On the basis of solid-state aluminium-27 nuclear magnetic resonance measurements a new organo-aluminium complex in coal substance was discovered in the solid extracts obtained both from the Ostrava-Karviná bituminous coal and the North Bohemian Basin brown coal. In the 27 Al MAS NMR spectra it was found that the significant chemical shift at 13.6-14.6 ppm corresponds with that obtained for the aluminium hexaphenoxide complex (14.2 ppm). Therefore, organo-aluminium complex with hexa-coordination to oxygen is present in coal substance., Pavel Straka., and Obsahuje bibliografické odkazy
When spectators see a baroque play staged with use of period means of expression, they often appreciate fine form, but lack emotions. Dealing with Jesuit school plays from the first half of the 18th century, whose theme is true friendship, this article illustrates that baroque drama actually combines stylized form and strong emotions. It was also the main aim of baroque theatre: to transfer the emotions through this form., Magdaléna Jacková., and Obsahuje bibliografické odkazy
The Association for Youth, Science and Technology is a non-governmental, non-profit organization of children and youth. AMAVET brings together 3500 registered active members working in various scientific disciplines. AMAVET plays an important role in conjuction with schools and school institutions, in forming the mindset of young people through informal education, which is becoming a valuable part of a whole life education. The Committee of AMAVET has chosen the ten best student projects on May 6-7, 2008 at the Academy of Sciences of the Czech Republic. and Gabriela Adámková.