background: infection with helicobacter pylori might be related to chronic gastritis, peptic ulcer and gastric adenocarcinoma. given the high prevalence of helicobacter infection in our region, this study was designed to determine the age trend of helicobacter pylori contamination in golestan province in 2008. materials andmethods: this cross-sectional descriptive study was carried out on 1028 ...

the challenge for today's researchers and practitioners agriculture, increase productivity while maintaining or improving environmental quality (including water, soil and air) to be ¬ rapid population growth and increasing demand for food, researchers are continuing to study the management of high yielding varieties suitable for growing to escape environmental stresses in dry conditions an...

recognizing of genetic diversity and genetic potential of each plant species is necessary and essential before any works on breeding program. genetic diversity among five populations of walnut (juglans regia l.) was studied using 11 ssr markers. the marker system produced 77 alleles in a range size of 176-275 bps. the minimum (2) and maximum (11) numbers of alleles were related to genetic locus...

in this study the effects of some soil properties on uptake arsenic and cadmium by silybum marianum was studied. to this end surrounding area asphalt plant of city kalaleh, was divided to 6 pieces (a, b, c, d, e, f), with an area of approximately one hectare. plots a and d on both sides of the river, are the nearest areas asphalt plant. also a non-polluting area as a control was considered. ars...

background: there are unorganized, published documents about the ecology of mosquitoes (diptera: culicidae) in northeastern part of iran. the purpose of this study was to determine the distribution and characteristics of larval habitats of culicidae in kalaleh county. methods: larvae were collected using dipping method and adults by human landing catch technique during april–october, 2012. larv...

background: ectoparasites of mammalian hosts play an important role for transmission of diseases from the host res­ervoirs to human. the aim of this study was to determine the species composition and infestation parameters for para­sitic arthropods associated with rhombomys opimus. methods: ectoparasites of r. opimus were collected from seven endemic district of zcl in iran including shirvan an...

backgrounds normal or elevated values of serum alanine aminotransferase level (alt) vary in different studies mostly related to characteristics of reference population including age, gender, body mass index, nonalcoholic fatty liver disease (nafld), and metabolic syndrome prevalence. objectives to measure upper normal limit (unl) for serum alt in an apparently healthy iranian old population (wh...