Abstract
Based on experimental data on the buildup of citric acid and dicarboxylic (succinic, malic, fumaric, tartaric, and malonic) acids in native starches, low-temperature ESR measurement results, and reaction rate- or reaction yield-detected magnetic resonance data (room temperature, cellulose), the sequences of elementary events (mechanisms) of transformation of free radicals in the anhydroglucose ring of glucose high polymers up to the formation of these acids were determined. Time ranges for the generation of radicals in reactions, such as dehydration (Н2О β-elimination), oxygenation, isomerization involving C–C and C–O bond cleavage, and rearrangement of C–H bonds, were estimated at (3–7) × 10–9 to (8–10) × 10–8 s.
Similar content being viewed by others
REFERENCES
Korotchenko, K.A., Stanimirovich, S.G., and Stanimirovich, D.L., Prikl. Biokhim. Mikrobiol., 1968, vol. 4, no. 6, p. 727.
Sharpatyi, V.A., Khim. Fiz., 1995, vol. 14, no. 10, p. 113.
Korotchenko, K.A. and Sharpatyi, V.A., Khim. Vys. Energ., 1993, vol. 27, no. 4, p. 50.
Pristupa, A.I. and Sharpatyi, V.A., Dokl. Akad. Nauk, 1998, vol. 359, no. 1, p. 58.
Pristupa, A.I. and Sharpatyi, V.A., Dokl. Akad. Nauk, 2002, vol. 387, no. 5, p. 643.
Milinchuk, V.K., Klinshpont, E.R., and Pshezhetskii, S.Ya., Makroradikaly (Macroradicals), Moscow: Khimiya, 1980.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Korotchenko, K.A., Pristupa, A.I. & Sharpatyi, V.A. Radiation Chemistry of Polysaccharides: 2. Free-Radical Mechanisms of Formation of Citric Acid and Dicarboxylic Acids. High Energy Chemistry 38, 81–85 (2004). https://doi.org/10.1023/B:HIEC.0000020552.12516.95
Issue Date:
DOI: https://doi.org/10.1023/B:HIEC.0000020552.12516.95