تلخیص
A flagellate protozoan was isolated from tanneries' effluent collected from the vicinity of city Kasur. Axenic culture of the protozoans was established in 0.1% aqueous solution of molasses supplemented with antibiotic ehloramphenicol. The medium supported a healthy growth of the microorganisms both in terms of number as well as size. however, these parameters decreased after one week and few days. respectively. Following Cr' exposure it was found that up to 4 i.t.g of- the metal ml of the medium, the protozoans showed, but a significantly decreased growth throughout the study period. In case of higher concentrations; 6. 8 and 10 1.ig of Cr'''/inl the protozoans showed a further delay of' one-day in the manifestation of growth. Following 9. 7 and 6 days of incubation the protozoans were not observed in case of the culture media containing. 6, 8 and 10 tg of Cr.6;m1. respectively. Cultures of the flagellates exposed to chromium were found invariably devoid of dividing cells. throughout the observation period. The flagellates were timnd to reduce Cr'6. up to a level of 6 !.ig'ml of the medium. Beyond this level the protozoans remained unsuccessful to reduce the metal.
JAVED I. QAZI , UZMA ASHRAF. (2000.) BIOTECHNOLOGICAL IMPLICATION OF FLAGELLATE PROTOZOANS IN CLEANING INDUSTRIAL EFFLUENTS CONTAINING HEAVY METAL Cr+6 , Punjab University Journal of Zoology, Volume 15, Issue .
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