Figure 3.
The stability of the silver nanomaterials in gastric acid. (A) The colors of silver nanoparticles (AgNPs) and AgNP/nanoscale silicate platelet (NSP) in water (mock) or in simulated chicken gastric juice at 30 minutes post-treatment are shown. The arrow indicates the precipitated colloidal AgNPs. (B) Approximately 5 × 106 Salmonella synchronized at the log phase of the growth curve were cultured in Luria-Bertani (LB) broth with 0.01 wt% nanomaterials. At the indicated times, aliquots of the mixtures were spread on to LB agar, and the surviving cells were estimated by counting the number of resulting colonies.
Notes: The gastric acid-treated AgNPs and AgNP/NSP were labeled AgNP-A and AgNP/NSP-A, respectively. *P < 0.01 (AgNP-A vs AgNP, one-way analysis of variance).