TY - JOUR A1 - Hummel, Detlev A1 - Hübner, Roland T1 - Zum potentiellen Markt für Immobilienderivate in Deutschland : ausgewählte Ergebnisse einer Befragung institutioneller Investoren zu terminbörslichen Immobilienkontrakten in Deutschland Y1 - 2000 ER - TY - JOUR A1 - Angelow, Jürgen T1 - Forschung in ungelüfteten Räumen : Anmerkungen zur Militärgeschichtsschreibung in der ehemaligen DDR Y1 - 2000 SN - 3-506-74475-5 ER - TY - JOUR A1 - Segert, Astrid A1 - Zierke, Irene T1 - Handlungsstrukturen in einer ökologisch orientierten Genossenschaft Y1 - 2000 ER - TY - JOUR A1 - Kleßmann, Christoph T1 - Stationen des öffentlichen und historiographischen Umgangs in Deutschland mit der Zäsur von 1945 Y1 - 2000 ER - TY - JOUR A1 - Fennekohl, Alexandra A1 - Lucas, Maria A1 - Püschel, Gerhard Paul T1 - Induction by interleukin 6 of G(s)-coupled prostaglandin E(2) receptors in rat hepatocytes mediating a prostaglandin e(2)-dependent inhibition of the hepatocyte's acute phase response N2 - Prostanoids, that are released from nonparenchymal liver cells in response to proinflammatory stimuli, are involved in the regulation of hepatic functions during inflammation. They exert their effects on their target cells via heptahelical receptors in the plasma membrane. For the 5 prostanoids prostaglandin E(2) (PGE(2)), prostaglandin F(2alpha), prostaglandin D(2) (PGD(2)), prostacyclin, and thromboxane A(2) there exist 8 receptors that are coupled to different heterotrimeric G proteins. These receptors are expressed differentially in the 4 principal liver cell types, i.e., hepatocytes, Kupffer cells, sinusoidal endothelial cells, and hepatic stellate cells. It was intriguing, that the messenger RNA (mRNA) of none of the G(s)-coupled prostanoid receptors (DP-R, EP2-R, EP4-R, and IP-R) that can attenuate the inflammatory reaction were present in hepatocytes. The current study shows that the expression of the G(s)-coupled prostanoid receptors EP2-R, EP4-R, and DP-R, but not the IP-R, was efficiently and rapidly up-regulated by treatment of hepatocytes in vitro or rats in vivo with the key acute phase cytokine interleukin 6 (IL-6). In IL-6-treated hepatocytes PGE(2) in turn attenuated the IL-6-induced alpha(2)-macroglobulin formation via a cyclic adenosine monophosphate (cAMP)- dependent signal chain. The data indicate that an IL-6-mediated induction of the previously not expressed EP2-R and EP4- R on hepatocytes might establish a prostanoid-mediated feedback inhibition loop for the attenuation of the acute phase response. Y1 - 2000 ER - TY - JOUR A1 - Burhenne, Matthias A1 - Schneider, Ingo T1 - Rieselfelder N2 - Geschichte, Entwicklung und Funktionsprinzip von Rieselfeldern werden im zusammenhang mit der gesellschaftlichen Diskussion um Belastungs- und Gefährdungspotential beschrieben. Y1 - 2000 ER - TY - JOUR A1 - Weithoff, Guntram A1 - Lorke, Andreas A1 - Walz, Norbert T1 - Effects of water-column mixing on bacteria, phytoplankton, and rotifers under different levels of herbivory in a shallow eutrophic lake N2 - Water column mixing is known to have a decisive impact on plankton communities. The underlying mechanisms depend on the size and depth of the water body, the nutrient status, and the plankton community structure and they are well understood for shallow polymictic and deep stratified lakes. Two consecutive mixing events of similar intensity under different levels of herbivory were performed in enclosures in a shallow, but periodically stratified, eutrophic lake, in order to investigate the effects of water column mixing on bacteria abundance, phytoplankton abundance and diversity, and rotifer abundance and fecundity. When herbivory by filter-feeding zooplankton was low, water column mixing provoking a substantial nutrient input into the euphotic zone, led to an intense net increase of bacteria and phytoplankton biomass. Phytoplankton diversity was lower in the mixed enclosures than in the undisturbed ones owing to the larger contribution of a few fast-growing species. After the second mixing event at high biomass of filter-feeding crustaceans, the increase of phytoplankton biomass was lower than after the first mixing, and diversity remained unchanged as the enhanced growth of small fast-growing was prevented by zooplankton grazing. Bacteria abundance did not increase after the second mixing, when cladoceran biomass was high. Rotifer fecundity indicated a transmission of the phytoplankton response to the next trophic level. Our results suggest that water column mixing in shallow eutrophic lakes with periodic stratification has a strong effect on the plankton community by enhanced nutrient availability rather than resuspension or reduced light availability. This fuels the basis of the classic and microbial food chain via enhanced phytoplankton and bacteria growth, but the effects on biomass may be dampened by high levels of herbivory. Y1 - 2000 ER - TY - THES A1 - Fisch, Christian T1 - Strafbarkeitsausschluß durch berechtigte Geschäftsführung ohne Auftrag : zur strafbarkeitsausschließenden Wirkung der berechtigten Geschäftsführung ohne Auftrag (§§ 677 ff. BGB) im Verhältnis zwischen Geschäftsherrn und Geschäftsführer T2 - Europäische Hochschulschriften : Reihe 2, Rechtswissenschaft Y1 - 2000 SN - 3-631-37101-2 SN - 0531-7312 VL - 3024 PB - Lang CY - Frankfurt am Main ER - TY - JOUR A1 - Beim Graben, Peter A1 - Saddy, Douglas A1 - Schlesewsky, Matthias A1 - Kurths, Jürgen T1 - Symbolic dynamics of event-related brain potentials Y1 - 2000 ER - TY - JOUR A1 - Baur, Jürgen T1 - Ostdeutsche Sportvereine im Übergang : zum Institutionentransfer im Sport Y1 - 2000 SN - 3-88020- 369-5 ER -