Introduction: The CC chemokine receptor 5 (CCR5) is known as the main co-receptor in human immunodeficiency virus (HIV) infection. Accumulating evidence verified 32bp deletion both alleles of CCR5 provides natural resistance to HIV Accordingly, recent therapeutic approaches are based on gene and cell therapies by inducing this resistance. Allogeneic transplantation stem cells with CCR5Δ32 homoz...

introduction: heavy metals are types of elements naturally present in soil or enter into soil as a result of human activities. the most important route of exposure to heavy metals is daily intake of food. crops grown in contaminated soil (due to mining activities, industrial operations and agriculture) may contain high concentrations of heavy metals. also closeness to cities and industrial cent...

background: qual2k is a stream water quality model and was used to evaluate the water quality of the kine-vars river and assess the response of the river to nutrient management strategies. methods: for that purpose, 7 sample stations were selected and surface water samples were collected in the winter and summer of 2012 and were analyzed for temperature, dissolved oxygen, biological oxygen dema...

late neoproterozoic-early cambrian schists have been occurred in southwest of zanjan city from the soltanieh belt. the soltanieh belt in northwest of iran is uplifted basement of precambrian-paleozoic in main central iran zone and includes outcrops of precambrian, paleozoic and mesozoic formations. late neoproterozoic-early cambrian schists, the oldest stratigraphy unit in the region, consist o...

background: h. pylori infection is one of the most common infections worldwide. the prevalence of this infection among children varies due to socioeconomic development and differs among different countries. regarding the absence of previous studies for the iranian children, this research was performed to detect the prevalence of h. pylori infection among children of city of zanjan. methods: in ...