A liquid bio-flavanoid concentrate “Red aladasturi”

Abstract

This paper dwells on the uvological characteristics of “Aladasturi” colored grape variety raw materials growing in the viticulture and winemaking zone of Imereti (Georgia), as well as biologically active compounds and antioxidant activity of hydrophilic extracts and liquid concentrates of its solid matters (stone and skin). The amount of phenolic compounds was determined using Folin Chocalteu reagent. The flavonoid, catechin and anthocyanin contents were determined by spectral methods, and antioxidant activity was determined by DPPH method. Research resulted in the establishment of the dynamics of changes in the biologically active compound content in test samples of “Aladasturi” variety growing in certain zones of Imereti region according to its growing areas. „The bio- flavanoid concentrate “Red Aladasturi” containing 64-75% of solid matters, which was thickened by vacuum-sublimation method constitues a composition of the following components: 33% grape-stone ethanol extract, 33% grape-stone super-fluid extract and 33% grape-skin hydrophilic extracts. It has been established that the bio-flavanoid liquid concentrate “Red Aladasturi” is strong antioxidant (55.31-57.45%), and one tablespoon or 8-9 ml of it contains 52-57 mg of flavanoids, which is 109-112% of a full day of rations per person per day.