Figure 4

Absorption spectra of solutions with different concentrations of Ag⁺ (1 mM, 10 mM, 20 mM and 40 mM) ; water and broth of yeasts as control group, this reaction happens in a conical flask wrapped with tinfoil at 28 °C for 4 d [(a) solutions are treated with HX-YS; (b) solutions are treated with LPP-12].