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. 2026 Aug 13;13:1927483. doi: 10.3389/fnut.2026.1927483

FIGURE 4.

Bar graph compares the peak area ratio of four aroma compounds—4-ethylphenol, styrene, furfural, and 3-hydroxy-2-butanone—across five concentration levels, 0, 200, 400, 600, and 800 milligrams per liter, indicated by different shades. Letters above bars indicate statistically significant differences.

Effects of isoamyl alcohol on the volatility of minor characteristic typical odorants in navel orange brandy. Different lowercase letters denote significant differences via Duncan’s multiple range test (p < 0.05).