ESR Spectrometry: A Future-Oriented Tool for Dosimetry and Dating

ChemInform ◽  
2005 ◽  
Vol 36 (29) ◽  
Author(s):  
Dieter F. Regulla
Keyword(s):  
Esr Spectrometry

ChemInform Abstract: The Bubble Electrode, a New Electrode for the Combination of Voltammetry, Electrolysis, and ESR Spectrometry.

ChemInform ◽  
1988 ◽  
Vol 19 (27) ◽  
Author(s):  
R. N. BAGCHI ◽  
A. M. BOND ◽  
F. SCHOLZ ◽  
R. STOESSER
Keyword(s):  
Esr Spectrometry

Formation of ternary copper(II) complexes at the surface of silica gel as studied by ESR spectrometry

1982 ◽  
Vol 21 (5) ◽  
pp. 1771-1777 ◽  
Author(s):  
Alex. Von Zelewsky ◽  
Jean Marie. Bemtgen
Keyword(s):  
Silica Gel ◽  
Esr Spectrometry

An investigation of anthraquinone-catalysed alkaline pulping via component modeling and electron spin resonance experiments

1980 ◽  
Vol 58 (18) ◽  
pp. 1983-1992 ◽  
Author(s):  
M. B. Hocking ◽  
H. I. Bolker ◽  
B. I. Fleming
Keyword(s):  
Electron Spin Resonance ◽  
Electrode Potential ◽  
Radical Anion ◽  
Aqueous Alkaline Solution ◽  
Alkaline Pulping ◽  
Methanol Solutions ◽  
Spin Resonance ◽  
First Time ◽  
Reduced Forms ◽  
Esr Spectrometry

The radical anion of anthraquinone (AQ•−) has been generated by the reduction of anthraquinone (AQ) with sugars in aqueous alkaline solution. This appears to be the first time that the radical has been observed (esr spectrometry) in an entirely aqueous medium. Alkaline methanol solutions of AQ, when irradiated with light, yielded colourless solutions also exhibiting strong esr signals characteristic of. AQ•−.The ability of various carbohydrate and lignin preparations to reduce AQ, or to oxidize the reduced forms of AQ, was also investigated, both by direct observation and by electrode potential measurements. In very concentrated alkali, AQ was reduced by glucose to a green solid thought to be a quinhydrone.

Disinfection of Virus in Water by Active Oxygen Species

1993 ◽  
Vol 28 (7) ◽  
pp. 239-242 ◽  
Author(s):  
Akira Hamada ◽  
Masafumi Hakoda ◽  
Hideo Utsumi
Keyword(s):  
Spin Trap ◽  
Active Oxygen Species ◽  
Preliminary Test ◽  
Active Oxygen ◽  
Radical Scavenger ◽  
Polio Virus ◽  
Fenton’S Reaction ◽  
Solution Treated ◽  
Trapping Method ◽  
Esr Spectrometry

Identification of the species of active oxygen generated in water by chlorination or ozonation was carried out by the spin trapping method using DMPO as the spin trap agent with ESR spectrometry. On chlorinating with NaOCl solution (15 mg/litre), typical ESR signals for DMPO-OH adduct were observed. Increasing the concentration of NaOCl, however, caused complex spectra to appear. The addition of thiourea or D-mannitol, as a radical scavenger, did not significantly affect on the intensity of the signals. On ozonation, two radicals, DMPO-OH and an unknown radical, were always observed. These results indicate the generation of several radicals in the solution treated with NaOCl and ozone. An interaction of the polio virus with ♦OH was also studied. The preliminary test showed that the ♦OH generated by Fenton's reaction slightly disinfected the virus. Precise tests changing the concentration of active oxygen and the reaction condition are currently in progress.

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