A new chemical pathway yielding A-type vitisins in red wines is proposed herein from the reaction between anthocyanins and oxaloacetic acid (OAA). This new chemical path is thought to occur in the first stages of the wine production even during the fermentation process. This is due to the revealed high reactivity of OAA with anthocyanins compared with the already known precursor (pyruvic acid, ...

The aim of this study was to determine anthocyanin content and antioxidant activity of 20 different grape varieties, using HPLC and DPPH, FRAP and ABTS assays, respectively. The identified anthocyanins were malvidin-3-glucoside, delphinidin-3-glucoside, petunidin-3-glucoside, cyanidin3 glucoside, and peonidin-3-glucoside on the basis of their retention times. Comparatively the total anthocyanin...

Two huckleberry species, Vaccinium membranaceum and Vaccinium ovatum, native to Pacific Northwestern North America, were evaluated for their total, and individual, anthocyanin and polyphenolic compositions. Vaccinium ovatum had greater total anthocyanin (ACY), total phenolics (TP), oxygen radical absorbing capacity (ORAC), and ferric reducing antioxidant potential (FRAP) than did V. membranaceu...

The anthocyanin composition and HPLC fingerprints of six small berries endemic of the VIII region of Chile were investigated using high resolution mass analysis for the first time (HR-ToF-ESI-MS). The antioxidant features of the six endemic species were compared, including a variety of blueberries which is one of the most commercially significant berry crops in Chile. The anthocyanin fingerprin...

Numerous studies have provided evidence that diets rich in anthocyanins show a broad spectrum of health benefits. Anthocyanins nature are usually found the form glycosides. Their aglycone forms called anthocyanidins. The chemical structure is based on flavylium cation, but they differ position and number substituents. However, bioactives foods contain them frequently treated as uniform group co...

Carissa edulis Vahl (Apocynaceae) is a plant whose leaves, roots and fruits are traditionally employed for the treatment of malaria, microbial infections, headache, cough, fever ulcer among many others. Fresh were crushed extracted with 70 % methanol 72 hours to obtain MeOH extract. Proximate analysis as well mineral composition fresh determined. Total phenolic content (TPC), total flavonoids (...

Abstract A blueberry anthocyanin extract was obtained from Brightwell fruits cultivated in eastern China and the extraction purification conditions were optimized. The components of identified using ultra-performance liquid chromatography-electrospray ionization interface-mass spectrometer. antioxidant antibacterial activities fruit supernatant (BFS), crude (BCE), rich (BRE) evaluated. yield 1....

From the petroleum ether extract of the aereal part of Condalia microphylla Cav, hydrocarbons, sterols, alcohols, and fatty acids were isolated. From fruits of the same plant anthocyanins were also isolated and characterized by chromatographic and spectroscopic methods. Introduction Condalia microphylla Cav. Species belongs to the Ramnaceae family, and its common name is “Piquillín”. It general...

The pyridinium bisretinoid A2E, an autofluorescent pigment that accumulates in retinal pigment epithelial cells with age and in some retinal disorders, can mediate a detergent-like perturbation of cell membranes and light-induced damage to the cell. The photodynamic events initiated by the sensitization of A2E include the generation of singlet oxygen and the oxidation of A2E at carbon–carbon do...