the contamination of riverbed sediments by heavy metals has assumedserious problems due to their toxicity and accumulative behavior. the present studyinvestigated the concentrations of heavy metals from the bottom sediments of shitalakhyariver to understand the level of contamination and their distribution. the averageconcentrations of heavy metals al, k, ca, mg, fe, as, cu, co, cr, and zn are ...

We present evidence demonstrating the capability of Phaeocystis antarctica colonies to substitute cobalt (Co) and zinc (Zn) as micronutrients, in which Co limitation is alleviated by additions of Zn and vice versa. Maximal growth rates and biomass were determined by fluorescence and the values obtained under replete Zn and no added Co conditions were significantly higher than under replete Co a...

Zinc (Zn), aluminium (Al), mercury (Hg), methylmercury (MeHg) and lead (Pb) extracellulary applied reduce voltage-activated calcium channel currents (VACCCs); Pb and Al also reduce N-methyl-D-aspartate (NMDA)-activated channel currents (NACCs). Pb is most effective in reducing VACCCs, with an IC50 of 0.46 microM, followed by Hg (IC50 = 1.1 microM) and MeHg (IC50 = 2.6 microM). Zn and Al were le...

In this study, the Zn/Al-TiO2 and Zn/Al-ZnO was successfully synthesized. The catalysts were characterized by X-ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), Scanning Electron Microscope—Energy Dispersive Spectroscopy (SEM-EDS). typical diffraction peaks of Zn/Al-LDH, TiO2, ZnO still appear in composites, indicating that composite preparation did not change form precursors. FTIR sp...

Introduction Zn-containing electric arc furnace dust (EAFD), a solid waste produced during steelmaking process, contains many valuable metals, such as Fe, Zn, Mn, Ca, etc. (Kukurugya et al., 2015; Wang et al., 2016b). And the dust is classified as hazardous wastes according to the US Environmental Protection Agency because of the presence of Cr, Pb, etc. (Ann M. Hagni et al., 1991; Wang et al.,...

Structural and magnetic properties of a series of low doped Zn 1−x Co x O thin films deposited from Zn and Co metal targets on (0001) Al 2 O 3 substrates. Abstract We report on the synthesis of low doping Zn 1−x Co x O (0 < x < 0.1) thin films on (0001)-Al 2 O 3 substrates. The films were prepared in an oxidizing atmosphere, using the pulsed laser deposition technique starting from Zn and Co me...

SOD (superoxide:superoxide oxidoreductase; EC 1.15.1.1) is considered a crucial component in biological defense against oxidative stress (Bowler et al., 1992). In higher plants, there are three known forms of the enzyme: Cu/Zn-, Mn-, and Fe-SODs. These SOD activities are typically associated with specific subcellular locations such as mitochondria (Mn-SOD), plastids (Cu/Zn-SOD and/or FeSOD), an...

Heavy metals in outdoor and indoor airborne particulate matter (PM) and dust in different residential built environmentsat two rural and one urban site in Pakistan were analysed. An eight stage non-viable impactor (Thermo Fisher Scientific Inc., USA) loaded with EMP 2000 glass microfiber filter papers (Whatman, England) was used to collect airborne PM.The indoordust samples (settled dust) were ...