13C NMR Characterization of Solid Fossil Fuels Using Cross-Polarization and Magic-Angle Spinning

1982 ◽  
pp. 319-343 ◽  
Author(s):  
GARY E. MACIEL ◽  
MARK J. SULLIVAN
Keyword(s):  
13C Nmr ◽  
Fossil Fuels ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Polarization ◽  
Nmr Characterization ◽  
Angle Spinning

A Cross-Polarization Magic-Angle Spinning 13C NMR Characterization of the Stable Solid-State Forms of Cimetidine

1997 ◽  
Vol 86 (12) ◽  
pp. 1400-1402 ◽  
Author(s):  
David A. Middleton ◽  
Cecile S. Le Duff ◽  
Frederic Berst ◽  
David G. Reid
Keyword(s):  
Solid State ◽  
13C Nmr ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Polarization ◽  
Nmr Characterization ◽  
Angle Spinning

scholarly journals Facile Characterization of Polymer-Supported Reagents Using Cross Polarization Magic Angle Spinning Method in Solid State 13C-NMR

2004 ◽  
Vol 52 (7) ◽  
pp. 864-865
Author(s):  
Kazuaki Shikii ◽  
Hiroko Seki ◽  
Kentaro Yamaguchi ◽  
Wannaporn Disadee ◽  
Toshiko Watanabe ◽  
...  
Keyword(s):  
Solid State ◽  
13C Nmr ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Polarization ◽  
Polymer Supported ◽  
Angle Spinning ◽  
Solid State 13C Nmr

Solid State 13C NMR Applied to Styrene-Butadiene Rubbers Study of the Rubber Vulcanized Network Structures

2002 ◽  
Vol 75 (1) ◽  
pp. 65-76 ◽  
Author(s):  
L. Pellicioli ◽  
S. K. Mowdood ◽  
F. Negroni ◽  
D. D. Parker ◽  
J. L. Koenig
Keyword(s):  
13C Nmr ◽  
Structural Changes ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Nmr Spectrum ◽  
Polymer Microstructure ◽  
Polybutadiene Rubber ◽  
Angle Spinning ◽  
Styrene Butadiene

Abstract This paper discusses the structural changes that occur during the accelerated sulfur vulcanization of styrene-butadiene rubbers (SBR) through characterization of the network sulfide structures influenced by the curing agent concentration, the polymer microstructure, and the nature of the filler. Magic angle spinning (MAS) 13C FT - NMR spectroscopy was used to investigate the chemical crosslink properties of unfilled vulcanized SBR in addition to carbon black and silica filled polybutadiene rubber (BR), SBR, and 1:1 BR / SBR blends. New resonances in the 13C NMR spectrum are assigned to the various sulfide crosslink structures in SBR. Structural changes during vulcanization are also discussed.

Preparation, Characterization of Cellulose Fibers Grafting by β-Cyclodextrin and their Application for Antibacterial Products

2014 ◽  
Vol 936 ◽  
pp. 784-788 ◽  
Author(s):  
Chao Dong ◽  
Ying Ye ◽  
Li Ying Qian ◽  
Bei Hai He ◽  
Hui Ning Xiao
Keyword(s):  
Inclusion Complexes ◽  
Cellulose Fiber ◽  
Cellulose Fibers ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Food Chemistry ◽  
Cross Polarization ◽  
Angle Spinning ◽  
Cp Mas Nmr

Cyclodextrins (CDs) can form inclusion complexes with a variety of molecules making them very attractive in different areas, such as pharmaceutics, biochemistry, food chemistry and papermaking. In this communication the preparation of β-cyclodextrin-grafted cellulose fibers was carried out by reacting β-cyclodextrin with cellulose fiber via citric acid (CA). Both fourier transform infrared (FTIR) and cross polarization magic angle spinning solid state nuclear magnetic resonance (CP-MAS NMR) indicated that β-CDs had been chemically attached to cellulose backbone through the formation of ester bonds. Furthermore, the β-CD-grafted cellulose fibers formed inclusion complexes with ciprofloxacin hydrochloride (CipHCl). And the β-CD-grafted cellulose fibers loaded with CipHCl showed excellent antibacterial activity against E.coli and S.aureus.

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