Deuterium NMR Characterization of 1,2-Polybutadiene Local Dynamics in Dilute Solution

1995 ◽  
Vol 28 (22) ◽  
pp. 7549-7557 ◽  
Author(s):  
Wei Zhu ◽  
M. D. Ediger
Keyword(s):  
Deuterium Nmr ◽  
Dilute Solution ◽  
Local Dynamics ◽  
Nmr Characterization

ChemInform Abstract: Deuterium NMR Characterization of Broensted Acid Sites and Silanol Species in Zeolites.

ChemInform ◽  
2010 ◽  
Vol 26 (34) ◽  
pp. no-no
Author(s):  
J. M. KOBE ◽  
T. J. GLUSZAK ◽  
J. A. DUMESIC ◽  
T. W. ROOT
Keyword(s):  
Acid Sites ◽  
Deuterium Nmr ◽  
Nmr Characterization

Deuterium NMR Characterization of Broested Acid Sites and Silanol Species in Zeolites

1995 ◽  
Vol 99 (15) ◽  
pp. 5485-5491 ◽  
Author(s):  
J. M. Kobe ◽  
T. J. Gluszak ◽  
J. A. Dumesic ◽  
T. W. Root
Keyword(s):  
Acid Sites ◽  
Deuterium Nmr ◽  
Nmr Characterization

NMR characterization of complex natural products: Assigning novel, proton-deficient alkaloid scaffolds

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
KR Gustafson ◽  
STS Chan ◽  
D Milanowski
Keyword(s):  
Natural Products ◽  
Nmr Characterization

Synthesis and 31 P NMR characterization of new low toxic highly sensitive pH probes designed for in vivo acidic pH studies

2002 ◽  
Vol 10 (5) ◽  
pp. 1451-1458 ◽  
Author(s):  
Sophie Martel ◽  
Jean-Louis Clément ◽  
Agnès Muller ◽  
Marcel Culcasi ◽  
Sylvia Pietri
Keyword(s):  
Acidic Ph ◽  
Highly Sensitive ◽  
Nmr Characterization ◽  
Low Toxic ◽  
Ph Probes

scholarly journals Characterization of proteoglycan and the proteoglycan-hyaluronic acid complex by electric birefringence

1978 ◽  
Vol 173 (1) ◽  
pp. 237-243 ◽  
Author(s):  
M Isles ◽  
A R Foweraker ◽  
B R Jennings ◽  
T Hardingham ◽  
H Muir
Keyword(s):  
Hyaluronic Acid ◽  
Particle Orientation ◽  
Dilute Solution ◽  
Relaxation Rates ◽  
Acid Complex ◽  
Electric Birefringence ◽  
Partial Alignment ◽  
Uronic Acid Content ◽  
Birefringence Relaxation

An electric field causes partial alignment of macromolecules in a dilute solution. The accompanying changes in the solution birefringence offer a sensitive and quick means of monitoring the rates of particle orientation and hence the size of the solute molecules. Such measurements are reported for dilute solutions of proteoglycans in the absence and presence of added hyaluronic acid. The proteoglycan molecules are shown to be some 580 nm long. In the presence of hyaluronic acid they form aggregates that appear to be consistent with the model previously proposed in which the proteoglycans attach radially to the extended hyaluronic acid chain. The electric-birefringence relaxation rates indicate aggregates of similar length to that of the extended hyaluronic acid chain, with the proteoglycans spaced on average at 29nm intervals. A proteoglycan sample the cystine residues of which had been reduced and alkylated showed no evidence of aggregation with hyaluronic acid up to the concentrations of the acid corresponding to 1% of the total uronic acid content. The electric-birefringence method is shown to have a large potential in the study of associating polysaccharide solutions.

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