Antioxidative potential of melanoidins isolated from a roasted glucose-glycine model
- Autor(en)
- K. H. Wagner, S. Derkits, M. Herr, W. Schuh, I. Elmadfa
- Abstrakt
The antioxidative activity of the total water soluble fraction (sol A), high molecular weight (HMW; MW>12,400 Dalton), low molecular weight (LMW) and the insoluble fraction (IS) of a glucose-glycine model system roasted at 120°C was studied in hydrophilic solutions (PBS buffer, fruit juices; addition: 0.01-0.1%) at ambient temperature and lipophilic (coconut fat, triolein and corn oil; addition: 0.01-0.5%) matrices at 60°C and frying conditions at 200°C. The hydrophilic reducing power in the water-soluble fractions was evaluated with the ABTS [2,2′-azino-bis(3-ethylbenz-thiazoline-6-sulfonic acid)] method. Fat stability was determined by observing the development of the peroxide value and conjugated dienes. All fractions increased the hydrophilic reducing power in the water-soluble fractions as a matter of concentration with highest effects for the 0.1% enrichment. In PBS buffer the HMW was most effective, in fruit juices the IS. A slight antioxidative effect in fats was observed only for 0.5% IS and 0.5% sol A in corn oil. Neither in coconut fat at 200°C nor in triolein at 60°C Maillard reaction products (MRPs) were able to extend shelf life. The results performed describe MRPs as highly antioxidative in water-soluble but less effective in water-insoluble fractions.
- Organisation(en)
- Department für Ernährungswissenschaften
- Externe Organisation(en)
- Universität Wien
- Journal
- Food Chemistry
- Band
- 78
- Seiten
- 375-382
- Anzahl der Seiten
- 8
- ISSN
- 0308-8146
- DOI
- https://doi.org/10.1016/S0308-8146(02)00200-5
- Publikationsdatum
- 2002
- Peer-reviewed
- Ja
- ÖFOS 2012
- 303009 Ernährungswissenschaften
- Schlagwörter
- ASJC Scopus Sachgebiete
- Analytical Chemistry, Food Science
- Link zum Portal
- https://ucris.univie.ac.at/portal/de/publications/antioxidative-potential-of-melanoidins-isolated-from-a-roasted-glucoseglycine-model(91193f91-d042-4c8c-af44-05414144c102).html