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. 2022 Jul 1;13:896706. doi: 10.3389/fphar.2022.896706

FIGURE 8.

FIGURE 8

ATR-FTIR absorption spectra of (a) pigskin treated with the hydrogel containing extract of Ea-EtOH; (b) pigskin treated with the hydrogel containing extract of Ea-iPrOH; (c) pigskin treated with the hydrogel containing extract of Ea-WA; (d) pure pigskin (control sample) (A); ATR-FTIR absorption spectra of (a) the hydrogel containing extract of Ea-EtOH; (b) the hydrogel containing extract of Ea-iPrOH; (c) the hydrogel containing extract of Ea-WA (B). HEa-EtOH—hydrogel containing dry ethanolic extract of E. angustifolium; HEa-iPrOH—hydrogel containing dry isopropanol extract of E. angustifolium; HEa-WA—hydrogel containing dry water extract of E. angustifolium.