the toxic impact of copper sulfate in lethal and sublethal concentrations was investigated on gill of grass carp, ctenopharynogodon idella . in this investigation, 27 specimens were used as control group and three treatment groups were treated with 2.5 and 5mg/l of copper sulfate. gill samples were collected from each treatment after 96hr and lesions were analyzed by light microscopy. in histop...

schwannomas are benign neoplasms with unknown etiology, which apparently arise from neural sheath schwann cells. intraoral schwannomas are solitary, slow-growing lesions occurring at different ages; these lesions are normally asymptomatic and in some cases, they are accompanied by pain and paresthesia if spotted in the intraosseous regions of the mandibles. definitive diagnosis of schwannoma is...