Fig. 3.

Absorbance measurements of (a) E. coli and (b) S. aureus cell supernatants at 260 nm following 405 nm light exposure (65 mW cm⁻²). An asterisk (*) represents a significant increase in absorbance reading when compared to the equivalent non-exposed control samples (P≤0.05). Each data point is a mean value±sem (n≥3).