Publication: Electron spin resonance investigation of free radicals produced in pulverized non-irradiated sugar
Issued Date
2011-07-10
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ISSN
02179792
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2-s2.0-79959936447
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Mahidol University
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SCOPUS
Bibliographic Citation
International Journal of Modern Physics B. Vol.25, No.17 (2011), 2383-2391
Suggested Citation
K. Thamaphat, P. Limsuwan, S. M. Smith Electron spin resonance investigation of free radicals produced in pulverized non-irradiated sugar. International Journal of Modern Physics B. Vol.25, No.17 (2011), 2383-2391. doi:10.1142/S0217979211100813 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/12845
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Title
Electron spin resonance investigation of free radicals produced in pulverized non-irradiated sugar
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Abstract
An electron spin resonance (ESR) study of the effects of pulverization on non-irradiated crystalline sugar was performed. It indicated that the crystalline sugar before being ground did not give any ESR signal but an ESR signal was found in pulverized sugar. These results implied that free radicals were produced by pulverization. Moreover, the free radical density increased as the particle size decreased. From high-performance liquid chromatography analysis and the ESR spectrum of non-irradiated powdered sucrose, it can be inferred that the pulverization-induced free radical in sugar is a sucrose radical. Recently, many researchers have reported that sugar irradiated with 60 Co γ-rays at different doses produced stable sucrose radicals. This may imply that the process of sucrose radical formation by mechanical stress is similar to that for irradiation. © 2011 World Scientific Publishing Company.