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Selected Publication:

Kivela, R; Henniges, U; Sontag-Strohm, T; Potthast, A.
(2012): Oxidation of oat beta-glucan in aqueous solutions during processing
CARBOHYD POLYM. 2012; 87(1): 589-597. FullText FullText_BOKU

Abstract:
The study investigated carbonyl group formation along the chain and the chain cleavage of cereal beta-glucan during heat treatments, high pressure homogenisation, cold storage and ascorbic acid treatment of aqueous solutions of this soluble dietary fibre. The carbonyl group content and its distribution along the chain were simultaneously determined with the chain cleavage using a HPSEC/labelling method, originally developed for water-insoluble cellulose. Ascorbic acid treatment resulted in a relatively high degree of carbonyl content and extensive degradation of beta-glucan, even in concentrations typically found in foods. The thermal oxidation of the beta-glucan was considerable at 120 C in a beta-glucan solution with co-extracted compounds from oat ingredient, and in the highly purified solutions in presence of ferrous ions. Oxidation also probably contributed to the molecular properties during high pressure homogenisation, even thou the main degradation mechanism is the hydrolysis caused by mechanical energy. In addition to the cleavage of the beta-glucan chain, the formation of compact, high molar mass species or molecule clusters were obtained in the study after ascorbic acid, heat (120 degrees C) and homogenisation treatments. (C) 2011 Elsevier Ltd. All rights reserved.
Authors BOKU Wien:
Henniges Ute
Potthast Antje
BOKU Gendermonitor:


Find related publications in this database (Keywords)
Oxidation
beta-Glucan
Ascorbic acid
High pressure homogenisation
Heating


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