@misc{18854, author = {{Peckhaus, Volker}}, booktitle = {{Mathematical Reviews. MR2406251 (2009k:01008) }}, title = {{{Harborth, Heiko u.a., Gedenkschrift für Richard Dedekind. Ein Beitrag der Wirtschaft, vertreten durch die Industrie- und Handelskammer Braunschweig, Appelhans Verlag: Braunschweig 2007.}}}, year = {{2009}}, } @misc{18674, author = {{Peckhaus, Volker}}, booktitle = {{zbMATH Open, Zbl. 1160.01312}}, title = {{{Rusnock, Paul, Bolzano’s Philosophy and the Emergence of Modern Mathematics, Editions Rodopi: Amsterdam 2000 (Studien zur Österreichischen Philosophie; 30)}}}, year = {{2009}}, } @misc{18849, author = {{Peckhaus, Volker}}, booktitle = {{Mathematical Reviews, MR2373721 (2009c:01012)}}, title = {{{Tamari, Dov, Moritz Pasch. Vater der modernen Axiomatik – Seine Zeit mit Klein und Hilbert und seine Nachwelt. Eine Richtigstellung, Shaker Verlag: Aachen 2007}}}, year = {{2009}}, } @misc{18667, author = {{Peckhaus, Volker}}, booktitle = {{zbMATH Open, Zbl. 1157.01003}}, title = {{{Majer, Ulrich/Sauer, Tilman, “Intuition and the Axiomatic Method in Hilbert’s Foundation of Physics. Hilbert’s Idea of a Recursive Epistemology in His Third Hamburg Lecture”, in: Emily Carsons et al. (eds.), Intuition and the Axiomatic Method, Springer: Dordrecht 2006 (Western Ontario Series in Philosophy of Science; 70), 213–233}}}, year = {{2009}}, } @misc{18671, author = {{Peckhaus, Volker}}, booktitle = {{zbMATH Open, Zbl. 1160.01013}}, title = {{{Bolzano, Bernard, Erbauungsreden der Studienjahre 1808/09, Teilband 1, hg. v. Edgar Morscher und Kurt F. Strasser (Bernard Bolzano-Gesamtausgabe: Reihe II.A.16,1), Friedrich Frommann Verlag-Günther Holzboog: Stuttgart-Bad Cannstatt 2008}}}, year = {{2009}}, } @misc{18673, author = {{Peckhaus, Volker}}, booktitle = {{zbMATH Open, Zbl. 1160.01014}}, title = {{{Bolzano, Bernard, Erbauungsreden der Studienjahre 1808/09, Teilband 2, hg. v. Edgar Morscher und Kurt F. Strasser (Bernard Bolzano-Gesamtausgabe: Reihe II.A.16,2), Friedrich Frommann Verlag-Günther Holzboog: Stuttgart-Bad Cannstatt 2008}}}, year = {{2009}}, } @misc{18670, author = {{Peckhaus, Volker}}, booktitle = {{zbMATH Open, Zbl. 1158.00005}}, title = {{{Jagnow, René, “Edmund Husserl on the Applicability of Formal Geometry”, in: Emily Carsons et al. (eds.), Intuition and the Axiomatic Method, Springer: Dordrecht 2006 (Western Ontario Series in Philosophy of Science; 70), 67–85}}}, year = {{2009}}, } @misc{18852, author = {{Peckhaus, Volker}}, booktitle = {{Mathematical Reviews, MR2374248 (2009h:03095) }}, title = {{{Löwenheim, Leopold, „Funktionalgleichungen im Gebietekalkül und Umformungsmöglichkeiten im Relativkalkül“, History and Philosophy of Logic 28 (2007), 305–336}}}, year = {{2009}}, } @misc{18851, author = {{Peckhaus, Volker}}, booktitle = {{Mathematical Reviews, MR2374247 (2009h:03004) }}, title = {{{Thiel, Christian, “A Short Introduction to Löwenheim’s Life and Work and to a Hitherto Unknown Paper”, History and Philosophy of Logic 28 (2007), 289–302}}}, year = {{2009}}, } @misc{18848, author = {{Peckhaus, Volker}}, booktitle = {{Mathematical Reviews, MR2361784 (2009b:03003) }}, title = {{{Blanchette, Patricia A., “Frege on Consistency and Conceptual Analysis”, Philosophia Mathematica (3) 15 (2007), 321–346}}}, year = {{2009}}, } @misc{18858, author = {{Peckhaus, Volker}}, booktitle = {{Mathematical Reviews, MR2479206 (2009k:03004)}}, title = {{{Tatievskaya, Elena, „Wittgenstein über Komplexe“, Logique & Analyse 204 (2008), 395–409}}}, year = {{2009}}, } @article{3060, author = {{Gries, Thomas and Naudé, Wim}}, journal = {{Innovation: The European Journal of Social Science Research}}, number = {{3}}, pages = {{309--328}}, title = {{{Entrepreneurship and regional economic growth: towards a general theory of start-ups}}}, doi = {{10.1080/13511610903354877}}, volume = {{22}}, year = {{2009}}, } @article{54931, abstract = {{Proteinuria and increased renal reabsorption of NaCl characterize the nephrotic syndrome. Here, we show that protein-rich urine from nephrotic rats and from patients with nephrotic syndrome activate the epithelial sodium channel (ENaC) in cultured M-1 mouse collecting duct cells and in Xenopus laevis oocytes heterologously expressing ENaC. The activation depended on urinary serine protease activity. We identified plasmin as a urinary serine protease by matrix-assisted laser desorption/ionization time of-flight mass spectrometry. Purified plasmin activated ENaC currents, and inhibitors of plasmin abolished urinary protease activity and the ability to activate ENaC. In nephrotic syndrome, tubular urokinase-type plasminogen activator likely converts filtered plasminogen to plasmin. Consistent with this, the combined application of urokinase-type plasminogen activator and plasminogen stimulated amiloride-sensitive transepithelial sodium transport in M-1 cells and increased amiloride-sensitive whole-cell currents in Xenopus laevis oocytes heterologously expressing ENaC. Activation of ENaC by plasmin involved cleavage and release of an inhibitory peptide from the ENaC gamma subunit ectodomain. These data suggest that a defective glomerular filtration barrier allows passage of proteolytic enzymes that have the ability to activate ENaC.}}, author = {{Svenningsen, Per and Bistrup, Claus and Friis, Ulla G. and Bertog, Marko and Haerteis, Silke and Krueger, Bettina and Stubbe, Jane and Jensen, Ole Nørregaard and Thiesson, Helle C. and Uhrenholt, Torben R. and Jespersen, Bente and Jensen, Boye L. and Korbmacher, Christoph and Skøtt, Ole}}, journal = {{Journal of the American Society of Nephrology}}, number = {{2}}, pages = {{299–310}}, publisher = {{Ovid Technologies (Wolters Kluwer Health)}}, title = {{{Plasmin in Nephrotic Urine Activates the Epithelial Sodium Channel}}}, doi = {{10.1681/asn.2008040364}}, volume = {{20}}, year = {{2009}}, } @article{54932, abstract = {{Incubation of microvascular endothelial cells with combretastatin A-4 phosphate (CA-4P), a microtubule-destabilizing compound that preferentially targets tumor vessels, altered cell morphology and induced scattering of Golgi stacks. Concomitantly, CA-4P up-regulated connective tissue growth factor (CTGF/CCN2), a pleiotropic factor with antiangiogenic properties. In contrast to the effects of other microtubule-targeting agents such as colchicine or nocodazole, up-regulation of CTGF was only detectable in sparse cells, which were not embedded in a cell monolayer. Furthermore, CA-4P induced CTGF expression in endothelial cells, forming tube-like structures on basement membrane gels. Up-regulation of CTGF by CA-4P was dependent on Rho kinase signaling and was increased when p42/44 mitogen-activated protein kinase was inhibited. Additionally, FoxO transcription factors were identified as potent regulators of CTGF expression in endothelial cells. Activation of FoxO transcription factors by inhibition of phosphatidylinositol 3-kinase/AKT signaling resulted in a synergistic increase in CA-4P-mediated CTGF induction. CA-4P-mediated expression of CTGF was thus potentiated by the inhibition of kinase pathways, which are targets of novel antineoplastic drugs. Up-regulation of CTGF by low concentrations of CA-4P may thus occur in newly formed tumor vessels and contribute to the microvessel destabilization and antiangiogenic effects of CA-4P observed in vivo.}}, author = {{Samarin, Jana and Rehm, Margot and Krueger, Bettina and Waschke, Jens and Goppelt-Struebe, Margarete}}, journal = {{Molecular Cancer Research}}, number = {{2}}, pages = {{180–188}}, publisher = {{American Association for Cancer Research (AACR)}}, title = {{{Up-Regulation of Connective Tissue Growth Factor in Endothelial Cells by the Microtubule-Destabilizing Agent Combretastatin A-4}}}, doi = {{10.1158/1541-7786.mcr-08-0292}}, volume = {{7}}, year = {{2009}}, } @article{54944, abstract = {{The epithelial sodium channel (ENaC) is probably a heterotrimer with three well characterized subunits (alphabetagamma). In humans an additional delta-subunit (delta-hENaC) exists but little is known about its function. Using the Xenopus laevis oocyte expression system, we compared the functional properties of alphabetagamma- and deltabetagamma-hENaC and investigated whether deltabetagamma-hENaC can be proteolytically activated. The amiloride-sensitive ENaC whole-cell current (DeltaI(ami)) was about 11-fold larger in oocytes expressing deltabetagamma-hENaC than in oocytes expressing alphabetagamma-hENaC. The 2-fold larger single-channel Na(+) conductance of deltabetagamma-hENaC cannot explain this difference. Using a chemiluminescence assay, we demonstrated that an increased channel surface expression is also not the cause. Thus, overall channel activity of deltabetagamma-hENaC must be higher than that of alphabetagamma-hENaC. Experiments exploiting the properties of the known betaS520C mutant ENaC confirmed this conclusion. Moreover, chymotrypsin had a reduced stimulatory effect on deltabetagamma-hENaC whole-cell currents compared with its effect on alphabetagamma-hENaC whole-cell currents (2-fold versus 5-fold). This suggests that the cell surface pool of so-called near-silent channels that can be proteolytically activated is smaller for deltabetagamma-hENaC than for alphabetagamma-hENaC. Proteolytic activation of deltabetagamma-hENaC was associated with the appearance of a delta-hENaC cleavage product at the cell surface. Finally, we demonstrated that a short inhibitory 13-mer peptide corresponding to a region of the extracellular loop of human alpha-ENaC inhibited DeltaI(ami) in oocytes expressing alphabetagamma-hENaC but not in those expressing deltabetagamma-hENaC. We conclude that the delta-subunit of ENaC alters proteolytic channel activation and enhances base-line channel activity.}}, author = {{Haerteis, Silke and Krueger, Bettina and Korbmacher, Christoph and Rauh, Robert}}, journal = {{Journal of Biological Chemistry}}, number = {{42}}, pages = {{29024–29040}}, publisher = {{American Society for Biochemistry and Molecular Biology}}, title = {{{The $\delta$-Subunit of the Epithelial Sodium Channel (ENaC) Enhances Channel Activity and Alters Proteolytic ENaC Activation}}}, doi = {{10.1074/jbc.m109.018945}}, volume = {{284}}, year = {{2009}}, } @article{54938, abstract = {{The lipid environment of the epithelial sodium channel (ENaC) and its possible association with so-called lipid rafts may be relevant to its function. The aim of our study was to confirm the association of ENaC with lipid rafts and to analyze the effect of cholesterol depletion of the plasma membrane by methyl-beta-cyclodextrin (MbetaCD) on channel function and regulation. Using sucrose density gradient centrifugation we demonstrated that a significant portion of ENaC protein distributes to low density fractions thought to be typical lipid raft fractions. Importantly, cholesterol depletion of cell lysate by MbetaCD shifted ENaC to non-raft fractions of higher density. Live cell imaging demonstrated that treatment with MbetaCD largely reduced filipin staining over time, confirming cholesterol depletion of the plasma membrane. For electrophysiological studies intact oocytes were exposed to 20 mM MbetaCD for three hours. MbetaCD treatment had no consistent effect on baseline whole-cell ENaC currents. In addition to the typical single channel conductance of about 5 pS, subconductance states of ENaC were occasionally observed in patches from MbetaCD treated but not from control oocytes. Importantly, in outside-out patch clamp recordings the stimulatory effect of recombinant SGK1 in the pipette solution was essentially abolished in oocytes pretreated with MbetaCD. These results indicate that ENaC activation by cytosolic SGK1 is compromised by removing cholesterol from the plasma membrane. Thus, ENaC activation by SGK1 may require the presence of an intact lipid environment and/or of lipid rafts as signalling platform.}}, author = {{Krueger, Bettina and Haerteis, Silke and Yang, Limin and Hartner, Andrea and Rauh, Robert and Korbmacher, Christoph and Diakov, Alexei}}, journal = {{Cellular Physiology and Biochemistry}}, number = {{5-6}}, pages = {{605–618}}, publisher = {{S. Karger AG}}, title = {{{Cholesterol Depletion of the Plasma Membrane Prevents Activation of the Epithelial Sodium Channel (ENaC) by SGK1}}}, doi = {{10.1159/000257516}}, volume = {{24}}, year = {{2009}}, } @article{54945, abstract = {{We describe a programming scheme for massively distributed systems that are assumed to self-organize according to a given set of simple rules. The focus of this investigation is operation and control in Sensor and Actor Networks (SANETs). The main issues addressed by self-organization techniques are scalability, network lifetime, and real-time support. In the literature, biological principles are often cited as inspirations for technical solutions, especially in the domain of self-organization. We developed a system named Rule-based Sensor Network (RSN) according to the observed communication and control behavior in cellular communication. Cellular signaling cascades allow the event-specific reaction initiated by individual cells in collaboration with their direct neighbors. Information between cells are transmitted via proteins and result in the cascade of protein-protein or protein-DNA interactions to produce a specific cellular answer, e.g. the activation of cells or the transmission of mediators. These processes are programmed in every individual cell and lead to a coordinated reaction on a higher organization platform. We transferred these mechanisms to operation and control in SANETs. In particular, a rule-based processing scheme relying on the main concepts of cellular signaling cascades has been developed. It relies on simple local rules and provides problem specific reaction such as local actuation control and data manipulation. We describe this RSN technology and demonstrate comparative simulation results that show the feasibility of our approach.}}, author = {{Dressler, Falko and Dietrich, Isabel and German, Reinhard and Krueger, Bettina}}, issn = {{1389-1286}}, journal = {{Elsevier Computer Networks}}, number = {{10}}, pages = {{1737–1750}}, publisher = {{Elsevier}}, title = {{{A Rule-based System for Programming Self-Organized Sensor and Actor Networks}}}, doi = {{10.1016/j.comnet.2008.09.007}}, volume = {{53}}, year = {{2009}}, } @misc{55026, author = {{Kanning, Julian}}, booktitle = {{Metzler Lexikon DDR-Literatur. Autoren – Institutionen – Debatten}}, editor = {{Opitz, Michael and Hofmann, Michael}}, pages = {{297--301}}, publisher = {{Metzler}}, title = {{{Schriftstellerkongresse}}}, year = {{2009}}, } @misc{55030, author = {{Kanning, Julian and Esau, Miriam}}, booktitle = {{Metzler Lexikon DDR-Literatur. Autoren – Institutionen – Debatten}}, editor = {{Opitz, Michael and Hofmann, Michael}}, pages = {{109--110}}, publisher = {{Metzler}}, title = {{{Gratzik, Paul}}}, year = {{2009}}, } @misc{55029, author = {{Kanning, Julian and Esau, Miriam }}, booktitle = {{Metzler Lexikon DDR-Literatur. Autoren – Institutionen – Debatten}}, editor = {{Opitz, Michael and Hofmann, Michael}}, pages = {{75--77}}, publisher = {{Metzler}}, title = {{{Deicke, Günther}}}, year = {{2009}}, }