. Author manuscript; available in PMC: 2012 Nov 1.

Published in final edited form as: Arch Environ Contam Toxicol. 2011 Mar 31;61(4):547–557. doi: 10.1007/s00244-011-9663-1

Table 3.

AQ and IQ quotients for EC₅₀ and slope for each combination tested in Microtox as classified by the sham, SN2 TDT-level, or SN2:NPN mixture groups

Mixture group^a	EC₅₀-AQ			Slope-AQ			EC₅₀-IQ			Slope-IQ
A:B	15 min	30 min	45 min	15 min	30 min	45 min	15 min	30 min	45 min	15 min	30 min	45 min
Sham
EIAC:EIAC	1.00	0.93	0.90	0.94	0.93	1.02	1.04	1.07	1.15	0.69	0.78	0.92
EBAC:EBAC	1.02	1.05	1.00	0.91	1.02	1.01	1.14	1.31	1.42	0.72	0.89	0.97
ECAC:ECAC	1.01	1.01	0.98	0.90	0.91	0.92	1.29	1.30	1.32	0.70	0.70	0.71
EFAC:EFAC	0.94	1.00	1.02	0.70	0.86	1.01	1.31	1.46	1.56	0.61	0.72	0.83
3M2B:3M2B	0.97	0.98	1.02	1.09	0.95	0.97	1.18	1.22	1.26	0.77	0.70	0.71
Full:full
EIAC:EBAC	1.02	1.01	1.00	0.92	0.94	0.93	1.10	1.22	1.34	0.70	0.84	0.95
Full:high
EIAC:ECAC	1.02	1.07	1.07	1.14	0.90	0.91	1.17	1.32	1.41	0.82	0.69	0.74
EBAC:ECAC	1.07	1.09	1.08	0.84	0.85	0.86	1.26	1.37	1.49	0.64	0.65	0.70
Full:low
EIAC:EFAC	1.12	1.26	1.54	0.81	0.76	0.92	1.42	1.80	2.28	0.64	0.64	0.76
EBAC:EFAC	0.86	0.95	1.13	0.70	0.65	0.84	1.06	1.35	1.77	0.58	0.53	0.54
High:low
ECAC:EFAC	0.82	0.83	0.84	0.69	0.64	0.59	1.06	1.20	1.32	0.57	0.51	0.49
SN2:NPN
EIAC:3M2B	0.90	0.89	0.86	1.09	0.91	0.81	0.97	1.04	1.03	0.77	0.68	0.63
EBAC:3M2B	0.91	0.86	0.87	1.14	0.97	0.87	0.98	1.02	1.08	0.83	0.71	0.65
ECAC:3M2B	0.79	0.78	0.77	0.97	0.95	0.89	0.97	0.96	0.99	0.76	0.71	0.68
EFAC:3M2B	0.87	0.86	0.88	0.81	0.64	0.55	1.07	1.12	1.18	0.57	0.48	0.40

Mixture group includes sham, SN2 agent TDT level (full, high, low TDT [see Table 2]), and SN2:NPN (nonpolar narcotic) categories, see Table 1 for chemical names. Values shown in bold are within the range of 0.90 to 1.10 and are consistent with dose-addition if AQ values or independence if IQ values