therefore
data for this parameter are not shown. Like motility and gravitaxis,
the effect of detergent on cell compactness (cell shape) was more
pronounced immediately upon exposure giving NOEC and EC50 valuesvalues
of 10.8 and 225 mg L1, respectively. After 6, 24 or 72 h incubation,
NOEC values for cell compactness were 21.6, 630 and
630 mg L1, respectively; however, no EC50 values could be calculated
due to a less pronounced effect and large variation in the response
(Fig. 4a–d).