soil reduces the hazardous effects of compounds on the components of ecosystem because of self –purification property and the ability for their fixation. playing such a role in soils under redox conditions is performed by pedogenic fe-mn concentrations. in order to investigate cobalt, copper and lead accumulation in iron and manganese concentrations, at first the concentrations were precisely s...

music consumption is a new topic in the academic literature, but the consumption of music itself has been part of human culture for centuries and all human more or less listen to it in order to fill their leisure time. marketers always find it challenging to identify the best way for selling music which at the same time can be accepted by different consumers, too. so, we tried to investigate th...

the purpose of this study was to investigate the effect of perceptual – motor experience on motor development quotient of fine and gross motor skills in infants. fifteen 5-8-month-old healthy infants participated randomly in this study and were divided homogenously into two groups (experimental and control) according to their age. experimental group had 36 training sessions, each session an hou...

background and objectivesintercropping or simultaneous growing of two or more crops on the same piece of land has the potential of enhanced ecosystem productivity. in a cereal-legume intercropping system, an increase in cereal and a decrease in legume intercrop yield is reported. several indices such as land equivalent ratio (ler), relative crowding coefficient (k), competitive ratio (cr), aggr...

this qualitative study was conducted to identify the factors and barriers of entrepreneurship development from the perspective of iranian entrepreneurs. in terms of purpose, this study is applied- developmental and it is performed via descriptive phenomenological method. qualitative content analysis was used to collect the data. the study population comprised of recorded interviews with the ent...

omentin-1 is a novel adipokine that is predominantly secreted by visceral adipose tissue. circulating levels of omentin-1 is inversely related to obesity. there is limited information about the effect of exercise training on serum omentin-1 concentration. the aim of this study was to investigate the effect of four weeks of progressive resistance training on serum omentin-1 levels. 16 male wiste...

abstract background: radiosensitizer drugs are used to enhance the efficiency of radiotherapy. some nanoparticles can be considered as radiosensitizers, because they enhance cytotoxicity due to oxidative stress and increase free radical yield, especially ros , within cells resulting to cell death. methods: in this study, synergistic effect of tio 2 nanoparticles was evaluated in presence of 60 ...

introduction groundwater resources in arid-semiarid zones universally suffer from problems of over-abstraction and declining water tables. in addition to the issues related to quantity, degradation of groundwater quality now assumes major importance in the arid and semiarid regions. in such areas, natural factors such as the low precipitation, combined with high evapotranspiration, result in hi...

in this study, precipitated calcium carbonate (pcc) was modified using cationic starch, and its effect on optical and physical properties of paper was examined in comparison with unmodified filler afterwards. to determine the filler retention in paper, both modified and unmodified fillers were added to pulp suspensions by 20, 30, and 40 percentages. for comparing the utilization effect of modif...

abstract   background: multiple sclerosis (ms) is the most common autoimmune disease of central nervous system with destruction of myelin sheath mediated by auto reactive cd4+ t lymphocytes. because of the possible role of epstein-barr virus in etiology of ms and t cells immune response, the aim of this study was to evaluate anti-epstein barr virus antibodies as a marker of reactivity and produ...