Degradation kinetics of trisaccharides comprised of glucose residues in subcritical water.

Degradation kinetics of three trisaccharides, i.e., maltotriose, isomaltotriose, and panose, in subcritical water at 190, 200, 220, and 240°C were studied and compared. Irreversible, first-order reaction for each step of the degradation was applied to evaluate the rate constants for trisaccharide, disaccharide, and monosaccharide degradations. Estimation of reaction rate constants indicated that the overall degradation rates decreased in the following order: maltotriose > panose > isomaltotriose; therefore, it could be concluded that α-1,4-glycosidic bond is more easily cleaved than α-1,6-glycosidic bond in subcritical water. The temperature dependency for rate constants could be described by the Arrhenius equation. [ABSTRACT FROM PUBLISHER]

Copyright of Journal of Carbohydrate Chemistry is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)