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. 2019 Jul 11;10:1604. doi: 10.3389/fimmu.2019.01604

Figure 1.

Figure 1

The physiochemical characterization of PGA/Alum. (A) SEM and (B) TEM images of alum and PGA/Alum (inset images are highly magnified). (C) FT-IR spectra of γ-PGA, alum, and PGA/Alum. (D) Cytotoxicity of PGA/Alum was evaluated by measuring cell viability of BMDCs exposed to various concentrations of alum, γ-PGA, and PGA/Alum for 24 h. The data are representative of three independent experiments. Statistically significant differences were analyzed via ANOVA/Bonferroni. ***P < 0.001.