TABLE 3.
Multiple linear regression model parametersa
| Treatment | m1 | m2 | m3 | b | r2 |
|---|---|---|---|---|---|
| Live cells | 10.47 (4.67)A | 0.0020 (0.0007)B | 0.843 (0.020)B | −20.46 (12.53)D | 0.989 |
| Killed cells | 15.56 (4.95)A | 0.0110 (0.0032)A | 0.577 (0.097)A | −49.15 (14.47)A | 0.919 |
| No cells | 15.30 (6.82)B | 0.0026 (0.0013)C | 0.700 (0.047)A | −11.91 (11.22)D | 0.916 |
a
The Fe(II) oxidation rate (r) [micromolar Fe(II) oxidized per hour] is calculated as follows: r = m1 × [O2] + m2 × [Fe]total + m3 × [Fe(II) addition rate] + b, where the units for [O2] are the percentage of air saturation, the units for [Fe]total are micromolar, and the units for Fe(II) addition rate are micromolar per hour. The values in parentheses are standard deviations. Also shown is the regression coefficient for each model (r2). The letters after the values indicate the significance of each term to the regression model, as follows: A, P < 0.001; B, P < 0.01; C, P < 0.05; D, not significant.