The current paper determines heavy metals in sediments of six freshwater wetlands of greater Dhaka district from November 1999 to September 2000. The sampling took place in summer, rainy season, and winter, wherein for each season five soil samples were collected from the wetland at a depth of 0 – 15 cm. To assess the status of heavy metal pollution in the sediments, geo-accumulation factor (Ig...

The current paper determines heavy metals in sediments of six freshwater wetlands of greater Dhaka district from November 1999 to September 2000. The sampling took place in summer, rainy season, and winter, wherein for each season five soil samples were collected from the wetland at a depth of 0 – 15 cm. To assess the status of heavy metal pollution in the sediments, geo-accumulation factor (Ig...

Bioaccumulation of six heavy metals (Mn, Fe, Co, Ni, Cu, Zn) in the muscle of highly consumed fish species (Mastacembelus armatus) were measured using atomic absorption spectrometer. Fe (213.29 mg/kg dry weight) concentration was the most, followed by Zn (186.19 mg/kg dry weight), Ni (58.98 mg/kg dry weight), Cu (41.36 mg/kg dry weight), Co (9.06 mg/kg dry weight) and Mn (9.03 mg/kg dry weight)...

The aim of this study was to investigate the role of nitric oxide (NO), a second messenger and/or a neurotransmitter, in convulsions induced by nicotine. We examined the effects of 7-nitroindazole (7-NI), a selective neuronal nitric oxide synthase (NOS) inhibitor, N-nitro-L-arginine (NNA), a non -selective NOS inhibitor, and aminoguanidine, a selective inducible NOS inhibitor, on convulsions in...

as a result of human activities, metal pollution has become one of the most serious environmental problems today. phytoremediation utilizes plants to uptake contaminants and can potentially be used to remediate metal-contaminated sites. a pot experiment was conducted to compare the phytoextraction and phytostabilization potential of two plant species (populus alba and morus alba) for some eleme...

The major objective of this investigation was to evaluate the potential of scented geraniums, Pelargonium roseum, to uptake and accumulate heavy metals nickel (Ni), cadmium (Cd), or lead (Pb). For this, plants were grown in an artificial soil system and exposed to a range of metal concentrations over a 14-day treatment period. Then, metals from the entire biomass were extracted. The results sho...

There are no reports on the effect of 7-nitroindazole (7-NI) on chemically-induced convulsions. Hence, in the present study, its (100 and 200 mg/kg) action was tested alone and in combination with phenobarbitone (20 mg/kg) and diazepam (0.25 mg/kg) on picrotoxin (PCT)-induced convulsions in rats. The changes produced by 7-NI on nitric oxide synthase (NOS) activity and nitric oxide (NO) concentr...