Search results for "Crown"
showing 10 items of 324 documents
CCDC 635244: Experimental Crystal Structure Determination
2008
Related Article: E.Coronado, J.R.Galan-Mascaros, C.Marti-Gastaldo|2007|Inorg.Chem.|46|8108|doi:10.1021/ic700808h
CCDC 1042084: Experimental Crystal Structure Determination
2015
Related Article: Kaisa Helttunen, Tiia-Riikka Tero, Maija Nissinen|2015|CrystEngComm|17|3667|doi:10.1039/C5CE00311C
Electronic Structure Study of Seven-Coordinate First-Row Transition Metal Complexes Derived from 1,10-Diaza-15-crown-5: A Successful Marriage of The…
2005
A detailed study of the electronic structure of seven-coordinate Mn(II), Co(II), and Ni(II) complexes with the lariat ether N,N'-bis(2-aminobenzyl)-1,10-diaza-15-crown-5 (L(1)) is presented. These complexes represent new examples of structurally characterized seven-coordinate (pentagonal bipyramidal) complexes for the Mn(II), Co(II), and Ni(II) ions. The X-ray crystal structures of the Mn(II) and Co(II) complexes show C(2) symmetries for the [M(L(1))](2+) cations, whereas the structures of the Ni(II) complexes show a more distorted coordination environment. The magnetic properties of the Mn(II) complex display a characteristic Curie law, whereas those of the Co(II) and Ni(II) ions show the …
Synthesis and chemico-physical characterization of tin(IV) complexes with some crown ethers
1986
Abstract Some neutral adducts of diorganotin(IV) perchlorates and thiocyanates with three crown-ethers have been synthesised; they are of the type Me 2 SnX 2 L m · n H 2 O where m = 1 or 2, n = 2 or 4, X = ClO 4 or NCS, and L = 18-crown-6, 15-crown-5, and 12-crown-4. The values for m and n have been correlated with the coordinating ability of the two anions and with the steric hindrance by the crown ether molecules. From infrared and Mossbauer data, an octahedral coordination geometry is proposed for all the complexes. The Mossbauer parameters are discussed in terms of the electronegativity of the ligands on the tin(IV) center and of the distortions produced in the coordination polyhedra by…
Energetics of Water−Dodecyl Surfactant−Macrocyclic Compound Ternary Systems
1996
Enthalpies of dilution and osmotic coefficients of sodium dodecyl sulfate (NaDS) and dodecyltrimethylammonium bromide (DTAB) in water + 18-crown-6 ether (CR) and water + β-cyclodextrin (CD) at a fixed cosolvent concentration were measured at 298 and 310 K, respectively, as functions of the surfactant concentration (mS). Enthalpies of transfer ΔH (W → W + S) of CR (0.03 m) from water to NaDS and DTAB aqueous solutions as functions of mS were also determined at 298 K. From the enthalpies of dilution the apparent (LΦ,S) and partial (L2,S) molar relative enthalpies of both surfactants were calculated. Despite CR forms inclusion complexes with the anionic surfactant only, the L2,S vs mS profiles…
The soundscape of the ceremonies for the beatification of St Teresa of Ávila in the Crown of Aragon, 1614
2015
[EN] The beatification of Saint Teresa of Ávila in October 1614 gave rise to widespread celebrations in many of the cities and towns of the Iberian Peninsula. Printed relaciones describing these celebrations, despite their limitations —in terms of political agenda, propaganda, rivalry and literary style— can nevertheless provide information about musical experience and can help to recreate the ephemeral soundscapes of these events. This article will focus on the ceremonies held in the Crown of Aragon, especially Saragossa and Barcelona, taking into consideration the typology of different musics —heraldic, divine and festive— and factors such as the moment in time, function, dynamic, urban s…
The expansion of a European feudal monarchy during the 13th Century: the Catalan-Aragonese Crown and the consequences of the conquest of the kingdoms…
2009
-Enric.Guinot@uv.es In the middle of the 13th century the Crown of Aragon conquered by military means the Muslim Mediterranean Coast of the Iberian Peninsula, incorporating it into the European feudal world; this resulted in the destruction of the Andalusí state and part of its society as well as in a redistribution of towns, villages, houses and lands among Christians. The historiography of some years ago emphasized the role of trade and urban burgesses in these new societies, but present opinion is more related to a long expansion of feudal society as well as the creation in Majorca and Valencia of a colonial society. Logically, the consequences of this process had also an effect in Catal…
In vitro comparison of flexural strength and elastic modulus of three provisional crown materials used in fixed prosthodontics
2013
Objectives: To evaluate and compare the flexural strength and the elastic moduli of three provisional crown materials (methyl methacrylate based autopolymerized resin, bis acryl composite based autopolymerized resin and urethane dimethacrylate based light polymerized resin) after storing in artificial saliva and testing at intervals of 24 hours and 7 days. Study design: A metal master mould with four slots of dimensions 25x2x2 mm was fabricated to obtain samples of standard dimensions. A total of 135 specimens were thus obtained with 45 each of three provisional materials. Further 15 samples of each group were tested after storing for one hour at room temperature and again at intervals of 2…
Credit, Debt and FInances of the Queen's Household in the Crown of Aragon at the End of the Fourteenth Century. The Agreement between the Queen Viola…
2018
A finales del siglo XIV la tesorería de la reina Violante de Bar padecía de un fuerte endeudamiento que imposibilitaba prácticamente cualquier pago, por lo que se decidió cambiar la dirección de la gestión económica de la Casa de la reina. En el presente artículo analizaremos las estrategias para solucionar el problema del endeudamiento, mediante la edición y el análisis de los excepcionales capítulos y memoriales firmados por la reina Violante y su nuevo tesorero, Berenguer de Cortilles, uno de sus mayores acreedores privados. At the end of the Fourteenth century, Queen’s treasury in the Crown of Aragon suffered from a heavy debt that made virtually impossible any ordinary payment. As a re…
Wear in Antagonist Teeth Produced by Monolithic Zirconia Crowns: A Systematic Review and Meta-Analysis
2020
Background: The aim of this systematic review and meta-analysis was to determine the wear sustained in the natural antagonist tooth in cases of full-coverage fixed-base prosthetic restorations or monolithic zirconia tooth-supported crowns, as well as to determine the wear in the restoration itself, both in the short- and medium-term and considering the factors that may influence wear. Material and methods: A systematic literature review and meta-analysis, based on Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) recommendations, of clinical studies that evaluated wear in antagonist teeth in relation to fixed-prosthesis monolithic zirconia crowns. A total of 5 data…