[1]
M. Mahardianti, S. Septha Kharisma, R. Wati, and Y. Affandi, “Biopolymer Gel from Pineapple Peel (Ananas comosus) Waste-Based Gel with Sodium Chloride (NaCl) for Optimizing Electrocardiogram (ECG) Signal Recording”, J. Energy Mater. Instrum. Technol., vol. 7, no. 1, pp. 26–35, Mar. 2026.