Hydrogeochemical investigations of groundwater in Torbat-Zaveh plain have been carried out to assess the water quality for drinking and irrigation purposes. In this study, 190 groundwater samples were collected and analyzed for physicochemical parameters and major ion concentrations. The abundance of major cations and anions was in the following order: Na(+) > Mg(2+) > Ca(2+) > K(+), and Cl(-) ...

maedi-visna (mv) virus and caprine arthritis encephalitis (cae) virus known as small ruminant lentiviruses (srlvs) cause chronic diseases in susceptible animals. the main reservoirs of these viral agents are sheep and goat. in sheep, mv virus causes a disease as the same name of the virus. this is the first seroprevalence survey of srlvs in sheep population of khorasan-e-razavi province in iran...

because of low spatial resolution and simplifications in meteorological processes in global circulation models, they cannot sufficiently simulate the weather, comparing to the regional models; then, spatial and temporal downscaling of the gcm outputs are needed for decreasing errors of the global circulation models. there are two methods of downscaling: statistical and dynamic. weather generato...

due to its neighborhood with afghanestan and the subsequent problems of this country such as insecurity, weak economic conditions, and lack of proper border monitoring, khorasan razavi province has always been the inhabitat of numerous foreign nationals. legal and illegal entry of these people has created plenty of issues from different economic, social, and cultural aspects for the citizens of...

Dear Editor, HIV infection, the same as other chronic diseases, is associated with psychiatric symptoms. 1 A profound psychological distress is made after the diagnosis of infection, and several psychiatric disorders including AIDS phobia, bereavement and grief, anxiety and depression were shown as a reaction to the infection. 2 Associating the infection to the stigmatized and illegal behaviors...