Nickel in Soil Modifies Sensitivity to Diazinon Measured by the Activity of Acetylcholinesterase, Catalase, and Glutathione S-Transferase in Earthworm Eisenia fetida

Table 1

Nickel concentration (mg*kg⁻¹ of the dry sample) in soil and Eisenia fetida exposed to nickel. Bioaccumulation factor (BAF) was calculated from the obtained experimental values. Ni concentration in control conditions (K) was below the threshold of determination (btd).

Experimental group	Gastrointestinal tract	Body wall	Whole body	Soil
	Mean ± SD (𝑛)	Mean ± SD (𝑛)	Mean ± SD (𝑛)	Mean ± SD (𝑛)
K	btd (6)	btd (13)	btd (16)	btd (4)
Ni300	3,07 ± 0,78 (9); BAF = 0,012	0,66 ± 0,14 (12); BAF = 0,002	3,27 ± 0,12 (11); BAF = 0,012	265,38 ± 10,78 (4)
Ni900	14,95 ± 2,02* (9); BAF = 0,017	2,48 ± 0,39* (12); BAF = 0,003	5,12 ± 0,48 (12); BAF = 0,006	857,57 ± 10,18 (4)

Abbreviations are explained in Section 2. Asterisk *indicates the statistically significant differences between Ni300 and Ni900 groups in the analysed organs.