Figure 2
From: Effect of TiO2 nanoparticles in the earthworm reproduction test
Difference in reproductive activity of Eisenia between summer and winter and influence of TiO 2 . All tests were performed according to OECD Test Guideline No. 222 [2] in natural soil. The figure shows some of the results as an example comparing the control vessel (control from the tests with NM-105) with test soils containing 200 mg/kg NM-105 or NM-103. The mean number of offspring per vessel and the standard deviation are presented.