A full-scale innovative GFRP-concrete hybrid footbridge : description and testing

The present paper describes the construction process of a full-scale innovative GFRP-concrete hybrid footbridge, and summarizes the main tests performed. This footbridge is 11 m long, 2 m wide, simply supported, and composed of two pultruded I-shaped GFRP girders (0.2 m x 0.4 m) and a 0.04 thick deck in steel fiber reinforced self-compacting concrete (SFRSCC). To evaluate the static and dynamic behavior of this footbridge, short and long-term load tests, and dynamic tests were performed.(undefined

Static, dynamic and creep behaviour of a full-scale GFRP-SFRSCC hybrid footbridge

A three-year research project (Pontalumis) was carried out for the development of an innovative simply supported hybrid footbridge, with 11 m of length and 2 m of width. The footbridge is composed of two pultruded I-shaped glass fibre reinforced polymer (GFRP) girders (400×200(×15) mm2) bonded and bolted to a 37.5 mm thick deck in steel fibre reinforced self-compacting concrete (SFRSCC). The present paper describes the material/structural concept of this footbridge, its design and construction process, and summarizes the response of the prototype when submitted to static short and long-term load tests, and dynamic load tests. The prototype was simple and fast to execute, presenting a reduced dead-weight of only about 3 tonf. The static and dynamic behaviour of the prototype as well as its long-term deflection fulfil standards’ requirements for footbridge structures and are in good agreement with conventional analytical and numerical design tools.AD

Pontalumis : ponte pedonal mista GFRP-betão : descrição da solução, ensaios e modelação

Este artigo descreve o desenvolvimento de um protótipo de ponte pedonal à escala real utilizando um sistema estrutural misto inovador com longarinas em perfis pultrudidos de polímero reforçado com fibra de vidro (GFRP) e tabuleiro em betão auto-compactável reforçado com fibras de aço (SFRSCC), no âmbito do projeto PONTALUMIS. O protótipo apresenta um comprimento total de 11.0 m e uma secção transversal composta por dois perfis de GFRP em I e uma laje fina (38 mm) em SFRSCC. Neste trabalho são apresentados os resultados dos ensaios (i) estáticos, (ii) de fluência e (iii) dinâmicos, bem como as simulações numérica e analítica. Os resultados obtidos revelaram uma boa resposta da estrutura, em concordância com os modelos de previsão, confirmando o elevado potencial do sistema estrutural proposto

Laser-Induced Periodic Surface Structures on Conjugated Polymers: Poly(3-hexylthiophene)

8 pags.; 11 figs.© 2015 American Chemical Society. In this work, we report on the surface patterning of semiconducting poly(3-hexylthiophene) (P3HT) thin films by means of laser-induced periodic surface structures (LIPSS). Two different laser wavelengths, 266 and 532 nm, and a broad range of fluences and number of pulses have been used in order to optimize the LIPSS morphology. Ripples period and depth can be tuned by laser parameters. In particular, the high optical absorption of P3HT at 532 nm enables the formation of well-ordered nanostructures with periodicities around 460 nm. Near edge X-ray absorption fine structure (NEXAFS) and Raman spectroscopy reveal a good chemical stability of P3HT thin films during LIPSS formation. Conducting atomic force microscopy (C-AFM) performed on the LIPSS reveals a higher electrical conduction in the trenches than in the ridge regions. Resonance Raman spectroscopy and grazing incidence wide-angle X-ray scattering (GIWAXS) indicate a loss of crystallinity of P3HT thin films during LIPSS formation, suggesting melting of the outer polymer surface. This effect produces ridges with molecular order lower than that of the original thin film. As a consequence of this transformation, the electrical conduction in the ridges becomes lower than that in the trenches.The authors gratefully acknowledge the financial support of the Spanish Ministry of Economy and Competitiveness (MINECO) through Projects MAT 2011-23455, MAT 2012-33517 and CTQ 2013-43086-P. A.R.-R. and E.R. are indebted to MINECO for a FPI (BES-2013-062620) and Ramon y Cajal (RYC-2011-08069) contracts, respectively. We thank the Swiss Light Source for beamtime at PolLux, where the NEXAFS experiments were performed. We also thank the ESRF for beamtime at BM26 where in situ GISAXS and GIWAXS experiments were carried out. We thank B. Watts for assistance in using beamline PolLux and G. Portale and W. Bras for beamline support at BM26. P. Müller-Buschbaum and S. Guo are thanked for seminal comments at the beginning of this workPeer Reviewe

Características clínicas e histopatológicas asociadas a pacientes con Cáncer de Mama Triple Negativo en un Hospital de Referencia peruano, 2012- 2018: Clinical and histopathological characteristics associated with patients with triple-negative Breast cancer at a national reference hospital, 2012 - 2018

Objective: To determine the clinical and histopathological characteristics associated to patients with triple negative breast cancer of the Hipolito Unanue National Hospital between June 2012 to June 2018. Methods: Cross-sectional analytical study. Results: 134 patients were included, out of which 36 (26.9%) were TN and 98 No TN. Of the histopathological characteristics, the most frequent CD was III and II for the two groups. The histological type that predominated was the infiltrating ductal type in both groups. The high histological grade was characteristic in NT (58%) unlike non TN. The NTs were larger 5.75 cm in contrast to the TNs with 3 cm, and the Ki 67 was higher in the TN 35% in contrast to the NON TN with 15%. In the bivariate analysis the size (RP: 1.4, CI: 1.17-1.68, p = 0.0001), Ki 67 (RP: 1.05, CI: 1.03-1.07, p = 0.001), BMI ≥25 kg/m2 ( RP: 1.14, CI: 1.23-6.22, p = 0.014), Histological Grade 3 (RP: 3.87, CI: 1.74-8.63, p = 0.001), size ≥5 cm (RP: 2.94, CI: 1.33-6.48, p = 0.008) were significant. In the multivariate analysis it was found that grade 3 (PR: 1.74, CI: 1.01-3, p = 0.0046) and Ki 67 (RP: 1.02, CI: 1.01-1.03, p = 0.0001) were histopathological characteristics associated with CMTN. Conclusion: There are histopathological characteristics associated with triple negative breast cancer particularly high histological grade and Ki67 value.Objetivo:Determinar las características clínicas e histopatológicas asociadas a las pacientes con cáncer de mama triple negativo (CMTN) en un Hospital peruano de referencia. Métodos: Estudio transversal, analítico. Se revisaron las historias clínicas de todas las pacientes atendidas en el Hospital Nacional Hipóito Unanue durante el periodo de junio del 2012 a junio del 2018. Resultados: Se incluyeron 134 pacientes de los cuales 36 (26.9%) correspondieron a CMTN. el estadío clínico más frecuente fue el III y II para los dos grupos. El tipo histológico que más predomino fue el tipo ductal infiltrante en ambos grupos. El grado histológico elevado fue característico en los casos de CMTN (58%) a diferencia de los No TN. Los CMTN fueron de mayor tamaño (5.75 cm vs 3cm en no TN), y el Ki 67 fue más elevado en el TN (35% en comparación con el No TN con 15%). Se determinó en el análisis bivariado que el tamaño (RP: 1.4, IC: 1.17-1.68, p= 0.0001), Ki 67 (RP: 1.05, IC: 1.03-1.07, p= 0.001), IMC ≥25 kg/m2 (RP: 1.14, IC: 1.23-6.22, p= 0.014) y el Grado Histológico 3 (RP:3.87, IC: 1.74-8.63, p= 0.001) se asociaron significativamente a la presencia de CMTN. En el análisis multivariado se encontró que el grado 3 (RP: 1.74, IC: 1.01-3. p= 0.0046) y el Ki 67 (RP: 1.02, IC: 1.01-1.03, p= 0.0001) fueron las características histopatológicas asociados al CMTN. Conclusión: Las características más consistentemente asociadas al cáncer de mama triple negativo en fueron el elevado grado histológico y mayor valor de Ki67

Detection of Bartonella bovis DNA in blood samples from a veterinarian in Mexico

The genus Bartonella encompasses 38 validated species of Gram-negative, facultative intracellular bacteria that colonize the endothelial cells and erythrocytes of a wide spectrum of mammals. To date, 12 Bartonella species have been recorded infecting humans, causing diseases of long historical characterization, such as cat scratch fever and trench fever, and emerging bartonellosis that mainly affect animal health professionals. For this reason, this study aimed to report a documented case of Bartonella bovis infecting a veterinarian from Mexico by the amplification, sequencing and phylogenetic reconstruction of the citrate synthase (gltA) and the RNA polymerase beta-subunit (rpoB) genes, and to report the natural course of this infection. To our knowledge, this work is the first to report the transmission of B. bovis via needlestick transmission to animal health workers in Latin America

Analysis of the Yield of Radish (Raphanus Sativus L.) Fertilized with Compost Based on Organic Waste from Markets and its Relationship with its Stomatal Density

For higher yields in vegetable cultivation, the availability of soil nutrients must be improved. Therefore, the aim of this research was to establish the relationship between stomatal density and the yield of the radish crop fertilized with compost made from organic market waste. A completely randomized block design was used, which consisted of 3 blocks and 5 treatments, which were T1, T2, T3, T4 and T5 with 00, 10, 15, 15, 20 and 25 g compost/plant respectively. The physical characteristics of the plants were evaluated from sowing to harvest and the data obtained were processed by analysis of variance and Duncan's test. Chemical analysis of the compost and soil was carried out, as well as a foliar analysis to determine the nutrient concentration by treatment. The results determined that the treatment (T4) stood out in plant length with 28.96 cm, plant weight with 43.33 g, yield of 10.82 t/ha and bulb diameter of 3.92 cm; likewise, in the concentration of nutrients in the leaves, the treatment (T5) highlighted in N with 5.94%, Ca 4.84%, Mg 1.29%, Zn 64.58 ppm and a stomatal density of 642 stomas/mm2. It is concluded that, at an adequate dose of compost, the concentration of nutrients increases, as well as the stomatal density, resulting in higher yields

Stomatal Density and its Relationship with Yield of Radish (Raphanus Sativus L.) Fertilized with Biol Produced from Sugar Cane Residues

The impact of agro-industrial waste can be reduced by using it in crop fertilization. The aim of this study was to evaluate the stomatal density and yield of radish (Raphanus Sativus L.) fertilized with biol at different concentrations, produced from sugar cane residues. A completely randomized blocks design statistical model was used, which consisted of 5 tests with 3 repetitions for each one, being T1 the control trial, and T2, T3, T4 and T5 the treatments using 2, 3, 4 and 5 L of biol in 200 L of water respectively. In terms of crop physical characteristics, the T5 treatment excelled in plant length, equatorial diameter, plant weight, as well as yield with 12.71 t/ha. Likewise, in the chemical analysis of the radish leaves, the T5 treatment showed an increase in K, Ca, Zn and MN, while the T2 did it in N, P and Cu, the T3 in Fe and the T4 in Mg. In terms of stomatal density, T5 stood out with 122 stomatal/mm2. Based on this, it is concluded that the increase in the dose of biol influences the increase in nutrient and stomatal density and hence the yield of the radish crop