Changes in selected biomarkers in freshwater teleost fish, Cyprinus carpio var. communis exposed to sublethal concentrations of chromium sulphate toxicity.

The toxicity of chromium sulphate on plasma electrolytes (Na+, K+, Cl-) level and Na+, K(+)-ATPase activity of an economically important fish, Cyprinus carpio var. communis was evaluated. During sublethal treatment, plasma sodium level was increased, whereas plasma chloride level decreased throughout the experimental period. Plasma potassium level increased upto 10th day and then declined in the rest of the study period. The Na+, K(+)-ATPase activity decreased upto 15th day of treatment and slowly recovered showing significant increase upto 25th day of treatment. The significant changes in the plasma electrolytes levels and Na+, K(+)-ATPase activity can serve as a valuable biomarker of pollutant exposure and effects.

Effect of manganese toxicity on pigment content, Hill activity and photosynthetic rate of Vigna radiata L. Wilczek seedlings.

Effect of different concentrations, viz. 10(-4) M, 5 x 10(-4) M, 10(-3) M and 5 x 10(-3) M of manganese sulphate (MnSO4, 7H2O) on chlorophyll, carotenoid pigment content and photosynthesis of mungbean seedlings was examined Progressive increase in manganese sulphate concentration upto 5 x 10(-3) M brought about a progressive decrease in total chlorophyll and chl a content. Chl b content changed very little by excess manganese treatment. Total carotenoid pigment content decreased considerably in comparison to control with every concentration of manganese sulphate tried here. Hill activity of chloroplasts isolated from leaves of mungbean seedling and rate of photosynthesis in terms of CO2 uptake showed progressive reduction along with the increase in concentration of the manganese.

Intoxicación por sulfato de cobre administrado por vía rectal / Copper sulphate intoxication due to rectal administration

El presente trbajo expone el caso de una intoxicación por sulfato de cobre (CuSO4) en un niño que recibió el tóxico en una enema evacuante cuyo objeto era desparasitarlo. El cuadro se inició con edema palpebral que pronto progresó a facial y generalizado, palidez, hematuria y oliguria. Ya hospitalizado se comprobó: hipertensión arterial, hemoglobina 2.3g/dL, urea 300mg/dL, creatinina 5 mg/dL, aspartato aminotransferasa 92 U/L, alanina aminotransferasa 50 U/L, análisis urinario con pH de 6, proteínas, glucosa y hemoglobina positivas. En el Departamento de Pediatría del Centro Médico Nacional "Adolfo Ruiz Cortines" se le diagnosticó probable nefritis tubulointersticial tóxica. posteriormente se añadieron los diagnósticos de hepatopatía tóxica y anemia hemolítica. El niño mejoró y se dio de alta dos semanas después de su ingreso

Comparative toxicity of trivalent and hexavalent chromium compounds in fig moth Ephestia cautella (Walker).

Of the trivalent (CrSO4) and hexavalent (K2Cr2O7) chromium compounds, only the hexavalent produced significant deleterious effects on development and fertility of E. cautella, when eggs were reared on laboratory medium supplemented with different concentrations of these salts.

Effect of copper sulphate and bayluscide on fresh water snails of Sharkia governorate

In this study, the effect of two molluscicides [copper sulphate and bayluscide], was tested against fresh water snails Bulinus truncus, Lymnaea cailliaudi, Biomphalaria alexandrina, Physa acute, Melania tuberculate, Cleoptra sp., Viviparus unicolor, Lanistes bolteni at different localities in Sharqia Governorate. The lethal effect of both molluscicides increased with increasing its concentration. Bayluscide was more efficient and the non operculated snails were more susceptible