(a)
(b)
Figure 1: Bioavailability of nAg of different coatings in the digestive gland and gills of freshwater mussels. Mussels were exposed to 4 coatings of nAg for 96 h at 15°C. After the exposure period, mussels were placed overnight to allow depuration (elimination of nonadsorbed materials) from gills, digestive system, and shells. Total Ag was determined in the digestive gland (a) and gills (b). indicates significance from controls.