Search results for "Ash"
showing 10 items of 1718 documents
Regio- and stereo-selectivity in the intramolecular quenching of the excited benzoylthiophene chromophore by tryptophan
2000
Laser flash photolysis studies on the photobehaviour of a series of bichromophoric derivatives bearing benzoylthiophene and tryptophan groups have shown that the efficiency of the intramolecular quenching process depends on both the stereochemistry of the chiral centers and the relative ketone versus tryptophan orientation. Perez Prieto, Julia, Julia.Perez@uv.es
Child Protection in Mediterranean Countries: Italy and Greece
2023
Abstract This chapter explores the child protection systems in Italy and Greece. Both countries have to deal with immigrant children due to the conflict between the rights of minors and immigration laws on control and defense. In Italy, the child protection system is the result of a patchwork of norms and regulations addressing different societal demands and pressures. Family and cash-transfers are fundamental factors in Italy’s child welfare system. Greece, on the other hand, has adopted fragmented measures and policies connected with financial benefits, income support, social security, social care for disabled people, and rehabilitation for children at risk. The chapter also notes how the…
Attempt on the Life of the King Alexander I in Marseille – Circumstances – Organizers – Consequences. Analysis of the Problem
2018
The main goal of this paper is to present the circumstances of an attempt on the life of the King Alexander I Karađorđevic, who was killed by terrorists from Macedonian organization VMRO in 1934, during his official visit in France. The author indicated that many researchers were focused mainly on the following questions: who were the organizers and co-organizers of the assassination attempt? What was the goal of terrorists: assassination of the King of Yugoslavia or assassination of Louis Barthou, minister of foreign affairs of France? On the other hand, the author of this paper presented a thesis that the attack in Marseille was unquestionably a terrorist act of combined forces of Croatia…
Introduction to Designing and Deploying Advanced Knowledge Systems Minitrack
2015
The objective of this minitrack is to contribute to the body of knowledge that helps academics and practitioners to design, deploy and evaluate advanced knowledge systems, explore and leverage appropriate project management methods and tools for designing and deploying knowledge systems, and study changing organizational knowledge processes and structures.
Effect of sperm concentration and storage temperature on goat spermatozoa during liquid storage
2020
The use of cooled semen is relatively common in goats. There are a number of advantages of cooled semen doses, including easier handling of artificial insemination (AI) doses, transport, more AI doses per ejaculate, and higher fertility rates in comparison with frozen AI doses. However, cooled semen has a short shelf life. The objective of this study was to examine the effect of temperature and sperm concentration on the in vitro sperm quality during liquid storage for 48 h, including sperm motility and kinetics, response to oxidation, mitochondrial membrane potential (MMP) and DNA fragmentation in goats. Three experiments were performed. In the first, the effects of liquid preservation of …
Reply to the “Comment by Delmelle et al. (2013) on ‘Scavenging of sulfur, halogens and trace metals by volcanic ash: The 2010 Eyjafjallajökull erupti…
2014
Abstract With this short communication we address the principal issues raised by Delmelle et al. (2014) in relation to the work of Bagnato et al. (2013) concerning the 2010 eruption of Eyjafjallajokull, Iceland. The principal conclusions of the work of Bagnato et al. (2013) include the observation that protracted gas-aerosol interaction in the plume promotes selective leaching of cation species from ash, with alkalis and Ca (and, among trace elements, Zn and Cu) being more rapidly re-mobilized (and transferred to soluble surface salts) relative to more inert elements (Mg, Ti). They also observed that adsorption onto ash surfaces is a major atmospheric sink of volcanic acidic gases, with 282…
Icone gay: tra processi di normalizzazione e di resistenza. Ricostruire la semantica degli hashtag
2018
The mediatization of emotions emerges as an affordance of social media, the study of which involves paying attention to digital practices and the formation of the sense of public affection, of connected audiences expressing their participation through expressions of sentiment. This happens both for the great events and for the daily demonstrations of support or of its negation. Here we choose to analyze the tweets in which the fans express their opinions on the participation in the reality shows of their “icons”: Vladimir Luxuria and Cristiano Malgioglio. To reconstruct the hashtag semantics we use: the NodeXL software for network analysis and Iramuteq for the extraction of lexical worlds.
Large Scale Knowledge Matching with Balanced Efficiency-Effectiveness Using LSH Forest
2017
Evolving Knowledge Ecosystems were proposed to approach the Big Data challenge, following the hypothesis that knowledge evolves in a way similar to biological systems. Therefore, the inner working of the knowledge ecosystem can be spotted from natural evolution. An evolving knowledge ecosystem consists of Knowledge Organisms, which form a representation of the knowledge, and the environment in which they reside. The environment consists of contexts, which are composed of so-called knowledge tokens. These tokens are ontological fragments extracted from information tokens, in turn, which originate from the streams of information flowing into the ecosystem. In this article we investigate the u…
Hydromechanical behaviour of a volcanic ash
2013
This paper presents experimental analysis and numerical modelling aimed at improved understanding and prediction of the hydromechanical behaviour of volcanic ash at various states of saturation. Results from a comprehensive experimental programme are presented in order to characterise the response of the material in terms of matric suction and confining stress changes. The evolution of the yield stress at different suction levels has been quantified. The volumetric response with suction variations allowed the analysis of the collapse-upon-wetting behaviour. Water retention and permeability are also addressed. Tests results are used to calibrate a constitutive model based on the effective s…
Ethane-Bridged Zinc-Porphyrin Dimers in Langmuir-Shäfer Thin Films: Structural and Spectroscopic Properties
2006
This work reports on the structural and spectroscopic properties of ethane-bridged Zn porphyrin dimers (1) in Langmuir-Scha¨fer (LS) thin films by combining scanning force microscopy (SFM) with film balance, UV-vis absorption, fluorescence, and nanosecond laser flash photolysis measurements. Results show that depending on the surface pressure the Langmuir films of pure 1 can be arranged in two different condensed phases, whereas SFM of the LS films shows characteristic fractal networks constituted by nanoscopic aggregates. The spectral findings agree with a picture in which 1 is apparently present in the anti conformation but aggregated in a sort of H-type structure whose optical features r…