cinnamtannin-a2 has been researched along with procyanidin* in 2 studies
2 other study(ies) available for cinnamtannin-a2 and procyanidin
| Article | Year |
|---|---|
Catechins and their oligomers linked by C4 --> C8 bonds are major cacao polyphenols and protect low-density lipoprotein from oxidation in vitro.
In vitro effects of catechins and their oligomers linked by C4 --> C8 bonds are major antioxidative components of chocolate and cocoa. Their effects on the susceptibility of human low-density lipoprotein (LDL) to oxidation were evaluated. The strength of the antioxidative activity was measured using copper ions as the radical generator as compared by weight varied in the following order: (+)-catechin > procyanidin B2 > or = (-)-epicatechin > or = procyanidin C1 > cinnamtannin A2. Using 2,2'-azobis (4-methoxy-2,4-dimethylvaleronitrile) (MeO-AMVN) as the radical generator, the order was (-)-epicatechin > or = procyanidin B2 > or = procyanidin C1 > (+)-catechin > or = cinnamtannin A2. It is suggested that these compounds contribute to the activity of cacao products to protect LDL from oxidation. Topics: Anthocyanins; Antioxidants; Arteriosclerosis; Azo Compounds; Biflavonoids; Cacao; Catechin; Humans; In Vitro Techniques; Lipoproteins, LDL; Nitriles; Oxidants; Oxidation-Reduction; Phytotherapy; Plant Preparations; Proanthocyanidins | 2002 |
Analyses of polyphenols in cacao liquor, cocoa, and chocolate by normal-phase and reversed-phase HPLC.
The antioxidant polyphenols in cacao liquor, a major ingredient of chocolate and cocoa, have been characterized as flavan-3-ols and proanthocyanidin oligomers. In this study, various cacao products were analyzed by normal-phase HPLC, and the profiles and quantities of the polyphenols present, grouped by molecular size (monomers to approximately oligomers), were compared. Individual cacao polyphenols, flavan-3-ols (catechin and epicatechin), and dimeric (procyanidin B2), trimeric (procyanidin C1), and tetrameric (cinnamtannin A2) proanthocyanidins, and galactopyranosyl-ent-(-)-epicatechin (2alpha-->7, 4alpha-->8)-(-)-epicatechin (Gal-EC-EC), were analyzed by reversed-phase HPLC and/or HPLC/MS. The profile of monomers (catechins) and proanthocyanidin in dark chocolate was similar to that of cacao liquor, while the ratio of flavan-3-ols to the total amount of monomeric and oligomeric polyphenols in the case of pure cocoa powder was higher than that in the case of cacao liquor or chocolate. Topics: Anthocyanins; Biflavonoids; Cacao; Catechin; Chromatography, High Pressure Liquid; Chromatography, Liquid; Flavonoids; Food Handling; Galactose; Mass Spectrometry; Phenols; Polymers; Proanthocyanidins; Reproducibility of Results | 2000 |