Quantification of 1H NMR spectra of human cerebrospinal fluid: a protocol based on constrained total-line-shape analysis

Metabolomics ◽  
2008 ◽  
Vol 4 (2) ◽  
pp. 150-160 ◽  
Author(s):  
Niko M. Jukarainen ◽  
Samuli-Petrus Korhonen ◽  
Mikko P. Laakso ◽  
Minna A. Korolainen ◽  
Matthias Niemitz ◽  
...  
Keyword(s):  
Cerebrospinal Fluid ◽  
1H Nmr ◽  
Shape Analysis ◽  
Line Shape ◽  
Nmr Spectra ◽  
1H Nmr Spectra ◽  
Line Shape Analysis ◽  
Human Cerebrospinal Fluid

NMR Investigations of the Pitch Dependence of Self-diffusion in Cholesteric Liquid Crystals

1988 ◽  
Vol 43 (7) ◽  
pp. 687-692 ◽  
Author(s):  
S. Oehler ◽  
R. Stannarius ◽  
H. Schmiedel
Keyword(s):  
Activation Energy ◽  
Liquid Crystals ◽  
Shape Analysis ◽  
Line Shape ◽  
Nmr Spectra ◽  
Self Diffusion ◽  
Line Shape Analysis ◽  
Twisted Nematic ◽  
Nematic Phases ◽  
C Nmr

Abstract Self-diffusion in the isotropic and twisted nematic phases of mesogenic substances has been studied by means of 1H- and 13C-NMR.From the line shape analysis of the recorded 13C-NMR spectra we obtained the diffussion coefficient D⊥ along the helical pitch.Various concentrations of a chiral additive changed the pitch P0 of a nematic mixture of phenyl-benzoates from 4.7 μm to 7.8 μm. The measured values of D⊥ were in the range from 2.4 · 10-12 m2 s-1 to 1.9 · 10-11 m2 s-1 We found an Arrhenius behaviour with an activation energy of about 55 kJ/mole nearly independent of the pitch. The obtained data for D⊥ seem to have a lower than quadratic dependence on P0.

Line shape analysis of 129Xe NMR spectra of xenon in zeolites

1995 ◽  
Vol 243 (1-2) ◽  
pp. 140-143 ◽  
Author(s):  
F. Rittner ◽  
A. Seidel ◽  
B. Boddenberg
Keyword(s):  
Shape Analysis ◽  
Line Shape ◽  
Nmr Spectra ◽  
129Xe Nmr ◽  
Line Shape Analysis
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