background: para-nonylphenol (p-np) is one of the environmental pollutants which cause reproductive system disorders. objective: the effects of vitamin e on ovary structure during its development in rats treated with p-np. materials and methods: 32 wistar female rats after mating were divided into 4 groups; control vitamin e (100mg/kg/day) p-np (250mg/kg/day) and p-np + vitamin e. the rats were...

background: sodium arsenite and/ or vasectomy may cause variation in sex hormones which affect pathophysiology of reproductive organs. objective: the aim was to investigate the morphological changes in structure of testis and hormonal imbalance in bilateral vasectomised rats treated with sodium arsenite. materials and methods: four groups of rats: bilateral vasectomy + sodium arsenite, bilatera...

The prediction of size extremes in Wicksell’s corpuscle problem with oblate spheroids is considered. Three-dimensional particles are represented by their planar sections (profiles) and the problem is to predict their extremal size under the assumption of a constant shape factor. The stability of the domain of attraction of the size extremes is proved under the tail equivalence condition. A simp...

in pancreatic survey, quantitative and morphological characteristics could be fundamental variables for the evaluation of some structures. the aim of this study was the application of stereological methods for estimation of quantitative parameters and morphological evaluation of the pancreas in chickens. ten adult male and ten adult female native chickens were used in this study. routine tissue...

the length and structure of the transitional zone in the tunica media in the renal artery of adult male cats were investigated. in addition, the volume of the lumen and different layers in transitional and nontransitional zones in the right and left sides were also determined. morphometrical, histological and stereological studies were performed on 16 renal arteries of 8 adult male cats. after ...

background: bisphenol a (bpa), an environmental pollutant, can generate free radicals which damages the reproductive system. vitamin c is an antioxidant which may prevent the adverse effects of free radicals.objective: the aim was to investigate the effect of vitamin c on the ovary tissue in rats treated with bpa.materials and methods: in this experimental study, 24 female wistar rats (200±20 g...

background: vitamin e is an effective antioxidant, protecting cells against oxidative stress. objective: in this investigation the protective effect of vitamin e on the testis during development and spermatogenesis in rats exposed to sodium arsenite was evaluated. materials and methods: pregnant wistar rats were divided into 4 groups (n=8) control, sodium arsenite (8 mg/kg/day), sodium arsenite...