Nurmutaaqimah, Siti Jamilatun, and Aster Rahayu. 2025. “Effect of NaOH Concentration on Surface Width and Pore Volume of Silica Gel From Beef Shrain As Adsorbent”. Sains Natural: Journal of Biology and Chemistry 15 (2):102-9. https://doi.org/10.31938/jsn.v15i2.814.