CARATTERIZZAZIONE ED ATTIVITà€ DI ESTRATTI VEGETALI AD ELEVATO CONTENUTO DI POLIFENOLI

Polyphenols are a class of natural chemical substances that can be found in many vegetables. Their main chemical characteristic is the presence of multiple phenolic groups. Among them there are other several subclasses like flavonoids. Flavonoids are important secondary metabolites that can be also found in plants. Flavonoids are based around a phenylbenzopyrone structure. In general plants alone possess the biosynthetic ability. Flavonoid were found also in primitive plant species like green algae and they survived through evolution. Flavonoids can be divided in several subclasses depending on their sustituents. Moreover flavonoids have other substitution patterns with addition hydroxyl, methyl, methoxyl and glycosil groups.