Suppressive Effect of Quercetin on Nitric Oxide Production from Nasal Epithelial Cells In Vitro

Figure 3

Nitric oxide scavenging activity of quercetin in vitro. The reaction mixture of various concentrations of quercetin, NOR-7, and carboxy-PTIO is prepared in phosphate buffer and incubated at 25°C for 30 minutes. Radical intensity is measured with an ESR spectrometer. The experiments are performed twice with similar results.