Recently, we reported the production of Cadmium sulfide (CdS) fluorescent semiconductor nanoparticles (quantum dots, QDs) by acidophilic bacteria of the Acidithiobacillus genus. Here, we report that the addition of inorganic phosphate to Acidithiobacillus thiooxidans ATCC 19703 cultures favors the biosynthesis of CdS QDs at acidic conditions (pH 3.5). The effect of pH, phosphate and cadmium con...

toxicity of which on biological wastewater processes, humans, and the environment has been proven in various studies. in this study, the half maximal effective concentration (ec 50 ) of growth inhibition of cadmium, lead, and mercury was assessed on dominant bacterial species present in sequencing batch reactors (sbr). methods: biomass sample was obtained from the biological unit of the sbr est...

Cadmium is an essential element for plant growth and development. Its accumulation in soil more hazardous to human animal health than plants microorganisms. A pot greenhouse experiment was conducted determine the usability of Sinapis alba L. Avena sativa phytoremediation contaminated with cadmium verify cellulose viability remediation under pressure doses from 4 16 mg Cd2+ kg−1 d.m. (dry matter...

toxic heavy metals, such as lead (pb) and cadmium (cd) are widely used in industry and their accumulation in the living tissues may cause serious health problems and ecological hazards. twenty four moderately halophilic bacteria isolated from saline environments of iran were used to study their ability to bioremediation of lead and cadmium. amongst them, a gram-negative rod shaped bacterium, de...

The aim of the study was to evaluate the effect of cadmium exposure on Staphylococcus epidermidis (ATCC 35984) biofilm formation. Bacteria were cultured in the absence or presence of different concentrations (0-50 µM) of cadmium. Biofilm formation and bacterial viability were assessed. Quantitative Real Time-PCR (qRT-PCR) was used to determine the mRNA expression of molecular markers of S. epid...

In Escherichia coli, heterologous production of Schizosaccharomyces pombe phytochelatin synthase (PCS) along with overproduction of E. coli serine acetyltransferase (SAT) and gamma-glutamylcysteine synthase (gammaECS) was achieved and resulted in the accumulation of phytochelatins in bacterial cells. Overproduction of either gammaECS alone or simultaneous production of all three proteins in bac...

The chosen phosphobacterial species are well tolerated to the wide range of salinity (20-40 ppt) and found to be pure marine forms. Effect of different concentrations of cadmium on the growth, phosphate solubilising activity and content of extracellular macromolecules in eight species of phosphate solubilising bacteria were carried-out in the present study at optimum level of salinity and found...

Water and sediments of the Seine estuary are contaminated by chemicals, especially cadmium, which favors survival and growth of cadmium-resistant bacteria. We investigated the diversity of the cadA gene, which encodes a Cd(2+)/ATPase protein transporter, in the microbial community of the Seine estuary. The cadA gene first isolated from S. aureus (pI258) was prevalent, with a conservation better...