Table 4 Dose-response relationship of CH4 production to bromoform, dibromo- and bromo- methane additions in rumen fluid. The parameters are derived from log-logistic, 4 parameter dose-response curves of cumulative CH4 production over 240 min vs. the initial concentration of added inhibitor. Parameter ec-50 represents the effective concentration of the inhibitor resulting in 50 % inhibition of CH4 production. The response to each compound was determined on separate days in incubations of the same batch of rumen fluid. The data from which these parameters were derived and the corresponding curves are shown in Figure 3. Uncertainty of the parameters is represented by standard error.

From: The antimethanogenic efficacy and fate of bromoform and its transformation products in rumen fluid

Parameter

bromoform

dibromomethane

bromomethane

coefficient b

5.98 ± 0.76

7.46 ± 0.92

3.09 ± 0.24

minimum value (µmol)

98 ± 16

146 ± 8

182 ± 7

maximum value (µmol)

681 ± 14

763 ± 16

616 ± 6

ec-50 (µmol l-1)

1.37 ± 0.03

1.36 ± 0.03

5.34 ± 0.14