MAHARDIANTI, M.; SEPTHA KHARISMA, S.; WATI, R.; AFFANDI, Y. Biopolymer Gel from Pineapple Peel (Ananas comosus) Waste-Based Gel with Sodium Chloride (NaCl) for Optimizing Electrocardiogram (ECG) Signal Recording. Journal of Energy, Material, and Instrumentation Technology, [S. l.], v. 7, n. 1, p. 26–35, 2026. DOI: 10.23960/jemit.386. Disponível em: https://jemit.fmipa.unila.ac.id/index.php/jurnal/article/view/386. Acesso em: 8 jul. 2026.