Browsing Naturwissenschaften, Mathematik und Informatik by Title
Now showing items 5424-5443 of 5496
-
X-ray crystallographic studies on two cysteine-rich anticarcinogenic microproteins
(2004-08-04)Two cysteine-rich, anticarcinogenic microproteins belonging to distinct protein classes were studied with X-ray crystallographic methods.The lima bean trypsin-chymotrypsin inhibitor (LBTI) ... -
X-ray Diagnostics of Accretion Plasmas in Selected Soft Polars
(2009-09-10)Accretion processes occur during diverse stages of stellar evolution and on diverse scales, as for example in star formation, in active galactic nuclei, or in close binaries with a compact ... -
X-ray magnetic circular dichroism in iron/rare-earth multilayers and the impact of modifications of the rare earth's electronic structure
(2001-02-22)This work illuminates the possibilities of circular magnetic dichroism in X-ray absorption (XMCD) for the studies of ordered magnetism. The element and electron-shell sensitivity of this ... -
X-Ray Micro- and Nano-Diffraction Imaging on Human Mesenchymal Stem Cells and Differentiated Cells
(2017-06-13)Recent advances in hard x-ray optics, instrumentation and detection have made it possible to probe biological samples by combining diffraction with raster scanning, using step sizes on the order of cellular organelle ... -
X-Ray Near-Field Holography: Beyond Idealized Assumptions of the Probe
(2017-11-08)All images are flawed, no matter how good your lenses, mirrors etc. are. Especially in the hard X-ray regime it is challenging to manufacture high quality optics due to the weak interaction of multi-keV photons with matter. ... -
X-ray waveguide optics: Beyond straight channels
(2017-04-28)Modern x-ray sources and analysis techniques such as lens less imaging combined with phase retrieval algorithms allow for resolving structure sizes in the nanometerrange. For this purpose optics have to be employed, ... -
X-ray waveguides and waveguide-based lensless imaging
(2006-06-06)The scope of the present thesis is X-ray waveguides and applications in waveguide-based lensless X-ray microscopy. The propagation of X-rays in waveguides is analysed analytically for some ... -
Yeast Chorismate Mutase: Molecular Evolution of an Allosteric Enzyme
(2003-01-30)Chorismate mutase (CM, EC 5.4.99.5), encoded by ARO7, catalyzes the Claisen rearrangement of chorismate to prephenate in the biosynthesis of the amino acids tyrosine and phenylalanine. The ... -
Yeast cleavage factor Hrp1 is a novel guard protein that surveils pre-mRNA 3’ processing
(2022-05-10)Hrp1 is a component of the cleavage and polyadenylation complex (CPF-CF) for pre-mRNA cleavage and polyadenylation in S. cerevisiae. It specifically binds to a relatively conserved UA-rich domain called the efficiency-element ... -
Z →ττ Cross Section Measurement and ττ Mass Reconstruction with the ATLAS Detector at the LHC
(2012-11-14)In this dissertation, the Z to tautau decay where one τ decays leptonically and the other one hadronically is presented. The process is studied with data collected from the ATLAS experiment in pp collisions at c-m-s = 7 TeV ... -
Z-graded supergeometry: Differential graded modules, higher algebroid representations, and linear structures
(2021-06-21)The purpose of this thesis is to present a self-standing review of $\mathbb{Z}$- (respectively $\mathbb{N}$-)graded supergeometry with emphasis in the development and study of two particular structures therein. Namely, ... -
Zahlungen für Naturschutz im Wald - Problem und Lösungsansatz aus Sicht des Agency-Ansatzes
(2017-05-17)In relation to the growing demands on forests, financial environmental policy instruments move more and more in the focus. In Europe, such instruments exist already in the field of nature conservation. In the frame of the ... -
Zahlungsbereitschaftsanalysen in der umweltökonomischen Bewertung von öffentlichen Gütern des Waldes
(2018-12-20)The lack of availability of market prices for public goods in forests creates the need to obtain reliable assessments for them. Market failure, which occurs when goods influence third parties positively or negatively but ... -
Zeeman tomography of magnetic white dwarfs
(2006-10-12)The aim of this work has been to develop a method that allows to derive the distribution of the surface magnetic fields of magnetic white dwarfs from a set of rotation-phase resolved flux ... -
Zeitaufgelöste Fluoreszenzspektroskopie unimolekularer Reaktionen im Überschalldüsenstrahl: <i>trans-cis</i>-Photoisomerisierung, Phenylringtorsion, intramolekularer Wasserstoffatomtransfer
(2005-11-02)In this work three types of unimolecular reactions were studied spectroscopically and theoretically with model systems: (1) the trans-cis-photoisomerization of trans-stilbene and its ... -
Zeitaufgelöste inelastische Neutronenstreuung an entmischenden Silber-Natriumchlorid-Einkristallen
(2002-11-20)The kinetic of decomposition in silver sodium chloride single crystals has been studied by means of the evolution of phonon spectra. In the early stages of decomposition a spinodal ... -
Zeitlich modulierte Statistik der periodisch gestörten turbulenten Kanalströmung
(2002-03-25)The turbulent channel flow is subjected to a temporal change of the boundary conditions, either by periodic variation of a longitudinal wall speed or, alternatively, by periodic variation ... -
Zeitwahrnehmung in isochronen Sequenzen
(2009-09-03)The predictions of three different psychological models for time perception were compared with the results of seven experiments. In each experiment the participants listened to a sequence ... -
Zellbiologie der Knochenresorption
(2002-12-04)Recently, several lines of evidence suggested that activated fibroblasts might contribute to bone resorption in rheumatoid arthritis and also in aseptic prosthesis loosing. Till now, only ... -
Zellbiologische Untersuchung α-Mannosidase-defizienter und Enzym-behandelter Mäuse
(2009-11-04)The deficiency of the lysosomal α-mannosidase leads to the lysosomal storage disease α-mannosidosis. A feasible option for the treatment of this disease is the substitution of the missing ...