30 documents found, page 1 of 3
Antimicrobial chitosan/TPP-based coatings for the prevention of biodeterioratio...
Silva, Nádia C.; Castro, Diana; Neto, Cláudia; Madureira, Ana Raquel; Pintado, Manuela; Moreira, Patrícia R.Outdoor stone sculptures are prone to accelerated deterioration caused by the proliferation of microorganisms in the stone. The physical, chemical and mechanical action of microorganisms on stone heritage causes aesthetic and structural changes that devalue the artworks over time. Developing more sustainable and ecological alternatives for their preventive conservation is necessary to reduce the negative enviro...
Chitosan coatings reinforced with cellulose crystals and oregano essential oil ...
Silva, Nádia C.; Madureira, Ana Raquel; Pintado, Manuela; Moreira, Patrícia R.The proliferation of microorganisms in outdoor stone sculptures and cultural objects can damage the structure and aesthetics of the materials through biodeterioration mechanisms. Biocides and synthetic products are often used to prevent this phenomenon, despite their negative impact on the environment and human health. Less toxic alternatives with reduced environmental impact can be an option for the preventive...
Enhancing the detection of Dinophysis spp. using electrochemical genosensors
Pereira, Eduarda; Silva, Aurora; Morais, Stephanie L.; Costa-Rama, Estefanía; Moreira, Patrícia R.; Fraga-Corral, M.; Torrado, Ana M.Background: Harmful algal blooms (HABs) pose a significant threat to the environment and public health. These blooms are defined by an accumulation of microscopic algae in water, and they can occur in lakes, rivers, estuaries, or coastal areas. Factors like the unregulated runoff of agricultural and industrial wastes into the aquatic environment [1] are believed to have transformed these ecosystems into favorab...
Is it possible to prevent Harmful Algal Blooms? An electrochemical genosensor t...
Pereira, Eduarda; Silva, Aurora; Morais, Stephanie L.; Costa-Rama, Estefanía; Moreira, Patrícia R.; Fraga-Corral, M.; Torrado, Ana M.Harmful Algal Blooms (HABs) are a very common phenomenon in the last few years that results from the accumulation of microalgae, such as dinoflagellates of the Dinophysis genus. Hence, the development of analytical technologies capable of detecting these microorganisms and thereby avoiding environmental and public health crisis, has become a major priority. Biosensors have been gaining recognition lately given ...
Enhancing the detection of Dinophysis spp. using electrochemical genosensors
Pereira, Eduarda; Silva, Aurora; Morais, Stephanie L.; Costa-Rama, Estefanía; Moreira, Patrícia R.; Fraga-Corral, M.; Torrado, Ana M.Harmful algal blooms (HABs) pose a significant threat to the environment and public health. These blooms are defined by an accumulation of microscopic algae in water, and they can occur inlakes, rivers, estuaries, orcoastal areas. Factors like the unregulated runoff of agricultural and industrial wastes into the aquatic environment are believed to have transformed these ecosystems into favorable habitats for al...
Sampling methods for outdoor sculptures: comparison of swabs and cryogels by fl...
Silva, Nádia C.; Pintado, Manuela; Moreira, Patrícia R.Flow cytometry was evaluated for the first time for the microbiological characterisation of samples collected from the surfaces of stone and mortar sculptures. The study was carried out on outdoor sculptures located in the district of Porto (Portugal), from which samples were collected using swabs and poly(2-hydroxyethylmethacrylate) (poly(HEMA)) cryogels as non-invasive sampling methods. The use of poly(HEMA) ...
GIS technology for documentation of wall paintings in northern Portugal with a ...
Marco, Alexandra; Henriques, Frederico; Vieira, Eduarda; Pintado, Manuela; Moreira, Patrícia R.We often come across a problem of deterioration in some 15th and 16th century mural painting (MP) ensembles on the inner walls of granitic Romanesque religious buildings in the north of Portugal (fig. 1). It is manifested by the presence of dark pigmentation staining both granite supports and mural paintings (Marco, 2016 and 2019). The origin of this phenomenon is unknown and may be due to synergy of factors su...
A coleção científica do Museu do ISEP: as Pilhas de Grenet e Leclanché
Cadeco, Guilhermina; Costa, Patrícia; Campos, Bruno B.; Algarra, Manuel; Martínez de Yuso, Maria Valle; Moreira, Patrícia R.; Silva, PauloO Museu do Instituto Superior de Engenharia do Porto (ISEP), criado em 1999, guarda a memória do ensino industrial da segunda metade do século XIX. Um ensino muito direcionado para a prática do conhecimento que recorria a modelos e instrumentos como metodologia. O acervo museológico é constituído por três grandes coleções: objetos, estampas/desenhos e fotografias, num total de 10000 peças, aproximadamente. A co...
Rare Biogeochemical Phenomenon Associated to Manganese Patinas on Mural Paintin...
Campos, Bruno; Marco, Alexandra; Freire-Lista, David Martín; Durães, Nuno; Silvestre-Albero, Joaquin; da Silva, Eduardo Ferreira; Vieira, EduardaThis article discloses a rare and outstanding type of Mn-rich black-blue patina found on mural painting and granite ashlars located in the church of Sta. Marinha, north of Portugal, and conjectures the phenomenon associated to the appearance of such patinas in different surface materials. This Mn-patina reported on mural painting and their origin is probably assigned to manganese leaching from building material...
Rare biogeochemical phenomenon associated to manganese patinas on mural paintin...
Campos, Bruno; Marco, Alexandra; Freire-Lista, David M.; Durães, Nuno; Silvestre-Albero, Joaquin; Silva, Eduardo Ferreira da; Vieira, EduardaThis article discloses a rare and outstanding type of Mn-rich black-blue patina found on mural painting and granite ashlars located in the church of Sta. Marinha, north of Portugal, and conjectures the phenomenon associated to the appearance of such patinas in different surface materials. This Mn-patina reported on mural painting and their origin is probably assigned to manganese leaching from building material...