O registro civil como fonte histórica: contribuições e desafios dos registros civis nos estudos do pós-abolição, Rio de Janeiro (1889-1940)

Este artigo tem como principal objetivo demonstrar as contribuições possíveis dos registros civis de nascimento e óbito para os estudos históricos. Para tanto, explanarei as dificuldades de sua implementação no Brasil, desde o Império até a sua efetivação durante a Primeira República, assim como demonstrar as possibilidades de análise dessas fontes. Desse modo, como estudo de caso, utilizarei o período pós-abolição para avaliar os limites e as contribuições do uso desses dados

Flexural response of HSC girders strengthened with non- and prestressed CFRP laminates

An experimental programme was carried out to characterise the flexural response of prestressed highstrength concrete (HSC) girders strengthened with CFRP laminates. For that purpose, four beams with 20 m span were subjected to four-point bending loads and the effectiveness of two distinct strengthening strategies was analysed. The following testing situations have been considered: one girder was externally strengthened with CFRP laminates, whereas one was externally strengthened with prestressed CFRP laminates; the two remaining girders were left unstrengthened and were used as control. The monitoring system included the measurement of deflections at critical sections, strains in pre-selected points of the concrete girder and CFRP laminates and the applied loading, respectively using displacement transducers, strain gages and load cells. Herein, the tests are thoroughly described and the most relevant results and conclusions are presented

Comportamento à rotura de vigas de betão de alta resistência reforçadas com CFRP

O presente artigo encontra-se inserido num projeto que visa caracterizar o comportamento de vigas de Betão de Alta Resistência (HSC) reforçadas com laminados de CFRP (Carbon Fiber Reinforced Polymer). Para o efeito, foi definido um programa experimental que compreende o reforço de uma viga fabricada em HSC e o seu ensaio em flexão até à rotura. A realização de um estudo numérico prévio permitiu concluir que a aplicação de pré-esforço aos laminados de CFRP aumentaria de forma considerável a eficiência do reforço. Sendo assim a viga pré-esforçada de grande vão (20 m), fabricada com um betão de resistência à compressão de 120 MPa e de secção transversal em I (com altura de 0.5 m e largura de 0.30 m) foi reforçada com laminados de CFRP pré-esforçados. A operação de reforço das vigas foi precedida do carregamento das mesmas com uma carga correspondente a uma combinação quase permanente de ações, mantida constante durante a operação de reforço, de forma a simular o reforço de elementos estruturais em aplicações correntes de engenharia civil. Após reforço, a viga foi ensaiada até à rotura por flexão. Os resultados deste estudo foram comparados com os obtidos em ensaios à rotura de duas vigas de HSC não reforçadas com as mesmas dimensões e condições de ensaio, apresentando-se as principais conclusões

Chitosan nanoparticles as bioactive vehicles for textile dyeing: a proof of concept

In recent years bioactive textiles have risen to the forefront of consumers perception due to their potential protection against virus, fungi and bacteria. However, traditional textile staining is an eco-damaging process that and current methods of textile functionalization are expensive, complicated and with great environmental impact. With that in mind, this work sought to show a possible solution for this problematic through the usage of a novel one step textile dyeing and functionalization method based upon nanoencapsulated textile dyes (NTDs). To do so navy blue everzol NTDs were produced with chitosan, cotton dyed, characterized through FTIR and SEM and biological potential evaluated through biocompatibility screening and antimicrobial activity against skin pathogens. The data obtained showed that NTDs effectively dyed the target textile through a coating of the cotton fibre and that NTDs formed hydrogen bonds with the cellulose fibre via electrostatic interactions of the chitosan amino groups with cotton sulphate groups. From a biocompatibility perspective NTDs dyed cotton had no deleterious effects upon a skin cell line, as it promoted cellular metabolism of HaCat cells, while traditionally died cotton reduced it by 10%. Last but not least, NTDs dyed cotton showed significant antimicrobial activity as it reduced viable counts of MRSA, MSSA and A. baumannii between 1 and 2 log of CFU while traditional dyed cotton had no antimicrobial activity. Considering these results the novel method proposed shows is a viable and ecological alternative for the development of antimicrobial textiles with potential biomedical applications.info:eu-repo/semantics/publishedVersio

A Self-powered And Autonomous Fringing Field Capacitive Sensor Integrated Into A Micro Sprinkler Spinner To Measure Soil Water Content

We present here the design and fabrication of a self- powered and autonomous fringing field capacitive sensor to measure soil water content. The sensor is manufactured using a conventional printed circuit board and includes a porous ceramic. To read the sensor, we use a circuit that includes a 10 kHz triangle wave generator, an AC amplifier, a precision rectifier and a microcontroller. In terms of performance, the sensor's capacitance ( measured in a laboratory prototype) increases up to 5% when the volumetric water content of the porous ceramic changed from 3% to 36%, resulting in a sensitivity of S = 15.5 pF per unity change. Repeatability tests for capacitance measurement showed that the theta(v) sensor's root mean square error is 0.13%. The average current consumption of the system ( sensor and signal conditioning circuit) is less than 1.5 mu A, which demonstrates its suitability for being powered by energy harvesting systems. We developed a complete irrigation control system that integrates the sensor, an energy harvesting module composed of a microgenerator installed on the top of a micro sprinkler spinner, and a DC/ DC converter circuit that charges a 1 F supercapacitor. The energy harvesting module operates only when the micro sprinkler spinner is irrigating the soil, and the supercapacitor is fully charged to 5 V in about 3 h during the first irrigation. After the first irrigation, with the supercap fully charged, the system can operate powered only by the supercapacitor for approximately 23 days, without any energy being harvested.17

Why not "do simple things in a simple way": Use of the Pap test as the first step in screening genetic stability for human cultured stem cell therapy?

The aim of this study was to analyze adipose tissue-derived mesenchymal stem cells (AT-MSCs) using the Pap test as a first screening step to evaluate genetic stability. Human adipose tissue from six healthy female donors was obtained from elective liposuction procedures. The cells were isolated, cultivated at P2/P3, characterized by flow cytometric analysis, and differentiation induced. The AT-MSCs were stained by Papanicolaou staining and analyzed according to the Bethesda classification, and viability-apoptosis relationships were evaluated. The results of the Pap test for Sample I indicated high-grade alterations consistent with genetic instability; for Samples II-V, atypical cells of undetermined significance; and for Sample VI, normal cells. These results demonstrate the potential of using the Pap test as an initial screening step to evaluate the genetic stability of cultured AT-MSCs and also suggest its use for other adherent cells such as embryonic stem cells or induced pluripotent stem cells

Study of viability of high pressure extract from pomegranate peel to improve carrot juice characteristics

Extracts from fruit processing by-products usually present high amounts of bioactive compounds with several important activities such as antioxidant and antimicrobial capacities. In this work we studied (i) the cytotoxicity profile of pomegranate peel extract and (ii) safety and quality aspects after incorporating this extract in carrot juice – a beverage with low antioxidant potential and highly prone to microbial growth. The extract was obtained by high-pressure extraction and was non-cytotoxic towards the Caco-2 cell line after in vitro digestion. The non-cytotoxic pomegranate peel extract was added to carrot juice in a concentration of 5 mg mL−1. Fortified juices were processed by high-pressure and conventional heat and stored under refrigeration. On the 28th day of storage, microbial counts in PPE-fortified juices were reduced by 1.0 log10 CFU mL−1 and the pressurized juices showed significantly fewer counts than the thermal-treated ones. Just after processing, phenolic and flavonoid contents, as well as ABTS and FRAP antioxidant capacities, increased 3.6, 3.5, 8.2, and 9.4-fold, respectively in the fortified juices. The extract addition did not affect any colour parameter and all studied physicochemical parameters i.e. total soluble solids, pH, colour, total phenolics, flavonoids, hydrolysable tannins, and antioxidant capacity remained constant throughout storage. These findings could pave the way towards the development of safe beverages with improved bioactive properties.N/

Impact of addition of pomegranate peel extract and high-pressure on carrot juice preservation: quality, safety and sensorial aspects

info:eu-repo/semantics/publishedVersio

Successful pain relief in chronic low back pain patients undergoing multimodal physiotherapy are associated with an early response to treatment

Trabalho apresentado no 10th Congress of European Pain Federation (EFIC), 6-9 setembro 2017, Copenhaga, DinamarcaN/