down’s syndrome, or 21 trisomy, is the most common autosomal abnormality, with incidence of 1 per 815 live births in iran. worldwide reports indicate that about 95% are regular trisomy, or nondisjunction, 1% are mosaic and 4% due to translocation. however, these values show a geographical variation. a cytogenetic study of down's syndrome, or trismoy 21, was carried out on 366 cases (202 males a...

background: potyviruses are accounted for 40% of viral diseases of various crops including vegetables and legumes. potyviruses can be transmitted through plant sap, seeds and many aphid species. due to ease of spread of these viruses detection of such viruses are crucial as to the control of the incited diseases. objectives: this study compared the efficiencies of two couples of primers in thei...

abstract the mosaic art as a decorative element in buildings enjoys several thousand years of age in egypt, mesopotamia, greece, rome and byzantium and is widely usedbut technically speaking, the earliest mosaic forms have poorly made. they were made by insertion of fruit cores or broken pottery pieces in the wet mud mortar of walls. later, the art evolved rapidly and extensively used for archi...

Cucumber mosaic virus (CMV) is one of the causal agents of viral diseases that infected mint (Mentha spp.). CMV is a member of the cucumovirus genus in  Bromoviridae family. The virus is naturally transmitted by aphids in a non-persistent manner.During  growing season 2007-2008, leaf samples from plants of mint fields with symptoms of viral disease were collected in mint fieldas in Tehran provi...

Cucumber mosaic virus (CMV) is one of the causal agents of viral diseases that infected mint (Mentha spp.). CMV is a member of the cucumovirus genus in  Bromoviridae family. The virus is naturally transmitted by aphids in a non-persistent manner.During  growing season 2007-2008, leaf samples from plants of mint fields with symptoms of viral disease were collected in mint fieldas in Tehran provi...

cucumber mosaic virus (cmv) belongs to the genus cucumovirus in the family bromoviridae. althaea officinalis, commonly known as hollyhocks in the family malvaceae, is an annual plant whose fruit, flower and root are used as medicinal products. in this study, five samples of hollyhocks leaves with viral symptoms were collected and cmv was detected using das-elisa from the samples. ta-alth isolat...