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Experimental Behaviour of the Reverse Channel Joint Component at Elevated and Ambient Temperatures
Fernanda Lopes,Aldina Santiago,Luís Simões da Silva,Tim Heistermann,Milan Veljkovic,José Guilherme da Silva 한국강구조학회 2013 International Journal of Steel Structures Vol.13 No.3
The reverse channel connection appears to have the best combination of desirable features under fire loading: moderate construction cost, ability to develop catenary action and extremely high ductility through deformation of the web channel (Ding and Wang, 2007). This paper presents the results of an experimental investigation of a reverse channel component conducted at the University of Coimbra as part of the European RFCS COMPFIRE Project, the main focus of which is to characterise the behaviour of steel joints that connect steel beams to concrete-filled tubular columns under natural fire loading. A series of tensile and compressive tests at ambient and elevated temperatures was conducted. The purposes of the experimental tests were to characterise the strength, stiffness and ductility of this joint component and to establish a relationship between force,displacement and temperature.
What nutritional factors influence bone mineral density in Crohn’s disease patients?
Fernanda Gomes Coqueiro,Raquel Rocha,Camilla Almeida Menezes,Mirella Brasil Lopes,Vanessa Rosa Oliveira,Flora Maria Lorenzo Fortes,Genoile Oliveira Santana 대한장연구학회 2018 Intestinal Research Vol.16 No.3
Background/Aims: Bone mineral density (BMD) is often low in patients with Crohn’s disease (CD). This study aimed to evaluate the association between nutritional factors and BMD in a group of CD patients. Methods: CD patients 18 years of age or older were included. The body mass index (BMI), waist circumference (WC) and dietary intake were evaluated during two 24-hour recalls. Bone densitometry was performed by dual-energy X-ray absorptiometry of the full body to assess body composition and of the lumbar vertebrae and femoral neck to assess BMD. Results: In the 60 patients evaluated, there was no association between BMD and disease activity or between BMD and disease duration. We observed moderate correlations between BMD in at least one of the evaluated sites and BMI, lean mass, WC, and protein, calcium, phosphorus and magnesium dietary intakes (P<0.05). In the linear regression analysis for spinal BMD, only BMI and calcium dietary intake remained associated (P<0.05). In the linear regression analysis for femoral BMD, WC and phosphorus intake continued to be significant in the final model, although they had low explanatory power for BMD (P<0.05). Conclusions: The prevalence of low BMD was high in CD patients. BMI, WC, calcium and phosphorus dietary intake were positively correlated with BMD.
Santos Ingrid Garcia,Ramos de Faria Fernanda,da Silva Campos Marcio José,de Barros Beatriz Álvares Cabral,Rabelo Gustavo Davi,Devito Karina Lopes 대한영상치의학회 2023 Imaging Science in Dentistry Vol.53 No.2
Purpose: The objective of this study was to assess the fractal dimension, lacunarity, trabecular microarchitecture parameters, and cortical linear measurements in the mandibles of male and female individuals to identify differences between them. Materials and Methods: In total, 116 cone-beam computed tomography scans of healthy individuals of different ages (57 men and 59 women, aged between 20 and 60 years) were selected. The following bone parameters were measured: 1) buccal, lingual, and basal cortical bone thickness in 5 standard parasagittal sections (the midline, the left and right sides of the lower lateral incisors, and the left and right sides of the lower canines); 2) the bone volume fraction of 10 sequential axial sections from each patient by creating a volume of interest in the area between the lower canines; and 3) fractal dimension and lacunarity using grayscale images of the same region of the volume of interest in the anterior mandible. Spearman correlation coefficients and the Mann-Whitney test were used. Results: A significant and positive correlation was found between age and cortical thickness, especially in the region of the central incisors. Significant differences between sexes in terms of fractal dimension, lacunarity, and bone volume were found. Women revealed lower fractal dimension values and higher lacunarity and bone volume ratio values than men. Conclusion: Fractal dimension, lacunarity, trabecular bone volume, and cortical thickness were different between men and women of different ages.
Effect of Acupuncture at Tender Points for the Management of Fibromyalgia Syndrome: A Case Series
Jessica Lucia Neves Bastos,Josie Resende Torres Silva,Marcelo Lourenco Silva,Fernanda Lopes Buiatti de Araujo,Elisa Do´ria Pires 사단법인약침학회 2013 Journal of Acupuncture & Meridian Studies Vol.6 No.3
Background: Affecting more women than men, fibromyalgia syndrome (FMS) is a rheumatic disorder characterized by chronic, diffuse and widespread musculoskeletal pain, and its pathogenesis is still unknown. Among the recommended treatments, acupuncture (for its analgesic effects) is an effective option for reducing the pain sensitivity and improving quality of life. Therefore, this study aimed to investigate whether acupuncture at tender points could effectively manage FMS. Methods: Eight female patients, with a previous diagnosis of fibromyalgia, underwent an initial assessment involving pressure algometer measurements for pain tolerance and questionnaires [Fibromyalgia Impact Questionnaire (FIQ), Heath Assessment Questionnaire (HAQ), Beck Depression Inventory (BDI), and Beck Anxiety Inventory (BAI)], followed by treatment. Over a 2-month period, acupuncture was performed once per week at five tender points, located bilaterally at the occipital bone, trapezius, rhomboid, upper chest and lateral epicondyle. At the end of treatment, the participants underwent a reassessment for a final review of the applied methods. Results: We observed a reduction in the pain threshold and sensitivity and improvement in the areas of anxiety and depression and quality of life, which were demonstrated using the FIQ, BDI and BAI but not the HAQ.
Heliene Leite Ribeiro Porto,Antonio Carlos Leal de Castro,James Werllen de Jesus Azevedo,Leonardo Silva Soares,Cássia Fernanda Chagas Ferreira,Marcelo Henrique Lopes Silva,Helen Roberta Silva Ferreira 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.7
Concentrations of calcium, iron, potassium, magnesium, phosphorus, zinc, copper, selenium and nickel were determined in the muscle tissue of seven species of fish (Plagioscion squamosissimus, Geophagus surinamensis, Prochilodus lacustres, Curimata sp., Schizodon dissimilis, Ageneiosus ucayalensis and Hypostomus plecostomus) collected from the lower course of the Itapecuru River in the state of Maranhão, Brazil. The samples were digested in a nitricperchloric solution and analyzed using an inductively coupled plasma atomic emission spectrometer, with the construction of specific calibration curves for each element. The highest concentrations of constituent minerals were found for phosphorus, potassium, nickel and magnesium (399.83, 144.60, 90.20 and 29.49mg 100 g−1, respectively) in G. surinamensi, P. lacustres and Curimata sp. The lowest concentrations were found for copper, zinc, iron and selenium (0.12, 0.51, 1.05 and 8.31mg 100 g−1, respectively) in Curimata sp., S. dissimilis, A. ucayalensis and P. squamosissimus. The concentrations of all minerals can be considered low and are below the maximum limit established by Brazilian legislation for the human ingestion of fish meat. A comparison of the seven species of fish investigated revealed no statistically significant differences regarding the concentrations of minerals, suggesting that size and different dietary habits do not exert an influence on absorption. The low concentrations of metals, such as Fe, Cu, Zn and Ni, may be related to the environmental conditions of the mouth of the river, which receives ocean inputs that produce particular tide cycles with a strong dispersion capacity, thereby diminishing residence time in the water column and reducing the availability of these metals to species of fish.
Agroforest System Implantation for Gully Erosion Control in Pindorama Reserve, Brazil
Maria Teresa Vilela Nogueira A,Sidney Rosa Vieira,Antonio Lucio Mello Martins,Everton Luis Finoto,Eliane Gomes Fabri,Teresa Cristina Tarle Pissarra,Fernanda Fernandes Salazar,Mariana Barbara Lopes Bon 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6