fig2
![Simple detection of polystyrene nanoparticles and effects in freshwater mussels: method development and <i>in situ</i> application to urban pollution](https://image.oaes.cc/52141469-fcb3-414a-b101-a38f68614519/wecn2060.fig.2.jpg)
Figure 2. Refractive indexes and TRR following in vitro exposure to plastic nanoparticles (A and B) or in E. complanata digestive gland extracts following in situ exposures (C and D). The RI (A) and the TRR (B) were determined in concentrated albumin solutions. Mussels were encaged for 3 months at various sites and dissected, and digestive glands homogenates were assessed for RI and TRR. OVF: Overflow site; PsNP: polystyrene nanoplastic; RI: refractive index; TRR: thiol-reaction rates.