Absence and presence Organic and Inorganic Inhibitors

The aggressive effect of different concentrations of HNO3 and the inhibitive action of some organic and inorganic additives on the corrosion of copper metal have been studied by thermometric technique. The rate of metal dissolution increases with acid concentration. The copper dissolution rate in 2M HNO3 was dependent on the chemical properties and concentration of the used additives. The inhibitive action of these compounds obey the Langmuir adsorption isotherm. The degree of surface coverage (?) of adsorbed organic and inorganic additives was determined from the reaction number (R.N.) values. The thermodynamic parameters Kads. and ?G?ads. of organic additives are calculated and illustrated. The values of ?G?ads. clear strong physisorption of the tested organic inhibitors on copper metal surface. Keywords: Copper; Acid Corrosion; Passivity; Thermometry

A cryogenic surface-electrode elliptical ion trap for quantum simulation

Two-dimensional crystals of trapped ions are a promising system with which to implement quantum simulations of challenging problems such as spin frustration. Here, we present a design for a surface-electrode elliptical ion trap which produces a 2-D ion crystal and is amenable to microfabrication, which would enable higher simulated coupling rates, as well as interactions based on magnetic forces generated by on-chip currents. Working in an 11 K cryogenic environment, we experimentally verify to within 5% a numerical model of the structure of ion crystals in the trap. We also explore the possibility of implementing quantum simulation using magnetic forces, and calculate J-coupling rates on the order of 10^3 / s for an ion crystal height of 10 microns, using a current of 1 A

Traitement des incertitudes des avis à dire d'expert pour l'évaluation de la sûreté des digues

3rd European Conference on Flood Risk Management FLOODrisk 2016, Lyon, FRA, 17-/10/2016 - 21/10/2016International audienceIn France, levees remain most of the time badly maintained; these long linear structures show signs of weaknesses on numerous occasions. Only incomplete information is usually available. The general lack of data describing the behaviour of the infrastructure during unwanted events led to estimate their safety mainly from expert judgement. Thus the ability of the expert to predict the level of functioning of an infrastructure for a type of hazard and its intensity is crucial. An error of judgement can have very serious consequences and the production of reliable information requires the ability of the expert to report accurately the uncertainties in its estimations, as well as associated confidence. In order to meet this need, our research within Incertu project (French Ministry of Ecology funding) aims to produce relevant scientific approaches and tools for the collection and processing reliable experts'statements or combined with a confidence level in the context of uncertain information and input data

pH Assist for Highly selective determination of Xipamide by the enhancement of the green emission of Tb3+ optical sensor

The highly selective, accurate method for determination of Xipamide was maintained. The method depends on the enhancement of the green emission band of Tb3+ at 545 nm in the presence of different concentration of  Xipamide at pH 4.1 and λex = 320 nm in acetonitrile. The photophysical properties of the green  emissive Tb3+  complex have been elucidated, the terbium was used as optical sensor for the assessment of  Xipamide in the pharmaceutical tablets and body fluids with a concentration range 5.0 ×10−9 – 2.3 ×10−6 mol L−1 of xipamide, correlation coefficient of 0.995 and  detection limit of 8.5 ×10−10 mol L−1

Cardiac sarcoma presenting with abdominal pain and mimicking myxoma on echocardiogram

Cardiac sarcoma’s are highly aggressive tumours. Clear resection margins ± autotransplant, followed by chemotherapy, offers the best survival chance. Therefore, frozen section should be preformed when there is ambiguity in diagnosis