Intervention of phenolic compounds in plum technology. 1. Changes during drying

Abstract

The main simple phenolic compounds in plum likely to have an effect on the quality of the fruit were investigated by HPLC. Evolution of the compounds and of polyphenoloxidase (PPO) was monitored during the first phase of drying under the effect of different temperatures. The d'Ente plum is characterized by a high neochlorogenic acid content. Neochlorogenic acid content is 2.4 times as high

Effect of Juicing On Nutrition Qualities of “Sanhua” Plum (Prunus Salicina Lindl.) Juice from 4 Cultivars

“…It was previously reported that purple plum cultivar contained significant amount of Cyn-Glu and Cyn-Rut and Cyn-Rut was a major form (Tomás-Barberán et al, 2001, Raynal et al, 1989. treatments had a significant effect on PPO and POD activity and this effect was higher with HB or MB.…”

An Intracellular Laccase is Responsible for the Epicatechin Mediated Anthocyanin Degradation in Litchi Fruit Pericarp

“…Polyphenol oxidases (PPOs) and peroxidase (POD) are the main enzymes that oxidize anthocyanins in fruit extracts, leading to the decrease in pigment content (Sarni et al, 1995;Kader et al, 1998). PPO and POD activities were detected during the change in color of litchi (Jiang and Fu, 1998;Zhang et al, 2005;Sun et al, 2008) and bayberry fruits (Myrica rubra; Fang et al, 2007) after harvest, and during the drying of plums (Raynal et al, 1989). The hydrolysis of anthocyanin catalyzed by b-glycosidases results in the breaking of the glycosidic bond and liberation of the corresponding anthocyanidin, which is then spontaneously converted to a colorless pseudobase (Huang, 1956), or subsequently oxidized by PPO and POD (Zhang et al, 2001(Zhang et al, , 2005.…”

A New Bipyrrole and Some Phenolic Constituents in Prunes (Prunus domesticaL.) and Their Oxygen Radical Absorbance Capacity (ORAC)

“…[5][6][7] However, in our previous studies, the contribution of CQA isomers to the antioxidant activity of prunes revealed to be 28.4% on the basis of the ORAC, and it is suggested that residual ORAC depends on other antioxidant components. 8,9) In the present study, isolation and structural elucidation of unknown antioxidants in prunes were performed.…”

“…In these results, it was predicted that these isolated phenolic compounds (1)(2)(3)(4)(5)(6)(7)(8) contribute to the antioxidant activity of prunes. …”