Dear Editor I read with great interest the article by Heydarian et al [1]. The authors had conducted a clinical trial and found that zinc supplementation did not benefit clinical manifestations of acute bronchiolitis. The study is well described, but there are few points that need comment. The authors described that bottles of drug and placebo were similar in size and shape. However, it is well...

A modified zinc sulfate flotation technique using Formalinized fecal specimens (F-ZnSO4) was compared to the Formalin-ether (FE) concentration method for the laboratory diagnosis of intestinal parasites. Many laboratories have difficulty storing, using, and disposing of either and need a procedure for concentrating fecal specimens which does not require ether. Comparative data were obtained for...

Novel and environmentally benign adsorbents were prepared via a simple sulfuric acid treatment process using the wastes of astringent persimmon, a type of biomass waste, along with persimmon tannin extract which is currently employed for the tanning of leather and as natural dyes and paints. The effectiveness of these new biosorbents was exemplified with regards to hydrometallurgical and enviro...

Thermodynamic reversibility of ion binding at a membrane/aqueous interface has been demonstrated using variable period X-ray standing waves generated above a gold mirror. The interface consists of a negatively charged and polymerized phospholipid monolayer bathed in a dilute zinc chloride solution. Zinc ion distribution in the diffuse double layer was monitored as the pH of the aqueous medium w...

steelmaking slag of mobarakeh steel company (msc) has a high iron content which makes it unsuitable for conventional slag recovery; as in cement industries. on the other hand, eaf slag in this company is almost free of zinc because of using more than 90 percent dri in the charge. therefore, removal or recovery of iron from the slag can be a suitable solution to slag recovery in this company. in...