title: Antioxidant activities of tocopherols/tocotrienols and lipophilic antioxidant capacity of wheat, vegetable oils, milk and milk cream by using photochemiluminescence.
abstract: The purpose of this study was to measure the antioxidant activity (AOA) of tocopherols and tocotrienols by using photochemiluminescence (PCL). This method enables to detect total lipophilic antioxidants. The AOA of all vitamin E isomers depended on number and position of methyl groups in the chroman ring. Correlation between the AOA and the redox potential and the biological activity of the tocochromanols was observed. The second aim was to analyse different kinds of wheat, vegetable oils, milk and milk cream on their antioxidant capacity (AOC) by using PCL and α-TEAC. The contents of vitamin E and carotenoids were analysed by HPLC. Correlations between the sum of carotenoids and vitamin E and the AOC were detected. Based on high vitamin E contents, the oils had the highest and in contrast, the product macaroni showed the lowest AOC. A concentration-dependent effect was observed in both assays, PCL and α-TEAC.
authors.affiliation: Institute of Nutrition, Friedrich Schiller University Jena, Dornburger Straße 25-29, D-07743 Jena, Germany.
authors.forename: Jasmin
authors.initials: J
authors.lastname: Karmowski
authors.affiliation: Institute of Nutrition, Friedrich Schiller University Jena, Dornburger Straße 25-29, D-07743 Jena, Germany.
authors.forename: Victoria
authors.initials: V
authors.lastname: Hintze
authors.affiliation: Institute of Nutrition, Friedrich Schiller University Jena, Dornburger Straße 25-29, D-07743 Jena, Germany.
authors.forename: Josephine
authors.initials: J
authors.lastname: Kschonsek
authors.affiliation: Analytik Jena AG, Jena, Germany.
authors.forename: Margrit
authors.initials: M
authors.lastname: Killenberg
authors.affiliation: Institute of Nutrition, Friedrich Schiller University Jena, Dornburger Straße 25-29, D-07743 Jena, Germany. Electronic address: volker.boehm@uni-jena.de.
authors.forename: Volker
authors.initials: V
authors.lastname: Böhm
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000032:analysis / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D008163:Luminescent Measurements / Q000379:methods; D008892:Milk / Q000737:chemistry*; D055668:Photochemical Processes; D010938:Plant Oils / Q000737:chemistry*; D026082:Singlet Oxygen / Q000737:chemistry; D024505:Tocopherols / Q000032:analysis / Q000737:chemistry*; D024508:Tocotrienols / Q000032:analysis / Q000737:chemistry*; D014908:Triticum / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D010938:Plant Oils; D024508:Tocotrienols; D026082:Singlet Oxygen; D024505:Tocopherols
keywords: Carotenoids; Lipophilic antioxidants; Redox potential; Singlet oxygen; α-Tocopherol (PubChem CID: 14985); α-Tocotrienol (PubChem CID: 5282347); β-Tocopherol (PubChem CID: 6857447); β-Tocotrienol (PubChem CID: 5282348); γ-Tocopherol (PubChem CID: 92729); γ-Tocotrienol (PubChem CID: 5282349); δ-Tocopherol (PubChem CID: 92094); δ-Tocotrienol (PubChem CID: 5282350)