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Rudnicki Adolf (Engl.)
(2003)
Korczak Janusz (Engl.)
(2003)
Lesmian Boleslaw
(2003)
Herbivorous fish feed on cyanobacteria. Digestability differs, however, between cyanobacteria species without mucous cover and mucilaginous genera such as Microcystis. The latter can pass fish guts almost undamaged, and it has been hypothesized that they can take up nutrients during gut passage. Here we tested whether live Microcystis, as food for juvenile roach labeled with 33P, indeed showed higher radioactivity after gut passage as compared to gut contents in control experiments with fish fed heated Microcystis. Microcystis showed high viability after passage through roach guts, and live colonies had a significantly higher radioactivity than dead ones. We conclude that Microcystis is protected against digestion in roach guts and can directly use the phosphorus supplied in the fish guts during passage.
The Barbara Petchenik Award was created by the International Cartographic Association in 1993. The aims of the competition are to promote childrens creative representation of the world, to enhance their cartographic awareness and to make them more conscious of their environment. Every two years a lot of children from all over the world take part in this competition. The national committee for organizing the competition in Germany collected and archieved all of the german entries since 1993. The evaluation of the childrens maps takes place continuous and get an insight into the cartogaphic and spatial comprehension of the children. The favourite subjects of the paintings depend on the age of children and current occurrences during the time of making the maps (map as document of the times). Designing an own map requires a good knowledge of cartographic rules. Therefor especially the creation of thematic maps shows very clear the stage of development of childrens cartographic education and spatial ideas. The connection of their selected subjects with the map design is very different. Either the most imaginative created subject in a way of a picture or the exact cartographic design comes to the fore. In some cases were noticed a very good combination between figurative and cartographic expression with a high harmony of a recognizable message and cartographic content. A development of cartographic and spatial comprehension in general can be seen, but the childrens maps waver between reality and fantasy.
NIETHAMMER bietet einen umfassenden, äußerst kritischen, vielseitigen und anregenden Blick auf die Erfolgsgeschichte des Identitätsbegriffes. Zunächst zeigt er im Werk herausragender Intellektueller der ersten Hälfte des 20. Jahrhunderts frühe Spuren des Begriffes. Da es seinerzeit bereits um kollektive Identität ging, bestreitet NIETHAMMER die Ansicht, kollektive Identität sei nach dem Zweiten Weltkrieg aus personaler Identität abgeleitet worden. Schon in diesen frühen Varianten betrachtet er den Begriff als ein in höchst unterschiedlichen Zusammenhängen verwendetes, konnotationsreiches "Plastikwort", das mehr verhülle als begreife. Aus diesem Grunde formuliert NIETHAMMER, auch in seiner anschließenden Skizze zu Phasen der neueren Konjunktur kollektiver Identität, eine scharfe Kritik und Ablehnung des Begriffes, die allerdings zum Teil überzogen ist und nicht vollständig auf alle dargestellten Variationen des Begriffes zutrifft. Keywords: kollektive Identität, personale Identität, Theorie, Begriffsgeschichte, Identitätspolitik, Interdisziplinarität