Levels of selected metals Na, Ca, Mg, K, Fe, Mn, Cr, Co, Ni, Cd, Pb and Mn were estimated by flame atomic absorption spectrophotometry in groundwater samples from Kasur, a significant industrial city of Pakistan. Salient mean concentration levels were recorded for: Na (211 mg/l), Ca (187 mg/l), Mg (122 mg/l), K (87.7 mg/l), Fe (2.57 mg/l) and Cr (2.12 mg/l). Overall, the decreasing metal concen...

The influences of eight metal ions (i.e., Na+, Ca2+, Ag+, Co2+, Cu2+, Al3+, Zn2+, and Mn4+) on mycelia growth and palmarumycins C(12) and C(13) production in liquid culture of the endophytic fungus Berkleasmium sp. Dzf12 were investigated. Three metal ions, Ca2+, Cu2+ and Al3+ were exhibited as the most effective to enhance mycelia growth and palmarumycin production. When calcium ion (Ca2+) was...

Urban rivers having different catchment areas and properties are investigated in order to infer their heavy metal contribution to the Izmir Inner Bay. The concentrations of Cd, Cr, Cu, Ni, Pb, and Zn in the waters and sediments of these rivers were measured and compared with the limit values given in the Sediment Quality Guidelines and Screening Quick Reference Tables (SQuiRTs). Metal concentra...

Heavy metal(loid) contamination in the environment of mining areas has become an important problem. Cheshemeh-Konan is one of the main copper deposits in NW Iran that is currently abandoned. In the present work, the intensity of some metal(loid) pollutions in the soil of the mining area was assessed using three reliable indices. In addition, the potential of Sonchus oleraceus L., as th...

the present study has been undertaken in a laboratory scale to characterize and investigate pollution potential of textile effluents from depz area in dhaka, bangladesh. collected effluent samples from five different industries were analyzed for physico-chemical parameters using field kits and standard methods, and for metals using flame atomic absorption spectrophotometer (faas). the average p...

dry and wet atmospheric depositions as well as urban surface soil samples were collected in eight different land use zones (during 2010) of the most important and largest industrial city, southwest iran for determining cadmium, chromium, lead and zinc. the average of cd, cr, pb and zn concentrations in the study area for wet precipitation were 17.8 μg/l, 49.97 μg/l, 2.31 μg/l, and 0.53 μg/l, re...

Metal ion interactions with phosphoenolpyruvate carboxylase from the CAM plant Crassula argentea and the C(4) plant Zea mays were kinetically analyzed. Fe(2+) and Cd(2+) were found to be active metal cofactors along with the previously known active metals Mg(2+), Mn(2+), and Co(2+). In studies with the Crassula enzyme, Mg(2+) yielded the highest V(max) value but also generated the highest value...

Ribonuclease H (RNase H) selectively degrades the RNA strand of RNA.DNA hybrids in a divalent cation-dependent manner. Previous structural studies revealed a single Mg(2+) ion-binding site in Escherichia coli RNase HI. In the crystal structure of the related RNase H domain of human immunodeficiency virus reverse transcriptase, however, two Mn(2+) ions were observed suggesting a different mode o...

this paper investigates host condition factor, parasite interaction and metal accumulation in tilapia guineesis and host-parasite system in iddo area of lagos lagoon, nigeria. eighty specimens of t. guineensis from the lagoon were caught and dissected for intestinal helminth parasites. condition factors of all individuals were determined. median condition (k<2.62 and k>2.62) were used in groupi...