European beech (Fagus sylvatica L.) seedlings of three different origins were used to evaluate the effect of water deficit and recovery during the most vulnerable phase of forest tree life. Gas-exchange characteristics and fluorescence rapid light curves were studied in the seedlings from a warm region (PV1, 530 m a.s.l.), seedlings from a moderately warm region (PV2, 625 m a.s.l.), optimal for beech, and in seedlings from a cool region (PV3; 1,250 m a.s.l.). Changes in photosynthetic characteristics caused by water deficit were similar, but their intensity was dependent on the origin of the seedlings. Simulation of drought conditions by the interruption of watering led to a decrease in the efficiency of primary photochemistry in PSII, with the most significant decrease in the PV2 seedlings. Conversely, water deficit affected most significantly gas exchange in PV3, where the recovery process was also the worst. The PV1 demonstrated the highest resistance to water deficit. Drought-adaptation of beech seedlings at non-native sites seems to be linked to water availability and to the origin of the beech seedlings., E. Pšidová, Ľ. Ditmarová, G. Jamnická, D. Kurjak, J. Majerová, T. Czajkowski, A. Bolte., and Obsahuje bibliografii
Publikace poměrně podrobně charakterizuje vývoj slovenské ekonomiky, a zvláště dopravy již od poloviny 19. století, byť ve svém jádru pojednává o období samostatné Slovenské republiky (1939-1945) a poválečného tříletí. Podle recenzenta jde o velmi solidní a komplexní práci, jejíž největší přínos spočívá ve využití velkého množství dosud nezpracovaných pramenů a v zachycení pozoruhodných rozdílů v rozvoji dopravní infrastruktury, technologií a způsobů cestování mezi českými zeměmi a Slovenskem v různých obdobích., The publication History of transportation in Slovakia 1938-1948 (1950): Its boundaries and limits characterizes in a fairly detailed manner the development of the Slovak economy since the mid-1800s, although its core deals with the independent Slovak Republic (1939-1945) and the first three years after the war. In the reviewer´s opinion, it is a very solid and comprehensive work the greates contribution of which consists in the use of a large amount of hitherto unprocessed sources and a capture of remarkable differences in the development of transportation infrastructure, technologies, and modes of travel between Slovakia and the Cezch Lands in various periods of time., [autor recenze] Pavel Szobi., and Obsahuje bibliografii a bibliografické odkazy
Cieľom článku je stručně zhrnúť niektoré výsledky výskumu mechanizmu uväznenia farby v kvantovej chromodynamike na mriežke, s dôrazom na úlohu centra kalibračnej grupy a tzv. centrálnych vortexov., Štefan Olejník., and Obsahuje seznam literatury