Mono(Eta(5)-cyclopentadienyl)metal(II) complexes with thienyl acetylide chromophores: synthesis, electrochemical studies, and first hyperpolarizabilities

A series of mono(eta(5)-cyclopentadienyl)metal-(II) complexes with nitro-substituted thienyl acetylide ligands of general formula [M(eta(5)-C5H5)(L)(C C{C4H2S}(n)NO2)] (M = Fe, L = kappa(2)-DPPE, n = 1,2; M = Ru, L = kappa(2)-DPPE, 2 PPh3, n = 1, 2; M = Ni, L = PPh3, n = 1, 2) has been synthesized and fully characterized by NMR, FT-IR, and UV-Vis spectroscopy. The electrochemical behavior of the complexes was explored by cyclic voltammetry. Quadratic hyperpolarizabilities (beta) of the complexes have been determined by hyper-Rayleigh scattering (HRS) measurements at 1500 nm. The effect of donor abilities of different organometallic fragments on the quadratic hyperpolarizabilities was studied and correlated with spectroscopic and electrochemical data. Density functional theory (DFT) and time-dependent DFT (TDDFT) calculations were employed to get a better understanding of the second-order nonlinear optical properties in these complexes. In this series, the complexity of the push pull systems is revealed; even so, several trends in the second-order hyperpolarizability can still be recognized. In particular, the overall data seem to indicate that the existence of other electronic transitions in addition to the main MLCT clearly controls the effectiveness of the organometallic donor ability on the second-order NLO properties of these push pull systems.

Primary bioreceptivity of limestones from the mediterranean basin to phototrophic microorganisms

Dissertação apresentada para a obtenção do grau de Doutor em Conservação e Restauro pela Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia

Growth of phototrophic biofilms from limestone monuments under laboratory conditions

International Biodeterioration & Biodegradation,xxx (2009) 1–8

The discovery of three lost ‘Salting’ carpets: science as a tool for revealing their history

Thesis presented at the Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, to obtain a Master degree in Conservation and Restoration,Specialization in Textiles

The materials, technique, conservation treatment and after-care of interior de um convento

Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para a obtenção do grau de Mestre em Conservação e Restauro, especialização em pintura sobre tela

Biological colonization on majolica glazed tiles: biodeterioration, bioreceptivity and mitigation strategies

The impact of microbial activity on the deterioration of cultural heritage is a well-recognized global problem. Glazed wall tiles constitute an important part of the worldwide cultural heritage. When exposed outdoors, biological colonization and consequently biodeterioration may occur. Few studies have dealt with this issue, as shown in the literature review on biodiversity, biodeterioration and bioreceptivity of architectural ceramic materials. Due to the lack of knowledge on the biodeteriogens affecting these assets, the characterization of microbial communities growing on Portuguese majolica glazed tiles, from Pena National Palace (Sintra, Portugal) and another from Casa da Pesca (Oeiras, Portugal) was carried out by culture and molecular biology techniques. Microbial communities were composed of microalgae, cyanobacteria, bacteria and fungi, including a new fungal species (Devriesia imbrexigena) described for the first time. Laboratory-based colonization experiments were performed to assess the biodeterioration patterns and bioreceptivity of glazed wall tiles produced in laboratory. Microorganisms previously identified on glazed tiles were inoculated on pristine and artificially aged tile models and incubated under laboratory conditions for 12 months. Phototrophic microorganisms were able to grow into glaze fissures and the tested fungus was able to form oxalates over the glaze. The bioreceptivity of artificially aged tiles was higher for phototrophic microorganisms than pristine tile models. A preliminary approach on mitigation strategies based on in situ application of commercial biocides and titanium dioxide (TiO2) nanoparticles on glazed tiles demonstrated that commercial biocides did not provide long term protection. In contrast, TiO2 treatment caused biofilm detachment. In addition, the use of TiO2 thin films on glazed wall tiles as a protective coating to prevent biological colonization was analysed under laboratorial conditions. Finally, conservation notes on tiles exposed to biological colonization were presented.

Requalificação do Palacete Manuel Rodrigues Alves: re – integração do Palacete no quotidiano da cidade

Dissertação de mestrado integrado em Arquitectura

Vejamen de Alfonso de Batres para la academia de 1638

Durante el mes de febrero de 1638 se celebraron en el palacio del Buen Retiro las fiestas de carnestolendas. Entre las actividades programadas, se realizó una academia literaria en la que participaron poetas y cortesanos. De ella se conservan tres vejámenes: el de Alfonso de Batres, el de Antonio Coello y el de Francisco de Rojas Zorrilla. En el presente artículo se analiza y edita críticamente el vejamen que Batres defendió ante sus majestades en el Salón Real del Retiro el 11 de febrero de 1638.

Serlianas durante el Renacimiento italiano y español: del triunfo de la religión católica al lenguaje imperial

This article presents a panoramic view of the development of the so-called serliana or Serlian motif throughout the Italian Renaissance, focusing on the most relevant examples in the architecture of that period. The use of this motif during the Early Renaissance was pioneered by Filippo Brunelleschi in religious buildings. As its employment become widespread in a range of different settings, architects frequently incorporated local building traditions. It was only during the last twenty years of the Quattrocento that Giuliano da Sangallo and Leonardo da Vinci adopted the Serlian arch in residential architecture designed for the ruling elites. Thanks to Bramante and other artists such as Raphael, Baldassare Peruzzi, Antonio da Sangallo the Younger and Giulio Romano, the motif was extraordinarily popular during the High Renaissance period. Ever-increasingly complex and monumental compositions eased the adaptation of the serliana to both exterior and interior spaces, and in works such as the design by Galeazzo Alessi in Genoa, the imperial connotation of the motif is clear. This process illustrates the progressive transfer from the religious to the courtly sphere, and, at the same time, the permeability between the sacred and the profane. During the sixteenth century, Spain too was at the European avant-garde, due to its contacts with Italy and the latest fashions, such as the employment of the serliana in residential architecture, were followed in the fortified palace at La Calahorra, the Vich palace in Valencia, or the palace of Charles V in Granada, as part of a complex iconography of power. Throughout the sixteenth century, the serliana featured in that specifically-Spanish typology, the monumental altarpiece or retablo, as well as in monumental tombs. Italy was certainly the leading force in the process and had an indisputable influence on Spanish art, but the latter would develop its own original solutions in the sixteenth century, which matched the innovative character of Italian creations.

L'activitat quotidiana d'un mestre de cases medieval. Bernat Gual, 1405-1453

[cat] En aquest article es repassa l'activitat del mestre de cases Bernat Gual, des que va signar un contracte d'aprenentatge amb el mestre d'aixa Domingo Ferrer, l'any 1405, fi ns que desapareix de la documentació municipal, l'any 1453. En aquests quaranta-vuit anys d'activitat, Gual es va fer càrrec de grans obres (com ara l'assut de Xerta-Tivenys), però també d'una gran quantitat de petits treballs, sempre al servei del Consell de la Ciutat. La seva tasca s'emmarca en el context arquitectònic de la Tortosa medieval, determinat per la catedral i el palau del bisbe, però també pel Pont de Barques, una important infraestructura de fusta que era conservada per artesans especialitzats.

El Palacio de Qasr ibn Wardan (Siria) y la evolución de la arquitectura palacial bizantina (siglos VI-XV)

El palacio conocido con el nombre de Qasr ibn Wardan se encuentra hoy día en el interior de la zona esteparia siria. Aunque nosotros nos vamos a centrar en el palacio en sí, en realidad es un complejo de edificios que también incluye una iglesia y un posible cuartel. Aparte del alto grado de conservación, su importancia radica en ser uno de los pocos ejemplos de arquitectura civil de época justinianea en todo Oriente Próximo. Redescubierto a finales del siglo xix, el palacio ha sido estudiado parcialmente desde entonces. Gracias a los trabajos de restauración llevados a cabo entre las décadas de 1970 y 1990, se pudieron volver a estudiar los restos, destacando en ello la obra de F. De’Maffei publicada en 1995. Nuestro trabajo pretende retomar el estudio de este edificio, ofrecer una restitución en 3D para una mejor comprensión de sus fases edilicias y plantear nuevas hipótesis acerca de las motivaciones que llevaron a su construcción a partir del año 561.

[16/7/20, salle de l'Albert Hall de Londres] match [de boxe entre] Tommy Burns [et Joe] Beckett : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60155

[16/7/20, salle de l'Albert Hall de Londres] match [de boxe entre] Tommy Burns [et Joe] Beckett : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60156

[16/7/20, salle de l'Albert Hall de Londres] match [de boxe entre] Tommy Burns [et Joe] Beckett : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60159