background: tamoxifen treatment induced cell death in the hippocampus formation of the prenatal and postnatal rat. the present study delineates the effect of tamoxifen on developing hippocampus in prenatal, postnatal and full term neonate rats received certain doses of the partial antagonist tamoxifen. methods: after perfusion and fixation, the brains were removed and processed for light and el...

surface topography and ultrastructure of dried cysts of artemia parthenogenetica (vedaranyam population) and bisexual artemia sp. (kelambakkam population) were studied electron microscopically in order to identify the bisexual strain, inhabiting covelong salterns, kelambakkam, south india. the scope of this study is to provide substantial information for further characterization of these artemi...

A B S T R A C T Introduction: Even today there is no effective drug therapy to prevent neuronal loss after brain stroke. In the present study we studied the effect of mitochondrial KATP channel regulators on neuronal ultrastructure after ischemia reperfusion in the rat. Materials & Methods: Rats temporarily subjected to four vessels occlusion for 15 minutes followed by 24 hours reperfusion with...

background: toxoplasmosis is one of the most common parasitic infections of humans and other mammals. this study was aimed to understand the mechanism of action of veterinary medicine-sulfachloropyrazine (spz, 99.97%) against toxoplasma gondii . methods: t. gondii tachyzoites were soaked in pbs (as a control) or spz (250 mg/ml) for 2 h at 37 °c. after being processed, any ultrastructural change...

introduction: the use of cell phones is widespread and there are public concerns regarding its possible deleterious effects on human health especially on the pregnancy outcomes. in this study, structural changes of the placenta after applying the cell phone radiation were examined in the mice model.   materials and methods: for this work, 40 pregnant balb/c mice were randomly allocated to one c...

The contraction of skeletal muscle (SM) plays an important role in providing power for the body to participate physical activities. Nevertheless, unaccustomed motions, especially eccentric exercises (EE), might cause changes ultrastructure and mitochondria SM, increasing potential risks injuries. objective this narrative literature review was summarize effects EE on SM ultrastructure. results f...

Synaptic ultrastructure is critical to many basic hypotheses about synaptic transmission. Various aspects of synaptic ultrastructure have also been implicated in the mechanisms of short-term plasticity. These forms of plasticity can greatly affect synaptic strength during ongoing activity. We review the evidence for how synaptic ultrastructure may contribute to facilitation, depletion, saturati...

a b s t r a c t introduction: even today there is no effective drug therapy to prevent neuronal loss after brain stroke. in the present study we studied the effect of mitochondrial katp channel regulators on neuronal ultrastructure after ischemia reperfusion in the rat. materials & methods: rats temporarily subjected to four vessels occlusion for 15 minutes followed by 24 hours reperfusion with...

herpetosiphon giganteus is a filamentous gliding bacterium. gliding motility is the movement of the cells over surfaces without the aid of flagella. the mechanism responsible for bacterial gliding motility has not been known and there are only a few data on herpetosiphon giganteus. the aim of this study was to observe the ultrastructure and negative staining of isolated strains of herpetosiphon...

Although the organization of bone ultrastructure, i.e. the orientation and arrangement of the mineralized collagen fibrils, has been in the focus of research for many years for cortical bone, and many models on the osteonal arrangement have been proposed, limited attention has been paid to trabecular bone ultrastructure. This is surprising because trabeculae play a crucial role for the mechanic...