PURPOSE To characterize histopathologic and electroretinographic (ERG) changes in the retina of pigmented rats injected with sodium iodate in order to establish a model of retinal degeneration for future cell therapy studies. METHODS In 50 male pigmented rats weighing 250-300 grams, NaIO3 was injected into the left orbital venous plexus at 40 and 60 mg/kg doses (25 eyes in each group). Fourte...

We present almost-simultaneous detections of Cygnus X-1 in the radio and mm regimes, obtained during the low/hard X-ray state. The source displays a flat spectrum between 2 and 220 GHz, with a spectral index |α| ≤ 0.15(3σ). There is no evidence for either a lowor high-frequency cut-off, but in the mid-infrared (∼ 30μm) thermal emission from the OB-type companion star becomes dominant. The integ...

We report on the association of an X-ray source (WGA J2025.1+3342), serendipitously found with BeppoSAX in two separate observations, with the unidentified EGRET source 3EG J2027+3429. The source is detected from 1 keV up to about 100 keV, has a flat (Γ=0.6-1.5) spectrum and is highly variable both in intensity and shape. The data indicate marginal evidence for an iron line in the source rest f...

wind regime and sand grain size are two of the factors that determine the morphology and dynamics of sand dunes in desert areas. regarding the importance of wind effects on sand dunes especially in iran, in this study, khartooran erg was analyzed to determine wind direction and to detect sand source sites. khartooran erg is located on eastern north of iran and lies in khorasan razavi and semnan...

purpose: to determine normal values of standard full field electroretinography (erg) and to evaluate variation with age in an iranian population. methods: the amplitudes and implicit times of ergs from 170 normal subjects aged 1 to 80 years were recorded according to the international society for clinical electrophysiology of vision. study participants included subjects who refered to our clini...

PURPOSE To investigate the influence of deficiency in superoxide dismutase (SOD) 1, a major antioxidative enzyme, on retinal ganglion cells (RGCs). METHODS In the SOD1 total knockout (SOD1-deficient) mice, the level of superoxide anion was measured using dihydroethidium. The number of RGCs was counted in both the retinal sections and the flat-mount retinas after retrograde labeling. Thickness...

purpose : to evaluate the toxic retinal effects of intravitreal bevacizumab used for the treatment of exudative age-related macular degeneration (amd) using ganzfeld electroretinography (g-erg) methods : in this prospective comparative interventional study, 23 patients with active choroidal neovascularization (cnv) associated with amd were enrolled. patients were received intravitreal injection...