Search results for "solution"

Behaviour of Nb2O5/PPy contacts: From Schottky barriers to p-n junctions

2009

In this work, a study of the photoelectrochemical responses of Nb O /PPy contacts fabricated in both organic 2 5 and aqueous solutions is performed. From the comparison between the experimental data of PPy photodeposited on Nb O in organic and in aqueous solutions, it is evident that the medium used for the photodeposition 2 5 influences the absorption coefficient, the band gap and flat band potential values.

A glassy carbon electrode modified by a triply-fused-like Co( ii ) polyporphine and its ability for sulphite oxidation and detection

2018

This article presents a Co(II) polyporphine conductive polymer easily and rapidly obtained (less than 2 h 30 min) on the surface of a glassy carbon electrode from the transformation of an initial Mg(II) porphine solution in a four-step process (including electrochemical and chemical stages). The intimate molecular structure is argued on the basis of the electrochemical response of the modified electrode, as well as its surface characterization. Owing to its apparent stability in water over potential cycling and its high density in active Co(II) centers, the electrosynthesized film shows its ability to catalyze sulphite oxidation in aqueous solutions. The mechanism of this molecular catalysi…

Auto calibration of a cone-beam-CT

2012

Purpose: This paper introduces a novel autocalibration method for cone-beam-CTs (CBCT) or flat-panel CTs, assuming a perfect rotation. The method is based on ellipse-fitting. Autocalibration refers to accurate recovery of the geometric alignment of a CBCT device from projection images alone, without any manual measurements. Methods: The authors use test objects containing small arbitrarily positioned radio-opaque markers. No information regarding the relative positions of the markers is used. In practice, the authors use three to eight metal ball bearings (diameter of 1 mm), e.g., positioned roughly in a vertical line such that their projection image curves on the detector preferably form l…

Mediation and Private International Law: Improving Free Circulation of Mediation Agreements Across the EU

2016

This paper, commissioned by the European Parliament’s Policy Department for Citizens’ Rights and Constitutional Affairs upon request by the JURI Committee, examines the issues arising in the context of cross-border mediation. Cross-border litigation has increased steadily in recent years in Europe as a consequence of the consolidation of the European unification process. The enactment of Directive 2008/52/EC has certainly led to the presence of mediation legislation in the EU Member States. But many important differences can still be ascertained in relation to the legal framework developed, which affect key aspects of mediation. For mediation to obtain full endorsement by citizens in the fu…

Résolution de conflits au collège " Volonté de résoudre pacifiquement les conflits " chez des élèves en fin de troisième : entre contexte et effet-ét…

2011

L'auteur a été rattaché à l'IREDU entre la rédaction de cette communication et sa présentation au colloque.; Trois cent élèves de troisième ont été interrogés sur leur " volonté de résoudre pacifiquement les conflits ", selon la terminologie du socle commun. La violence que génèrerait les situations proposées par l'enquête dépend non seulement de ces dernières, mais encore du cadre, scolaire ou non scolaire, dans lequel elles sont présentées. La fréquence des réactions violentes est également liée au genre et à la catégorie socioprofessionnelle des élèves. Elle est enfin dépendante de l'effet-établissement, expliquant presque 5 pour cent de la variance des scores. Quoi que pouvant être part…

Examination Technique of Confocal Laser Endomicroscopy

2007

The first publication about a confocal fluorescence microscope integrated into the distal tip of a conventional colonoscope (Pentax EC 3830FK, Tokyo, Japan) appeared in 2004 [1], showing that in vivo microscopy at subcellular resolution (0.7 µm) simultaneously displayed with white-light endoscopy had become possible. Today, endomicroscopy can be performed in the upper and lower GI tract [2]–[10]. This chapter deals with the examination technique of confocal laser endomicroscopy.

1136 In Vivo Endoscope-Based Confocal Laser Endomicroscopy (eCLE) Improves Detection of Unlocalized Barrett's Esophagus-Related Neoplasia Over High R…

2012

A density functional theory evaluation of hydrophobic solvation: Ne, Ar and Kr in a 50-water cluster – Implications for the hydrophobic effect

2012

The physical explanation for the hydrophobic effect has been the subject of disagreement. Physical organic chemists tend to use a explanation related to pressure, while many biochemists prefer an explanation that involves decreased entropy of the aqueous solvent. We present DFT calculations at the B3LYP/6-31G(d,p) and X3LYP/6-31G(d,p) levels on the solvation of three noble gases (Ne, Ar, and Kr) in clusters of 50 waters. Vibrational analyses show no substantial decreases in the vibrational entropies of the waters in any of the three clusters. The observed positive free energies of transfer from the gas phase or from nonpolar solvents to water appear to be due to the work needed to make a su…

Long-chain fatty acyl-CoA esters induce lipase activation in the absence of a water-lipid interface.

2003

In most lipases a mobile element or lid domain covers the catalytic site of the enzyme and the lid opening event, which usually proceed at a lipid-water interface, is required to form the catalytically competent lipase. We report here a noticeable increase in activity of two fungal lipases assayed in aqueous solution in absence of any interface when adding submicellar concentrations of amphipathic physiological molecules like long-chain acyl-CoAs. The catalytic activity was dramatically dependent on the acyl chain length of the amphiphile and could be related with a lid-opening process. Our data support that lipase activation can be triggered in the absence of a well-defined interface, and …

On Severi Type Inequalities for Irregular Surfaces

2017

Let X be a minimal surface of general type and maximal Albanese dimension with irregularity q ≥ 2. We show that K2 X ≥ 4χ(OX) + 4(q − 2) if K2 X < 9 2 χ(OX), and also obtain the characterization of the equality. As a consequence, we prove a conjecture of Manetti on the geography of irregular surfaces if K2 X ≥ 36(q−2) or χ(OX) ≥ 8(q−2), and we also prove a conjecture that the surfaces of general type and maximal Albanese dimension with K2 X = 4χ(OX) are exactly the resolution of double covers of abelian surfaces branched over ample divisors with at worst simple singularities.