10 documents found, page 1 of 1
Testing the feasibility of titanium dioxide sol-gel coatings on portuguese glaz...
Coutinho, ML; Veiga, J.P.; Macedo, M.F.; Miller, Ana ZéliaHistorical glazed wall tiles are a unique vehicle of artistic expression that can be found outdoors, integrating the buildings of many countries, therefore they are often subjected to biodeterioration. In this work, the applicability of protective coatings on glazed tiles to prevent biological colonization was evaluated. Thin films of titanium dioxide (TiO2) obtained by sol-gel were applied on glazed tiles to a...
Biodeterioration of glass-based historical building materials: An overview of t...
Macedo, M.F.; Vilarigues, M.; Coutinho, M.L.The main goal of this work was to review the 21st century literature (2000 to 2021) re-garding the biological colonisation and biodeterioration of glass-based historical building materials, particularly stained glass and glazed tiles. One of the main objectives of this work was to list and systematize the glass-colonising microorganisms identified on stained glass and glazed tiles. Biodiversity data indicate th...
A transparent dialogue between iconography and chemical characterisation: a set...
Rodrigues, A.; Coutinho, M.L.; Machado, A.; Martinho, B.A.; Cerqueira-Alves, L; Macedo, M.F.; Vilarigues, M.This work presents the first results of the iconographic study and analytical characterisation of a set of four stained-glass panels that are part of the collection of National Palace of Pena (Sintra, Portugal). These panels were collected by the King Ferdinand II in the mid-nineteenth century, for his main residence the Palace of Necessidades (Lisbon, Portugal), and only first presented to the general public i...
Biodeterioration of majolica tiles by the fungus Devriesia imbrexigena
Coutinho, M.L.; Miller, A.Z.; Phillips, A.; Mirão, J.; Dias, L.; Rogerio-Candelera, M.A.; Saiz-Jimenez, C.; Martin-Sanchez, P.M.; Cerqueira-Alves, L.This study aimed at evaluating the influence of ageing on the bioreceptivity and biodeterioration of glazed tiles by fungi. These microorganisms have been identified in historical tile colonizing microbial communities. A 12-month laboratory colonization experiment was conducted using pristine and artificially aged tile models inoculated with Devriesia imbrexigena. Fungal growth was evaluated by digital image an...
Estudo de Comunidades Fúngicas em Arquivos: Implicações na Conservação e na Saúde
Pinheiro, A.C.; Viegas, C.; Jurado, V.; Sabino, R.; Veríssimo, C.; Rosado, L.; Macedo, M.F.A influência da contaminação fúngica para a saúde ambiental e para a conservação do património é o tema premente e actual que suscitou a hipótese de estudo aqui apresentada. Os fungos, dada a sua extrema capacidade de adaptação, podem colonizar diversos materiais – orgânicos ou não – e a sua acção pode ser mecânica, por intermédio das suas hifas ou química, através dos seus metabolitos.Em termos de conservação ...
Mould and yeast identification in archival settings: Preliminary results on the...
Pinheiro, Ana Catarina; Macedo, M.F.; Jurado, V.; Saiz-Jimenez, C.; Viegas, Carla; Brandão, João; Rosado, LauraThis project was developed to fully assess the indoor air quality in archives and libraries from a fungal flora point of view. It uses classical methodologies such as traditional culture media e for the viable fungi e and modern molecular biology protocols, especially relevant to assess the non-viable fraction of the biological contaminants. Denaturing high-performance liquid chromatography (DHPLC) has emerged ...
The relationship between phytoplankton diversity and community function in a co...
Duarte, Pedro; Macedo, M.F.; Cancela da Fonseca, LuísThe decrease of biodiversity related to the phenomena of global climate change is stimulating the scientific community towards a better understanding of the relationships between biodiversity and ecosystem functioning. In ecosystems where marked biodiversity changes occur at seasonal time scales, it is easier to relate them with ecosystem functioning. The objective of this work is to analyse the relationship be...
Analysis of coastal lagoon metabolism as a basis for management
Duarte, Pedro; Macedo, M.F.; Calado, Gonçalo; Cancela da Fonseca, Luís; Bernardo, João; Costa, AnaThis work was carried out in a shallow eutrophic coastal lagoon (St. André lagoon, SW Portugal) which is artificially opened to the sea each year in early spring. Macrophytes, mainly Ruppia cirrhosa, are keystone species in this ecosystem covering up to 60% of its total area with peak biomasses over 500 g DWm−2. The main objectives were to study ecosystem metabolism, to evaluate the metabolic contribution to th...
The influence of incubation periods on photosynthesis–irradiance curves
Macedo, M.F.; Duarte, Pedro; Ferreira, JoãoIn phytoplankton primary production studies, samples for the determination of photosynthesis versus irradiance relationship ( P–I) are usually incubated at several irradiance levels during a fixed time period, commonly 2–4 h. However, it is not clear if the use of this fixed incubation time is appropriate to study the P–I relationship in any given ecosystem. The aim of this work was to study the influence of in...
Analysis of the deep chlorophyll maximum across the Azores Front
Macedo, M.F.; Duarte, Pedro; Ferreira, João; Alves, M.; Costa, V.Physical, chemical and biological observations made in late July and August 1997 across the Azores Front (37ºN, 32ºW to 32ºN, 29ºW) are presented. The objectives of the study were: (1) to analyse horizontal and vertical profiles of temperature, salinity, density, nutrients and chlorophyll-a (Chl a) of the top 350 m; (2) to identify the main differences in the deep Chl a Maximum (DCM) and hydrographic structure ...