The eclipsing and double-lined spectroscopic binary system V453 Cygni consists of two early B-type stars, one of which is nearing the terminal age main sequence and one which is roughly halfway through its main sequence lifetime. Accurate measurements of the masses and radii of the two stars are available, which makes a detailed abundance analysis both more interesting and more precise than for...

In this study, the phylogeny and morphology of Mycosphaerella nawae (Dothideomycetes, Ascomycota) were examined using Korean and Japanese isolates, to establish the phylogenetic relationship between M. nawae and its allied species. Korean and Japanese isolates of M. nawae were collected from circular leaf spot-diseased leaves and were confirmed based on internal transcribed spacer (ITS) sequenc...

Wetland species of aculeate Hymenoptera are poorly known, even though many of them may serve as diagnostic or flagship species in nature conservation. Here we examined 6,018 galls induced ≥1 year prior their collection by the chloropid flies Lipara spp. The galls were collected at 34 sites in Central Europe. We examined 1,389 nests (4,513 individuals) of nine species, part of which were parasit...

It is usually known that the line of apsides of eclipsing binary star systems precesses due to general relativistic effects and classical (Newtonian) tidal and rotational deformations of the stars, whose rotation axes are assumed normal to the orbital plane. For almost all binaries, the expected theoretical and observed apsidal motion rates are in agreement. However, some systems –V541 Cygni, V...

High precision radial velocity observations of the solar-type star 16 Cygni B (HR7504, HD186427), taken at McDonald Observatory and at Lick Observatory, have each independently discovered periodic radial-velocity variations indicating the presence of a Jovian-mass companion to this star. The orbital fit to the combined McDonald and Lick data gives a period of 800.8 days, a velocity amplitude (K...

Abstract Ramularia collo-cygni B. Sutton and J.M. Waller is a major disease in Austrian barley-growing regions. To date, fungicide application the most effective method to manage disease; however, resistance demethylation succinate dehydrogenase inhibitors has developed over last few years. In growing seasons 2016/2017 2017/2018, field trials were carried out analyze efficiency of strategies ba...