introduction: increase of environmental challenges inevitably changes our methods; challenges such as rapid change, diversity of workforce, globalization, evolution and transformation of business and family roles, lack of skills and emergence of service sector affect not only the organizational structure but also the nature and functional role of business. in response to these environmental cha...

during a five years survey in markazi province, 136 species related to 42 bird's family have been identified, that include 27% of the birds' species and 58% of the birds families of iran. (iranian birds). 36% of birds were endemic and 64% were migrant. cosidering the species variety in markazi province, sylvidae family is number one. the population of corvidae family are more than oth...

white been line wa8592-1 was first introduced in iran through the yield trail nurseries received fron ciat in 1991. in observation nurseries carried out during 1992 and 1993 cropping seasons, ten bean populations were evaluated for yield and other characteristics, and 60 lines were selected. preliminary and advanced yield trails carried out for six years (1995-2000) in four locations khomein, e...

in the course of our survey on oribatid mite fauna of the orchards of the city of arak (markazi province), in 2005-2006, we identified the species tectoribates ornatus (schuster). this species belongs to the family tegoribatidae and is a new record for the iranian mite fauna.