background: human leukocyte antigens (hla) are polymorphic cell surface proteins. distribution of hla alleles vary among different racial and ethnic populations in unrelated stem cell registries. determination of hla allele frequencies in different ethnic groups is useful for population genetic analyses. materials and methods: based on data available from the iranian stem cell donor registry, h...

In an ethnically polarized country, does aversion towards inter-ethnic inequity induce citizens to vote for a party promoting an equitable allocation of national resources among ethnic groups? We base our analysis on a survey that we conducted among 331 students from Addis Ababa University. We show that aversion towards inter-ethnic inequity does exert a significant influence on university stud...

Based on the revised social contact theory, correlates of cross-ethnic friend nomination among 580 African American, 948 Asian-descent, 860 Latino, and 3986 White adolescents were examined. Socioeconomic and academic disparities between ethnic groups differentiated cross-ethnic friend nomination between schools for all groups but African Americans. For all groups, cross-ethnic friend nomination...

Research indicates that ethnic majority group children show a consistent preference for their ethnic in-group, whereas the ethnic preferences of minority groups are less conclusive. The present study assessed the ethnic attitudes of 5 – 12 year old children from an ethnic majority group (59 Anglo-Australian) and a minority group (60 Pacific Islander). Participants rated members of Anglo-Austral...

objective(s): smoking opium/cigarette is a global health concern. the aim of this study was to examine learning and memory of rat male offsprings whose mothers had been exposed to either opium or morphine with nicotine during pregnancy. materials and methods: wistar rats were used for the experiments. in the female rats, opium, morphine and nicotine dependencies were induced by daily injections...

identity and collective memory is one of the fascinating subjects in modern sociology. in iran, it arose again as modern and government-nation discourse emerged, and has been endlessly discussed since then. such subjects have assumed an increasing importance due to the multi-cultural and multi-ethical existence of iranian society and recent global developments. accordingly, the present study ha...

the absorption properties of charge transfer organic semiconductor ttf-tcnq (tetrathiafulvalene-tetracyanoquhodimete ) filmsdeposited on kbr singlecrystal, quartz and glass substrates in far infrared have been investigated. an absorption edge at ?10 ??m was observed. photoconductivity, photoconduction efficiency and gain and photocarrier's lifetime have been measured. the results show an e...

since the change of land use accrued in the iran, especially in northern iran, this research aims tocompare the spatial variability of soil properties in three adjacent land uses including cultivated by wheat lands, grazing lands and forest lands covered by juniperus sp,  fagus orientalis, quercus castanifolia, and acer velotinum species in kiasar region, mazandaran province, northern iran. som...

abstract consensus in the international community has grown over the past two years that hiv/aids poses a threat to development, security, and economic growth. a few studies over the last ten years have looked at the impact on workers and their employers. with momentum building to prevent new infections and treat those already afflicted, more information is needed to assess economic impacts and...