19 research outputs found
Funeral oratoria, que en las celebres honras, que consagro la religiosissima comunidad de Rmos. PP. Trinitarios Calzados de la ciudad de Granada, el dia 25, de septiembre de 1722 à la loable memorial de el venerable Fr. Feliciano de Sevilla... de PP. Capuchinos del S. P. S. Francisco / dixo el M. R. P. ... Fr. Vicente de Burgos, hijo de la... Trinitaria familia de la Observancia...; sacala a luz y la dedica... un devoto de este soberano mysterio...
No full textPrecede al tit.: "Alabada sea la SS. Trinidad".
Fecha de prelim.: 1722.
Pie de imp. tomado de colofón.
Port. con orla tip.
Sign.: A-C4.A 112/105(06
Complex compounds of transition metals with hydroxyaromatic carboxylic acids as precursors for the synthesis of nanosized metal oxides
No full textEight complex compounds of MnII, FeII, CoII, NiII and CuII with 2,4,6-trihydroxy benzoic acid and 3,4,5-trihydroxybenzoic acid were synthesized in a crystalline form. Nanosized metal oxide particles obtained by thermal decomposition of the complexes were studied by X-ray powder dif raction analysis and electron microscopy. © 2020, Springer Science+Business Media LLC
Analysis and synthesis in a geometrical context. Antonio Hugo de Omerique’s Analysis geometrica
No full textEntre los matemáticos españoles del siglo XVII brilla con luz propia el geómetra andaluz Antonio Hugo de Omerique, autor del Analysis geometrica (1689). En dicha obra, alabada por el propio Isaac Newton, Omerique se sirve de un método “nuevo y verdadero para la resolución tanto de problemas geométricos como de cuestiones aritméticas”. Se trata precisamente del método de análisis y síntesis. En este artículo realizamos una breve descripción de esta obra y presentamos algunos ejemplos en los que el matemático sanluqueño aplica el análisis a la resolución de problemas geométricos de construcción. Además, presentamos algunas reflexiones que podrían contribuir al diseño de una actividad para ser llevada a cabo con profesorado de secundaria en formación.Among the Spanish mathematicians of the seventeenth century the Andalusian geometer Antonio Hugo de Omerique, author of the geometric analysis (1689) shines with its own light. In this work, praised by Isaac Newton himself, Omerique uses a "new and true method for the resolution of both geometric problems and arithmetic issues." It is the method of analysis and synthesis. In this article we briefly describe this book and we present some examples in which the mathematician from Sanlúcar applies the analysis to the resolution geometric construction problems. In addition, we present some reflections that could contribute to the design of an activity to be carried out with pre-service secondary school teachers
La artista en el desierto. Agnes Martin: notas sobre arte y soledad
No full textEn los últimos años, hemos asistido a una creciente mitología en torno a la figura de Agnes Martin, la influyente y alabada artista de posguerra. Su pintura despojada, reduccionista y completamente abstracta no revela nada de su persona. Sin embargo, sus recientes retrospectivas en la TATE Modern y el Museo Solomon R. Guggenheim (2015 y 2016, respectivamente), han despertado una nueva curiosidad por la biografía de la artista, a menudo incierta y llena de contradicciones. Su decisión de abandonar Nueva York en 1967, justo cuando su carrera comenzaba a ser aclamada internacionalmente, y su retiro en los desiertos de Nuevo Méjico, donde vivió de forma casi ascética (sin electricidad, agua corriente o teléfono durante largos periodos) y en relativo aislamiento hasta el final de su vida, han contribuido a la mitificación de la artista, que es frecuentemente referida como “sacerdotisa de la abstracción”, “mística”, “icono”, “sabia” y hasta “santa”. Este texto examina los escritos, notas y cartas de Martin, así como sus declaraciones habladas en documentales grabados pocos años antes de su muerte, al objeto de encontrar vínculos entre la figura alienada y contradictoria de la artista y su propósito estético. Jamás fue Martin tan prolífica como cuando abrazó demanera irrevocable la tranquilidad del desierto.La soledad se configuró como prerrequisito creativo
para una artista determinada a alcanzar “claridad mental”, un estado exigido para ejecutar su refinada obra
Unusual Substitution in Hydrazinobenzoic Acid upon Complexation. Crystal and Molecular Structure of Hydrazinobenzoic Acid Hydrochloride
No full textAbstract: The crystal and molecular structure of 2-hydrazinobenzoic acid was determined. In solution in the presence of copper(II) chloride, 2-hydrazinobenzoic acid is transformed into 2-chlorobenzoic acid (HL1) and is coordinated to copper(II) cations to form the binuclear structure [Cu(H2O)]2(µ-L1)4 with bridging carboxylate groups of the ligand (L1)–. Three complexes of HL1 with Fe(II), Co(II), and Zn(II) were isolated in the crystalline state and studied by spectroscopic methods. It was found that the organic molecules are involved in the complexes in the monodeprotonated chelating form. © 2021, Pleiades Publishing, Inc
Crystal structure of poly[μ2-aqua-aqua(μ<inf>2</inf>-4-nitro-2,5,6-trioxo-1,2,5,6-tetrahydropyridin-3-olato)-hemi-μ<inf>4</inf>-oxalato-barium(II)]
No full textIn the title coordination polymer, [Ba(C5HN2O6)(C2O4)0.5(H2O)2]n, the tenfold coordination of the Ba centre consists of four O atoms from the two 4-nitro-2,5,6-trioxo-1,2,5,6-tetrahydropyridin-3-olate (L) anions, three O atoms of two oxalate anions and three water molecules. The Ba - O bond lengths fall in the range 2.698 (3)-2.978 (3) Å. The L ligand chelates two Ba atoms related by a screw axis, leading to formation of fused five- and six-membered chelate rings. Due to the bridging function of the ligands and water molecules, the complex monomers are connected into polymeric two-dimensional layers parallel to the bc plane. Intermolecular O - H⋯O hydrogen bonds link these layers into a three-dimensional supramolecular framework
Novel metal complexes of bispyrazole azo dyes for chemical fibers
No full textNovel heterocyclic derivatives of 1-aryl(hetaryl)-3-methyl-4-azopyrazolone-5 and its metal complexes were synthesized. Their color properties were evaluated spectrophotometrically. The ability to use the synthesized compounds as dispersed yellow-to-red dyes for polyamide fibers was demonstrated. © 2016 Springer Science+Business Media New York
An unusual coordination of a 4-azopyrazol-5-one heterocyclic derivative with metals. Synthesis, X-ray studies, spectroscopic characteristics, and theoretical modeling
No full textA series of novel transition and rare-earth metal complexes of (Z)-4-((1-(benzo[d]thiazol-2-yl)-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl)diazenyl)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one (HL) were isolated and identified by FT IR, EPR, 1H NMR, and UV–VIS spectroscopy. The crystallographic data for [Cu2Cl3(L)(H2O)]2·1.5H2O·CH2Cl2 were obtained. The compound exists in the form of a tetranuclear species with two different metal coordination modes. The coordination polyhedra of two cations can be described as somewhat distorted tetragonal pyramids as well as two other Cu atoms of the tetrameric molecule adopt the trigonal bipyramidal coordination. The bridging chloride ligands link differently coordinated metal cations. The quantum chemical calculations indicate the existence of a ferromagnetic exchange interaction in pairs. That is in agreement with the EPR spectrum of the substance. The complex formation constants in water-ethanol solutions were determined. © 2017 Elsevier B.V
Novel metal complexes of bispyrazole azo dyes for chemical fibers
No full textNovel heterocyclic derivatives of 1-aryl(hetaryl)-3-methyl-4-azopyrazolone-5 and its metal complexes were synthesized. Their color properties were evaluated spectrophotometrically. The ability to use the synthesized compounds as dispersed yellow-to-red dyes for polyamide fibers was demonstrated. © 2016 Springer Science+Business Media New York
Crystal structure of poly[μ2-aqua-aqua(μ<inf>2</inf>-4-nitro-2,5,6-trioxo-1,2,5,6-tetrahydropyridin-3-olato)-hemi-μ<inf>4</inf>-oxalato-barium(II)]
No full textIn the title coordination polymer, [Ba(C5HN2O6)(C2O4)0.5(H2O)2]n, the tenfold coordination of the Ba centre consists of four O atoms from the two 4-nitro-2,5,6-trioxo-1,2,5,6-tetrahydropyridin-3-olate (L) anions, three O atoms of two oxalate anions and three water molecules. The Ba - O bond lengths fall in the range 2.698 (3)-2.978 (3) Å. The L ligand chelates two Ba atoms related by a screw axis, leading to formation of fused five- and six-membered chelate rings. Due to the bridging function of the ligands and water molecules, the complex monomers are connected into polymeric two-dimensional layers parallel to the bc plane. Intermolecular O - H⋯O hydrogen bonds link these layers into a three-dimensional supramolecular framework
