Geodesic
Potential of NMR method for the study of asphaltenes structural and dynamic organization in the condensed state
Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Kazanskii Gosudarstvennyi Universitet. Uchenye Zapiski. Seriya Fiziko-Matematichaskie Nauki, Tome 151 (2009) no. 3, pp. 41-51

Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

The asphaltenes extracted from three different oils were studied by nuclear magnetic resonance (NMR) method. It was found that the transverse relaxation parameters for asphaltenes depend on the structural-group composition of the original oil. The part $P_s$ of the solid component characterized by a short transverse relaxation time $T_{2s}$ ($\sim10^{-5}$ s) is the main characteristic of the nuclear magnetic relaxation for asphaltenes in the condensed state. For studying structural and dynamic properties of asphaltenes the Solid-Echo pulse sequence ($90^\circ_{0^\circ}$ – $\tau$ – $90^\circ_{90^\circ}$ – $\tau$ – solid-echo signal) was mainly used. Basing on the comparative analysis of pulsed and continuous-wave NMR data it is concluded that the most correct information on the part $P_s$ could be obtained by the extrapolation to the time $\tau=0$ of exponential decomposition parameters for solid-echo signal at different values of time $\tau$.
Keywords: nuclear magnetic resonance, solid-echo pulse sequence, free induction decay, asphaltenes.
Mots-clés : solid-echo signal 
@article{UZKU_2009_151_3_a2,
     author = {N. V. Shkalikov and V. D. Skirda},
     title = {Potential of {NMR} method for the study of asphaltenes structural and dynamic organization in the condensed state},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {41--51},
     publisher = {mathdoc},
     volume = {151},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2009_151_3_a2/}
}
TY  - JOUR
AU  - N. V. Shkalikov
AU  - V. D. Skirda
TI  - Potential of NMR method for the study of asphaltenes structural and dynamic organization in the condensed state
JO  - Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki
PY  - 2009
SP  - 41
EP  - 51
VL  - 151
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/UZKU_2009_151_3_a2/
LA  - ru
ID  - UZKU_2009_151_3_a2
ER  - 
%0 Journal Article
%A N. V. Shkalikov
%A V. D. Skirda
%T Potential of NMR method for the study of asphaltenes structural and dynamic organization in the condensed state
%J Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki
%D 2009
%P 41-51
%V 151
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/UZKU_2009_151_3_a2/
%G ru
%F UZKU_2009_151_3_a2
N. V. Shkalikov; V. D. Skirda. Potential of NMR method for the study of asphaltenes structural and dynamic organization in the condensed state. Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Kazanskii Gosudarstvennyi Universitet. Uchenye Zapiski. Seriya Fiziko-Matematichaskie Nauki, Tome 151 (2009) no. 3, pp. 41-51. http://geodesic.mathdoc.fr/item/UZKU_2009_151_3_a2/