Search results for "Transit"
showing 10 items of 4210 documents
Interplay of acidity and ionic liquid structure on the outcome of a heterocyclic rearrangement reaction
2021
The study of suitable probe reactions is a powerful tool to investigate the properties of nonconventional solvents such ionic liquids (ILs). In particular, we studied the acid-catalyzed mononuclear rearrangement of heterocycles (MHR) of the Z-phenylhydrazone of 5-amino-3-benzoyl-1,2,4-oxadiazole into the relevant 1,2,3-triazole, in solution of ILs by means of kinetic measurements. We chose as solvents six ILs differing both in the cation and anion, in the presence of five carboxylic and sulfonic acids as catalysts. For a useful comparison, the reaction was also performed in 1,4-dioxane and methanol. In general, the reaction occurs faster in ILs, compared to conventional solvents, according …
Responsibilities for just transition to low-carbon societies : a role-based framework
2022
Low-carbon transitions in industrialised societies will have significant social, economic and environmental impacts, raising concerns of justice. Calls for urgent transitions evoke a question about the roles of different actors in advancing transitions and ensuring they are just. While the responsibilities for emission mitigation have been long discussed, responsibilities for making a just transition have not. The question about responsibilities is particularly pressing because of the diverse constellation of actors involved in climate action, including diverse forms of non-state actors from city-level and business alliances to grassroots activists. We examine the responsibilities of state …
Administration of care to older patients in transition from hospital to home care services: Home nursing leaders' experiences
2013
Published version of an article in the journal: Journal of Multidisciplinary Healthcare. Also available from the Publisher at: http://dx.doi.org/10.2147/JMDH.S51947 Open access Background: Older persons in transition between hospital and home care services are in a particularly vulnerable situation and risk unfortunate consequences caused by organizational inefficiency. The purpose of the study reported here was to elucidate how home nursing leaders experience the administration of care to older people in transition from hospital to their own homes. Methods: A qualitative study design was used. Ten home nursing leaders in two municipalities in southern Norway participated in individual inte…
Administration of care to older patients in transition from hospital to home care services: home nursing leaders' experiences.
2013
Background Older persons in transition between hospital and home care services are in a particularly vulnerable situation and risk unfortunate consequences caused by organizational inefficiency. The purpose of the study reported here was to elucidate how home nursing leaders experience the administration of care to older people in transition from hospital to their own homes. Methods A qualitative study design was used. Ten home nursing leaders in two municipalities in southern Norway participated in individual interviews. The interview texts were audio taped, transcribed verbatim and analyzed by use of a phenomenological-hermeneutic approach. Results Three main themes and seven subthemes we…
Aqueous-phase reactive species formed by fine particulate matter from remote forests and polluted urban air
2021
In the aqueous phase, fine particulate matter can form reactive species (RS) that influence the aging, properties, and health effects of atmospheric aerosols. In this study, we explore the RS yields of aerosol samples from a remote forest (Hyytiälä, Finland) and polluted urban locations (Mainz, Germany; Beijing, China), and we relate the RS yields to different chemical constituents and reaction mechanisms. Ultra-high-resolution mass spectrometry was used to characterize organic aerosol composition, electron paramagnetic resonance (EPR) spectroscopy with a spin-trapping technique was applied to determine the concentrations of ⚫OH, O2⚫-, and carbon- or oxygen-centered organic radicals, and a …
Catalytic effect of transition metals (copper, iron, and nickel) on the foaming and properties of sugar-based carbon foams
2019
Abstract Recently, bio-based carbon foams have gained much interest in many chemical industry fields because of their unique structure and properties. This study provides new information on the effects of catalytic metals (iron, nickel, and copper) on the foaming process. Specifically, the effects of these catalysts on the density, foam growth, and cell size and then further on the pore size distribution and specific surface areas after the physical activation are considered. Furthermore, some of the activated sugar foams were used in adsorption tests using methylene blue as adsorbent. Results showed that the highest effect on foam density was obtained using the iron catalyst in the foaming…
Transition metal ion induced hydrogelation by amino-terpyridine ligands
2014
Hydrogelation behavior of two amino-terpyridine ligands in the presence of divalent metal ions in water was studied in detail. The effect of ligand structure and different counter anions on the gel morphologies was also explored. peerReviewed
Role of elastic and electronic interactions in trapping of hydrogen by impurities in transition metals
1985
The interplay between the lattice distortion and the electronic contributions to the trapping of migrating hydrogen isotopes by substitutional impurities is investigated. We use a comprehensive calculational scheme incorporating (i) the effective-medium theory for the electronic interaction, (ii) the lattice Green’s function for elastic coupling, and (iii) the hydrogen quantum motion. The calculations for Ti and Cr impurities in V host show that lattice strain effects dominate. Cr, which otherwise provides an electronic trap site, does not induce trapping when elastic effects are incorporated. The situation in the case of Ti is just the reverse. We find no isotope dependence of the binding …
CoS2/TiO2 Nanocomposites for Hydrogen Production under UV Irradiation
2019
Transition metal chalcogenides have intensively focused on photocatalytic hydrogen production for a decade due to their stronger edge and the quantum confinement effect. This work mainly focuses on synthesis and hydrogen production efficiencies of cobalt disulfide (CoS2)-embedded TiO2 nanocomposites. Materials are synthesized by using a hydrothermal approach and the hydrogen production efficiencies of pristine CoS2, TiO2 nanoparticles and CoS2/TiO2 nanocomposites are compared under UV irradiation. A higher amount of hydrogen production (2.55 mmol g&minus
Changes in Students' Psychological Well-Being during Transition from Primary School to Lower Secondary School : A Person-Centered Approach
2019
This person-centered study examined the patterns and the dynamics of pattern change based on 1666 Finnish students' self-reported psychological well-being during the transition from primary school to lower secondary school. Moreover, we examined the stability in the profile memberships and the influence of changes in perceived support from teachers, families, and peers on changes in students' psychological well-being. Six student profiles were identified using the I-states-as-objects-analysis (ISOA) procedure: (a) High well-being profile; (b) Average well-being but low educational aspirations profile; (c) Low well-being profile; (d) Low well-being but high educational aspirations profile; (…