Browsing Fakultät für Physik (inkl. GAUSS) by Referee "Salditt, Tim Prof. Dr."
Now showing items 41-60 of 71
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Ein Verfahren zur Herstellung zweidimensionaler Röntgenwellenleiter
(2013-07-15)As X-ray beams only weakly interact with matter, conventional refracting optics are not suitable for the use in this energy range. Instead, different approaches replace conventional optics in the X-ray regime, one of them ... -
Primary Effects of X-ray and Photo-Absorption Induced Excitations in Biomolecules
(2013-06-27)To see whether single molecule scattering experiments can yield atomic resolution structures of biomolecules, it is necessary to understand the physics underlying the radiation damage processes induced by the X-ray ... -
A Dedicated Endstation for Waveguide-based X-Ray Imaging
(2012-08-30)X-ray microscopy has emerged as a powerful and versatile imaging technique in many fields of science over the last years, offering insights in opaque media at high spatial resolution. A major challenge remains the ... -
Herstellung von Optiken für weiche Röntgenstrahlung und deren Charakterisierung an Labor- und Synchrotronstrahlungsquellen
(2012-03-29)Within the last decades soft X-ray microscopy methods win increasing importance. Labratory-scale laser-induced plasma sources make this radiation available to a larger community of researchers ... -
Wave optical simulations for x-ray nano-focusing optics
(2012-02-22)Curved x-ray multilayer mirrors focus synchrotron beams down to tens of nano metres. A wave-optical theory describing propagation of two waves in an elliptically curved focusing multilayer ... -
Synaptic Vesicles Studied by Small-Angle X-Ray Scattering
(2010-12-21)The heterogeneous structure of synaptic vesicles isolated from rat brain is investigated considering solution small-angle x-ray scattering data in combination with data obtained by cryogenic ... -
Aggregation and Gelation in Random Networks
(2010-06-23)In this thesis the formation, elasticity, and structure of randomly cross-linked networks is investigated analytically and with the help of computer simulations. In the first two chapters, ... -
Soft X-ray stereo microscopy for investigation of dynamics and elemental distribution of colloidal systems from the environment
(2010-03-12)Soil colloids are classified to be in a size range of 1nm to 1μm. Their huge specific surface determines the interactions of the soil colloids, which differ from the behaviour of the same ... -
Collective Short Wavelength Dynamics in Phospholipid Model Membranes - with Inelastic Neutron Scattering
(2009-07-20)Phospholipid membranes often serve as simple model systems to understand basic properties of their far more complex biological counterparts. One of the most significant aims in membrane ... -
Einzelmolekülstudien auf Nanoskalen: STED Fluoreszenzfluktuationsspektroskopie
(2009-06-17)Fluorescence Microscopy Methods are widely used in the Life Sciences to visualize and spectroscopically analyze biologically processes. Single molecule methods, such as FCS (Fluorescence ... -
High-Resolution Microscopy with Photoswitchable Organic Markers
(2009-03-23)The resolution of conventional microscopes is limited by Abbe"s diffraction barrier. The resolution barrier, however, can be fundamentally broken by sequentially switching marker substances ... -
Tuning DNA Compaction
(2008-08-13)DNA compaction is the collapse of long DNA chains into well-organized condensates of complex, hierarchical nanostructure induced by the presence of cationic agents. Although much progress ... -
Actin Filaments and Bundles in Flow
(2008-08-06)Actin, a protein and major component of the cytoskeleton, is organized in vivo into filaments, bundles, and networks which play an important role in mechanical stability and cellular motility. ... -
Enhanced Conformational Sampling of Proteins Using TEE-REX
(2008-02-29)Today's standard molecular dynamics (MD) simulations of moderately sized biomolecular systems at full atomic resolution are typically limited to the sub-microsecond timescale and therefore suffer from limited conformational ... -
Selectivity, Regulation, and Inhibition of Aquaporin Channels. A Molecular Dynamics Study
(2008-02-19)Aquaporins (AQPs) form a large family of transmembrane protein channels which have been found throughout nature. AQPs facilitate the highly efficient and selective flux of water across biological membranes, whereas ... -
Functional Domain Motions and Processivity in Bacterial Hyaluronate Lyase
(2007-08-02)Processive enzymes are a special class of enzymes which presumably remain attached to their polymeric substrates between multiple rounds of catalysis. Due to this property, the substrate ... -
Stucture Changes in Nephila Dragline: The Influence of Temperature, Humidity and Mechanical Load
(2007-06-05)The emphases of this thesis are the observation, the analysis and the interpretation of the response of Nephila dragline s crystalline parts to temperature, humidity and mechanical load. ... -
Strukturelle Untersuchung der amorph/kristallinen Grenzfläche mittels quantitativer hochauflösender Transmissionselektronenmikroskopie an den Systemen a-Si/c-Si und a-Ge/c-Si
(2006-12-11)In this Thesis the interfaces between covalently bonded crystalline and amorphous materials were studied with regard to the induced ordering in the amorphous material in the interfacial ... -
A waveguide-based lens-less x-ray microscope
(2006-09-05)A lot of effort is currently invested to realize phase contrast imaging with hard x-rays. For specimen consisting of light elements, e.g. biological samples, the induced phase shift of the ... -
Biological Matter in Microfluidic Environment - from Single Molecules to Self-Assembly
(2006-08-02)The interior as well as the exterior of cells is governed by networks composed of fibrous proteins. The mesh size of these networks is on the order of micrometers and therefore distinguishes ...