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survlab: Survival Model-Based Imputation for Laboratory Non-Detect Data
Pereira, Luís; Infante, Paulo; Ferreira, Teresa; Quaresma, Paulosurvlab provides functions for imputing non-detect values in environmental laboratory data using survival models (including Tobit models) with automatic distribution selection. Is designed specifically for working with analytical data where measurements fall below detection limits or limits of quantification (LOQ).
From Ink to Mockup: An Integrated Study of Historical Gall Ink Formulations and...
Nunes, Margarida; Vieira, Joana C.; Costa, Ana Paula; Cabral, Maria Emilia A.; Vieira, Bruno J.C.; Waerenborgh, João Carlos; Nogueira, Isabel I.S.Iron gall inks (IGIs) played a central role as a writing medium in Western countries, leaving behind a vast legacy and significant conservation challenges. This study presents a twofold methodological approach to investigate the physicochemical behaviour of IGI-based formulations found in historical Portuguese sources. Fresh and 6-month naturally aged precipitates and supernatant solutions (dried inks) were cha...
Citric acid as a safe alternative to oxalic acid in the Gomori reticulin techni...
Bento, Ana; Nascimento, Ana; Nobre, Sofia; Ferreira, Teresa; Borges-Ferro, Amadeu; Marques-Ramos, AnaThe use of oxalic acid is common in metallic impregnation techniques, where it serves as a reducing and bleaching agent for potassium permanganate. Given that oxalic acid is harmful to health, its replacement with another reagent is advantageous for healthcare professionals handling it in laboratory settings. Considering that citric acid can also reduce potassium permanganate, this study aimed to determine whet...
ECMWF Lightning Forecast in Mainland Portugal during Four Fire Seasons
Campos, Cátia; Couto, Flavio Tiago; Santos, Filippe L. M.; Rio, João; Ferreira, Teresa; Salgado, RuiThe study evaluated the ECMWF model ability in forecasting lightning in Portugal during four fire seasons (2019–2022). The evaluation was made based on lightning data from the national lightning detector network, which was aggregated into resolutions of 0.5° and 1° over 3 h periods and analyzed from statistical indices using two contingency tables. The results showed that the model overestimates the lightning o...
ECMWF lightning forecasts evaluation during fire seasons in Portugal
Campos, Cátia; Couto, Flavio Tiago; Santos, Filippe L. M.; Rio, João; Ferreira, Teresa; Salgado, RuiLightning represents only 5-10% of fire causes in Europe and 1-2% in Portugal and correctly predicting its occurrence can help to mitigate large forest fires. In 2016, the European Centre for Medium-Range Weather Forecasts (ECMWF) introduced a parametrization for lightning forecast. Therefore, aiming to assess the feasibility of using ECMWF forecasts in the context of natural wildfires, this study analyses the ...
Assessing ECMWF Lightning Forecast in Portugal during fire seasons
Campos, Cátia; Couto, Flavio Tiago; Santos, Filippe L. M.; Rio, João; Ferreira, Teresa; Purificação, Carolina; Salgado, RuiPortugal is one of the European countries that faces significant challenges with wildfires. While lightning-triggered natural fires constitute a minority compared to anthropogenic ones, accurate forecasting of lightning occurrences is crucial for effective prevention. The study assesses the ECMWF model's capability to predict lightning in Portugal over four fire seasons [2019-2022]. Observed lightning data was ...
The study of two impressive simulacra at Santa Casa da Misericórdia de Almada, ...
Ferreira, Teresa; Nunes, Margarida; Curto, Ana; Palmeirão, Joana; Manhita, Ana; Olival, Fernanda; Piorro, Luís; Monteiro, Paula; Vieira, EduardaSimulacra, or full-body reliquaries of corpi santi, have largely been overlooked in the discourse of the past century by the Church, the general public, and scholars. This work investigates two noteworthy cases among simulacra—two young individuals, St. Primogenita and St. Theodore—from Santa Casa da Misericórdia de Almada in Portugal. Based on a historical and analytical approach, the study examines the simula...
Exploring a forgotten heritage: the case study of Saint Vincent Martyr’s simula...
Palmeirão, Joana; Nunes, Margarida; Manhita, Ana; Curto, Ana; Piorro, Luís; Vieira, Eduarda; Ferreira, TeresaThe simulacrum of Saint Vincent Martyr, one of four corpi santi at the Major Seminary of Coimbra, Portugal, features Roman-origin bonesmounted in metallic frameworks and covered with intricate Baroque garments. Enshrined within the urn-altar in Saint Michael’s Chapel, its remains were exhumed from the Catacomb of Priscila and brought to Portugal in 1760 by Bishop Count D. Miguel da Anunciação. This study employ...
Polyoxometalate-Ionic Liquids for Mitigating the Effects of Iron Gall Ink Corro...
Nunes, Margarida; García-Orduña, Pilar; Atrián-Blasco, Elena; Costa Vieira, Joana; Costa, Ana Paula; Cabral Amaral, Maria Emília; Claro, AnaIron gall ink (IGI), renowned for its indelibility, was the most important writing ink in the Western world from the 15th to the late 19th century. However, it is now known that IGIs induce acid-catalyzed hydrolysis and iron-catalyzed oxidation of the cellulose in historical paper documents. These mechanisms of deterioration cause significant damage to the writing support materials, including color alteration a...
What do We Know about Microplastics Effects in Soil?
Pinto, Ana Paula; Ferreira, Teresa; Dordio, Ana V.; Carvalho, Alfredo Jorge Palace; Faria, Jorge M. S.In this century, climate change is unparalleled and the most sensitive environmental problem humanity faces, with potentially very serious consequences in the coming decades. Other important challenges include the urgent need to reduce the volume of pollutants discharged into various environmental compartments and mitigate the effects of their release on the functioning of natural ecosystems. In this context, p...