Argamassa de reboco reforçada com resíduos da indústria têxtil do tipo fio

Este trabalho de investigação pretende estudar o efeito da incorporação de fibras de resíduos da indústria têxtil nas argamassas de reboco e auscultar o potencial deste material compósito. Neste caso, os resíduos da indústria têxtil considerados são fios ou pedaços de tecido ou malhas, e poderão ter uma grande variabilidade material (e.g. composição, espessura, densidade, entre outras). Aspectos relacionados com o traço, o tamanho das fibras e a percentagem de fibras a incorporar são importantes contemplar neste estudo. Nesta fase deste trabalho de investigação, apenas se considerou a inclusão de fio com a composição de 30% de algodão e de 70% de acrílico. Amostras de argamassa de traço 1:1:6 (cimento:cal hidráulica:areia), reforçada com fibras deste fio, de tamanho de 20 mm e 40 mm, e com as percentagens de 0%, 1%, 2%, 3% e 4% foram fabricadas. Estas amostras foram depois ensaiadas à compressão e à flexão em três pontos. Os resultados experimentais permitiram verificar que existe uma melhoria notável das capacidades resistentes à compressão e à flexão do material à medida que a percentagem de fibras aumenta. Atendendo a que patologias de argamassa de reboco do tipo fissuração contínua a ser um grave problema que as nossas construções apresentam, incluindo as recentemente concluídas, este estudo poderá dar um contributo técnico na solução desta problemática, num contexto sustentável e económico

Minimally invasive treatment of gastric GIST by endo-laparoscopy

The gastrointestinal stromal tumor,s (GISTs) are the most common mesenchymal tumours of the gastrointestinal tract. Surgery is the primary therapeutic approach. Objective: To present the results of patients undergoing combined endo-laparoscopic (ELC) approach as a minimally invasive treatment for gastric GIST

Caracterização física da bacia de contribuição da Estação de Tratamento de Água Sinnott por meio de geoprocessamento.

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Role of the Renin Angiotensin System in Blood Pressure Allostasis-induced by Severe Food Restriction in Female Fischer rats

Severe food restriction (FR) is associated with blood pressure (BP) and cardiovascular dysfunction. The renin-angiotensin system (RAS) regulates BP and its dysregulation contributes to impaired cardiovascular function. Female Fischer rats were maintained on a control (CT) or severe FR (40% of CT) diet for 14 days. In response to severe FR, BP allostasis was achieved by up-regulating circulating Ang-[1-8] by 1.3-fold through increased angiotensin converting enzyme (ACE) activity and by increasing the expression of AT1Rs 1.7-fold in mesenteric vessels. Activation of the RAS countered the depressor effect of the severe plasma volume reduction (≥30%). The RAS, however, still underperformed as evidenced by reduced pressor responses to Ang-[1-8] even though AT1Rs were still responsive to the depressor effects of an AT1R antagonist. The aldosterone (ALDO) response was also inadequate as no changes in plasma ALDO were observed after the large fall in plasma volume. These findings have implications for individuals who have experienced a period(s) of severe FR (e.g., anorexia nervosa, dieters, natural disasters) and suggests increased activity of the RAS in order to achieve allostasis contributes to the cardiovascular dysfunction associated with inadequate food intake

Avaliação do estado nutricional do dendezeiro: análise foliar (reformulada).

Avaliação do estado nutricional do dendezeiro. Sintomas e causas de deficiências nutricionais do dendezeiro. Diagnóstico foliar do dendezeiro. Amostragem das folhas para análise química. Definição das quadras homogêneas. Época para amostragem foliar. Número de plantas a serem amostradas. Escolha da folha para amostragem. Filotaxia do dendezeiro. Coleta dos folíolos e identificação da amostra. Preparo e acondicionamento das amostras. Fatores envolvidos na interpretação dos resultados. Nível crítico dos elementos. Interação entre os elementos minerais. Adubação do dendezeiro para as condições da Amazônia Ocidental. Curvas de resposta. Adubação no campo.bitstream/item/64264/1/CircTec-26-2006.pd

Sex differences in axial spondyloarthritis: data from a Portuguese spondyloarthritis cohort

Background: Axial spondyloarthritis (axSpA), particularly ankylosing spondylitis was historically considered a male’s disease and has been under-recognized in women. Emerging evidence reveals sex differences in pathophysiology, disease presentation and therapeutic efficacy. Objective: To identify differences between sexes in a Portuguese cohort of patients with axSpA regarding clinical manifestations, disease activity, functional capacity, patient related outcomes and presence of sacroiliitis on x-ray or magnetic resonance imaging. Methods: Patients with ≥18 years fulfilling the ASAS- Assessment of Spondyloarthritis International Society classification criteria for axSpA registered in the electronic Rheumatic Diseases Portuguese Register (Reuma.pt) were included in this multicentric cross-sectional study. Sociodemographic data, clinical features and imaging were collected from the first record in Reuma.pt. These variables were compared between sexes using Mann-Whitney test and Chi-Square test. Variables with a significant association with variable sex were considered in the multiple variable analysis to adjust the sex effect on the outcome variables. Statistical analysis was performed with R version 4.0.2 and p<0.05 was considered statistically significant. Results: A total of 1995 patients were included, 1114 (55.9%) men and 881 (44.1%) women. Men had an earlier disease onset (25.1 vs 28.4, p<0.001), were younger at diagnosis (26.9 vs 30.4, p<0.001) and were more frequently smokers (32.1% vs 15.7%, p<0.001). Comparing to women, men had worse Bath Ankylosing Spondylitis Metrological Index scores (4.0 vs 3.4, p<0.001), higher levels of C-Reactive Protein (10.5 vs 6.9 mg/L, p<0.001) and were more often Human Leukocyte Antigen-B27 positive (67.8% vs 54%, p<0.001). In contrast, women more frequently had inflammatory bowel disease (8.8% vs 4.9%, p=0.004), higher levels of erythrocyte sedimentation rate (25.0 vs 21.0mm/h, p=0.003) and worse patient-related outcomes- Bath Ankylosing Spondylitis Disease Activity Index (5.7 vs 4.5, p<0.001), Patient Global Assessment (60.0 vs 50.0, p<0.001) and fatigue (6.2 vs 5.0, p<0.001). Discussion: In this large multicentric study from a Portuguese axSpA cohort, we confirmed sex differences in patients with axSpA. This work brings awareness to these differences, resulting in less underdiagnosis and misdiagnosis, optimizing treatment strategies, and improving outcomes in axSpA.publishe

Avaliação do estado nutricional do dendezeiro: análise foliar.

Avaliação do estado nutricional do dendezeiro. Sintomas de deficiência. Diagnóstico foliar do dendezeiro. Fatores envolvidos na interpretação dos resultados. Fatores de variação dos teores foliares. Adubação do dendezeiro para as condições da Amazônia Ocidental. Adubação no campo.bitstream/CPAA-2009-09/10247/1/circ_tec11.pd

data from a Portuguese spondyloarthritis cohort

Background: Axial spondyloarthritis (axSpA), particularly ankylosing spondylitis was historically considered a male’s disease and has been under-recognized in women. Emerging evidence reveals sex differences in pathophysiology, disease presentation and therapeutic efficacy. Objective: To identify differences between sexes in a Portuguese cohort of patients with axSpA regarding clinical manifestations, disease activity, functional capacity, patient related outcomes and presence of sacroiliitis on x-ray or magnetic resonance imaging. Methods: Patients with ≥18 years fulfilling the ASAS-Assessment of Spondyloarthritis International Society classification criteria for axSpA registered in the electronic Rheumatic Diseases Portuguese Register (Reuma.pt) were included in this multicentric cross-sectional study. Sociodemographic data, clinical features and imaging were collected from the first record in Reuma.pt. These variables were compared between sexes using Mann-Whitney test and Chi-Square test. Variables with a significant association with variable sex were considered in the multiple variable analysis to adjust the sex effect on the outcome variables. Statistical analysis was performed with R version 4.0.2 and p<0.05 was considered statistically significant. Results: A total of 1995 patients were included, 1114 (55.9%) men and 881 (44.1%) women. Men had an earlier disease onset (25.1 vs 28.4, p<0.001), were younger at diagnosis (26.9 vs 30.4, p<0.001) and were more frequently smokers (32.1% vs 15.7%, p<0.001). Comparing to women, men had worse Bath Ankylosing Spondylitis Metrological Index scores (4.0 vs 3.4, p<0.001), higher levels of C-Reactive Protein (10.5 vs 6.9 mg/L, p<0.001) and were more often Human Leukocyte Antigen-B27 positive (67.8% vs 54%, p<0.001). In contrast, women more frequently had inflammatory bowel disease (8.8% vs 4.9%, p=0.004), higher levels of erythrocyte sedimentation rate (25.0 vs 21.0mm/h, p=0.003) and worse patient-related outcomes-Bath Ankylosing Spondylitis Disease Activity Index (5.7 vs 4.5, p<0.001), Patient Global Assessment (60.0 vs 50.0, p<0.001) and fatigue (6.2 vs 5.0, p<0.001). Discussion: In this large multicentric study from a Portuguese axSpA cohort, we confirmed sex differences in patients with axSpA. This work brings awareness to these differences, resulting in less underdiagnosis and misdiagnosis, optimizing treatment strategies, and improving outcomes in axSpApublishersversionpublishe

Impactos hidroclimáticos de curto prazo no padrão hidrodinâmico de Rio de Estuário Amazônico, Amapá (AP), Brasil.

O objetivo do trabalho foi analisar o padrão da precipitação, da vazão e do nível de marés semidiurnas na Bacia Hidrográfica do Rio Matapi em 2015, quando ocorreu o mais intenso fenômeno El Niño dos últimos 100 anos. Para tanto, foram quantificados os índices pluviométricos da área da bacia, monitorada a vazão em uma seção do manancial com um Accustic Doppler Profiller e acompanhada a variação do nível da coluna d?água com um sensor de pressão durante ciclos completos de marés semidiurnas ocorridos nos meses de abril, junho, setembro, outubro e dezembro/2015. Os dados climáticos foram estatisticamente testados para a série temporal de precipitação 1961-2010, bem como comparados com os da literatura. Os resultados confirmaram 2015 como um ano climatologicamente atípico, promovendo descargas líquidas significativamente reduzidas em relação às séries disponíveis (Friedman: a<0,05). Especificamente, o padrão hidrodinâmico foi representado por curvas de histerese bem correlacionadas (0,76=R2=0,82), que indicam a diferença entre o comportamento dos fluxos de enchente e vazante das marés. Conclui-se que a variação da precipitação resultou da influência do fenômeno El Niño sobre o padrão hidrodinâmico do rio Matapi em 2015 (p<0,05), sendo de relevante interesse científico seu monitoramento para fins de gestão hídrica, principalmente em tempos de aquecimento global