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. Author manuscript; available in PMC: 2006 May 2.
Published in final edited form as: Environ Toxicol Chem. 2006 Apr;25(4):973–984. doi: 10.1897/05-334r.1

Table 4.

Acute esterase toxicity to Hyalella aztecaa

96-h mortality (%)
Enzyme concentrationb Liquidc Lyophilizedd
0x 0 ± 0 0 ± 0
100x 0 ± 0 0 ± 0
500x 37 ± 15 0 ± 0
1,000x 35 ± 22 20 ± 20
5,000x 100 ± 0 53 ± 12
a

Data are the average of three replicates with five amphipods ± standard deviation.

b

1x = 2.5 × 10−3 U/ml in laboratory water.

c

Ammonium sulfate suspension esterase preparation (lot 102K7062; Sigma Chemical, St. Louis, MO, USA).

d

Lyophilized esterase preparation (lot 123K7033; Sigma Chemical).