Figure 4.

Qualitative evaluation of the GS3 phyto-courier and free Q solution. Antioxidant capacity determined by the FRAP assay. The antioxidant capacity is expressed as µmol of Fe²⁺ equivalents (equivalents, eq) per mL of solution. A t-test was performed to determine the significance with p-value < 0.05 (a). UV spectra of the quercetin extracted from the phyto-courier (b) and of the free Q solution (c). Displayed absorption values were reduced by absorption values of the solubilisation buffer alone (hypromellose/Pluronic L-61 and PBS buffer 1:1 v/v).