dc.contributor.supervisor |
Beta, Trust (Food Science) |
en_US |
dc.contributor.author |
Guo, Weiwei
|
|
dc.date.accessioned |
2012-08-23T16:30:39Z |
|
dc.date.available |
2012-08-23T16:30:39Z |
|
dc.date.issued |
2012-08-23 |
|
dc.identifier.uri |
http://hdl.handle.net/1993/8462 |
|
dc.description.abstract |
The extraction yields of insoluble dietary fibre (IDF) and soluble dietary fibre (SDF) from seven whole-grain cereals (WG) ranged from 11.73% to 23.71% and 2.28% to 5.15%, respectively. Eight monomeric phenolic acids and four diferulic acids were identified and quantified in cereal alkaline extracts by reversed phase high performance liquid chromatography coupled with quadrupole - time of flight mass spectrometry. IDF alkaline extracts had significantly (p < 0.05) higher levels of total phenolic content (TPC) and DPPH radical scavenging activity than WG and SDF extracts. Corn IDF (C-IDF) extracts exhibited the highest TPC and DPPH, followed by red rice. MTT cell viability assay indicated that 2,2'-azobis (2-amidinopropane) dihydrochloride (AAPH) or xanthine-xanthine oxidase (X-XO) induced cell loss can be effectively reduced by pre-incubating Caco-2BBe or FHs 74 Int cells with certain levels of C-IDF extracts. This effect was speculated to be associated with the antioxidant activity of C-IDF linked phenolic compounds. |
en_US |
dc.rights |
info:eu-repo/semantics/openAccess |
|
dc.subject |
whole-grain cereals |
en_US |
dc.subject |
insoluble dietary fibre |
en_US |
dc.subject |
soluble dietary fibre |
en_US |
dc.subject |
alkaline extracts |
en_US |
dc.subject |
antioxidant activity |
en_US |
dc.title |
Antioxidant properties of alkaline extracts from insoluble and soluble dietary fibre derived from selected whole-grain cereals |
en_US |
dc.type |
info:eu-repo/semantics/masterThesis |
|
dc.degree.discipline |
Food Science |
en_US |
dc.contributor.examiningcommittee |
Fulcher, Gary (Food Science) Netticadan, Thomas (Physiology) |
en_US |
dc.degree.level |
Master of Science (M.Sc.) |
en_US |
dc.description.note |
October 2012 |
en_US |