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. 2023 Jan 5;9:1087453. doi: 10.3389/fnut.2022.1087453

FIGURE 1.

FIGURE 1

Residual sulfur dioxide content after processing of Gastrodia elata (A), Effect of steaming and sulfur fumigation on the pH of G. elata powder (B). NSt-NSf, nonsteam and nonsulfur fumigation treatment; NSt-Sf, nonsteam and sulfur fumigation treatment; St-NSf, steam and nonsulfur fumigation treatment; St-Sf, steam and sulfur fumigation treatment.