scholarly journals Molecular motions and phase transitions. NMR relaxation times studies of several lecithins

1981 ◽  
Vol 33 (3) ◽  
pp. 419-434 ◽  
Author(s):  
R. Bar-Adon ◽  
H. Gilboa
Keyword(s):  
Phase Transitions ◽  
Relaxation Times ◽  
Nmr Relaxation ◽  
Molecular Motions ◽  
Nmr Relaxation Times

Molecular Motions in Catenands and Catenates Studied by 13C NMR Relaxation Times

1994 ◽  
pp. 391-398
Author(s):  
J.-P. Kintzinger ◽  
H. Bourgeois ◽  
A. Edel ◽  
R. Graff ◽  
J.-C. Chambron ◽  
...  
Keyword(s):  
13C Nmr ◽  
Relaxation Times ◽  
Nmr Relaxation ◽  
Molecular Motions ◽  
Nmr Relaxation Times

scholarly journals Proton NMR relaxation times in ischemic brain edema.

Stroke ◽  
1986 ◽  
Vol 17 (6) ◽  
pp. 1149-1152 ◽  
Author(s):  
Y Horikawa ◽  
S Naruse ◽  
C Tanaka ◽  
K Hirakawa ◽  
H Nishikawa
Keyword(s):  
Brain Edema ◽  
Relaxation Times ◽  
Proton Nmr ◽  
Nmr Relaxation ◽  
Ischemic Brain ◽  
Ischemic Brain Edema ◽  
Nmr Relaxation Times

Effects of hydrophobic treatments of stone on pore water studied by continuous distribution analysis of NMR relaxation times

2001 ◽  
Vol 19 (3-4) ◽  
pp. 509-512 ◽  
Author(s):  
L. Appolonia ◽  
G.C. Borgia ◽  
V. Bortolotti ◽  
R.J.S. Brown ◽  
P. Fantazzini ◽  
...  
Keyword(s):  
Pore Water ◽  
Relaxation Times ◽  
Continuous Distribution ◽  
Nmr Relaxation ◽  
Distribution Analysis ◽  
Nmr Relaxation Times

Reduction in the proton NMR relaxation times of dystrophic muscles following functional improvement

1984 ◽  
Vol 2 (3) ◽  
pp. 250-251 ◽  
Author(s):  
L.K. Misra ◽  
P.A. Narayana ◽  
D. Bearden ◽  
T. Egan ◽  
R.P. Munjaal ◽  
...  
Keyword(s):  
Relaxation Times ◽  
Proton Nmr ◽  
Nmr Relaxation ◽  
Functional Improvement ◽  
Nmr Relaxation Times

Molecular Motions and Phase Transitions in Solid CH3NH3PbX3 (X = C1, Br, I) as Studied by NMR and NQR

1991 ◽  
Vol 46 (3) ◽  
pp. 240-246 ◽  
Author(s):  
Qiang Xu ◽  
Taro Eguchi ◽  
Hirokazu Nakayama ◽  
Nobuo Nakamura ◽  
Michihiko Kishita
Keyword(s):  
Phase Transitions ◽  
Temperature Dependence ◽  
Relaxation Times ◽  
Lattice Relaxation ◽  
Molecular Motions ◽  
Isotropic Reorientation ◽  
Higher Temperature ◽  
Successive Phase

AbstractThe temperature dependence of 35C1, 81Br, and 127I NQR frequencies and 1Hspin-lattice relaxation times (T1) for CH3NH3PbX3 (X = Cl, Br, I) was measured through the successive phase transitions in these solids. The isotropic reorientation of the CH3NH3 ions takes place in the higher-temperature phases (tetragonal [I4/mcm] and cubic) of the three salts (Ea= 11 kJ mol -1). T1's in the lowest-temperature phases (orthorhombic) indicate that the cations undergo correlated C3-reorientation in the chloride (Ea = 5.45 kJ mol -1)and in the iodide (Ea = 5.80 kJ mol -1, whereas correlated (Ea = 2.40 kJ mol-1) and uncorrected (Ea = 7.50 kJ mol-1) C3- reorientations are excited in the bromide. It is also revealed that the rotational tunneling of the cations governs T1 at lowtemperature region in the orthorhombic phases of these salts

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