Influence of hydrothermal treatment on the structural modification of spent grain specific carbohydrates and the formation of degradation products using model compounds

authored by: Julia Steiner, Knut Franke, Martina Kießling, Fischer S., Stefan Töpfl, Volker Heinz, Thomas Becker
Abstract: Brewer's spent grain (BSG) constitutes various valuable carbohydrates that may contribute to a healthy diet. These components may be obtained from BSG via hydrothermal treatment (HT), a procedure for dissolving water-inextricable carbohydrates. The objective of this study was to investigate HT as an environmentally friendly technology for extracting high-molecular-weight fiber with proven beneficial effects on human health. Cellulose, β-glucan, and arabinoxylan (AX) served as model substances and were subjected to auto-hydrolysis at different temperatures and reaction times. The results were evaluated in terms of structural and chemical characteristics. When the treatment temperature was increased, the original weight-average molar mass of AX (370 kDa) and β-glucan (248 kDa) decreased gradually (<10 kDa), and the molar mass distribution narrowed. Further investigations focused on the heat-induced formation and elimination of monosaccharides and undesirable by-products. The concentrations of by-products were successfully described by kinetic models that can be used to optimize the hydrolysis process.
Organisation(s): Institute of Food Science and Human Nutrition
Food Technology Section
External Organisation(s): Technical University of Munich (TUM)
German Institute of Food Technology (DIL e.V.)
Type: Article
Journal: Carbohydrate polymers
Volume: 184
Pages: 315-322
No. of pages: 8
ISSN: 0144-8617
Publication date: 15.03.2018
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Organic Chemistry, Polymers and Plastics, Materials Chemistry
Sustainable Development Goals: SDG 3 - Good Health and Well-being
Electronic version(s): https://doi.org/10.1016/j.carbpol.2017.12.038 (Access: Closed)