tocotrienol--delta and 6-hydroxy-2-5-7-8-tetramethylchroman-2-carboxylic-acid

tocotrienol--delta has been researched along with 6-hydroxy-2-5-7-8-tetramethylchroman-2-carboxylic-acid* in 2 studies

Other Studies

2 other study(ies) available for tocotrienol--delta and 6-hydroxy-2-5-7-8-tetramethylchroman-2-carboxylic-acid

Article	Year
Kinetic study of the quenching reaction of singlet oxygen by α-, β-, γ-, δ-tocotrienols, and palm oil and soybean extracts in solution. Bioscience, biotechnology, and biochemistry, 2014, Volume: 78, Issue:12 Measurements of the singlet oxygen ((1)O2) quenching rates (kQ (S)) and the relative singlet oxygen absorption capacity (SOAC) values were performed for 11 antioxidants (AOs) (eight vitamin E homologues (α-, β-, γ-, and δ-tocopherols and -tocotrienols (-Tocs and -Toc-3s)), two vitamin E metabolites (α- and γ-carboxyethyl-6-hydroxychroman), and trolox) in ethanol/chloroform/D2O (50:50:1, v/v/v) and ethanol solutions at 35 °C. Similar measurements were performed for five palm oil extracts 1-5 and one soybean extract 6, which included different concentrations of Tocs, Toc-3s, and carotenoids. Furthermore, the concentrations (wt%) of Tocs, Toc-3s, and carotenoids included in extracts 1-6 were determined. From the results, it has been clarified that the (1)O2-quenching rates (kQ (S)) (that is, the relative SOAC value) obtained for extracts 1-6 may be explained as the sum of the product {Σ kQ(AO-i) (S) [AO-i]/100} of the rate constant (kQ(AO-i) (S)) and the concentration ([AO-i]/100) of AO-i (Tocs, Toc-3s, and carotenoid) included. Topics: Carotenoids; Chromans; Free Radical Scavengers; Glycine max; Kinetics; Palm Oil; Plant Extracts; Plant Oils; Singlet Oxygen; Solutions; Tocopherols; Tocotrienols; Vitamin E	2014
Tocotrienamines and tocopheramines: reactions with radicals and metal ions. Bioorganic & medicinal chemistry, 2011, Nov-01, Volume: 19, Issue:21 The antioxidant activity of vitamin E (VE) homologs α, γ and δ-tocotrienamines (4b-6b), never studied before, and α, γ and δ-tocopheramines (4a-7a) was investigated by means of different total antioxidant capacity (TAC) tests. In all the test model systems, compounds 4a-7a and 4b-6b showed similar or higher TAC values than the parental vitamin E forms and their physiological metabolites. α-Homologs of VE amines showed markedly higher activity than the VE congeners in the TEAC test, which is tailored for liposoluble antioxidants, while γ-homologs of the amine analogs showed higher activity in the FRAP tests. Kinetics analysis of the reaction with DPPH(·) showed higher second order rate k for 4a than for α-tocopherol (1a). α-Tocopherolquinone 1f was the common main oxidation product for both 1a and α-tocopheramine (4a) exposed to ferric ions or DPPH(·), and the implied oxidative deamination of 4a was accompanied by a nitration reaction of phenolic substrates that were added to the reaction medium. Possible mechanisms of these reactions were studied. Topics: Amines; Biphenyl Compounds; Chromans; Electron Spin Resonance Spectroscopy; Ferric Compounds; Free Radical Scavengers; Kinetics; Magnetic Resonance Spectroscopy; Oxidation-Reduction; Picrates; Vitamin E	2011

Article

Year

Kinetic study of the quenching reaction of singlet oxygen by α-, β-, γ-, δ-tocotrienols, and palm oil and soybean extracts in solution.

Bioscience, biotechnology, and biochemistry, 2014, Volume: 78, Issue:12

Measurements of the singlet oxygen ((1)O2) quenching rates (kQ (S)) and the relative singlet oxygen absorption capacity (SOAC) values were performed for 11 antioxidants (AOs) (eight vitamin E homologues (α-, β-, γ-, and δ-tocopherols and -tocotrienols (-Tocs and -Toc-3s)), two vitamin E metabolites (α- and γ-carboxyethyl-6-hydroxychroman), and trolox) in ethanol/chloroform/D2O (50:50:1, v/v/v) and ethanol solutions at 35 °C. Similar measurements were performed for five palm oil extracts 1-5 and one soybean extract 6, which included different concentrations of Tocs, Toc-3s, and carotenoids. Furthermore, the concentrations (wt%) of Tocs, Toc-3s, and carotenoids included in extracts 1-6 were determined. From the results, it has been clarified that the (1)O2-quenching rates (kQ (S)) (that is, the relative SOAC value) obtained for extracts 1-6 may be explained as the sum of the product {Σ kQ(AO-i) (S) [AO-i]/100} of the rate constant (kQ(AO-i) (S)) and the concentration ([AO-i]/100) of AO-i (Tocs, Toc-3s, and carotenoid) included.

Topics: Carotenoids; Chromans; Free Radical Scavengers; Glycine max; Kinetics; Palm Oil; Plant Extracts; Plant Oils; Singlet Oxygen; Solutions; Tocopherols; Tocotrienols; Vitamin E

2014

Tocotrienamines and tocopheramines: reactions with radicals and metal ions.

Bioorganic & medicinal chemistry, 2011, Nov-01, Volume: 19, Issue:21

The antioxidant activity of vitamin E (VE) homologs α, γ and δ-tocotrienamines (4b-6b), never studied before, and α, γ and δ-tocopheramines (4a-7a) was investigated by means of different total antioxidant capacity (TAC) tests. In all the test model systems, compounds 4a-7a and 4b-6b showed similar or higher TAC values than the parental vitamin E forms and their physiological metabolites. α-Homologs of VE amines showed markedly higher activity than the VE congeners in the TEAC test, which is tailored for liposoluble antioxidants, while γ-homologs of the amine analogs showed higher activity in the FRAP tests. Kinetics analysis of the reaction with DPPH(·) showed higher second order rate k for 4a than for α-tocopherol (1a). α-Tocopherolquinone 1f was the common main oxidation product for both 1a and α-tocopheramine (4a) exposed to ferric ions or DPPH(·), and the implied oxidative deamination of 4a was accompanied by a nitration reaction of phenolic substrates that were added to the reaction medium. Possible mechanisms of these reactions were studied.

Topics: Amines; Biphenyl Compounds; Chromans; Electron Spin Resonance Spectroscopy; Ferric Compounds; Free Radical Scavengers; Kinetics; Magnetic Resonance Spectroscopy; Oxidation-Reduction; Picrates; Vitamin E

2011