E-Dissertationen: Suche
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Functional morphology of an adaptive radiation – sailfin silversides from Sulawesi as a model system
(2024-01-11)
The adaptive fish radiation of sailfin silversides from Sulawesi serves as a model system for studying adaptive divergence. The phylogenetic lineage of “roundfins” is endemic to ancient Lake Matano and is composed of three ......
Spectroscopy of Xenon and Xenon-Noble Gas Mixtures for Bose-Einstein Condensation of Vacuum-Ultraviolet Photons
(2024-01-03)
Bose-Einstein condensation of photons has first been observed in 2010 by the group of Martin Weitz in Bonn. In the experimental scheme, a photon gas is confined to a wavelength-size microcavity filled with a liquid dye ...
Improved Approximation Algorithms for Weighted k-Set Packing
(2024-01-16)
We study the weighted k-Set Packing problem, which is defined as follows: The input consists of a finite collection S of non-empty sets, each of cardinality at most k, as well as a positive weight for each of the sets. The ...
pH Regulation in Human Sperm
(2024-01-18)
In the female reproductive tract, sperm undergo a maturation process, called capacitation, which enables sperm to fertilize the oocyte. The complex cellular mechanisms underlying capacitation are not well understood. Besides ...
Functional characterization of Gαi/s proteins and modulation of their activity by linear and cyclic peptides
(2024-01-30)
Heterotrimeric Gαβγ (guanine nucleotide-binding) proteins serve as molecular switches to activate (“switch on”) or inactivate (“switch off”) diverse intracellular signaling cascades in response to stimulated G protein-coupled ...
Enzymatische Herstellung und Reinigung von Fructooligosacchariden des Inulin-Typs und deren Verwertung durch abundante Darmbakterien
(2024-01-24)
Fructooligosaccharide vom Inulin-Typ (I-FOS) sind präbiotische Fructan-Oligomere, die hauptsächlich aus ß-(2,1)-verknüpften Fructose-Einheiten bestehen. I-FOS haben aufgrund ihrer gesundheitsfördernden Wirkung und funktionellen ......
Benthic foraminifera as proxies to infer paleoenvironmental conditions: Case studies from Western Siberia, and the Arabian and Mediterranean Sea
(2024-01-22)
Foraminifera are among the most important microfossils and invaluable tools for geosciences. Because of their small size and abundance, foraminifera are widely involved in applied studies where they are used for age-dating, ...
Non-Reversible Markov-Chain Monte Carlo: Theoretical Foundations and Applications in Molecular Simulation
(2024-01-29)
The overarching objective of this doctoral thesis is the development of a rigorous paradigm for molecular simulation based on non-reversible Markov-chain Monte Carlo (MCMC) algorithms. The numerical exploration of the ......
Das Cyclodepsipeptid FR900359: Ein Insektizid mit neuem Wirkmechanismus aus Cand. Burkholderia crenata und Chromobacterium vaccinii
(2024-01-16)
Sekundärmetabolite (SM) sind für ihr breites Spektrum an Bioaktivitäten bekannt und daher eine wichtige Quelle für neue Arzneimittelkandidaten. Neben ihrer Relevanz für die Therapie von Erkrankungen sind SM und ihre ......
The cyclic depsipeptide FR900359: An insecticide with a novel mode of action from Cand. Burkholderia crenata and Chromobacterium vaccinii
Secondary metabolites (SM) are known for their broad spectrum ......
The cyclic depsipeptide FR900359: An insecticide with a novel mode of action from Cand. Burkholderia crenata and Chromobacterium vaccinii
Secondary metabolites (SM) are known for their broad spectrum ......
Pulsar Scintillation and Interstellar Lenses
(2024-01-29)
The radio emission of pulsars is scattered within the interstellar medium due to variations of the electron column density. Pulsars are very compact sources of pulsed radiation and, thus, emit spatially coherent radiation ...