'La Manteria'. Pinturas murales de la iglesia de Santo Tomás de Villanueva

La iglesia de Santo Tomás de Villanueva de Zaragoza es lo único que se conserva de lo que fuera el convento de agustinos observantes, llamado popularmente convento de la Mantería por ubicarse en la plaza del mismo nombre. Fué edificada entre 1663 y 1683 bajo el patronazgo del arzobispo de Zaragoza don Francisco Gamboa. Es un edificio barroco construido en ladrillo, con planta de cruz latina, de una sola nave, cubierta en sus tramos y brazos por cúpulas elípticas, siendo semiesférica la del crucero. Lo más destacable del edificio es su decoración mural. En un principio las pinturas cubrían la totalidad de las paredes y bóvedas. Los avatares históricos, desamortización y posterior empleo como almacén, así como el deterioro por efecto de la humedad, han hecho que sólo hayan llegado hasta nosotros las pinturas de las cúpulas. La ejecución de la pintura se debe al pintor de cámara de Carlos II, Claudio Coello, ayudado por su discípulo Sebastián Muñoz y por una serie de pintores locales. Claudio Coello trabajó entre 1683 y 1684, prolongándose las tareas hasta 1686.

Hà bitat en cova i espai pels ramats ca.6200-6000 BP:La Cova Colomera (Prepirineu de Lleida) durant el Neolític Antic.

En aquest treball es presenten les dades referents a la Cova Colomera (Sant Esteve de la Sarga, Pallars Jussà) durant el Neolític cardial final. A partir de diferents sondejos duts a terme des de l'any 2005, s'ha pogut observar la varietat d'usos i funcionalitats del jaciment en moments potencialment sincrònics. Per una banda,una zona on predominen les estructures de caire domètic (fogars, fosses i forats de pal)que ens mostren les dades entorn a l'hàbitat al jaciment; i per altra banda, un gran sector de la cavitat dedicat a l'estabulació dels ramats amb sediments de tipus fumier i probablement també a l'emmagatzematge. Tot això succeix en unes datacions d'entre 6180 +/- 40 i 6020 +/- 510BP. Aquestes dades es contextualitzen amb les d'altres jaciments de la zona pirinenca, un àmbit que sempre ha estat definit en la bibliografia com un espai de pas entre diferents biòtops ecològics, de les plantes fèrtils a les pastures de l'estiu.

Lagarta- falsa-medideira, Pseudoplusia includens (WALKER, 1857), nova praga do maracujazeiro no Espírito Santo

A espécie Pseudoplusia includens (Walker) (Lepidoptera: Noctuidae), lagarta-falsa-medideira, ataca diversas culturas de importância econômica, causando, na maioria das vezes, prejuízos consideráveis. Foram realizados levantamentos de todas as fases de desenvolvimento do inseto, no período de abril/2009 a abril/2010, em uma cultura de maracujá-azedo, Passifora edulis f. flavicarpa, no município de Linhares-ES, após ter sido constatada sua presença na área. A lagarta foi observada durante os meses de abril a novembro/2009 e de fevereiro a abril/2010, sendo constatados surtos mais severos nos meses de junho, setembro e novembro/2009, atingindo índices de até 80% de folhas danificadas. A planta invasora Solanum americanum (maria-pretinha), associada à cultura, é também hospedeira do inseto. Como inimigos naturais da lagarta, foram constatados o parasitoide Copidosoma truncatellum (Hymenoptera: Encyrtidae) e o entomopatógeno Baculovirus sp.. Este é o primeiro registro da ocorrência de P. includens na cultura de maracujá-azedo.

Dans le labyrinthe de la pensée. Approches croisées du Qu'est-ce que la philosophie de Gilles Deleuze et Félix Guattari

Ce cahier regroupe une série d'études portant, principalement, sur le Qu'est-ce que la philosophie? de G. Deleuze et F. Guattari. Il réunit des contributions de chercheurs confirmés - A. Sauvagnargues, A. Villani - et de jeunes chercheurs de l'Université de Lausanne sous la direction et la supervision de Hugues Poltier, membre de la section de philosophie de l'université.

Combinación de sistemas de flujo de baja y alta presion para la determinacion de Mg, Ca y Sr en salmueras por espectrofotometria de absorcion atomica con llama

This article describes the combination of low- and high-pressure flow systems for the determination of Magnesium, Calcium and Strontium by flame atomic absorption spectrometry (FAAS). In the low-pressure system a short C-18 RP column (length 0,5 cm) was utilized for the preconcentration/matrix separation step, xylenol orange was used as chelating agent and tetrabutylamonium acetate for ion pair formation. The hydraulic high pressure nebulization (HHPN) was used for sample transport and sample introduction in the high pressure system. The repeatabilities and detection limits for Mg, Ca and Sr were determined and compared with those obtained by pneumatic nebulization (PN). The results show that the detection limits obtained using the HHPN for Mg, Ca and Sr are between 1.5 to 2 times better than those obtained by PN when the signal transient was measured in area. The system presented a sampling frequency of 130 h-1 for direct determination of Mg, Ca or Sr in samples of saturated sodium chloride used in the production of chlorine and sodium hydroxide.

Reaction Kinetics and Viscosity Modelling in the Fusion Syntheses of Ca- and Ca/Mg-resinates

Rosin is a natural product from pine forests and it is used as a raw material in resinate syntheses. Resinates are polyvalent metal salts of rosin acids and especially Ca- and Ca/Mg- resinates find wide application in the printing ink industry. In this thesis, analytical methods were applied to increase general knowledge of resinate chemistry and the reaction kinetics was studied in order to model the non linear solution viscosity increase during resinate syntheses by the fusion method. Solution viscosity in toluene is an important quality factor for resinates to be used in printing inks. The concept of critical resinate concentration, c crit, was introduced to define an abrupt change in viscosity dependence on resinate concentration in the solution. The concept was then used to explain the non-inear solution viscosity increase during resinate syntheses. A semi empirical model with two estimated parameters was derived for the viscosity increase on the basis of apparent reaction kinetics. The model was used to control the viscosity and to predict the total reaction time of the resinate process. The kinetic data from the complex reaction media was obtained by acid value titration and by FTIR spectroscopic analyses using a conventional calibration method to measure the resinate concentration and the concentration of free rosin acids. A multivariate calibration method was successfully applied to make partial least square (PLS) models for monitoring acid value and solution viscosity in both mid-infrared (MIR) and near infrared (NIR) regions during the syntheses. The calibration models can be used for on line resinate process monitoring. In kinetic studies, two main reaction steps were observed during the syntheses. First a fast irreversible resination reaction occurs at 235 °C and then a slow thermal decarboxylation of rosin acids starts to take place at 265 °C. Rosin oil is formed during the decarboxylation reaction step causing significant mass loss as the rosin oil evaporates from the system while the viscosity increases to the target level. The mass balance of the syntheses was determined based on the resinate concentration increase during the decarboxylation reaction step. A mechanistic study of the decarboxylation reaction was based on the observation that resinate molecules are partly solvated by rosin acids during the syntheses. Different decarboxylation mechanisms were proposed for the free and solvating rosin acids. The deduced kinetic model supported the analytical data of the syntheses in a wide resinate concentration region, over a wide range of viscosity values and at different reaction temperatures. In addition, the application of the kinetic model to the modified resinate syntheses gave a good fit. A novel synthesis method with the addition of decarboxylated rosin (i.e. rosin oil) to the reaction mixture was introduced. The conversion of rosin acid to resinate was increased to the level necessary to obtain the target viscosity for the product at 235 °C. Due to a lower reaction temperature than in traditional fusion synthesis at 265 °C, thermal decarboxylation is avoided. As a consequence, the mass yield of the resinate syntheses can be increased from ca. 70% to almost 100% by recycling the added rosin oil.

Óxidos de ferro e monazita de areias de praias do Espírito Santo

Sand samples collected from two sampling sites on Guarapari and Iriri beaches, state of Espírito Santo, Brazil, were studied in an attempt to better describe their chemical and mineralogical compositions and radioactive behaviors. The sands were found to contain about 6 (Guarapari) and 2 dag kg-1 (Iriri) of rare earth and thorium that, if allocated to the monazite-(Ce) structure, lead to the averaged formulae Ce3+0,494Gd3+0,012La3+0,209Nd3+0,177Pr3+0,040Sm3+0,024Th4+0,033 (PO4) and Ce3+0,474La3+0,227Nd3+0,190Pr3+0,044Sm3+0,032Th4+0,024 (PO4). From Mössbauer spectroscopy data, the magnetic fractions of these sands were found to contain stoichiometric hematite (47.4 dag kg-1, from Guarapari, and 25.1 dag kg-1, from Iriri) and magnetite (44.1 and 58.8 dag kg-1). The specific alpha and beta radiation activities were also measured for both samples.

epiCentre!: rehabilitació de Ca n'Oliver com a centre d'art

Award-winning

Magnetic Perovskites Sr2FeMoO6 and La(1-x)Ca(x)MnO3: Synthesis, Fabrication and Characterization of Nanosized Powders and Thin Films

Due to font problem on the tilte field the titlte of the thesis is corrected here. The title of the thesis is: Magnetic Perovskites Sr₂FeMoO₆ and La_(1-x)Ca<sub>(x)MnO₃: Synthesis, Fabrication and Characterization of Nanosized Powders and Thin Films

Nutrientes (K, P, Ca, Na, Mg e Fe) em sedimentos (solos aluviais) e cultivares (feijão e milho) de praias e barrancos de rios de água branca: a bacia do purus no estado do Acre, Brasil

The present research highlights the macronutrient abundance in the sediments of beaches and cliffs and cultivates in the river Purus and flowing, southwest of Amazon. The concentrations found in leaves and bean seeds and corn leaves reflect the mineralogical and chemical nature of those rich sediments in K2O and Na2O, which are formed by smectite, illite and K-feldspar. The factors of transfer of the elements in the corn leaves and bean (Ca>K>Na) and bean seeds (Na>K>Ca) demonstrate that the nutrient needs of the cultivate were found appropriately in the sediments (soils) of the beaches and cliffs.