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- A argamassa betuminosa de corte hídrico aplicada nos edifícios tradicionais portuenses dos séculos XIX e XX. Estudo analítico no contexto da reabilitação do edificado urbanoPublication . Lier-Kluge, Andrea Carvalho; Vieira, Eduarda; Guedes, João Paulo Miranda; Frade, José Carlos
- As condições de conservação das reservas museológicas: estudo iInternacional e nacionalPublication . Gomes, Maria Fernando; Vieira, Eduarda; Casanovas, Luis Elias; Calvo, AnaFace aos novos paradigmas de visibilidade e acesso às coleções museológicas em reserva torna-se premente saber quais são de fato as condições de conservação em reserva. O presente trabalho pretende dar a conhecer a realidade de algumas instituições internacionais e nacionais com espaços de reserva visíveis e / ou visitáveis, ou com o sistema de armazenamento visível, que se disponibilizaram a colaborar neste projeto de investigação, o qual teve como instrumento de recolha de informação um questionário.
- ForewordPublication . Vieira, Eduarda; Moreira, Patrícia; Pintado, Manuela; Macchia, Andrea
- El estudio de la significancia y los indicadores de riesgo antrópicos para la preservación de colecciones de la memoria trágica en una exposición temporalPublication . Galán-Pérez, Ana; Vieira, EduardaLas colecciones procedentes de los hechos históricos en un contexto bélico como fueron los campos de concentración nazi de la II Guerra Mundial, poseen un valor cultural y social relevante como testimonio material de los hechos. Conseguir el equilibrio a partes iguales entre su accesibilidad social y su conservación es el principal reto al que se enfrentan los museos memoriales como el Museo Estatal de Auschwitz-Birkenau, al que hay que sumar todos los riesgos añadidos que suponen su cesión en una exposición temporal, especialmente aquellos riesgos con origen antrópico, sean fortuitos o intencionados. El análisis crítico de estos indicadores nos ayudará a reconocer las posibles emergencias y consiguientes daños en las colecciones de la memoria en tránsito y abordar su conservación desde la perspectiva de la sostenibilidad.
- Enzymatic degradation of fungal pigmentation from Wall painting’s isolatesPublication . Marco, A.; Moreira, P. R.; Pintado, M. E.; Vieira, EduardaEnzymatic discolouration of extracellular pigments produced in liquid media by a selected fungal isolate from Portuguese mural paintings was attempted both in solution and on solid support. A promising versatile peroxidase from Bjerkandera adusta was tested and presented interesting discolouration ability, although smaller than the values obtained with the use of hydrogen peroxide alone.
- Conservation of archaeological copper alloy artifacts from Al Ain National Museum collection: the role of desalinationPublication . Lois, Diego; Vieira, Eduarda; Bosetto, EleonoraAl Ain National Museum is in the city of Al Ain, within the Emirate of Abu Dhabi, United Arab Emirates. This museum preserves an excellent collection of copper alloy archeological objects from different archeological sites around Al Ain all dated from the Neolithic era. We have observed a high concentration of chloride salts in most objects, which favors their corrosion. We conjecture that this may be the case for most sites located in arid zones near the coast. This paper aims to highlight the desalination treatments used during the conservation project of these artifacts. Desalination was the central treatment to achieve their stabilization and to promote their preservation for as long as possible. While the B70 desalination system has proven to be quite effective; salts still remain on the objects. Therefore, relative humidity and temperature monitoring are required to avoid variations that could reactivate sealed chlorides inside the objects.
- A coleção de soldadinhos em acetato de celulose (SEGOM) do Museu Militar do Porto: problemática de conservação e definição de estratégias de mitigação de riscoPublication . Bragança, Aura; Pereira, Ana; Vieira, Eduarda
- Mapping lacunae for retouching paintings with computer graphics softwarePublication . Henriques, Frederico; Bailão, Ana; Bordalo, Rui; Gac, Agnès Le; Gonçalves, Alexandre; Cardeira, Liliana; Candeias, António; Vieira, EduardaThe objective of this paper is to present a workflow procedure to support the graphic recording of the operations performed during the retouching process involved in paintings. In this particular context, an orthophotography of a portrait painted on canvas from a university museum collection was used in Blender, a free and open-source 3D creation software suite. Blender uses an important metric coordination value, provided by the 3D workspace software that allows the areal characterization and numeric identification of each surface loss. The step-by-step procedure adopted to document and map lacunae in this artwork for subsequent retouching, is described.
- Basil essential oil as an alternative to commercial biocides against fungi associated with black stains in mural paintingPublication . Marco, Alexandra; Santos, Sandra; Caetano, Joaquim; Pintado, Manuela; Vieira, Eduarda; Moreira, Patrícia R.In northern Portugal it was identified that some mural paintings from the 15th and 16th centuries disclose a chromatic alteration in the form of black stains possibly of microbiological origin. In the search for its cause, samples were collected and microorganisms were isolated from selected areas of the pictorial sets of three case studies that displayed dark pigmentation. Four representative fungal isolates were selected due to their pigmentation and growth characteristics – Alternaria alternata, Alternaria tenuissima, TZ10.2.2 (possibly Pestaloptia sp.) and TZ8.2.2 (possibly Penicillium sp.). An attempt was made to encounter an innovative environmentally innocuous and green safe alternative biocide to replace the chemical-based toxic compounds currently in use. Essential oils with confirmed antifungal potential and seldom employed in the conservation of cultural heritage and even less in mural painting (Rosmarinus officinalis, Foeniculum vulgare, Citrus lemmon, Ocimum basilicum and Salvia officinalis), were tested against commercial biocides (Benzalkonium chloride, Preventol R80, CaSoPaL® and Durolith®), to evaluate their in vitro efficacy and the determination of the minimum inhibitory concentration. Basil was able to inhibit growth on all tested strains at 1.25 μl ml−1. From the commercial biocides, Benzalkonium chloride and Preventol R80 were the ones with the best performance but needed higher concentrations than basil to achieve the same result enabling this essential oil a useful alternative to commercial biocides. The literature regarding the use of essential oils in mural paintings is, apart from two known authors, practically non-existent making it a novel approach.
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