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Pigment analysis of Portuguese portrait miniatures of 17th and 18th centuries ...

Seventeen Portuguese miniature portraits on copper support from the Évora Museum collection (Portugal) were analyzed in situ and nondestructively by Raman microscopy (RM), SEM-EDS, and stereomicroscopy. This work constitutes a great breakthrough in the study of miniature paintings from the 17th and 18th centuries, since the chemical information known about this unique kind of paintings are still scarce, and in ...

Scientific objects in the exhibition CHIMICA

Secondary School André de Gouveia (ESAG) is frequently associated to Lyceu d’Évora from which it inherited the historical and cultural background. Lyceu d’Évora was established in 1841 after the educational reform of Passos Manuel and was set at Colégio do Espírito Santo, in Évora, until 1979. During that period, a physics and chemistry laboratory was created and developed at the Lyceu and it was enriched with ...

Scientific objects in the exhibition CHIMICA

Secondary School André de Gouveia (ESAG) is frequently associated to Liceu de Évora from which it inherited the historical and cultural background. Lyceu Nacional d’Évora was established in 1841 after the educational reform of Passos Manuel and was set at Colégio do Espírito Santo, in Évora, until 1979. During that period, a physics and chemistry laboratory was created and developed at the Liceu and it was enri...

Enzymatic systems as biomarkers of cultural heritage decay: A new approach to a...

Cultural Heritage decay is a serious problem with social and economic impact. Mural painting is one of the artistic expressions widely represented in Portugal, which over the time has suffered numerous forms of deterioration. Heritage decay depends on the physical properties and chemical nature of the materials, several environmental parameters and biological agents. The most harmful organisms involved in biode...

Enzymatic monitorization of mural paintings biodeterioration

Mural paintings is not only a form of art but also a way of learn more about our ancestral traditions - that´s why it´s so important to protected it from biodegradation. There are several factors that affect this artworks, such as environmental conditions, chemical nature of the substrate and biological agents.

Scientific objects in the exhibition CHIMICA

Secondary School André de Gouveia (ESAG) is frequently associated to Liceu de Évora from which it inherited the historical and cultural background. Lyceu Nacional d’Évora was established in 1841 after the educational reform of Passos Manuel and was set at Colégio do Espírito Santo, in Évora, until 1979. During that period, a physics and chemistry laboratory was created and developed at the Liceu and it was enri...

Extracting natural dyes from wool—an evaluation of extraction methods

The efficiency of eight different procedures used for the extraction of natural dyes was evaluated using contemporary wool samples dyed with cochineal, madder, woad, weld, brazilwood and logwood. Comparison was made based on the LC-DAD peak areas of the natural dye’s main components which had been extracted from the wool samples. Among the tested methods, an extraction procedure with Na2EDTA in water/DMF (1:1, ...

Climate change towards more arid conditions in SW Iberia during the Holocene

During Holocene, a limestone tuff system developed in the SW Iberia near the town of Tavira (Portugal). The system is characterized by a set of three dams built up by the precipitation of layered limestones. Each dam has a low-energy pond system upstream where fine grained detrital sediments accumulated. The stable isotopic composition (oxygen and carbon) of the limestone tuffs were studied in detail with the a...

Climate change towards more arid conditions in SW Iberia during the Holocene

JORNADAS 2010 DO DEPARTAMENTO DE QUÍMICA

No seguimento da recente restruturação da Universidade de Évora, consubstanciada pela entrada em vigor dos seus novos estatutos, coloca-se a toda a academia, em geral, e aos departamentos, em particular, uma imensa diversidade de desafios, que a todos exige grande determinação para os enfrentar e vencer. Na realidade, para além dos problemas decorrentes dos novos paradigmas do ensino superior que conduziram à r...