In order to quantify antioxidant capacity in food products, several methods have been proposed over the years. Among them, DPPH radical is widely used to determine the antioxidant capacity of different substrates. However, it is known that different types of extractants, providing different responses, can extract a variety of bioactive compounds. Besides, storage time seems to interfere in the stability of these substances. Integral use of fruits and vegetables has been proposed along the years as a means of reducing environmental pollution and give a better destination to by-products from food industries. Thus, this study aimed to evaluate the antioxidant potential of a fruit and vegetables residue flour (FVR) with sequential and non-sequential extraction, in order to evaluate its antioxidant activity and phenolic compounds. And these compounds stability during storage of 180 days. It w...

In order to quantify antioxidant capacity in food products, several methods have been proposed over the years. Among them, DPPH radical is widely used to determine the antioxidant capacity of different substrates. However, it is known that different types of extractants, providing different responses, can extract a variety of bioactive compounds. Besides, storage time seems to interfere in the stability of these substances. Integral use of fruits and vegetables has been proposed along the years as a means of reducing environmental pollution and give a better destination to by-products from food industries. Thus, this study aimed to evaluate the antioxidant potential of a fruit and vegetables residue flour (FVR) with sequential and non-sequential extraction, in order to evaluate its antioxidant activity and phenolic compounds. And these compounds stability during storage of 180 days. It w...

Among the native species of importance in Brazil, jabuticabeira (Myrciaria sp.) is a native fruit tree from several Brazilian regions. Few studies report the chemical constituents of the leaves and its pharmacological and nutraceutical properties. The aim of this study was to identify the phenolic compounds of the methanolic (MeOH) and ethanolic (EtOH) leaf extracts of Myrciaria sp. Phytochemical profile of the extracts was carried-out using High Performance Liquid Chromatography (HPLC) analysis. Antioxidant potential was evaluated by radical scavenging capacity with 2,2-diphenyl-1-picryl-hydrazyl (DPPH) and total phenolics were determined with Folin-Ciocalteau reagent. A total of nine different compounds were identified in the free and bound phenolics extractions: 2,4 dihydroxybenzoic, vanillin, p-coumaric, ferulic, sinapinic, rutin, epicatechin, trans-caffeic and myricetin. The extract...

Among the native species of importance in Brazil, jabuticabeira (Myrciaria sp.) is a native fruit tree from several Brazilian regions. Few studies report the chemical constituents of the leaves and its pharmacological and nutraceutical properties. The aim of this study was to identify the phenolic compounds of the methanolic (MeOH) and ethanolic (EtOH) leaf extracts of Myrciaria sp. Phytochemical profile of the extracts was carried-out using High Performance Liquid Chromatography (HPLC) analysis. Antioxidant potential was evaluated by radical scavenging capacity with 2,2-diphenyl-1-picryl-hydrazyl (DPPH) and total phenolics were determined with Folin-Ciocalteau reagent. A total of nine different compounds were identified in the free and bound phenolics extractions: 2,4 dihydroxybenzoic, vanillin, p-coumaric, ferulic, sinapinic, rutin, epicatechin, trans-caffeic and myricetin. The extract...