Search results for "urea"
showing 10 items of 888 documents
Rapporto statistico 2008-2010: Università degli studi di Palermo
2011
The influence of cerium to urea preparation ratio of nanocrystalline ceria catalysts for the total oxidation of naphthalene
2008
The influence of cerium salt/urea ratio on the activity of nanocrystalline ceria catalysts prepared by homogeneous precipitation with urea for the complete oxidation of naphthalene has been evaluated. Ceria catalysts were prepared from five different cerium salt/urea ratios (2:1, 1:1, 1:2, 1:3 and 1:4). Catalyst characterization (by BET, XRD and TPR) only revealed subtle differences in the characteristics of these catalysts with cerium salt to urea ratio. However, Raman and scanning electron microscopy (SEM) results indicated differences in the oxygen defect concentration (FWHM of Raman band) and morphology of the catalysts with variation of the preparation ratio. Catalysts prepared with 2:…
Le dilemme de l'ingénierie territoriale : socialiser les instruments d'action publique ou instrumentaliser la société?
2010
International audience; L'étude de l'ingénierie territoriale dans le Pays Beaujolais et Roannais en Rhône Alpes met en lumière une tendance à la recentralisation de la gestion publique territoriale. L'ingénierie territoriale est une bureaucratie professionnelle coincée entre les injonctions autoritaires de l’état et les velléités d'autonomie du pouvoir local. D'une part, l'Europe, les services centraux de l'état, dans la continuité du processus d'agencification des administrations diffusent des représentations du territoire et des bonne pratiques managériales aussi strictes que les règles du modèle bureaucratique wébérien. D'autre part, les pouvoirs locaux, face aux insuffisances des servic…
The European External Action Service: Torn apart between several principals or acting as a smart 'double-agent'?
2014
Published version of an article in the journal: Journal of Contemporary European Research. Also available from the publisher at: http://www.jcer.net/index.php/jcer/article/view/605/494 Open Access The European External Action Service (EEAS) is a hybrid and compound institutional actor in the EU’s multi-level administration with delegated authority from the member states (MS) to conduct the EU’s external action. Substantial competences, notably in the field of Neighbourhood and Trade policies, as well as Development and Cooperation remain under the control of the European Commission (Commission). At the same time, also Members of the European Parliament (EP) are more clearly voicing their in…
Ion pair recognition by ditopic crown ether based bis-urea and uranyl salophen receptors
2016
Thiourea Based Tritopic Halogen Bonding Acceptors
2023
Series of thiourea based tritopic receptor molecules were synthesized to be used as building blocks for halogen-bonded assemblies. Here 16 new receptor molecules were synthesized from two different 2,4,6-trialkyl-1,3,5-tris(bromomethyl)benzene starting materials via tris(isothiocyanatomethyl)benzene intermediates. The alkyl substituents in the benzene ring showed to be important for isothiocyanate group formation instead of competing thiocyanate group. The synthesis route allowed us to synthesize the isothiocyanate intermediates and further the receptor molecules without typically used and highly toxic thiophosgene. Synthesized receptor molecules were used to study their halogen bond accept…
Monikielisyyden näkeminen voimavarana : kokemuksia Utrechtin kansainvälisestä koulusta
2021
Monikielisyys on nykyisin arkipäivää monissa kouluissa. Myös Suomen kouluissa erikielisten oppilaiden määrä on kasvanut ja sen odotetaan yhä kasvavan tulevaisuudessa. Tässä artikkelissa tarkastelemme, miten koulut voivat positiivisesti huomioida monikielisyyttä arjessaan. Käytämme esimerkkinä Utrechtin kansainvälistä koulua Alankomaissa ja kuvaamme, miten oppilaiden monipuoliset kielirepertuaarit nähdään siellä voimavarana ja miten niitä hyödynnetään tarkoituksenmukaisesti opetuksessa. Koulu on erityisen monikielinen yhteisö, sillä oppilaat tulevat eri puolilta maailmaa ja puhuvat useita kieliä. Tämän lisäksi koulun henkilökunta koostuu noin 30 eri kansallisuudesta. Tämän seurauksena moniki…
The S … Hal and Se … Hal chalcogen bonding in a series of thiourea, selenourea and their derivatives
2021
The chalcogen bonding (ChB) in a series of thiourea, selenourea and their derivatives has been investigated in the present paper. Thus, selenourea and dimethylselenourea undergo dimerization and trimerization processes in the presence of various halogen species (1–5). Selenourea and dimethylselenourea form trimers 3–4 in the presence of lighter halogens (chlorine and bromine) through Se⋯Se chalcogen bonding. When moving to heavier halogen (iodine), the dimers 1–2 are formed. Thiourea and its derivatives also tend to make very strong S⋯S bonds and form dimers in the case of lighter halogens chlorine and bromine (compounds 6–7). However, the monomers separated by the iodine species are formed…
Rapporto statistico laureati STELLA 2006-2008 Università degli studi di Palermo
2009
Atlas of the Baltic languages: plant names of Slavonic origin
2015
Atlas of the Baltic Languages: Plant Names of Slavonic Origin The article investigates Slavonic-derived plant names in dialects of the two surviving Baltic languages – Latvian and Lithuanian. Historically, these Slavonisms were originally adopted by small-scale regional dialects, which are now disappearing. In 2009, a pilot study for the Atlas of the Baltic Languages was published. It comprised 12 geo-linguistic maps with Latvian, Lithuanian and English commentaries. 2012 saw the publication, in CD format, of the Atlas ’s first volume: Lexis 1: Flora . The material analysed concerns names for: (1) wild plants, e.g., cornflower, nettle, waybread, milfoil, dandelion, plantain; (2) cultivated …