“Study the Effect of Acidified Water and Ethanol by Citric Acid on of Colorants and Bioactive Compounds Extraction from Hibiscus Sabdariffs”. Damascus University Journal for the basic sciences 38, no. 2 (September 20, 2022). Accessed June 18, 2026. https://journal.damascusuniversity.edu.sy/index.php/basj/article/view/6260.