introduction: iron deficiency anemia is an important limiting factor for the number of donations in regular donors. limited data is available on the iron status in iranian donors. this study was conduced to evaluate the prevalence of iron deficiency and its related factors in blood donors at shiraz blood transfusion centre in 2005. methods: this descriptive study was done on all blood donors wh...

Background: Human T-cell lymphotropic viruses 1 (HTLV1) is endemic in specific regions. We aimed to determine the prevalence of HTLV I infection among blood donors in southeast Iran.   Methods: This cross-sectional study was conducted between April 2005 and March 2015. Sera were collected from blood donors and were tested for the presence of HTLV1 specific antibody using ELISA. Reactive sample...

BACKGROUND Cisplatin (CP) as a potential drug for solid tumors produces nephrotoxicity and disturbs endothelial function. CP induced nephrotoxicity may be gender related. Nitric oxide plays a pivotal role in endothelial function and L-arginine as endogenous NO donor promotes endothelial function. The role of L-arginine in CP induced nephrotoxicity model and its gender related was investigated i...

Special binding sites in graphene are beneficial for near-surface interaction. These sites, which supplied by single-atom catalysts, change the electronic characteristics of and its derivatives, greatly expanding potential use as gas sensors. Iron–nitrogen–carbon is reflected one most effective substitutes platinum oxygen reduction reactions. The selection carbon-enclosed FeN4 moieties, serve c...

Anoxygenic photosynthesis evolved prior to oxygenic photosynthesis and harnessed energy from sunlight to support biomass production on the early Earth. Models that consider the availability of electron donors predict that anoxygenic photosynthesis using Fe(II), known as photoferrotrophy, would have supported most global primary production before the proliferation of oxygenic phototrophs at appr...

Thioamides and selenoamides are better hydrogen-bond donors than carboxamides because their amino groups more positively charged. Quantum chemical analyses reveal that this counterintuitive phenomenon, which cannot be explained by the electronegativity, originates from larger electronic density flow nitrogen lone pair of NH2 group towards lower-lying π* orbital on C=S or C=Se bond. This differe...