TY  - JOUR
A1  - Kumke, Michael Uwe
A1  - Eidner, Sascha
A1  - Krüger, Tobias
T1  - Fluorescence quenching and luminescence sensitization in complexes of Tb3+ and Eu3+ with humic substances
N2  - 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
Y1  - 2005
ER  - 
TY  - THES
A1  - Duan, Hongwei
T1  - Functional Nanoparticles as Self-Assembling Building Block and Synthetic Templates
Y1  - 2005
CY  - Potsdam
ER  - 
TY  - THES
A1  - Recih, Oliver
T1  - Photonendichtewellenspektroskopie mit intensitätsmodulierten Diodenlasern
Y1  - 2005
CY  - Potsdam
ER  - 
TY  - THES
A1  - Asfaw, Mesfin
T1  - Adhesion of multi-component membbranes and strings
Y1  - 2005
CY  - Potsdam
ER  - 
TY  - THES
A1  - Delajon, Christophe Bernard
T1  - Wechselwirkung von Lipidmembranen mit Polyelektrolytmultischichten
Y1  - 2005
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Apitz, Sabine E.
A1  - Bell, Elanor M.
A1  - Damgaard, Lars
A1  - Gilbert, Franck
A1  - Glud, R
A1  - Hall, P. O. J.
A1  - Kershaw, P. J.
A1  - Nickel, L
A1  - Parker, R
A1  - Rabouille, Christophe
A1  - Shimmield, Grahamm
A1  - Solan, Martin
A1  - Soltwedel, Thomas
A1  - Spagnoli, Federico
A1  - Witte, Ursula
T1  - Coastal Ocean Benthic Observatories (COBO) : integrated tools for the in situ observation and study of benthic ecosystem biogeochemical processes
Y1  - 2005
ER  - 
TY  - JOUR
A1  - Mallwitz, Frank
A1  - Laschewsky, André
T1  - Direct access to stable, freestanding polymer membranes by layer-by-layer assembly of polyelectrolytes
N2  - 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
Y1  - 2005
SN  - 0935-9648
ER  - 
TY  - JOUR
A1  - Khattari, Z.
A1  - Ruschel, Y.
A1  - Wen, H. Z.
A1  - Fischer, Anna
A1  - Fischer, T. M.
T1  - Compactification of a myelin mimetic Langmuir monolayer upon adsorption and unfolding of myelin basic protein
N2  - 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
Y1  - 2005
SN  - 1520-6106
ER  - 
TY  - JOUR
A1  - Kim, Boo Geun
A1  - Schilde, Uwe
A1  - Linker, Torsten
T1  - New radical approaches to 3-deoxy-D-oct-2-ulosonic acids (KDO)
N2  - 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
Y1  - 2005
SN  - 0039-7881
ER  - 
TY  - JOUR
A1  - Hegewald, J.
A1  - Schmidt, T.
A1  - Gohs, U.
A1  - Gunther, M.
A1  - Reichelt, R.
A1  - Stiller, Burkhard
A1  - Arndt, K. F.
T1  - Electron beam irradiation of poly(vinyl methyl ether) films : 1. Synthesis and film topography
N2  - 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
Y1  - 2005
SN  - 0743-7463
ER  -