background: the extensive use of different nanoparticles has raised great concerns about their occupational and biological safety. objective: the aim of this study was to evaluate the cytotoxic effect of zinc oxide nanoparticles (zno nps) on viability of spermatozoa. materials and methods: semen samples were obtained from 15 healthy persons, and were analyzed using who guidelines. each semen sa...

this study was carried out in order to determine the effects of boron and cold stress on pollen germination of almond hybrids in vitro culture, two different media including the absence and presence of boron (0 mg/l, and 100 mg/l) in 10% sucrose and 1% agar medium at 24°c in dark conditions. the results showed that different treatments had a significant effect on the germination percentage. the...

objective(s): bone marrow mesenchymal stem cells (mscs) play an important role in bone health. cadmium causes osteoporosis, but the exact mechanisms of its effect on mscs are not known. materials and methods: rats were treated with cadmium chloride (40 mg/l) in drinking water for six weeks, and then the biochemical and morphological studies on mscs were carried out as a cellular backup for oste...