Search results for "ATAL"
showing 10 items of 10591 documents
Ionic Liquids as Homogeneous Catalysts for Glycerol Oligomerization
2022
Ionic liquids (ILs) were used for the first time as catalysts for the glycerin condensation reaction. A series of imidazolium and ammonium ionic liquids differing in the length of the alkyl substituent (C2, C12, and C14) and the type of anion (Br−, CH3COO−, and NaHPO4−) were synthesized using a typical two-step method. The structure of the obtained ILs was confirmed by nuclear magnetic resonance 13C NMR, and their base power was determined on the basis of the Hammett function. The oligomerization of glycerin with the participation of the obtained ionic liquids and, for comparison, in the presence of a homogeneous basic catalyst Na2CO3, was carried out for 3 h at 180 °C, under a pressure of …
Palladium supported on cross-linked imidazolium network on silica as highly sustainable catalysts for the Suzuki reaction
2013
IPOGLICEMIA NEONATALE: RILIEVI EPIDEMIOLOGICI IN UN CAMPIONE DI NEONATI RICOVERATI (2012-2017)
2017
ipoglicemia neonatale
Eco-friendly cavity-containing iron oxides prepared by mild routes as very efficient catalysts for the total oxidation of VOCs
2018
Iron oxides (FeOx) are non-toxic, non-expensive and environmentally friendly compounds, which makes them good candidates for many industrial applications, among them catalysis. In the present article five catalysts based on FeOx were synthesized by mild routes: hydrothermal in subcritical and supercritical conditions (Fe-HT, Few200, Few450) and solvothermal (Fe-ST1 and Fe-ST2). The catalytic activity of these catalysts was studied for the total oxidation of toluene using very demanding conditions with high space velocities and including water and CO2 in the feed. The samples were characterized by X-ray diffraction (XRD), scanning and high-resolution transmission electron microscopy (SEM and…
Experimental Confirmation of a Topological Isomer of the Ubiquitous Au25(SR)18 Cluster in the Gas Phase
2021
High-resolution electrospray ionization ion mobility mass spectrometry has revealed a gas-phase isomer of the ubiquitous, extremely well-studied Au25(SR)18 cluster both in anionic and cationic form. The relative abundance of the isomeric structures can be controlled by in-source activation. The measured collision cross section of the new isomer agrees extremely well with a recent theoretical prediction (Matus, M. F.; et al. Chem. Commun. 2020, 56, 8087) corresponding to a Au25(SR)18– isomer that is energetically close and topologically connected to the known ground-state structure via a simple rotation of the gold core without breaking any Au–S bonds. The results imply that the structural d…
Complementary approaches for assessing protein sources in fish feed
2018
Fluctuating fishmeal (FM) prices and declining marine fish stocks have led to the current trend of replacing dietary FM with plant proteins (PP) in fish feed. PPs offer challenges both with respect to nutritional quality and the occurrence of antinutrients. The assessment of utilisation efficiency of PPs for growth is important for the sustainable production of fish feed. The overall aim of this thesis was to investigate the applicability of stable isotope analysis in combination with respirometry in the evaluation of dietary PPs for juvenile rainbow trout (Oncorhynchus mykiss). The dietary PPs were corn gluten meal (CGM), rapeseed protein concentrate (RPC) and potato protein (PoP). Complet…
Il fondo musicale della Chiesa Madre di Enna: Catalogo
2004
Il volume raccoglie il catalogo delle opere musicali, sia manoscritte che a stampa, conservate presso la Chiesa Madre di Enna e databili dal XVIII al XX secolo. È preceduto da un'ampia introduzione che riferisce dell'attività della cappella musicale del duomo, procedendo alla valutazione del fondo e approfondendo l'ordinamento e i sistemi costitutivi del catalogo. Ogni scheda presenta una descrizione dell'unità catalografica, corredata di autore, titolo originale, titolo convenzionale e incipit musicali.
Charge-Assisted Halogen Bonding in an Ionic Cavity of a Coordination Cage Based on a Copper(I) Iodide Cluster.
2023
The design of molecular containers capable of selective binding of specific guest molecules presents an interesting synthetic challenge in supramolecular chemistry. Here, we report the synthesis and structure of a coordination cage assembled from Cu3I4– clusters and tripodal cationic N-donor ligands. Owing to the localized permanent charges in the ligand core the cage binds iodide anions in specific regions within the cage by ionic interactions. This allows the selective binding of bromomethanes as secondary guest species within cage promoted by halogen bonding, which was confirmed by single crystal X-ray diffraction. peerReviewed
"Se on korkeemmas käres!" : maatalousyrittäjien kokemuksia halpuuttamisesta ja halpuuttamiskeskustelusta
2016
Tämän tutkimuksen tarkoituksena on selvittää mitä tarkoitetaan halpuuttamisella ja halpuuttamiskeskustelulla sekä millaisia kokemuksia maatalousyrittäjillä on halpuuttamisesta ja halpuuttamiskeskustelusta. Halpuuttaminen on uusi ilmiö, eikä siitä ole saatavissa aiempaa tieteellistä tutkimusta. Sen vuoksi tutkimuksessa tehtiin halpuuttamiseen liittyvästä uutisoinnista media-analyysi, jonka avulla kartoitettiin, mitä halpuuttamisella ja halpuuttamiskeskustelulla tarkoitetaan. Media-aineisto on kerätty tammikuusta 2015 huhtikuuhun 2016. Aineistonkeruun ajankohta rajautuu halpuuttamisen alusta maatalousyrittäjien haastatteluiden toteutusaikaan. Media-analyysin tueksi suoritettiin kaksi asiantun…