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Table 1 EC 10 and EC 50 values for silver nanomaterials and AgNO 3 on day 28

From: The potential benefits and limitations of different test procedures to determine the effects of Ag nanomaterials and AgNO3 on microbial nitrogen transformation in soil

  Experiment 1 Experiment 2
Test parameters EC10a[mg/kg] EC50a[mg/kg] EC50a[mg/kg]
NM-300K b    
Nitrate accumulation, lucerne --- >15 >15
Nitrate accumulation, (NH4)2SO4 0.9 [0.2 to 1.6] 7.3 [5.1 to 11.5] 6.5 [0.3 to 63.5]
Potential ammonium oxidation 0.5 [0.0 to 1.0] 1.6 [0.5 to 4.8] 3.7 [2.1 to 8.3]
Substrate-induced respiration 1.0 [n.d.] 5.0 [n.d.] 13 [n.d.]
NM-302 c    
Nitrate accumulation, lucerne --- >100 >100
Nitrate accumulation, (NH4)2SO4 5.6 [4.7 to 6.6] 44.6 [41.2 to 48.5] Not determined
Potential ammonium oxidation 0.5 [n.d.] 6.0 [n.d.] 17.1 [14.3 to 20.6]
Substrate-induced respiration 2.1 [n.d.] 67.5 [n.d.] 74.7 [42.8 to 174.8]
AgNO 3 b    
Nitrate accumulation, lucerne --- >15 Not determined
Nitrate accumulation, (NH4)2SO4 0.7 [0.50 to 0.8] 2.8 [2.6 to 3.1] Not determined
Potential ammonium oxidation 1.4 [1.2 to 1.6] 2.9 [2.7 to 3.2] 2.4 [n.d.]
Substrate-induced respiration --- >15 >15
  1. aConfidence interval shown in square brackets; bfive test concentrations; spacing factor of 3; cscreening approach: three test concentrations; spacing factor of 10; n.d., not determinable.