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. 2015 Dec 22;2015:891539. doi: 10.1155/2015/891539

Figure 2.

Figure 2

Effects of sodium hydroxide's concentration and time on the yields of (a) hydroxybenzoic acid, (b) p-hydroxybenzaldehyde, (c) vanillic acid, (d) vanillin, (e) syringic acid, (f) syringaldehyde, (g) p-coumaric acid, and (h) ferulic acid during oxygen oxidation at 100°C.