Nitroxide-controlled free radical copolymerization of styrene and acrylonitrile monitored by electron spin resonance and fourier transform infrared technique in situ

2001 ◽  
Vol 21 (1) ◽  
pp. 49-62 ◽  
Author(s):  
F. J. Hua ◽  
S. M. Chen ◽  
D. S. Lee ◽  
Y. L. Yang
Keyword(s):  
Fourier Transform ◽  
Electron Spin Resonance ◽  
Free Radical ◽  
Electron Spin ◽  
Fourier Transform Infrared ◽  
Radical Copolymerization ◽  
Free Radical Copolymerization ◽  
Spin Resonance

scholarly journals Fourier transform infrared and electron spin resonance examinations of kerogen from the gunflint stromatolitic cherts (Middle Precambrian, Ontario, Canada) and related materials

2000 ◽  
Vol 65 (4) ◽  
pp. 229-244 ◽  
Author(s):  
Pavle Premovic ◽  
Goran Nikolic ◽  
Miroslav Premovic ◽  
Ivana Tonsa
Keyword(s):  
Fourier Transform ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Strong Support ◽  
Fourier Transform Infrared ◽  
Spin Resonance ◽  
The Fourier Transform ◽  
Carbonaceous Rocks ◽  
High Level ◽  
A Minor

Kerogen occurrences in stromatolitic cherts from the Middle Precambrian Gunflint Formation and related rocks have been investigated by the use of elemental analysis, Fourier transform infrared and electron spin resonance spectroscopies. Particular attention was paid to the structural properties of the Schreiber kerogen to allow comparison with biologically controlled kerogens from Paleozoic carbonaceous rocks. The low atomic H/C ratios (0.5) of the Schreiber kerogen indicates that this material has reached a high level of maturity. The Fourier transform infrared/electron spin resonance examinations revealed that the Schreiber kerogen contains predominantly aromatic/polyaromatic structures similar to those found in mature kerogens from Paleozoic carbonaceous rocks. The evidence from this organogeochemical comparison indicates that the Schreiber kerogen and mature kerogens from Paleozoic/Mesozoic carbonaceous rocks have sufficient similarity to suggest a similar origin. Consequently, this work gives strong support to the hypothesis that if the Schreiber kerogen is of biotic origin than it is derived from the remnants of various microbial organisms (mainly phytoplanktons) including a minor contribution of subtidal (stromatolite-building) cyanobacteria.

Fourier transform electron spin resonance imaging

1991 ◽  
Vol 184 (1-3) ◽  
pp. 25-33 ◽  
Author(s):  
Uwe Ewert ◽  
Richard H. Crepeau ◽  
Curt R. Dunnam ◽  
Dajiang Xu ◽  
Sanghyuk Lee ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Resonance Imaging ◽  
Spin Resonance
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