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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 1.

Acute esterase toxicity to Ceriodaphnia dubiaa

48-h mortality (%)
Enzyme concentrationb Liquidc Lyophilizedd BSAe
0x 0 ± 0 0 ± 0 0 ± 0
1x 0 ± 0 0 ± 0 0 ± 0
5x 0 ± 0 0 ± 0 0 ± 0
10x 5 ± 5 0 ± 0 0 ± 0
100x 10 ± 12 0 ± 0 0 ± 0
500x 100 ± 0 0 ± 0 0 ± 0
1,000x 100 ± 0 10 ± 12 0 ± 0
a

Data are the average of four replicates with five neonates ± standard deviation.

b

lx = 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 039H7005; Sigma Chemical).

e

BSA = bovine serum albumin.