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Socio-cultural dynamics in spatial policy: explaining the on-going success of cluster politics
(2013)
Since the 1980’s, against the backdrop of global warming and the decline of conventional energy resources, low emission and renewable energy systems have gotten into the focus of politics as well as research and development. In order to decrease the emission of greenhouse gases Germany intents to generate 80% of its electrical energy from renewable and low emission sources by 2050. For low emission electricity generation hydrogen operated fuel cells are a potential solution. However, although fuel cell technology has been well known since the 19th century cost effective materials are needed to achieve a breakthrough in the market.
Proton Exchange Membrane Fuel Cells with Carbon Nanotubes as Electrode Material
At the Westphalian Energy Institute of the Wesphalian University of Applied Sciences one main focus is on the research of proton exchange membrane fuel cells (PEMFC). PEMFC membrane electrode assemblies (MEA) consist of a polymer membrane with electrolytic properties covered on both sides by a catalyst layer (CL) as well as a porous and electrical conductive gas diffusion layer (GDL).
For PEMFC carbon nanotubes (CNT) have ideal properties as electrode material concerning electrical conductivity, oxidation resistance and media transport. CNTs are suitable for the use as catalyst support material within the CL due to their large surface in comparison to conventional carbon supports. Furthermore, oxygen plasma treated CNTs show electrochemical activity referred to hydrogen adsorption and desorption, which has been shown by cyclic voltammetry in 0.5 M sulfuric acid solution. According to the PEMFCs anode a GDL coated with oxygen plasma activated CNTs has promising properties to significantly reduce catalyst content (e.g. platinum) of the anodic CL.
Juristische Methodenlehre
(2013)
Sparparadoxon verschärft Krise. Ökonom Heinz-J. Bontrup: Der Fiskalpakt wird sich selbst erledigen
(2013)
Work-Life-Balance
(2013)
Wissen schafft Wirtschaft
(2013)
Forschungsbericht 2012
(2013)
Vertrauen gilt als der beste "Kitt" in sozialen Beziehungen - auch innerhalb von Unternehmen. Permanentes Reorganisieren lässt jedoch in vielen Unternehmen das Vertrauen in den Wandel brüchig werden. Wie kann Changemanagement weitergedacht werden, um Vertrauen im Unternehmen zu erhalten und Vertrauen in den Wandel zu schaffen? Wie können Unternehmen in Vertrauen investieren, um tiefgreifenden Wandel nachhaltig umzusetzen? Diese Forschungsfragen stehen im Mittelpunkt dieser Veröffentlichung (Kurzfassung). Anhand von empirischen Ergebnissen aus Fallstudien und Breitenerhebungen werden Auswirkungen von tiefgreifendem Wandel in Organisationen dargestellt und Ansatzpunkte für ein Vertrauensorientiertes Changemanagement aufgezeigt
The biomodification of surfaces, especially titanium, is an important issue in current biomedical research. Regarding titanium, it is also important to ensure a specific protein modification of its surface because here protein binding that is too random can be observed. Specific nanoscale architectures can be applied to overcome this problem. As recently shown, streptavidin can be used as a coupling agent to immobilize biotinylated fibronectin (bFn) on a TiOX surface. Because of the conformation of adsorbed biotinylated fibronectin on a streptavidin monolayer, it is possible to adsorb more streptavidin and biotinylated fibronectin layers. On this basis, an alternating protein multilayer can be built up. In contrast to common layer-by-layer technology, in this procedure the mechanism of layer adsorption is very specific because of the interaction of biotin and streptavidin. In addition, we showed that the assembly of this multilayer system and its stability are dependent on the degree of labeling of biotinylated fibronectin. Hence we conclude that it is possible to build up well-defined nanoscale protein architectures by varying the degree of labeling of biotinylated fibronectin.