequency range. The temperature dependence of the quantities con...