Nuclear Magnetic Relaxation

Nuclear Magnetic Relaxation

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...

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...

NUCLEAR MAGNETIC RESONANCE AND RELAXATION IN U1-xPuxAl2

27Al nuclear magnetic resonance and relaxation in U I ~ P U ~ A ~ Z is discussed in terms of the formation of virtual bound 5 f states on the Pu ions. Magnetic order is found for X = 0.3 at about 5 O K . The 5 f electron elements U, Np, Pu, etc., form an interesting class of alloys and intermetallic compounds. Whereas the pure metals do not appear to have localized magnetic moments nor magnetic...

Nuclear magnetic relaxation of liquids in porous media

Nuclear magnetic relaxation is useful for probing physical and chemical properties of liquids in porous media. Examples are given on high surface area porous materials including calibrated porous silica glasses, granular packings, plaster pastes, cement-based materials and natural porous materials, such as sandstone and carbonate rocks. Here, we outline our recent NMR relaxation work for these ...