Sarcocystis species have a two-host life cycle, with carnivores as definitive hosts and herbivores as intermediate hosts (Soulsby 1982). Species of the genus Sarcocystis are widely distributed parasites of mammals and birds (Neva and Brown 1994). Goat breeding has an important role in many areas of the world, not only for meat and milk production but also to make use of the natural pasture on mountains which is unsuitable for other species. There are three reported species of Sarcocystis in domestic goats: Sarcocystis capracanis, Sarcocystis hircicanis and Sarcocystis caprafelis (also referred to as Sarcocystis moulei). S capracanis and S hircicanis produce microscopic sarcocysts, while S caprafelis produces macroscopic cysts. S capracanis is the most pathogenic species in goats, causing fever, weakness, anorexia, weight loss, tremors, irritability, abortion and death (Dubey and others 1989). There are no reports on the prevalence of Sarcocystis species in goats in Iran. Several attempts have been made to study the prevalence of Sarcocystis species in slaughtered goats in various countries,
Metallic hollow spheres (MHSs) are developed to be used in structural applications in syntactic and metal foams. These foams are lightweight and energy-absorbing structures which also can be used for acoustic insulation. In this study, the fabrication process of MHSs with optimum mechanical properties has been investigated. To achieve this goal, polystyrene spheres were coated with iron powder and an organic binder. During the multi-stage heat treatment, the green spheres were sintered into MHSs. Sintering was done at various temperatures (1125, 1150, 1175 and 1200°C) at different durations (3:30, 4:30 and 5:30 h). The influence of the different sintering durations and temperatures on mechanical features, microstructure and density was studied as well. The obtained results indicate that samples that were sintered at the temperature of 1175°C for 4:30 h resulted in superior mechanical and physical properties.
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