Search results for "Urea"
showing 10 items of 888 documents
Municipal Building Regulations for Energy Efficiency in Southern Italy
2014
The building sector is still one of the most energy consuming sectors in Italy, like developed countries in Europe. At European level, the main policy driver related to the energy use in buildings is the Energy Performance of Buildings Directive (EPBD, 2002/91/EC) and its recast. Through the EPBD in- troduction, requirements for certification, inspections, training or renovation are now imposed in Member States. In order to fulfill the expected changes, local regulations are a key factor aiming at sustainable territorial planning. It is thus required support the issue of local rules at municipal level in order to guide local administrators and technicians and to limit discretional power of …
The component helminth community in six sympatric species of Ardeidae.
2005
We studied the helminth communities in 6 sympatric species of Ardeidae (Ixobrychus minutus (Linnaeus, 1766), Nycticorax nycticorax (Linnaeus, 1758), Bubulcus ibis (Linnaeus, 1758), Egretta garzetta (Linnaeus, 1766), Ardea cinerea (Linnaeus, 1758), and Ardea purpurea (Linnaeus, 1766)) from "La Albufera de Valencia," Spain. The survey revealed 13 species of helminth parasites: 5 digeneans, 2 cestodes, and 6 nematodes. The component helminth communities of the Ardeidae examined are depauperate and conform to the pattern typically found in isolationist communities, probably because of their high trophic dependence on a few prey species. Evenness was positively correlated with richness and abund…
Nuevo híbrido del género Centaurea L. (Compositae) sección Seridia (Juss.) Czerep
2010
[EN] A new hybrid of the Centaurea L. genus (Compositae) is described: Centaurea x subdecurrens nothosubsp. oblanceolata (C. aspera subsp. stenophylla x C. seridis. subsp. cruenta). It is only found at the contact areas between the parental species, and is therefore a very rare taxon. Key words: Centaurea, hybrid, taxonomy.
El Siglo de Oro español en la escena pública contemporánea. La Compañía Nacional de Teatro Clásico (1986-2011)
2014
En el año 1986 comienza la andadura de la Compañía Nacional de Teatro Clásico (CNTC) y España cuenta por primera vez con una compañía estatal pública dedicada en exclusiva a la escenificación de las obras dramáticas clásicas. Desde aquel año hasta el presente, y pese al retraso secular respecto a países como Francia e Inglaterra, el trabajo modernizador de la CNTC a la hora de llevar los clásicos a las tablas ha constituido un auténtico revulsivo conceptual para la dramaturgia barroca en la época contemporánea. Este cambio de paradigma artístico y social que ha representado la Compañía a lo largo de las últimas décadas merecía un estudio en profundidad. Y a ello se dedica esta tesis doctora…
Major Janusz Rowiński - żołnierz walczący o niepodległość i oficer bydgoskiej Ekspozytury nr 3 Oddziału II SG WP
2016
Artykuł przedstawia drogę służby wojskowej i k ariery oficera polskiego wywiadu mjr. Janusza Rowińskiego (1895-1980) od wybuchu wojny światowej (1914-1918) jako żołnierza armii Austro-Węgier, w niepodległej Polsce jako oficera zawodowego Wojska Polskiego, po II wojnę światową jako oficera Polskich Sil Zbrojnych na Zachodzie aż do zakończenia jego służby w 1947 r.
Tra territorio e paesaggio
2018
I pannelli presentati in mostra sono riferiti a due tesi di laurea discusse nell’anno accademico 2016/17 a compimento del corso magistrale in Architettura a ciclo unico erogato nel dArTe, dipartimento di Architettura e Territorio, dell’Università Mediterranea di Reggio Calabria. Entrambi i lavori delineano nel termine waterfront una porzione ampia di territorio, ovvero non limitata al solo litorale marino in virtù delle connessioni che la linea di costa instaura con il territorio retrostante.
Cytotoxic and chemotaxonomic study of isolated metabolites from Centaurea aegyptiaca
2020
Selective dimerisation of tetraurea calix[4]arenes
2010
The formation of hydrogen-bonded dimeric capsules from tetraurea calix[4]arenes is controlled by loops, connecting adjacent urea functions, and more or less bulky substituents. The dimerisation is only possible if loops are not overlapping and if the respective residues can pass the loops. A sorting scheme based on small and bulky residues and one to four loops allows reducing the number of possible dimers from 35 to 6 in a stoichiometric mixture of 11 ureas. With three different loop sizes (O–(CH2) n –O chains with n = 10, 14, 20 connecting adjacent phenylurea functions via their meta positions), it is possible to distinguish four urea residues of different sizes (small, medium, bulky and …
Antiproliferative activity against leukemia cells of sesquiterpene lactones from the Turkish endemic plant Centaurea drabifolia subsp. detonsa
2017
The apolar organic extract obtained from aerial parts of Centaurea drabifolia Sibth. & Sm. subsp. detonsa (Bornm.) Wagenitz, growing wild in Turkey, was investigated for the first time for its secondary metabolite composition. Seven sesquiterpene lactones belonging to the guaiane class (1-7), including the new compound 4, along with a fatty acid lactone derivative (8), were isolated. The structures of these compounds were established by spectroscopic analysis, including 2D NMR spectroscopic techniques, with the stereostructure of the new guaiane 4 determined with the help of MTPA derivatization. Cytotoxic activities of compounds 1-7 were evaluated against two cancer cell lines, namely acute…
Addition reactions of azoesters with 2-thioquinazolinones
1981
Reaction between diethyl azodicarboxylate (I) and 1,2,3,4-tetrahydro-2-thioquinazolin-4-one (II), as a cyclic model of thiourea, both in alcoholic medium and in inert solvents has been investigated. By carrying out the reaction in an inert solvent, it was possible to isolate an intermediate. Evidence is presented that the intermediate, in turn, was converted into the final products. Structures were unequivocally assigned by mass spectrometry.