Stone consolidation experiments in rock art outcrops at the Côa Valley Archaeological Park, Portugal

info:eu-repo/semantics/publishedVersio

Métodos estatísticos para recuperação de informação

É abordado o problema dos modelos de recuperação de informação, sob o ponto de vista estatístico, no sentido de estabelecer relações entre os diferentes algoritmos e apresentar uma visão unificada dos diferentes modelos com base em métodos estatísticos. É proposta uma notação comum para os mesmos conceitos apresentados por modelos diferentes evitando-se assim a grande diversidade das notações existentes, identificando-se os requisitos para um índice flexível capaz de fornecer matéria-prima para todos os modelos de pesquisa com base nas propriedades estatísticas dos documentos.info:eu-repo/semantics/publishedVersio

Combinação de métodos para pesquisa de informação

Pretende-se investigar diversos caminhos para combinar métodos de pesquisa por forma a melhorar o desempenho dos sistemas, oferecendo uma nova perspectiva da investigação dos sistemas de pesquisa, à descoberta da melhor estratégia, propondo um método de combinação baseado na combinação de três modelos: Textual, ligações e de classificação.info:eu-repo/semantics/publishedVersio

Brasilidade romântico-revolucionária: o cinema novo e a busca da identidade nacional

In this paper, we present a look at the configuration of Brazilian cinema in the 1960s Thus, this look is built from the observation of the consequences of the feeling of romantic-revolutionary Brazilianness forged and shared by the artistic and cultural circles in vogue at the time, more specifically, the Cinema Novo members. Therefore, it is analyzed the overlap between aesthetic-cultural and socio-political processes and the related search for national identity in cinemaNeste trabalho, é apresentado um olhar sobre a configuração do cinema brasileiro nos anos 1960. Para tanto, esse olhar é construído a partir da observação dos desdobramentos do sentimento de brasilidade romântico-revolucionária forjado e compartilhado pelos meios artísticos e culturais em voga à época, mais especificamente, pelos integrantes do Cinema Novo. Nesse sentido, é analisada a imbricação entre processos estético-cultural e político-social e a correlata busca pela identidade nacional no cinema

Volumetric and chromatic reintegration in conservation of in situ glazed tiles

Volumetric and chromatic reintegration is one of the most important but challenging treatments in conservation of in situ glazed tiles due to the need to protect them from water intrusion and further deterioration despise the demanding conditions and requirements needed in outdoor exposure. A set of six infill pastes based on aerial lime, hydraulic lime, aerial lime plus vinylic resin, epoxy resin and polyester resin binders was selected based on materials applied in previously reported interventions and the experience of professionals working in the field. The laboratory studies included the characterization of the infill pastes with and without chromatic reintegration/coating layer (SEM, MIP, porosity, water absorption, water vapour permeability, adhesion to the ceramic) and their behaviour after cure, artificial ageing (salt ageing, UV-Temp-RH cycles) and natural ageing. The results obtained allowed to formulate some considerations about these materials, their different characteristics and their performance when applied in the infill of architectural tile lacunae. The laboratory results have been compared with the performance of similar treatments surveyed on sites where they had been applied

Comparison of iodine content in dairy products and non-dairy beverages consumed in Portugal

Os lacticínios per tencem ao grupo de alimentos com maior teor de iodo. Atualmente, cada vez mais a população por tuguesa está a substituir os lacticínios por bebidas vegetais. Como estas bebidas têm geralmente teores de iodo baixo, leva-nos a uma preocupação acrescida sobre o impacto desta popularidade das bebidas vegetais nas necessidades de iodo nos consumidores. O iodo é um micronutriente essencial para a síntese das hormonas da tireoide, presente em pequenas quantidades no corpo humano. O principal objetivo deste trabalho foi a determinação de iodo em lacticínios e bebidas vegetais consumidas em Por tugal. A metodologia escolhida para a quantificação deste nutriente foi a espectrometria de massa acoplada a plasma indutivo (ICP-MS) precedida por extração em meio básico com placa de aquecimento de grafite. Foram analisadas 41 amostras, 15 leites, 20 iogur tes e 6 bebidas vegetais comercializadas por marcas de grande aceitação pela população por tuguesa. Verificou-se que os iogur tes apresentavam maiores concentrações de iodo, seguido do leite e por fim, as bebidas vegetais. Estas apresentaram na sua maioria valores inferiores ao limite de quantificação. Estes resultados levam-nos a concluir que as populações com dietas restritas em lacticínios (intolerância à lactose, alergia à proteína do leite ou vegans) poderão ter um risco acrescido de uma ingestão inadequada em iodo.Dair y products belong to the food group with higher iodine content. Nowadays, the Por tuguese population is increasingly replacing dair y products for non-dair y beverages. As these beverages are generally low in iodine content, it leads to an impact on iodine status in consumers due to an increased popularity of non-dair y beverages. Iodine is an essential micronutrient for the synthesis of thyroid hormones, present in small amounts in the human body. The main objective of this work was the determination of iodine in dair y products and non-dair y beverages consumed in Por tugal. The methodology for the quantification of this nutrient was inductively coupled plasma mass spectrometr y (ICP-MS) preceded by basic ex traction in graphite heating block. We analysed 41 samples, 15 milks, 20 yoghur ts and 6 non-dair y beverages marketed by brands of great acceptance by the Portuguese population. Yoghur ts had higher iodine concentrations, followed by milk and finally non-dair y beverages. Most of non-dair y beverages presented values below the limit of quantification. Therefore, populations with restricted diets in dair y products (lactose intolerance, milk protein allergy or vegans) may lead to an inadequate intake of iodine.info:eu-repo/semantics/publishedVersio

Histomorfologia intestinal de Pseudoplatystoma fasciatum alimentado com colostro bovino como fonte de proteína e peptídeos bioativos

Histological responses of the intestine are key for evaluating nutritional value of feed ingredients, since the organ is not only the chief site of feed digestion and nutrient absorption but also plays an important immunological function. Histomorphological alterations were evaluated in the intestine of juvenile striped catfish, Pseudoplatystoma fasciatum, fed diets containing 0 (control), 10 or 20% inclusion of lyophilized bovine colostrum (LBC), as source of protein or bioactive peptides, for either 30 or 60 days. Fish fed 20LBC presented at 60d a distinct pattern of macrophages and, some of them, higher number of vacuoles in rectum mucosa. The thickness of the muscle layer (TML) in fish fed diets with LBC was higher in the first portion of medium intestine than fish fed 0LBC. All fish presented significant increase of TML in the second portion of medium intestine along feeding period, but fish fed 20LBC had smaller values of TML than those of fish fed 0 and 10LBC which might be related to the higher intestinal coefficient found for this group. The TML of rectum was higher just for fish fed 10LBC. Dietary LBC altered morphometrical features of juvenile striped catfish intestine and possibly induced inflammatory reaction in the rectal mucosa, as a function of level of inclusion, feeding period and segment of intestine analyzed.Respostas histológicas do intestino são fundamentais para avaliar o valor nutritivo de ingredientes alimentares, uma vez que o órgão não é só o principal local de digestão e absorção dos nutrientes, mas também exerce uma importante função imunológica. Alterações histomorfológicas foram avaliadas no intestino de juvenis de cachara, Pseudoplatystoma fasciatum, alimentado com dietas contendo 0 (controle), 10 e 20% de inclusão de colostro bovino liofilizado (CBL) como fonte de proteína e peptídeos bioativos, aos 30 e 60 dias. Aos 60 dias, peixes alimentados com 20CBL apresentaram macrófagos de aspecto distinto e alguns, uma grande concentração de vacúolos na mucosa retal. A espessura da camada muscular (ECM) em peixes alimentados com CBL foi maior na primeira porção do intestino médio em relação àqueles alimentados com 0CBL. Ao longo do período experimental, todos os peixes mostraram aumento significativo na ECM na segunda porção do intestino médio, entretanto peixes do grupo 20CBL tiveram menores valores para a ECM do que os demais, o que pode estar relacionado com o maior coeficiente intestinal encontrado para este grupo. A ECM no reto foi maior apenas para os peixes alimentados com 10CBL. A inclusão de CBL na dieta do cachara alterou características morfométricas do intestino e, possivelmente, induziu uma reação inflamatória na mucosa retal em função do nível de inclusão, período de alimentação e porção do intestino analisada.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

Study of Calcium Ethoxide as a New Product for Conservation of Historical Limestone

The combination of multiple physical, chemical and biological factors causes the weathering of limestone used in the field of cultural heritage. To overcome the limitations of traditional consolidating products and to meet the requirements of the historical building substrates, during the European collaborative project NANOMATCH, alkaline earth alkoxides were developed and studied as consolidating agents for limestone. Among these new products, calcium ethoxide, with the formula Ca(OEt)2, was chosen for this study and investigated in depth as an alternative consolidating treatment. It was first characterized through a study of the carbonation process: its kinetics, reaction pathway and the evaluation of formed mineralogical phases. Subsequently, it was applied on limestones with different total open porosity to test its performance as a consolidating agent. The compatibility and the efficiency of the treatment were investigated with a multi-technique approach and compared with results obtained with a reference product, based on nanolime. This study indicates that calcium ethoxide shows better results with respect to the reference product, both in terms of compatibility and consolidation effect

Nutritional aspects and lifestyle related to depressive symptoms: a case-control study

Depression is a mental condition that affects more than 322 million people worldwide. The nutritional status of individuals diagnosed with depression may change. Individuals with depression may experience changes in eating habits and weight changes. The main objective of this study is to relate the nutritional aspect and lifestyle of depressive patients with the symptoms presented. Through a case-control study, nutritional status, depressive symptoms with the Beck II Inventory, physical activity, tobacco and alcohol consumption, and family history were investigated. The sample consisted of 389 individuals (217 depressive and 172 controls) with a mean age of 45.6±15.6 years (range 16 to 83 years), most of them female (78.1%). In the results obtained, most patients with depression had severe symptoms of depression. Depression was associated with a higher body mass index (BMI) and obesity. Patients with depression were less likely to consume alcohol but more likely to smoke. It is concluded that individuals with depression have a higher prevalence of overweight, smoking, family history of depression and use of medications. A multidisciplinary approach is critical for treating depression and improving patients' quality of life

Calcium Ethoxide as Consolidant for Porous Limestones: Influence of the Solvent

Calcium ethoxide nanosuspension, a consolidating product developed during the European Nanomatch project, is here modified by adding two different solvents, 2-butanol and n-butylacetate, chosen for their different boiling points with respect to ethanol, the solvent employed in a previous work to dilute the original product. Fourier transform infrared spectroscopy (µFT-IR) was used to understand how the presence of these new solvents can influence the kinetics of the carbonation process and the pathway reaction. Furthermore, coatings derived from nanosuspensions were maintained for specific time intervals at controlled relative humidity conditions (RH = 50% and RH = 90%); the formed mineralogical phases were characterized by µFT-IR and X-ray diffraction (XRD). Results indicate that the used solvents can influence the kinetic and reaction pathways, while the phases formed at the end of the carbonation process are influenced by both solvents and RH conditions. The effectiveness of calcium ethoxide based product diluted in 2-butanol and n-butylacetate as limestone consolidants was evaluated with drilling resistance measurement system (DRMS) and ultrasound pulse velocity (UPV). The impact on color coordinates was also assessed. The results were compared with those obtained with the same product diluted in ethanol and a commercial nanolime. The use of these solvents gave different and better results in terms of efficac