Properties of the line structure of a well developped active region, as visible at the photospheric level, including umbral dots and penumbral filaments of sunspots, facular points, disturbed
granules, are described. Properties of a few cbromospheric features are also descoribed because they are dosely connected to tbe pbotospheric ones. Empirical and theoretical models which can explain the observed properties are discussed.
The proteocephalid tapeworm Proteocephalus torulosus (Batsch, 1786) exhibited a marked seasonality in its occurrence and maturation in barbel (Barbus harhus L.) from the Jihlava River, South Moravia, Czech Republic. Recruitment took place in winter and early spring, growth and maturation in spring and gravid worms left the fish hosts in May; during summer and autumn, the parasite was almost absent from the fish population. Parasite burden was related to fish size, with larger barbel being more heavily infected than smaller ones.
The article informs about a computer designing of mechanical parts, assemblies and semiassemblies by the designers from the Meopta-optika, a.s. in the systems Autocad and Pro/ENGINEER and describs the technique of mechanical parts, production documentation and mentions the other possibilities of the CAD system in case of a new project designing as well.