We present spatially resolved near-IR spectroscopic observations of 15 young stars. Using a grism spectrometer behind the Keck interferometer, we obtained an angular resolution of a few milliarcseconds and a spectral resolution of 230, enabling probes of both gas and dust in the inner disks surrounding the target stars. We find that the angular size of the near-IR emission typically increases w...

A high content of heavy metals in the soil and plants a magnesite mining area might cause serious damage to environment can be threat health surrounding population. This paper presents results research that focused on analyzing metal dumping grounds factory Jelšava-Lubeník (Slovakia). The analysis (X-ray fluorescence spectrometry, atomic absorption spectrometry), (inductively coupled plasma mas...

Over the pastdecade, particular attention has been paid to studies of chemical composition medical plants identify possible negative consequences using raw plant material polluted with heavy metals for production drugs. In our study, we analyzed growing in impact area Novocherkassk power station. Specifically, Artemisia austriaca, Poa pratensis and Elytrigia repenswere examined analysis.The con...

Broom snakeweed (snakeweed) is a native range shrub found throughout semiarid rangelands of the western United States, which increases and dominates plant communities after disturbances such as overgrazing, drought, or wildfire. The objective of this study was to compare the ability of selected grass species and prostrate kochia to restrict establishment and growth of snakeweed seedlings in pot...

T Tauri stars are variable stars that are in an early phase of evolution, in which accretion and contraction to the main sequence are still taking place. Their photometric variability is complex; it takes place on a variety of timescales, due to a variety of physical processes. Periodic variability occurs due to rotation and the presence of cool or hot spots on the star. It may also occur due t...