the diluted plant extract
(100
-
0.07 mg/ml)
was
added to it and maintained at room temperature
for 24 h under cons
tant aeration and light source.
The test was carried out on both control (artificial
sea water), plant extract and potassium
dichromate at a concentration range of
1.95
–
1000
μg/ml (n = 3), and mortality computed as in
Eq 1