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Inelastic Neutron Scattering and Density Functional Theory- Molecular Dynamics Study of Si Dynamics in Ti3SiC2

Observed differences between measured and calculated elastic constants for Ti3SiC2 are investigated using Density Functional Theory and Inelastic Neutron Scattering. The agreement between the calculated lattice dynamics and the dynamics measured by inelastic neutron scattering is considered good except at energies below similar to 20meV where discrepancies suggest anharmonic potentials. This sugge

Cross-linking cellulose nanofibrils for potential elastic cryo-structured gels

Cellulose nanofibrils were produced from P. radiata kraft pulp fibers. The nanofibrillation was facilitated by applying 2,2,6,6-tetramethylpiperidinyl-1-oxyl-mediated oxidation as pretreatment. The oxidized nanofibrils were cross-linked with polyethyleneimine and poly N-isopropylacrylamide-co-allylamine-co-methylenebisacrylamide particles and were frozen to form cryo-structured gels. Samples of th

Distribution of the maximum in air pollution fields

Air quality standards are set to protect public health. The values of the standards are often based on health effect studies, without any statistical considerations. In order to judge if a standard is met measurements of ambient air quality are taken at monitoring stations, and these measured values are used to decide whether or not the standard has been violated. In this paper we examine the stat

Nerve compression induces activating transcription factor 3 in neurons and Schwann cells in diabetic rats.

Expression of transcription factor ATF3 in sensory neurons in dorsal root ganglion and in Schwann cells in sciatic nerve of diabetic (BB and Goto-Kakizaki rats; experimental models of types 1 and 2 diabetes, respectively) and healthy rats were examined by immunocytochemistry after nerve compression (silicone tube) for 3, 6 or 14 days. ATF3-stained sensory neurons in dorsal root ganglia and Schwann

Moraxella catarrhalis: from interactions with the host immune system to vaccine development.

Moraxella catarrhalis is a human-restricted commensal that over the last two decades has developed into an emerging respiratory tract pathogen. The bacterial species is equipped with various adhesins to facilitate its colonization. Successful evasion of the human immune system is a prerequisite for Moraxella infection. This strategy involves induction of an excessive proinflammatory response, inte

Succinate:quinone oxidoreductase in the bacteria Paracoccus denitrificans and Bacillus subtilis.

An overview of the present knowledge about succinate:quinone oxidoreductase in Paracoccus denitrificans and Bacillus subtilis is presented. P. denitrificans contains a monoheme succinate:ubiquinone oxidoreductase that is similar to that of mammalian mitochondria with respect to composition and sensitivity to carboxin. Results obtained with carboxin-resistant P. denitrificans mutants provide inform

Air Pollutants

Abstract in UndeterminedPollutants in the air can be in gaseous and particle (solid and liquid) phases. Interactions between these phases occur. The components are emitted to the air by different source mechanisms such as evaporation, disintegration of bulk material and chemical reactions. The significance of different transport mechanisms is, for airborne particles, dependent on the aerodynamic p

Cytokine responses during mucosal infections: role in disease pathogenesis and host defence

Mucosal pathogens use diverse and highly specific molecular mechanisms to activate mucosal inflammation. It may even be argued that their virulence depends on the inflammatory response that they induce. Some bacteria target epithelial cells and trigger them to produce inflammatory mediators but others cross the mucosa and activate macrophages or dendritic cells. Although systemic release of inflam

Preparation of molecularly imprinted polymers in supercritical carbon dioxide

Molecularly imprinted polymer nanoparticles were prepared in supercritical carbon dioxide using a noncovalent imprinting approach. In the present work, propranolol was used as a model template, methacrylic acid as a functional monomer, and divinylbenzene as a crosslinker. Under a high dilution condition, the heterogeneous polymerization resulted in discrete crosslinked polymer nanoparticles. Compa

Caudate nucleus dopamine D-2 receptors in vascular dementia

Caudate nucleus dopamine (DA) D-2 receptors were studied in patients with vascular dementia (VaD) and in a control group using [H-3]raclopride as a radioligand. There was no significant difference in the number of DA D-2 receptors in the VaD group as compared with controls. The binding affinity was significantly lower in the VaD group. When the VaD group was subdivided into subjects with or withou

Impact related changes in mineral properties: Ti-magnetite from basaltic rocks at Lonar crater, India

Samples from vesicular Lonar impactite have been investigated by Mossbauer spectroscopy and SEM in combination with elemental analysis. Observation reveal the new-formation of oxide minerals have occurred with nucleation in particular at the walls of the vesicles interpreted as having formed from condensation of the gas phase having caused the vesicles to form in the first place. Elemental analysi

MicroRNAs in the failing heart - Novel therapeutic targets?

Abstract Heart failure is a common and disabling disease with high mortality that carries substantial societal costs. Current therapeutic strategies are aimed at relieving symptoms, avoiding hospitalization, and prolonging life, but disease progression is ultimately inevitable. MicroRNAs (miRNAs) are short, non-coding RNA molecules with pervasive roles in eukaryotic biology, annealing to complimen

Beyond the legacy of the Enlightenment? Online encyclopaedias as digital heterotopias

This article explores how we can understand contemporary participatory online encyclopaedic expressions, particularly Wikipedia, in their traditional role as continuation of the Enlightenment ideal, as well as in the distinctly different space of the Internet. Firstly we position these encyclopaedias in a historical tradition. Secondly, we assign them a place in contemporary digital networks which