The edge states and optical transition energies in carbon nanoribbons are investigated with density-functional calculations. While the ground state of zigzag ribbons is spin polarized, defects at the edges destroy spin polarization and lead to a nonmagnetic ground state. Scanning tunneling spectroscopy will thus show different features depending on edge quality. Optical transition energies in n...

Enterprise Information Integration (EII) is “the integration of data from multiple systems into a unified, consistent and accurate representation”. One of the main requirements of EII is to get for each “thing of interest” one central information access point. But existing approaches fail caused by the absence of a semantic theory. Topic Maps are best suited for the management of large amounts ...

This paper presents a deceptively straightforward experimental approach to monitoring membrane protein-ligand interactions in vesicles and in living Escherichia coli cells. This is achieved via the biosynthetic incorporation of 7-azatryptophan, a tryptophan analogue with a red-shifted absorption spectrum, allowing collection of the emission signal of the target protein in a high tryptophan back...

We have identified and characterized the D-xylose transport system of Lactobacillus pentosus. Uptake of D-xylose was not driven by the proton motive force generated by malolactic fermentation and required D-xylose metabolism. The kinetics of D-xylose transport were indicative of a low-affinity facilitated-diffusion system with an apparent K(m) of 8.5 mM and a V(max) of 23 nmol min(-1) mg of dry...

The aim of the present study was to examine (a) if athletes’ moral judgment is affected by sport type, the level of competition – in terms of the league in which one competes – and regular playing position, and (b) possible relations between moral judgment and the overall years of athletic experience, self-perception of sport ability, and achievement goal orientations. The sample comprised 170 ...

The phosphoenolpyruvate:sugar phosphotransferase system (PTS) is the major carbohydrate transport system in oral streptococci. The mannose-PTS of Streptococcus mutans, which transports mannose and glucose, is involved in carbon catabolite repression (CCR) and regulates the expression of known virulence genes. In this study, we investigated the role of EII(Glc) and EIIAB(Man) in sugar metabolism...

Spiroplasma citri is a plant-pathogenic mollicute phylogenetically related to Gram-positive bacteria. Spiroplasma cells are restricted to the phloem sieve tubes and are transmitted from plant to plant by the leafhopper vector Circulifer haematoceps. In the plant sieve tubes, S. citri grows on glucose and fructose, whereas in the leafhopper haemolymph the spiroplasma must grow on trehalose, the ...

anxiety disorders are a group of psychiatric disorders which can have negative effects on the human life. children and adults can have anxiety disorders and these disorders can lead to secondary problems such as cognitive, perceptual, emotional and behavioral problems. for treatment of anxiety, the practitioners and psychologists can apply psychotherapy approaches such as: cognitive therapy, ge...