background: this study was performed to induce conversion of rh strain tachyzoites of toxoplasma gondii to bradyzoites by ph changing of the cul­ture medium. methods: hela cell monolayers were infected at a 1:1 tachyzoite to cell ratio. four hours after infection, the culture medium was removed and re­placed with culture medium and 5% fcs, adjusted to ph 8 with naoh. the culture was maintained ...

introduction: toxoplasma gondii is an obligatory interacelullar parasite that infects nucleated cells in its intermediate hosts. the aim of the present study was to determine the effect of vitamin d3 on the multiplication of t. gondii in peritoneal macrophage of balb/c mice and nitric oxide production by macrophages.  methods: according to usage of vitamin d3 (one dose or seven doses) and infγ ...

  Eviscerated sea bass, Dicentrarchus labrax were irradiated by Cobalt-60 at commercial irradiation facility at dose of 2.5 and 5 kGy at 2–4°C. The influences of the irradiation on proximate, fatty acid and amino acid composition in cultured sea bass were investigated. Significant differences (P<0.0.5) were found between non-irradiated and irradiated sea bass in terms of moisture, protein, fat,...