Ethanol Extraction from Fresh Algae (Gracilaria sp) Using Various Concentrations of Hydrochloric Acid Solution in The Hydrolysis Process. JPLT [Internet]. 2025 Oct. 27 [cited 2026 Sep. 30];13(3):261-9. Available from: https://ejournal.unsrat.ac.id/v3/index.php/jplt/article/view/64852