Structure and IR Spectra of 3(5)-Aminopyrazoles and UV-induced tautomerization in argon matrix

The prototropic tautomerism in 3(5)-aminopyrazoles was investigated by matrix isolation infrared (IR) spectroscopy, supported by DFT(B3LYP)/6-311++G(d,p) calculations. In consonance with the experimental data, the calculations predict tautomer 3-aminopyrazole (3AP) to be more stable than the 5-aminopyrazole (5AP) tautomer (calculated energy difference: 10.7 kJ mol−1 ; Gibbs free energy difference: 9.8 kJ mol−1 ). The obtained matrix isolation IR spectra (in both argon and xenon matrices) were interpreted, and the observed bands were assigned to the tautomeric forms with help of vibrational calculations carried out at both harmonic and anharmonic levels. The matrix-isolated compound (in argon matrix) was then subjected to in situ broadband UV irradiation (λ > 235 nm), and the UV-induced transformations were followed by IR spectroscopy. Phototautomerization of the 3AP tautomer into the 5AP form was observed as the strongly prevalent reaction.UI0313B/QUI/2020, UI0313P/QUI/2020info:eu-repo/semantics/publishedVersio

A MSFD complementary approach for the assessment of pressures, knowledge and data gaps in Southern European Seas : the PERSEUS experience

PERSEUS project aims to identify the most relevant pressures exerted on the ecosystems of the Southern European Seas (SES), highlighting knowledge and data gaps that endanger the achievement of SES Good Environmental Status (GES) as mandated by the Marine Strategy Framework Directive (MSFD). A complementary approach has been adopted, by a meta-analysis of existing literature on pressure/impact/knowledge gaps summarized in tables related to the MSFD descriptors, discriminating open waters from coastal areas. A comparative assessment of the Initial Assessments (IAs) for five SES countries has been also independently performed. The comparison between meta-analysis results and IAs shows similarities for coastal areas only. Major knowledge gaps have been detected for the biodiversity, marine food web, marine litter and underwater noise descriptors. The meta-analysis also allowed the identification of additional research themes targeting research topics that are requested to the achievement of GES. 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license.peer-reviewe

Transparent model concrete with tunable rheology for investigating flow and particle-migration during transport in pipes

The article describes the adaption and properties of a model concrete for detailed flow studies. To adapt the yield stress and plastic viscosity of the model concrete to the corresponding rheological properties of real concrete, the model concrete is made of a mixture of glass beads and a non-Newtonian fluid. The refractive index of the non-Newtonian fluid is adjusted to the refractive index of the glass beads by the addition of a further constituent. The rheological properties of the model concrete are characterised by measurements in concrete rheometers. Finally, the first exemplary results from experiments with the model concrete are presented, which give incipient impressions of the complex internal dynamics in flowing concrete

Distribution of the Sediment Fill and Associated Pollutants in Băbeni Reservoir, Olt River, Vâlcea, Romania

Babeni reservoir is situated on the Olt River, near the chemical platform Rm.Valcea. A large amount of sediments has been deposited since the dam building, 30 years ago. A great role was played by the tributaries Bistriţa and Topolog that flow into Băbeni reservoir. Both rivers built important deltas filling the reservoir. Grain-size distribution is in accordance with the evolution of the filling process. Most sediments present great concentrations of heavy metals. The mercury stands out with very high values, up to 8 μg/g. Other metals with concentrations higher than the norms are Ni, Cu and Cr. Cleaning the site is an expensive challenge

A model of 'contested' Europeanization: the European Union and the Turkish-Cypriot administration

This article investigates the European Union’s (EU) relevance to the Turkish-Cypriot (TC) administration, pegged to the Europeanization debate. The study contributes to the discussion on Europeanization and the EU’s international role, especially in cases of contested states, which constitute an important element of the EU’s current global agenda but remain an under-researched topic. The argument advanced is that the Europeanization of the TC administration, although similar to previous cases of EU Enlargement, is importantly mediated by the conditions of contested statehood that exist in northern Cyprus. In this respect, the TC example holds strong comparative value for the study of Europeanization of contested states and the wider debate on international role of the EU, in variety of contexts and in relation to a diverse range of actors, beyond conventional states that dominate discourse

An overview of RILEM TC MRP round-robin testing of concrete and mortar rheology in Bethune France, May 2018

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