Figure 2.

Difference in reproductive activity of Eisenia between summer and winter and influence of TiO2. 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.

Schlich et al. Environmental Sciences Europe 2012 24:5   doi:10.1186/2190-4715-24-5
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