@article{KumkeEidnerKrueger2005, author = {Kumke, Michael Uwe and Eidner, Sascha and Kr{\"u}ger, Tobias}, title = {Fluorescence quenching and luminescence sensitization in complexes of Tb3+ and Eu3+ with humic substances}, year = {2005}, abstract = {Intrinsic fluorescence quenching of humic substances (HS) and the sensitization of Ln(3+) luminescence (Ln3+ Tb3+, Eu3+) in HS complexes were investigated. Both measurements yielded complementary information on the complexation of metals by HS. Large differences between fulvic acids(FA)and humic acids (HA) were found. From time-resolved luminescence measurements it is concluded that a combination of energy transfer and energy back transfer between HS and Ln(3+) is responsible for the observed luminescence decay characteristics. In the case of Eu3+, an additional participation of charge-transfer states is suggested. A new concept for the evaluation of the sensitized luminescence decays of Ln(3+) was adapted}, language = {en} } @phdthesis{Duan2005, author = {Duan, Hongwei}, title = {Functional Nanoparticles as Self-Assembling Building Block and Synthetic Templates}, address = {Potsdam}, pages = {III, 107 S. : Ill., graph. Darst.}, year = {2005}, language = {en} } @phdthesis{Recih2005, author = {Recih, Oliver}, title = {Photonendichtewellenspektroskopie mit intensit{\"a}tsmodulierten Diodenlasern}, address = {Potsdam}, pages = {iii, 163 S. : graph. Darst.}, year = {2005}, language = {de} } @phdthesis{Asfaw2005, author = {Asfaw, Mesfin}, title = {Adhesion of multi-component membbranes and strings}, address = {Potsdam}, pages = {102 S. : graph. Darst.}, year = {2005}, language = {en} } @phdthesis{Delajon2005, author = {Delajon, Christophe Bernard}, title = {Wechselwirkung von Lipidmembranen mit Polyelektrolytmultischichten}, address = {Potsdam}, pages = {99 S. : graph. Darst.}, year = {2005}, language = {de} } @article{ApitzBellDamgaardetal.2005, author = {Apitz, Sabine E. and Bell, Elanor M. and Damgaard, Lars and Gilbert, Franck and Glud, R and Hall, P. O. J. and Kershaw, P. J. and Nickel, L and Parker, R and Rabouille, Christophe and Shimmield, Grahamm and Solan, Martin and Soltwedel, Thomas and Spagnoli, Federico and Witte, Ursula}, title = {Coastal Ocean Benthic Observatories (COBO) : integrated tools for the in situ observation and study of benthic ecosystem biogeochemical processes}, year = {2005}, language = {en} } @article{MallwitzLaschewsky2005, author = {Mallwitz, Frank and Laschewsky, Andr{\´e}}, title = {Direct access to stable, freestanding polymer membranes by layer-by-layer assembly of polyelectrolytes}, issn = {0935-9648}, year = {2005}, abstract = {A novel method to prepare ultrathin, freestanding polyelectrolyte films in pores, without the need of sacrificial precursor coatings, has been developed (see Figure). The freestanding films are stable under ambient conditions and suited for additional electrostatic self-assembly or surface modification. They can be specifically decomposed, whereas after thermal crosslinking, resistant films are obtained}, language = {en} } @article{KhattariRuschelWenetal.2005, author = {Khattari, Z. and Ruschel, Y. and Wen, H. Z. and Fischer, Anna and Fischer, T. M.}, title = {Compactification of a myelin mimetic Langmuir monolayer upon adsorption and unfolding of myelin basic protein}, issn = {1520-6106}, year = {2005}, abstract = {The surface shear viscosity of a myelin mimetic Langmuir monolayer is investigated upon adsorption of myelin basic protein (MBP). We measure an increase of the surface shear viscosity at picomolar concentrations of the protein, suggesting that the globular conformation of MBP changes upon adsorption at the monolayer. The conformational change enables hydrodynamic interactions of the proteins, with a typical separation of hundreds of nanometers. This unfolding is essential for the compactification of the myelin sheath, serving an enhanced saltatory signal transduction in vertebrates. The viscometry used extends the sensitivity of standard surface viscometers toward lower viscosities}, language = {en} } @article{KimSchildeLinker2005, author = {Kim, Boo Geun and Schilde, Uwe and Linker, Torsten}, title = {New radical approaches to 3-deoxy-D-oct-2-ulosonic acids (KDO)}, issn = {0039-7881}, year = {2005}, abstract = {Two different approaches. with an unsaturated carbohydrate as a radical acceptor and a carbohydrate derived aldehyde as a radical precursor, led to key intermediates in the synthesis of 3-deoxy-D-oct-2-ulosonic acids (KDO). Manganese(III) acetate and cerium(IV) ammonium nitrate were the reagents of choice for the oxidative generation of radicals, whereas samarium(II) iodide was employed for reductive couplings. Both strategies were realized by using easily available starting materials, with acetic acid as C-2 and ethyl acrylate as C-3 building blocks, respectively}, language = {en} } @article{HegewaldSchmidtGohsetal.2005, author = {Hegewald, J. and Schmidt, T. and Gohs, U. and Gunther, M. and Reichelt, R. and Stiller, Burkhard and Arndt, K. F.}, title = {Electron beam irradiation of poly(vinyl methyl ether) films : 1. Synthesis and film topography}, issn = {0743-7463}, year = {2005}, abstract = {Temperature-sensitive hydrogel layers on silicon (Si) substrates were synthesized by electron beam irradiation of spin-coated poly(vinyl methyl ether) (PVME) films. The influences of the used solvent, the polymer concentration, and the spinning velocity on the homogeneity and the thickness of the PVME film were investigated. In the range of concentration c(p) = 1-15 wt\% PVME in ethanol solution, homogeneous films with a thickness between d = 50 nm and 1.7 mu m were obtained. The films were cross-linked by electron beam irradiation under inert atmosphere and analyzed by sol-gel- analysis. The results were compared with bulkgels formed by electron beam irradiation of PVME in the dry state. The film topography was analyzed by high-resolution field emission scanning electron microscopy and atomic force microscopy. An islandlike structure in the dry, swollen, and shrunken state of the hydrogel films was observed}, language = {en} }