13 documents found, page 1 of 2
“On the use of in-situ spectroscopic techniques for the study of the provenance...
Parungao, Dorothy; Candeias, Antonio; Lopes, J.A.; Miguel, CatarinaIvory trafficking is a multifaceted problem that has long endangered the fate of African and Asian ele- phants. In field investigations, it is essential to conduct ivory inspections in a nondestructive manner to prevent the inclusion of noncompliant materials. In this research, a practical approach to identify Asian and African elephants’ ivories was developed using an integrated methodology of art history, vibra...
A Multi-Analytical Characterization of Mortars from Kathmandu (Nepal) Historica...
Tsoupra, Tsoupra; Maharjan, Monalisa; Teixeira, Dora; Candeias, Antonio; Galacho, Cristina; Moita, PatríciaThe historical monuments of the ‘City of Temples’ (Kathmandu) represent an intrinsic component of Nepal’s cultural heritage. The 2015 devastating Gorkha earthquake, besides human casualties, has led to a widespread demolition or partial damage of monuments at UNESCOWorld Heritage Sites, including the ones in Durbar squares. This study, through an integrated material characterization of masonry binders, used in ...
On the conservation of easel paintings: evaluation of microbialcontamination an...
Salvador, Cátia; Bordalo, Rui; Silva, Mara; Rosado, Tânia; Candeias, Antonio; Caldeira, A TeresaEasel paintings have been considered one of the most important art expressions, constituting today outstanding works of art with important historic and cultural value. Unfortunately, due to the presence of several organic materials, these artworks have been affected by microbial contamination that among other factors can be responsible for different aesthetic and structural alterations. For this study, four eas...
Microorganisms and the integrated conservation-intervention process ofthe renai...
Rosado, T; Silva, M; Dias, L; Candeias, Antonio; Gil, Milene; Mirão, J; Pestana, J; Caldeira, A TeresaThe identification of microorganisms involved in biodeterioration/biodegradation process is determinant to understand their effects on cultural assets, and furthermore, it is a crucial step to define an efficient strategy to protect monuments and artworks from microbiological recolonisation, in order to promote its preservation. The renaissance mural paintings from the garden of the Inquisition Palace in Évora,...
Green mitigation strategy for cultural heritage: bacterial potential for biocid...
Silva, M; Rosado, T; Teixeira, Dora; Candeias, Antonio; Caldeira, A TeresaSeveral biosurfactants with antagonistic activity are produced by a variety of microorganisms. Lipopeptides (LPPs) produced by some Bacillus strains, including surfactin, fengycin and iturin are synthesized nonribosomally by mega-peptide synthetase (NRPS) units and they are particularly relevant as antifungal agents. Characterisation, identification and evaluation of the potentials of several bacterial isolates...
A first insight on the biodegradation of limestone: the case of the World Herit...
Rosado, T; Silva, M; Galvão, A; Mirão, J; Candeias, Antonio; Caldeira, A TeresaThe present study is a multidisciplinary approach applied to architectural stone materials of the Convent of Christ in Tomar (Portugal) in order to understand and mitigate the active decay processes. The structure and appearance of the stonework from the Convent of Christ are strongly affected by stains, biofilms and structural degradation. To investigate these phenomena, a multianalytical approach comprising X...
New insight on the underdrawing of 16th Flemish-Portuguese easel paintings by c...
Valadas, Sara; Freire, Rita; Cardoso, Ana; Mirao, Jose; Vandenabeele, Peter; Caetano, Joaquim; Candeias, AntonioThis paper focusses on the study of the underdrawings of 16th century easel paintings attributed to the workshop of the Portuguese-Flemish Master Frei Carlos. This investigation encompasses multidisciplinary research that relates the results of surface exams (infrared reflectography, standard light photography and infrared photography) with analytical investigations. The surface analysis of Frei Carlos’ underdr...
Calcium sulfate fillers and binders in Portuguese 15th and 16th centuries: Grou...
Antunes, Vanessa; Candeias, Antonio; Oliveira, Maria Jose; Lorena, Merces; Seruya, Ana Isabel; Carvalho, Maria Luisa; Gil, Milene; Mirao, JoseThis study presents results on a developed methodology to characterize ground layers in Portuguese workshops. In this work a set of altarpieces of the 15th and 16th centuries, assigned to Coimbra painting workshop was studied, overall the masters Vicente Gil (doc. Coimbra 1498–1525), Manuel Vicente (doc. Coimbra 1521–1530) and Bernardo Manuel (act. c. 1559–94), father, son and grandson, encompassing from late g...
A bridge between liquid-liquid extraction and the use of bacterial communities ...
Assunção, Ana; Matos, Ana; Costa, Ana M. Rosa da; Candeias, Antonio; Costa, Maria ClaraThe Platinum Group Metals (PGM) are rare in the Earth's crust and in the past years their use had a considerable expansion limiting their availability, which justifies PGM's high commercial value and demand. Therefore, PGM recovery from secondary sources is very important from both economic and environmental points of view. In recent years, several methods for PGM removal have been investigated. Our research gr...
Considerações sobre o estudo de Pintura - A Experiência do Laboratório José de ...
Candeias, Antonio; Carvalho, GabrielaConsiderações sobre o estudo de pintura – a experiência do Laboratório José de Figueiredo