The a-C:H (amorphous carbon-hydrogen) films belong to the family of DLC (diamond-like carbon) coatings. The a-C:H coating was deposited on medical grade CoCrMo substrates by plasma-assisted chemical vapor deposition (PA-CVD) using benzene as gaseous precursor. Benzene offers an aromatic structure, which...
Tandem-Absorberstrukturen bestehend aus ternären III-V-Halbleiter-Nanodrähten (ND) als obere Teilzellen und Si als untere Teilzelle besitzen ein hohes Potential für kostengünstige, hocheffiziente Photovoltaik und solare Wasserspaltung. Ziel dieser Arbeit ist es den Weg zu einem solchem Tandem zu ebnen,...
As a low-cost, non-volatile, highly polar and chemically stable solvent, sulfolane has a high implementation potential for electroplating in organic media. This is the first report of the electrodeposition of silicon from sulfolane-based electrolytes. Voltammetric and chronoamperometric techniques, coupled...
The pea aphid (Acyrthosiphon pisum) is a complex of at least 15 genetically different host races that are native to specific legume plants but can all develop on the universal host plant Vicia faba. Despite much research, it is still unclear why pea aphid host races can accept and colonize their native...
In recent years, great efforts can be observed in the community of optical design to use the additional degrees of freedom afforded by freeform surfaces in optical systems. In particular one important question at the beginning of the concept and design of a freeform system is the decision how to mathematically...
Land cover datasets are essential for modeling Arctic ecosystem structure and function and for understanding land–atmosphere interactions at high spatial resolutions. However, most Arctic land cover products are generated at a coarse resolution, and finding quality satellite remote sensing datasets to...
Wood plastic composite (WPC) is an important representative of the group of natural fibre reinforced plastics. In order to bond the polar wood fibres chemically to the nonpolar polymer matrix, coupling agents are used. The most important group of coupling agents for WPC are maleated polyolefins in which...
NADPH:protochlorophyllide oxidoreductase (POR), EC 1.3.1.33, is a key enzyme in the biosynthesis of chlorophyll in all organisms with oxygenic photosynthesis. POR catalyzes the reduction of protochlorophyllide (PChlide) to chlorophyllide (Chlide) by the absorption of light in the presence of the cofactor...
The properties of a microphone are significant for the quality of the
recording and transmission of an acoustic signal. This report presents
possibilities for influencing the linear and the spacial characteristics of
microphones with digital signal processing. The first step for this is the
analog...
All terrestrial plants are covered by cuticle and its most outer layer is called epicuticular waxes (EWs). This layer forms an actual leaf surface, therefore is a first line of defence against any environmental stress. Despite its crucial role in plant survival, for decades leaf surface was studied...
Eine Reihe neuer und funktioneller Chromophore/Fluorophore auf der Basis von 4-Hydroxy-1,3-thiazolen wurde synthetisiert. Aus diesem Portfolio an Derivaten wurden Anwendungen entwickelt und die Verbindungen hinsichtlich ihrer Verwendung als Sensoren und Antioxidantien evaluiert. Innerhalb des Bereichs...
Indium nitride (InN) is a III-V semiconductor and due to its low band gap
and good electron transport properties a promising candidate for
applications in ultrafast transistor and optoelectronic devices. In this
context, not only the bulk but also the surface properties of the material
are of major...
The modification of C60 and its derivatives with polar side chains to
improve the solubility in polar and aqueous medium is of significant
importance for biological and medical applications. Although fullerene
derivatives have been used in numerous biological systems their interaction
mechanism...
The Arctic Ocean is an area of increasing interest for research. Variations in the sensitive polar ecosystem influence the environment of the global Earth system and climate change. Therefore, reviews of modern Arctic Ocean system thereby provide the basis to interpret the Arctic Ocean evolution through...
Diese Arbeit widmet sich dem Thema der Gammastrahlen-Bursts (GRBs), einem der z.Z. faszinierendsten Forschungsfelder in der Astrophysik. Gammastrahlen-Bursts sind Blitze energiereicher Strahlung, die am Himmel aus zuf¨alligen Richtungen zu zuf¨alligen Zeiten kommen. W¨ahrend ihres Auftretens ¨uberstrahlen...