Open AccessDie effek van heksavalente chroom by 'n variërende water-pH op die koolhidraatmetabolisme van <i>Tilapia sparrmanii<i/> (Cichlidae)
Author(s) -
Victor Wepener,
J. H. J. van Vuuren,
H.H. Du Preez
Publication year - 1992
Publication title -
suid-afrikaanse tydskrif vir natuurwetenskap en tegnologie/die suid-afrikaanse tydskrif vir natuurwetenskap en tegnologie
Language(s) - English
Resource type - Journals
eISSN - 2222-4173
pISSN - 0254-3486
DOI - 10.4102/satnt.v11i3.539
Subject(s) - lactate dehydrogenase , zoology , isocitrate dehydrogenase , biology , hexavalent chromium , chemistry , biochemistry , chromium , enzyme , organic chemistry
The effect of hexavalent chromium at different pH values on the carbohydrate metabolism of Tilapia sparrmanii was investigated. The indicator organisms were exposed to Cr(V1) for short and long-term exposures, after which the blood glucose levels and activities of pyruvate kinase, isocitrate dehydrogenase and glucose-6-phosphate dehydrogenase were determined. It was found that short-term exposures of Cr(V1) at an acidic medium caused an increase in energy production and glucose concentrations. Long term exposures led to exhaustion of carbohydrate reserves, which necessitated the formation of additional energy compounds