Search results for "throne"
showing 10 items of 23 documents
Fluorescent substituted amidines of benzanthrone: synthesis, spectroscopy and quantum chemical calculations.
2012
Abstract Several new substituted amidine derivatives of benzanthrone were synthesized by a condensation reaction from 3-aminobenzo[de]anthracen-7-one and appropriate aromatic and aliphatic amides. The obtained derivatives have a bright yellow or orange fluorescence in organic solvents and in solid state. The novel benzanthrone derivatives were characterized by TLC analysis, 1H NMR, IR, MS, UV/vis, and fluorescence spectroscopy. The solvent effect on photophysical behaviors of these dyes was investigated, and the results showed that the Stoke’s shift increased, whereas quantum yield decreased with the growth of the solvent polarity. The structure of some dyes was confirmed by the X-ray singl…
Una statua fittile di divinità seduta da Capodarso: ipotesi di ricostruzione
2012
The subject of the contribution is the analysis of the lower part (feet) of a clay statue and two clay artefacts decorated with a figurative scene, all found in the anellenic site of Monte Capodarso (Enna) and datable between the 6th and the 5th century BC The latter, considered, at the time of their discovery, as parts of a trapeze, are now considered, in the light of the analysis of the clays, of the decoration and on the basis of comparisons, to be the armrests of the throne on which the figure sat, of which only the feet remain, probably a cult agalma.
Bárbara de Braganza.Una aproximación a su faceta como coleccionista
2018
La presente investigación analiza la faceta coleccionista de la reina Bárbara de Braganza tomando como referencia a su predecesora en el trono español, Isabel de Farnesio, y a partir de las pinturas y piezas de orfebrería que donó al monasterio de las Salesas Reales. Para ello analizamos previamente la educación recibida y su papel en la corte de Fernando VI. Adjuntamos la transcripción del inventario correspondiente a las pinturas; Esta pesquisa analisa o lado do colector da rainha Bárbara de Bragança, com referência ao seu antecessor no trono espanhol, Isabel de Farnesio, e de pinturas e peças de ourives doadas ao mosteiro da Salesas Reales. Para isso, analisou recebeu previamente educaçã…
Inhibition of the mutagenicity of 2-nitrofluorene, 3-nitrofluoranthene and 1-nitropyrene by flavonoids, coumarins, quinones and other phenolic compou…
1997
When 56 flavonoids, 32 coumarins, five naphthoquinones, 12 anthraquinones and five structurally-related compounds were tested for their antimutagenic potencies with respect to mutagenicities induced by 2-nitrofluorene (2-NF), 3-nitrofluoranthene (3-NFA) and 1-nitropyrene (1-NP) in Salmonella typhimurium TA98 distinct structure-activity relationships were detected. First, the tetracyclic nitroarenes 3-NFA and 1-NP were in general more effectively antagonized by potent antimutagenic flavonoids and coumarins than the tricyclic 2-NF, while there were only minor differences with quinones. Secondly, antimutagenicity of natural compounds of plant origin correlated with the aglyconic nature 10 of a…
Joziknipholones A and B: The First Dimeric Phenylanthraquinones, from the Roots ofBulbine frutescens
2007
From the roots of the African plant Bulbine frutescens (Asphodelaceae), two unprecedented novel dimeric phenylanthraquinones, named joziknipholones A and B, possessing axial and centrochirality, were isolated, together with six known compounds. Structural elucidation of the new metabolites was achieved by spectroscopic and chiroptical methods, by reductive cleavage of the central bond between the monomeric phenylanthraquinone and -anthrone portions with sodium dithionite, and by quantum chemical CD calculations. Based on the recently revised absolute axial configuration of the parent phenylanthraquinones, knipholone and knipholone anthrone, the new dimers were attributed to possess the P-co…
Breaking Bonds and Forming Nanographene Diradicals with Pressure.
2017
New anthanthrone-based polycyclic scaffolds possessing peripheral crowed quinodimethanes have been prepared. While the compounds adopt a closed-shell butterfly shaped structure in the ground state, a concave-to-convex fluxional dynamic inversion is accessible with a low energy barrier through an open-shell diradicaloid transition-state. Mainly driven by the release of strainattributed to the steric hindrance at the peri position of the anthanthrone core, a low-lying open-shell diradical is accessible through planarization of the core, which can be achieved by thermal excitation in solution. Alternatively, planarization can be achieved by application of mild pressure in the solid state, in w…
La cúpula de la Basílica de la Virgen de los Desamparados de Valencia (I): el ámbito de la gloria
2007
-Rafael.G-Mahiques@uv.es Estudio iconográfico de los frescos de la cúpula de la Basílica de la Virgen de los Desamparados de Valencia, obra de Antonio Palomino realizada entre 1701 y 1704. Aproximación a un análisis del ámbito de la Gloria celestial. Aquí la Virgen aparece como reina e intercesora ante el Trono de Gracia, en donde, de acuerdo con la tradición iconográfica, se incluye a San Juan Bautista y los arma Christi portados por ángeles. En torno a este núcleo se disponen los bienaventurados, agrupados bajo el criterio de la Letanía Lauretana, en la cual María es invocada con los títulos de Reina de los Ángeles, de los Patriarcas, Profetas, Apóstoles, Mártires, Confesores, Vírgenes y …
PHA Latex Composite Films: Mechanical Properties and Surface Visualization
2013
Homopolymer PHB and copolymer PHB/HV containing granules were isolated from Azotobacter chroococcum cells and used for latexes formation. Composite latex films were formed from the PHB and PHB/HV latexes with different content of poly (vinyl alcohol) and glycerol and a hydrophobic fluorescent benzanthrone derivated dye 3-piperidinobenzanthrone, possessed high fluorescence intensity in a system with PHA granules. Fluorescence based methods were used for characterization of the elaborated latex film by their stability at high temperature and for visualization of the film surfaces PHA granules distribution. Film stability in phosphate buffered saline was evaluated by dye migration activity in …
Satire and History in Performance: A New Edition of the Sotye nouvelle des croniqueurs (Pierre Gringore (?), c. 1515)
2018
A variant of the fools’ play known as the sottie, which was most likely performed just months after Francis I’s ascension to the French throne in January 1515, the Sotye nouvelle des croniqueurs ha...
The inhibition by naphthoquinones and anthraquinones of 2-amino-3-methylimidazo[4,5- f ]quinoline metabolic activation to a mutagen: a structure-act…
1998
Nine naphthoquinones, 19 anthraquinones, and nine structurally related monoketonic compounds such as anthrone, xanthone, etc., inhibited mutagenicity induced by 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) in Salmonella typhimurium TA 98 in the presence of rat liver S9 with distinct structure-activity relationships. A carbonyl function was a prerequisite for antimutagenicity while, in general, anthraquinones (IC50 values: 2.3–>213 nmol/ml top agar) were more potent antimutagens than structurally related monoketonic compounds (IC50 values: 25.3–94.9 nmol/ml top agar) and naphthoquinones (IC50 values: 3.7–90.7 nmol/ml top agar). The parent compounds and methyl substituted derivatives were alr…