Štěnice domácí (Cimex lectularius) svým parazitickým způsobem života dohání k šílenství miliony lidí po celém světě. Přes všechny negativní aspekty jsou štěnice velmi zajímavým objektem studia, zejména pak po stránce cytogenetiky. Vyznačují se nezvyklými holokinetickými chromozomy a mnoha dalšími zvláštními modifikacemi průběhu buněčného dělení. Třešničkou na dortu je ohromná variabilita v počtu pohlavních chromozomů., The Bed Bug (Cimex lectularius) with its parasitic way of life is known around the whole world. However, in spite of all the negatives, Bed Bugs are very interesting objects to study, particularly in the field of cytogenetic science. They are characterised by unusual holokinetic chromosomes and many more interesting modifications of cell division. The icing on the cake is the huge variability in the number of sex chromosomes., and David Sadílek, Martin Forman, Jitka Vilímová.
Vysychání kapek a následné formování "kávových kroužků" představuje velice zajímavou fyziku z běžného života. V článku se však pustíme dále - do oblasti aplikací tohoto jevu - a ukážeme si, jak pomáhá koncentrovat biomolekuly, které jsou pak přístupné studiu Ramanovou spektroskopií. Položíme si otázku, jak se liší konformace biomolekul v "kávových kroužcích" od jiných fází, přidáme však i přehled dosavadních užití až po biomedicínské aplikace., Desiccation of droplets and subsequent formation of "coffee rings" represents very interesting physics in an ordinary life. in this article, we go further into the region of applications of this phenomenon and we show that it helps to concentrate biomolecules, which are then accessible to Raman spectroscopy. We address questions about the difference of conformation of biomolecules in "coffee rings" with respect to other phases, finally we give an overview of the present employment of this method as far as biomedical applications., Vladimír Kopecký Jr., and Obsahuje bibliografii
The Algatech Centre, which is a scientific division of the Institute of Microbiology of the CAS located in the Opatovický mlýn (mill) near Třeboň in South Bohemia, focuses on the research of photosynthetic microorganisms, including algae, cyanobacteria and photosynthetic bacteria. The Laboratory of algal biotechnology studies processes and technology involved in the efficient production of algae and the use of algal biomass. It seeks new bio-active compounds in algae to be used as dietary supplements, in pharmacology and biomedicine. Scientists also carry our research into various metabolites of cyanobacteria and their effects on human cells. Special interest is paid to substances inhibiting the division of cancer cells and/or selectively inducing their apoptosis. The Laboratory of anoxygenic phototrophs is engaged in the basic research of evolutionary very old prokaryotes containing photosynthetic reaction centres composed of bacteriochlorophyll and its researchers have recently discovered an entirely new photosynthetic species - a new family of phototrophic bacteria, i.e. bacteria capable of producing energy through photosynthesis. Only three new families of phototrophic bacteria were discovered over the past 100 years.The Laboratory of cell cycles of algae aims at gaining a deeper insight into molecular mechanisms regulating the specific cells cycle in green algae hat divide by multiple fission - that is divide into more than two daughter cells. Scientists´ objective is to leam more about the regulation of cell size and division, the activity of cyclin dependant kinase and cyclin dependant kinase complexes throughout the normal cell cycle as well as their role in the cell cycle interruption in case of DNA damage. The pattern of cell cycle progression in algae can also tell us more about animal embryos, since the early phases of their growth and development are controlled by similar principles as those in green algae., The Laboratory of photosynthesis studies fundamental biochemical and molecular mechanisms regarding photosynthesis, the ways of its regulation during the day or under specific stress conditions. Special attention is paid particularly to photosystem II and researchers in the laboratory have recently made a significant step towards understanding its biogenesis. Photosystem II is a complicated protein complex present in the cells of plants, algae and cyanobacteria, the proper functioning of which is essential for photosynthesis. Research teams from the Algatech centre, together with colleagues from British universities have described the first phases of photosystem II synthesis, namely the mechanism by which chlorophyll molecules are inserted into core proteins of photosystem IIand how the functional core of this complex is assembled. Moreover, they have recently presented a substantially new view of repair mechanisms of photosystem II and the ways of recognition of its damaged protein subunits that have to be degraded and replaced. Deepening the understanding of fundamental processes in algae, cyanobacteria and photosynthetic bacteria can help use their potential in many practical applications, from biomass and biofuels to medicine., and Jana Olivová.
Bedřich Štěpánek (1884-1943) byl významnou osobností domácího protihabsburského odboje za první světové války a prvním československým vyslancem ve Spojených státech amerických. V důsledku rozporů s úředníky vyslanectví a intrik musel v roce 1923 svou funkci opustit a odešel i ze služeb ministerstva zahraničí, poté žil jako soukromník ve Spojených státech, kde zemřel za nevyjasněných okolností. Edice dosud nepublikované korespondence mezi Bedřichem Štěpánkem a kancléřem prezidenta republiky Přemyslem Šámalem (1867-1941) podle recenzenta nejen poodkrývá vyslancovy životní osudy, ale také poskytuje jedinečný vhled do zákulisí formující se československé diplomatické služby, meziválečného politického vývoje ve Spojených státech i tehdejší dramatické mezinárodní situace., Bedřich Štěpánek (1884-1943) was an important figure in the Czech anti-Habsburg resistance at home during the First World War and he was the first Czechoslovak envoy to the United States after the founding of Czechoslovakia in October 1918. Following disagreements with embassy officials as well as intrigues, he had to quit his post, in 1923, and leave the ministry of foreign affairs. He then lived, self-employed, in the United States, where he died in unexplained circumstances. According to the reviewer, this volume of never-before published correspondence between Bedřich Štěpánek and Přemysl Šámal (1867-1941), the chief of staff of the Czechoslovak president, not only partly reveals aspects of Štěpánek life, but also provides a unique look behind the scenes of the Czechoslovak diplomatic service in its early years, as well as interwar political developments in the United States and the dramatic international situation at that time., [autor recenze] Jan Koura., and Obsahuje bibliografické odkazy