March 2010

Toxic stress and hematological effects of nickel on African catfish, Clarias gariepinus, fingerlings

This laboratory study assessed the effects of nickel on the behaviour and some blood parameters of African catfish, Clarias gariepinus, after a 96 h semi static method with a view to determining the safe concentration effect of the metal physiological functions of the fish. The mortality rate increased with increased concentrations of toxicants. The 96 h median lethal concentration (96 h LC50) was 8.87mg...

Author(s): I. A. Ololade and O. Oginni

March 2010

Influence of exposure time on phenol toxicity to refinery wastewater bacteria

  Influence of exposure time on the response of pure cultures of bacteria and microbial community of petroleum refinery wastewater to toxicity of phenol was assessed through TTC-dehydrogenase activity (DHA) inhibition test. At sufficient concentrations, exposure of these bacterial cells to phenol resulted in inhibition of dehydrogenase activity. InPseudomonas sp. RWW2 and Escherichia sp....

Author(s): C. O. Nweke and G. C. Okpokwasili