Search results for "ALK"
showing 10 items of 4314 documents
Multiple origins of methane in fluids circulating in the Othrys ophiolite, central Greece
2018
The complex geology of Greece includes two important parallel running ophiolitic belts. The Othrys Massif in central Greece belongs to westernmost of them. In and around this wide ophiolite outcrop, some cold hyperalkaline and some hypothermal (T < 40°C) alkaline springs are present. Thirty water samples were collected at 17 different sites and both bubbling and dissolved gases were analysed for their chemical (He, Ne, H2, O2, N2, CH4, C2H6, CO2 and H2S) and isotope (He, δ13C-CO2, δ 13C-CH4, δ 2H-CH4) composition. All samples except one have H2S contents below detection limit (10 μmol/mol), whilst H2 (from <2 to 2500 μmol/mol), CO2 (up to 26,000 but generally below 1000 μmol/mol) and …
Immediacy and distance in teacher talk—A comparative case study in German elementary- and outdoor school-teaching
2017
This case study examines authentic speech acts by a German primary school teacher in the classroom context and the outdoor learning location of a forest. The study will compare the degree of linguistic immediacy or distance in these two contexts, respectively. Once a week, the class is doing “outdoor school” [Draußenschule] in places of natural or cultural interest near to their school. The structural change in the teaching environment means a change in the communication setting. The question arises if the teacher speaks to the students differently indoors than outdoors. The theoretical reference framework for the study is provided by the linguistic model “language of immediacy and language…
Current Accounts and Coordination of Wage Bargaining
2018
This study provides novel evidence on the impact of labor market institutions on current account dynamics. Our results suggest that a high degree of coordination of wage bargaining has a positive effect on the current account balance over the long run. This result is not driven entirely by wage moderation induced by centralized wage setting. We also provide robust evidence that a high degree of coordination of wage bargaining is associated with a slower current account adjustment toward its long-run equilibrium. This result seems theoretically plausible; the aggregate shocks in the exporting sector are largely driven by idiosyncratic shocks and the presence of idiosyncratic shocks increases…
Essays on current account imbalances
2017
Global current account imbalances and intra-euro area imbalances have been at the forefront of academic and policy debates for the last ten years. This thesis examines the determinants of current account balances and external adjustment. It consists of an introduction and four empirical studies. This thesis highlights the importance of institutional factors such as differences in national cultures and cross-country differences in the coordination of wage bargaining on external balances. The first study investigates the effects of deep determinants on current account balances. The point estimates are economically and statistically significant, suggesting that countries populated by Roman Cat…
Music Performance Anxiety : Use of Coping Strategies by Tertiary Flute Players
2013
This article presents part of a master´s degree research, which focused on investigating causes, symptoms, and strategies used by tertiary flute players to cope with music performance anxiety in the performance of an unaccompanied flute work in recital of evaluative character. However, it will present only the results on strategies of twelve flute students from three music colleges in Brazil to cope with music performance anxiety. Seven of participants were male, and five were female. The procedures of collection and analyses of data occurred as in the study by Siw Nielsen (1999), that is, through the behavioral observation of the participants in the recital, and verbal reports by semi-stru…
Copolymerization of Ethylene with Selected Vinyl Monomers Catalyzed by Group 4 Metal and Vanadium Complexes with Multidentate Ligands: A Short Review
2021
This paper gives a short overview of homogeneous post-metallocene catalysts based on group 4 metal and vanadium complexes bearing multidentate ligands. It summarizes the catalytic behavior of those catalysts in copolymerization of ethylene with 1-olefins, with styrenic monomers and with α,ω-alkenols. The review is focused on finding correlations between the structure of a complex, its catalyst activity and comonomer incorporation ability, as well as the microstructure of the copolymer chains.
Regio- and Stereoselective Chloro Sulfoximidations of Terminal Aryl Alkynes Enabled by Copper Catalysis and Visible Light
2021
Advanced synthesis & catalysis 2552-2556 (2021). doi:10.1002/adsc.202100162
The first catalytic method for Heck alkynylation of unactivated aryl bromides (copper-free Sonogashira) in an ionic liquid: 1 mol-percent palladium/t…
2007
Herein we report the studies of Heck alkynylation (copper-free Sonogashira) with aryl halides (I, Br, Cl) employing various metallic precursors, tertiary phosphanes and bases in [BMIM][BF4] as the solvent. As a result, we provide the first method that allows the coupling of a large array of substrates, either activated or deactivated bromides in an ionic liquid. Furthermore, the system of highest efficiency is unexpectedly the simplest and cheaper combination that employs [Pd(η3-C3H5)Cl]2/PPh3 at only a 1 mol-% loading with pyrrolidine as the base and in the absence of a copper salt. The coupling of sterically and electronically deactivated bromides bearing different functional groups to ar…
Coppie omosessuali e tutela costituzionale
2015
Le coppie di fatto e quelle omosessuali in particolare sono da tempo una componente della società italiana. La Corte europea dei diritti dell'uomo nella sentenza Schalk and Kopf del 2010 ha riconosciuto la relazione omosessuale come una delle possibili manifestazioni della vita privata e familiare, la cui tutela è sancita dall'art. 8 Cedu. Anche la Corte costituzionale italiana ha attribuito alla relazione omosessuale la connotazione di "formazione sociale", i cui diritti inviolabili sono riconosciuti e garantiti in base all'art. 2 della Costituzione. In questo quadro, stona l'inerzia del legislatore italiano, incapace sino ad ora di disciplinare anche le semplici relazioni di fatto, indipe…