Dynamics of Alanine Methyl Groups in Alanine Oligopeptides and Spider Dragline Silks with Different Packing Structures As Studied by 13C Solid-State NMR Relaxation

2018 ◽  
Vol 51 (17) ◽  
pp. 6746-6756 ◽  
Author(s):  
Tetsuo Asakura ◽  
Yugo Tasei ◽  
Hironori Matsuda ◽  
Akira Naito
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Relaxation ◽  
Methyl Groups

Investigation of Methyl Reorientations in 1,4-Dimethoxy- 2,6-dimethylbenzene by NMR and Inelastic Neutron Scattering

1979 ◽  
Vol 34 (5) ◽  
pp. 631-645 ◽  
Author(s):  
R. A. Wind ◽  
W. M. M. J. Bovée ◽  
J. C. F. Kupers ◽  
J. Smidt ◽  
Chr. Steenbergen
Keyword(s):  
Solid State ◽  
Neutron Scattering ◽  
Liquid State ◽  
Solid State Nmr ◽  
Inelastic Neutron Scattering ◽  
Nmr Relaxation ◽  
Inelastic Neutron ◽  
Methyl Groups ◽  
Methyl Group ◽  
Nmr Study

Abstract In this paper a solid state NMR relaxation study and inelastic neutron scattering (INS) experiments (the latter in the solid and liquid phase) are reported for a molecule containing methyl groups in different surroundings, namely 1,4-dimethoxy-2,6-dimethylbenzene. The results are compared with each other and with those of a liquid state NMR study reported earlier. It is found that in this way both the shapes and magnitudes of the various hindering potentials can be determined. The result is that the methyl groups 1, 2 and 4 possess a threefold cosine-shaped potential with heights given by 7.7, 9.0 and 15.0 kJ/mol according to the solid state NMR measurements (from the INS study the values 7.5, 7.5 and 16.0 kJ/mol were obtained). For methyl group 6 a mixture of a three-and six-fold symmetry had to be taken into account in order to explain the experiments. Except for methyl group 4 the liquid state NMR results deviate from those obtained with the other two techniques. A possible cause for this discrepancy is discussed. For the molecular structure it is concluded that the reorientations of the methyl groups 1 and 2 are influenced by mutual hindering and that the angle between the plane through the C4-O-C bond and the aromatic plane is small, whereas for the C1-O-C bond this angle is estimated to be about 70°.

scholarly journals Dynamics of Methyl Groups in Membrane Proteins Studied by Deterium Solid State NMR Relaxation

2016 ◽  
Vol 110 (3) ◽  
pp. 73a
Author(s):  
Xiaolin Xu ◽  
Andrey V. Struts ◽  
Aswini Kumar Giri ◽  
Trivikram R. Molugu ◽  
Charitha Guruge ◽  
...  
Keyword(s):  
Solid State ◽  
Membrane Proteins ◽  
Solid State Nmr ◽  
Nmr Relaxation ◽  
Methyl Groups

Experimental 13C and 1H Solid-State NMR Response in Weakly Tetrel-Bonded Methyl Groups

2021 ◽  
Vol 125 (3) ◽  
pp. 2111-2123
Author(s):  
Scott A. Southern ◽  
Michael S. West ◽  
Maressa J. Z. Bradshaw ◽  
David L. Bryce
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Methyl Groups

Study of Polyethylene by Solid State NMR Relaxation and Spin Diffusion

1997 ◽  
Vol 30 (8) ◽  
pp. 2474-2481 ◽  
Author(s):  
R. R. Eckman ◽  
P. M. Henrichs ◽  
A. J. Peacock
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Spin Diffusion ◽  
Nmr Relaxation

scholarly journals High-Resolution Structural Insights into Bone: A Solid-State NMR Relaxation Study Utilizing Paramagnetic Doping

2012 ◽  
Vol 116 (38) ◽  
pp. 11656-11661 ◽  
Author(s):  
Kamal H. Mroue ◽  
Neil MacKinnon ◽  
Jiadi Xu ◽  
Peizhi Zhu ◽  
Erin McNerny ◽  
...  
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Solid State Nmr ◽  
Nmr Relaxation ◽  
Relaxation Study ◽  
Structural Insights

scholarly journals Characterization of water in hydrated Bombyx mori silk fibroin fiber and films by 2H NMR relaxation and 13C solid state NMR

2017 ◽  
Vol 50 ◽  
pp. 322-333 ◽  
Author(s):  
Tetsuo Asakura ◽  
Kotaro Isobe ◽  
Shunsuke Kametani ◽  
Obehi T. Ukpebor ◽  
Moshe C. Silverstein ◽  
...  
Keyword(s):  
Solid State ◽  
Bombyx Mori ◽  
Silk Fibroin ◽  
Solid State Nmr ◽  
Nmr Relaxation ◽  
2H Nmr ◽  
Silk Fibroin Fiber ◽  
Bombyx Mori Silk
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