Perdana SSP, Kusumawati N, Basukiwardojo MMS, Setiarso P, Djalilah GN, Rahmawati K. The Effect of Ultrasonication on the Quality of Keratin Extraction Based on Ionic Liquid from Duck Feather. CST [Internet]. 2025 Dec. 31 [cited 2026 Mar. 17];10(2):267-75. Available from: https://cst.kipmi.or.id/journal/article/view/1785