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Coronene is a highly symmetric organic molecule whose molecular structure resembles a fragment of graphite. We have crystallized a charge-transfer complex based on coronene and TCNQ, and present crystal structure and transport properties. The complex adopts alternate stacking between coronene and TCNQ and the charge-transfer was estimated to be of the order of 0.3 by the structure and IR analysis
BACKGROUND : Recruitment and activation of eosinophils have been studied intensely in asthma and other allergic diseases. Less is known about the infiltration and behaviour of eosinophils during gastric ulcer healing. AIM : To examine the tissue infiltration and activation of eosinophils in the ulcer margin at different time points after ulcer induction (days 1-15). METHODS : Eosinophil peroxidase
The influence of external vibrations on the frictional force has been studied, using different frequencies, amplitudes, loads and materials. The results show that it is possible to affect the frictional force between two surfaces in contact through vibration. The frictional force can be weakened chiefly through a separation of the surfaces or strengthened by welding phenomena in the contact surfa
Quaternary glacial stratigraphy and relative sea-level changes reveal at least two glacial expansions over the Chelyuskin Peninsula, bordering the Kara Sea at about 77°N in the Russian Arctic, as indicated from tills interbedded with marine sediments, exposed in stratigraphic superposition, and from raised beach sequences mapped to altitudes of at least up to ca. 80 m a.s.l. Chronological control
The complexation of sulfate ions at the goethite-water interface has been studied by equilibrium measurements at 298.2 +/- 0.5 K and by infrared spectroscopy. A unified set of data from potentiometric titrations and batch adsorption experiments were evaluated according to an extended Constant Capacitance Model. The obtained equilibrium model consists of two outer-sphere complexes: = FeOH2+, SO42-
In trying to understand why archaeology is so strongly associated with the method of excavation, this paper examines different relationships between excavation, archaeology, archaeologists and modern society.
Amyloid plaques and neurofibrillary tangles (NFTs) in the brain are the neuropathological hallmarks of Alzheimer's disease (AD). Amyloid plaques are composed of β-amyloid peptides (Aβ), while NFTs contain hyperphosphorylated tau proteins. Patients with familial AD who have mutations in the amyloid precursor protein (APP) gene have either increased production of Aβ or generate more aggregation-pron
Dietary sphingomyelin (SM) undergoes sequential cleavage to ceramide and sphingosine in the intestine. A distinctive intestinal sphingomyelinase (SMase) with alkaline pH-optimum was earlier identified by us. The activity was highest in middle and lower small intestine, but its role in SM digestion has not been clarified. In this study we examined the extension and capacity of SM digestion in vivo.
Shear banding in sand is an emergent fine-scale mechanism whose characteristic length scale is only a few particles. X-ray scanning a sand specimen under loading allows the analysis of the kinematics of individual grains and grain contacts during deformation. This paper summarises results from one such test performed on Hostun sand, and discusses some key issues that must be addressed in order to
In the debate surrounding genetically modified (GM) food, intense controversies pertain over whether, or how, GM food products ought to be labelled. This paper examines how the GM-supportive and GM-sceptical alliances use arguments regarding labelling so as to strengthen their respective positions. It is an examination of conflicting arguments across social coalitions, corporations and policy-make
In this chapter we emphasize the importance of recognizing the interdependence among exchange rates, interest rates and inflation rates in measuring corporate exposure. First, several issues relating to management’s views of the macroeconomic environment, as well as the firm’s objective and structure will be discussed. These issues must be addressed before multiple regression analysis can be imple
Various aspects of the strong interaction are considered. Correlation effects in the hadronization process in a string model are studied. A discrete approximation scheme to the perturbative QCD cascade in e+ e- annihilation is formulated. The model, Discrete QCD, predicts a rather low phase space density of "effectlve gluons". This is related to the properties of the runnin
The Sustainable Development Goals (SDGs) with their 169 targets and 231 indicators epitomise the trend of global governance by numbers. This article suggests the notion of a global “indicator reporting trajectory” that is shaped by three main elements: the politics of indicators, a reporting infrastructure and indicator advocacy. I propose that indicator reporting trajectories may result either in
