| Popis: |
Assam crude, kerosene, petrol, diesel and furnace oil administered into the culture suspension ofAnabaena doliolum as whole oil or aqueous extract exerted concentration dependent toxic effects. The hierachy of toxicity of the test oils was diesel > furnace oil > petrol > kerosene > crude. The oils rich in aromatics were most toxic and therefore estimation of this fraction might enable prediction of toxicity of an oil. Growth rate was a more sensitive criterion of oil toxicity as compared of final standing crop. In case of crude and kerosene, the whole oil application was more inhibitory than their respective aqueous extracts, whereas reverse trend was obtained in case of other oils. The study recommends toxicological evaluation of whole oils as well as their aqueous extracts for meaningful results. |
