Background: Based on the increase in antibiotic-resistant pathogens, it is necessary to have various effective compounds, so as to prevent the proliferation of these pathogens. For this purpose, nano-materials such as bismuth oxide nanoparticles can be used.Objectives: The aim of this study was to produce bismuth oxide nanoparticles by Bacillus lichenifor...

Recent literature on multiple sclerosis is extensive yet our ignorance as to aetiology remains total. Toxic, infective or allergic causes, heavy metal metabolism, swayback disease of sheep, high social class, primitive sewage disposal, a temperate climate, Scandi-navian ancestry, these and many other factors have been suspected, investigated, discussed. Inevitably there have also been surveys o...

The aim of this study was to review the prevalence of rice contamination to heavy metals in Iranian grown and imported rice brands by conducting a systematic review and assess the related human health risk. Multiple keywords such as "rice, heavy metals, and Iran" were used to search in related databases. The average concentration of Cd, Pb, As, Cu, Zn, Cr, Ni and Co for Iranian grown/imported r...

A suite of 36 surface sediment samples, taken between 10 and 100 m water depth in Mejillones Bay (Northern Chile), were analyzed for mineralogy, grain size, total organic carbon, Al, and heavy metal content (Cd, Zn, Ni, Mn, V, Mo). Quartz and feldspars were the main lithogenic minerals and carbonate the predominant biogenic mineral. Sediments were fine sands in the shallow zone and organic silt...

Metals and metallic alloys are unavoidable materials in everyday dental use for the making of fillings, cast cores and post systems, individual crowns, implantants’ suprastructures, dentures and orthodontic devices. They still belong to the vital materials in dentistry. Applied alloys in a mouth are exposed to the influence of chemical, biological, mechanical, thermal and electrical forces whic...

A metal resistant bacterial strain, Bacillus cereus JP12, could use decabromodiphenyl ether (BDE-209) as the sole carbon and energy source for growth in mineral salt medium. Under the conditions of pH 6.0, 30°C, 150 rpm and an inoculum of OD600=0.6, more than 88% of the initial BDE-209 (1mg/L) was degraded after 12 days. The addition of appropriate surfactants and additional carbon sources coul...