A Comparative Study of Sodium Sulfide and Sodium Hydroxide for Keratin Extraction from Waste Chicken Feathers Based on Response Surface Methodology (RSM). المجلة العلمية لكلية العلوم, [S. l.], v. 6, n. 1, p. 16–23, 2026. DOI: 10.37375/9t5jaj98. Disponível em: https://journal.su.edu.ly/index.php/jsfsu/article/view/3871. Acesso em: 21 أبريل. 2026.