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. 2011 Jul 7;12(3):917. doi: 10.1208/s12249-011-9659-1

Fig. 2.

Fig. 2

Plots of k obs for photolysis of ascorbic acid in creams (1–9) against carbon chain length of the emulsifier. Stearic acid (black circle); palmitic acid (black square); myristic acid (black triangle). Humectant used: glycerin (1–3); propylene glycol (4–6); ethylene glycol (7–9)