Related Experiment Video
Updated: Jan 27, 2026

Quantification of Violacein in Chromobacterium violaceum and Its Inhibition by Bioactive Compounds
Published on: August 8, 2025
Influence of processing conditions on bioactive compound extraction from Vitis vinifera L. var. Alicante Bouschet
Yineth Ruíz-García1, Carolina Beres2, Davy W H Chávez1,3
11Universidade Federal Rural do Rio de Janeiro (UFRRJ) - Programa de Pós-Graduação em Ciência e Tecnologia de Alimentos, Rodovia BR 465 - km 7, Campus Universitário - Seropédica, Rio de Janeiro, RJ 23851-970 Brazil.
Abstract:
The aim of this study was to evaluate the effects of process conditions on the solid-liquid extraction of bioactive compounds from the Alicante Bouschet grape skin from the semi-arid region of Brazil. The influence of temperature (23-57 °C), ethanol concentration (16-84%) and citric acid concentration (0-4%) on the total phenolic content, monomeric anthocyanin content and on the antioxidant capacity of the extracts measured by oxygen radical absorbance capacity and cation radical scavenging activity (ABTS·+) methods was investigated. Ethanol concentration and temperature had a significant influence on total phenolic compounds extraction and antioxidant capacity while monomeric anthocyanins extraction was only affected by ethanol concentration. The conditions selected as the most adequate for the extraction were: temperature of 40 °C, 50% v/v ethanol and 2% m/v citric acid.
Related Concept Videos
Solubility of Ionic Compounds
Molecules and Compounds
Organic Compounds
Elements and Compounds
Elements
Elements are classified as atomic or molecular based on the nature of their basic units. They are unique forms of matter with specific chemical and physical properties that cannot break down into smaller substances by ordinary chemical reactions. There...
Classification of Elements and Compounds
Compounds are pure substances composed of two or more elements in fixed, definite proportions. Compounds are classified as ionic or molecular (covalent) based on the bonds...
Coordination Compounds and Nomenclature

