Figure 4From: The potential benefits and limitations of different test procedures to determine the effects of Ag nanomaterials and AgNO3 on microbial nitrogen transformation in soilEffect of silver nanomaterials and AgNO 3 on glucose-induced respiration according to OECD TG 217 [[3]]. Left figure column: mean activity and standard deviation. Right figure column: percentual deviation. Asterisks indicate a statistically significant difference to controls (p ≤ 0.05).Back to article page