scholarly journals Solvent inhibition in the liquid-phase catalytic oxidation of 1,4-butanediol: understanding the catalyst behaviour from NMR relaxation time measurements

2016 ◽  
Vol 6 (21) ◽  
pp. 7896-7901 ◽  
Author(s):  
Carmine D'Agostino ◽  
Mark R. Feaviour ◽  
Gemma L. Brett ◽  
Jonathan Mitchell ◽  
Andrew P. E. York ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Liquid Phase ◽  
Catalytic Oxidation ◽  
Heterogeneous Catalysts ◽  
Nmr Relaxation ◽  
Nmr Relaxation Time

Solvent inhibition over surfaces affects behaviour and performances of heterogeneous catalysts.

Molecular Dynamics of Cellulose-Water Systems Investigated by NMR Relaxation Method

Holzforschung ◽  
2000 ◽  
Vol 54 (5) ◽  
pp. 501-504 ◽  
Author(s):  
K. Banas ◽  
B. Blicharska ◽  
W. Dietrich ◽  
M. Kluza
Keyword(s):  
Molecular Dynamics ◽  
Relaxation Time ◽  
Nmr Relaxation ◽  
Relaxation Method ◽  
Water Systems ◽  
Motion Model ◽  
Cellulose Pulp ◽  
Time Dependencies ◽  
Nmr Relaxation Time ◽  
Different Origin

Summary On the basis of the proton NMR relaxation time dependencies on temperature and frequency in cellulose pulp a simple two-motion model of molecular dynamics has been proposed. The parameters, activation energies and correlation times, describing the model may be correlated with structure features such as level of crystallinity of cellulose with different origin, as well as degree of paper devastation.

Evaluation of the time-dependent stability of starch–hydrocolloid binary gels involving NMR relaxation time measurements

2012 ◽  
Vol 109 (4) ◽  
pp. 685-690 ◽  
Author(s):  
Hanna Maria Baranowska ◽  
Marek Sikora ◽  
Magdalena Krystyjan ◽  
Piotr Tomasik
Keyword(s):  
Relaxation Time ◽  
Nmr Relaxation ◽  
Time Dependent ◽  
Nmr Relaxation Time

scholarly journals The Effect of Clay Content on the Spin–Spin NMR Relaxation Time Measured in Porous Media

ACS Omega ◽  
2020 ◽  
Vol 5 (12) ◽  
pp. 6545-6555
Author(s):  
Mahmoud Elsayed ◽  
Guenther Glatz ◽  
Ammar El-Husseiny ◽  
Abdullah Alqubalee ◽  
Abdulrauf Adebayo ◽  
...  
Keyword(s):  
Porous Media ◽  
Relaxation Time ◽  
Nmr Relaxation ◽  
Clay Content ◽  
Nmr Relaxation Time

NMR Relaxation Time Simulation for Different Models of Motion in (CH3)3NBH3

2003 ◽  
Vol 58 (9-10) ◽  
pp. 537-540 ◽  
Author(s):  
Roman Goc
Keyword(s):  
Monte Carlo ◽  
Relaxation Time ◽  
Monte Carlo Simulations ◽  
Relaxation Times ◽  
Nmr Relaxation ◽  
Complex Rotation ◽  
Time Simulation ◽  
Curve Versus ◽  
Nmr Relaxation Time ◽  
Clear Relation

Monte Carlo simulations of complex rotation of single −CH3 groups, −(CH3)3 groups and −BH3 groups were performed for trimethylamine borane (CH3)3NBH3. In the course of these simulations the correlation functions for different models of rotation were determined. Knowledge of these functions and of some data extracted from NMR experiments allowed for the calculation of the longitudinal magnetic relaxation time T1 as a function of temperature. The values of relaxation times obtained from Monte Carlo simulations are compared to experimental results published by other authors. There is a clear relation between the assumed model of rotation and the shape of the T1 curve versus temperature.

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