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 Optimization of Carbopol 940 and Glycerol Concentration in Antioxidant Gel of Alstonia scholaris L. Leaf extract with Simplex Lattice Design Method.
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Available at: &lt;<a href="https://journal.itera.ac.id/index.php/ijcos/article/view/1610" target="_new">https://journal.itera.ac.id/index.php/ijcos/article/view/1610</a>&gt;. Date accessed: 20 may 2024.