@article{NeumannKasperKasper1991, author = {Neumann, Werner and Kasper, Sabine and Kasper, Roberto}, title = {Discharge Currents in Polymer Solids between Blocking Contacts}, isbn = {0-7803-0113- 7}, year = {1991}, language = {en} } @article{ReicheDietelLemmetyinenetal.1992, author = {Reiche, J{\"u}rgen and Dietel, Reinhard and Lemmetyinen, Helge and Janietz, Dietmar and Lemmetyinen, Helge and Brehmer, Ludwig}, title = {Edge-on Langmuir-Blodgett multilayers derived from disc-shaped multiyne mesogens}, year = {1992}, abstract = {Langmuir-Blodgett(LB) multilayers were prepared from disc-shaped multiyne mesogens based on amphiphilic alkyl pentakis(aryl-ethynyl)benzene ethers. The two compounds used are characterized by five hydrophobic flexible chains and one hydrophilic substituent at the terminal position of the alkoxy chain. The LB films were analysed by X-ray scattering and spectroscopic measurements. An edge-on arrangement of the two discotic pentaalkynes within Y-type bilayers with a different packing density proved to be possible for the LB films of both compounds.}, language = {en} } @article{ReichePietschFinketal.1992, author = {Reiche, J{\"u}rgen and Pietsch, Ullrich and Fink, Hans-Peter and Lemmetyinen, Helge}, title = {A comparison fo x-ray methods for structure refinement of Langmuir-Blodgett multilayers}, year = {1992}, abstract = {The possibilities and limits of structure refinement of Langmuir-Blodgett films by means of symmetrical reflection of X- rays are described using the example of a stearic acid multilayer. Three different techniques for the determiantion of the electron density profile from reflectivity data are compared; a Fourier method, a Patterson method, and model calculations. The important role of the a priori information for finding the besft structure model is outlined.}, language = {en} } @article{Mikelskis1992, author = {Mikelskis, Helmut}, title = {Combining issues of "girl-suited" science teaching, STS and constructivism in a physics textbook}, issn = {0157-244X}, year = {1992}, language = {en} } @article{HubrigMathys1993, author = {Hubrig, Swetlana and Mathys, Gautier}, title = {Mass loss, magnetic field and chemical inhomogenities in the he-weak star HD 21699}, year = {1993}, language = {en} } @article{Seehafer1994, author = {Seehafer, Norbert}, title = {Relaxation to equilibrium and inverse energy cascades in solar active regions}, isbn = {1-563-47099-3}, issn = {0079-6050}, year = {1994}, language = {en} } @article{Seehafer1994, author = {Seehafer, Norbert}, title = {Current helicity and the turbulent electromotive force}, year = {1994}, language = {en} } @article{Seehafer1994, author = {Seehafer, Norbert}, title = {Alpha effect in the solar atmosphere}, year = {1994}, language = {en} } @article{JanietzHofmannReiche1994, author = {Janietz, Dietmar and Hofmann, Dieter and Reiche, J{\"u}rgen}, title = {Molecular organization of amphiphilic disc-shaped penta-alkynes in LB-mono- and multilayers}, year = {1994}, abstract = {Amphiphilic disc-shaped penta-alkynes were studied with regard to their molecular organization in Langmuir-Blod- gett (LB) mono- and multilayers. It was found that each compound investigated forms edge-on arranged stable monolayers at the air-water interface. LB-multilayers derived from fivefold pentyl-substituted pentaynes are characterized by an edge-on ordering of the molecules within Y-type bilayers. One of these compounds, containing a hydoxy substituent as hydrophilic head group, is exemplified and two possible rectangular molecular assemblies perpendicular to the substrate, each with a columnar in-plane packing, will be discussed as a result of molecular modelling. Based on the experimental results, hexagonal layer packing in the LB-film of a disc-shaped penta-alkynyl carboxylic acid without lateral substituents proved to be possible, which, furthermore, could be confirmed by molecular mechanics simulation.}, language = {en} } @article{HochheimerMenonParthasarathyetal.1994, author = {Hochheimer, H. D. and Menon, V. and Parthasarathy, R. and Martin, C. R. and Bechthold, Jeff and Hor, P.-H. and Lorenz, Bernd and Spatz, J. P.}, title = {High pressure study of the temperature dependence of the conductivity of template synthesized polyaniline and polypyrrole}, year = {1994}, language = {en} }