In traditional public good experiments participants receive an endowment from the experimenter that can be invested in a public good or kept in a private account. In this paper we present an experimental environment that uses participants time as their natural endowment, which can be invested in the public good experiment. The experiment runs for several days and participants can make contribut...

purpose: to evaluate total plasma homocysteine level during the acute phase of central retinal vein occlusion (crvo) compared with a matched healthy group in iranian population, and determine whether hyperhomocysteinemia is also a risk factor for crvo. methods: a study group contains 54 patients presenting with crvo in recent one month, acute phase of the decease, was compared for fasting total...

abstract our previous studies showed that various extracts of persian shallot (allium hirtifolium) have anti-angiogenic effects. this study has been undertaken to isolate and identify the major effective anti-angiogeneic sub-fraction of shallot. after preparation of the 50% hydroalcoholic extract of shallot bulbs, the extract was successively fractionated into n-hexane, ethyl acetate, n-butanol...

background : doogh is a fermented beverage in which microbial spoilage is possible. benzoic acid and its salt (sodium benzoate) are added to doogh as antimicrobial preservative to control microbial spoilage. however, the use of this preservative has been prohibited in milk and dairy products such as food and drug administrationand institute of standards and industrial research of iran. thus, th...

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Facebook is only an electronic communication among human but unfortunately it has become an addiction for all. Also it is a latest trend of the youth, particularly high level students and the university students as well. This paper examines the usage of Facebook among university students and the influence it has on their academic performance. The impact of Facebook can either be good or bad on ...