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O controle de qualidade da água é uma das ações fundamentais para a prevenção de doenças. Uma das causas mais frequentes de morte no mundo são as doenças transmitidas pela água, onde as bactérias contaminantes mais encontradas são Acinetobacter spp, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa e Staphylococcus aureus. A falta da potabilidade da água nem sempre é perceptível à visão ou olfato, sendo necessária uma análise laboratorial para detectá-la. Como a qualidade da água é um fator imprescindível à manutenção da saúde humana, em ambientes de saúde, faz-se necessária a confirmação da qualidade da água oferecida aos pacientes. Assim, foi selecionado o ponto de coleta de amostras de água em uma Unidade de Saúde localizados no município de Itajubá, Minas Gerais. Foi realizada a análise de presença de coliformes totais e de Escherichia coli por utilizando o reagente Colilert®, que é aprovado pelo método padrão para análise de água e esgoto Standard Methods for the Examination of Water and Wastewater. Os resultados foram avaliados por alteração de cor indicativa de presença ou ausência de coliformes totais e E. coli. Na Unidade de Saúde, todas as amostras, foram negativas para coliformes totais e presença de E.coli, indicando que as amostras são próprias para consumo. O objetivo desse trabalho foi verificar a qualidade microbiológica da água que é fornecida a uma Unidade de Saúde e alertar para a importância do monitoramento da qualidade visando a prevenção e disseminação de doenças que podem agravar ainda mais o quadro de pacientes já debilitados.
Ana Carolina França; Guilherme Passos de Abreu; Laiz Furlan Balioni; Patrícia Capellato; Maria Gabriela Araújo Ranieri; Ana Lúcia Fonseca; Gilza Carla Ribeiro; Paulo Sergio Marques; Daniela Sachs. Análise microbiológica da água fornecida a uma Unidade de Saúde no Município de Itajubá, Minas Gerais. Research, Society and Development 2021, 10, 1 .
AMA StyleAna Carolina França, Guilherme Passos de Abreu, Laiz Furlan Balioni, Patrícia Capellato, Maria Gabriela Araújo Ranieri, Ana Lúcia Fonseca, Gilza Carla Ribeiro, Paulo Sergio Marques, Daniela Sachs. Análise microbiológica da água fornecida a uma Unidade de Saúde no Município de Itajubá, Minas Gerais. Research, Society and Development. 2021; 10 (6):1.
Chicago/Turabian StyleAna Carolina França; Guilherme Passos de Abreu; Laiz Furlan Balioni; Patrícia Capellato; Maria Gabriela Araújo Ranieri; Ana Lúcia Fonseca; Gilza Carla Ribeiro; Paulo Sergio Marques; Daniela Sachs. 2021. "Análise microbiológica da água fornecida a uma Unidade de Saúde no Município de Itajubá, Minas Gerais." Research, Society and Development 10, no. 6: 1.
This study was done in order to evaluate the changes in flexural strength and surface roughness in dental material restorations after immersion in coffee. Bars specimens (2mm x 2mm x 25 mm) of Z100 3M/ESPE were made according to ISO 4049 using aluminum molds. After curing, the specimens were then randomly divided into five groups and conditioned at 37°C in physiological serum. In all groups, except control, samples were immersed in coffee for ten minutes daily. In group A, the samples were immersed in coffee. For group B, after to be immersed in coffee, samples were immersed in distilled water for one minute. For group C, samples were immersed in mouthwash for one minute. For group D, samples were brushing for ten minutes, with load of 250g and 4250 cycles after all treatments the samples were stored in physiological serum again. In control group, samples were only stored in physiological serum. The five groups were then divided into 2 subgroups according storage time, six and nine weeks, respectively. Flexural strength was determined using three point bending test in a universal testing machine. All the tests were carried out at a room temperature and samples were maintained in physiological serum during the test. Surface roughness measurements were made using a surface roughness tester. All data were analyzed using one-way analysis of variance (ANOVA) followed by Dunnet tests. The ANOVA indicated no difference in the means of surface roughness and significant was observed for flexural strength between control group and one group (coffee).
Patrícia Capellato; Ana Paula Rosifini Alves Claro. Evaluation of the flexural strength and surface roughness of dental material after immersion in coffee. Research, Society and Development 2021, 10, 1 .
AMA StylePatrícia Capellato, Ana Paula Rosifini Alves Claro. Evaluation of the flexural strength and surface roughness of dental material after immersion in coffee. Research, Society and Development. 2021; 10 (3):1.
Chicago/Turabian StylePatrícia Capellato; Ana Paula Rosifini Alves Claro. 2021. "Evaluation of the flexural strength and surface roughness of dental material after immersion in coffee." Research, Society and Development 10, no. 3: 1.
In the last five years, Brazil faces a housing deficit of around 6 million domiciles, while the contradictory 7 million unoccupied buildings. So far, neither the government nor the civil construction sector could resolve the issue, which is part of a graver picture with the environmental issues. Researches have been looking for a solution and the hyperadobe system, as a bagged earth construction system, presents many advantages for social interest constructions. Thus, the focus of this study is the fragilities and potentialities of hyperadobe's application in the national scenario, meaning to show it as a possible vector to solve the problem. Through the bibliographic review, it is concluded that the studied technology presents particularly advantageous characteristics to face the problem such as the low costs, the fast execution, the easy workforce training, and the high environmental performance in thermal and acoustical comfort. Therefore, is defended that the introduction of hyperadobe on the public policies on facing the housing deficit would be of great value, working on the difficulties that the system faces nowadays.
Renata Do Carmo Mota Alves; Maria Gabriela Araújo Ranieri; Patrícia Capellato; Daniele Ornaghi Sant'anna. Low environmental impact construction: fragilities and potentialities of hyperadobe as a solution for the Brazilian housing deficit. REVES - Revista Relações Sociais 2020, 4, 14001 -14015.
AMA StyleRenata Do Carmo Mota Alves, Maria Gabriela Araújo Ranieri, Patrícia Capellato, Daniele Ornaghi Sant'anna. Low environmental impact construction: fragilities and potentialities of hyperadobe as a solution for the Brazilian housing deficit. REVES - Revista Relações Sociais. 2020; 4 (1):14001-14015.
Chicago/Turabian StyleRenata Do Carmo Mota Alves; Maria Gabriela Araújo Ranieri; Patrícia Capellato; Daniele Ornaghi Sant'anna. 2020. "Low environmental impact construction: fragilities and potentialities of hyperadobe as a solution for the Brazilian housing deficit." REVES - Revista Relações Sociais 4, no. 1: 14001-14015.
O mercado global de implantes dentários estima o valor de US $ 13,01 bilhões até 2023 contra US $ 9,50 bilhões em 2018. O estudo dos materiais para a fabricação dos implantes tem aumentado com o objetivo de estender a vida útil do material evitando sua substituição. Assim, neste estudo investigamos o comportamento eletroquímico de corrosão, molhabilidade e atividade antimicrobiana do titânio e da liga binária Ti-30Ta. O titânio foi cortado em discos de 10 mm de diâmetro. A liga Ti-30Ta foi obtida a partir de titânio e tântalo em forno a arco voltaico, homogeneizada em vácuo a 1000ºC por 24 horas, trabalhada a frio e solubilizada a 950 ºC por 2 horas seguido de resfriamento em água . Em seguida, as barras foram cortadas em discos. Os testes de resistência à corrosão avaliaram o comportamento eletroquímico, a molhabilidade das superfícies do substrato foi investigada usando o método da gota séssil e a formação de biofilme foi investigada por de S epidermidis. Este estudo tem como objetivo investigar a resistência à corrosão do Ti cp e da liga Ti-30Ta em solução eletrolítica NaCl 0,15M + NaF 0,03M e formação de biofilme testado. Pelos resultados obtidos concluímos que o comportamento eletroquímico de ambas as superfícies apresenta boa resistência à corrosão e comportamento hidrofílico (< 90 °). No entanto, a liga Ti-30Ta diminui a adesão da bactéria S epidermidis.
Patrícia Capellato; Mariana Da Silva Novakoski; Lucas Victor Benjamim Vasconcelos; Tainara Aparecida Nunes Ribeiro; Mirian De Lourdes Noronha Motta Melo; Gilbert Silva; Roberto Zenhei Nakazato; Maria Gabriela Araújo Ranieri; Ana Paula Rosifini Alves Claro; Daniela Sachs. Atividade antimicrobiana e corrosão do titânio e da liga Ti-30Ta. Research, Society and Development 2020, 9, 1 .
AMA StylePatrícia Capellato, Mariana Da Silva Novakoski, Lucas Victor Benjamim Vasconcelos, Tainara Aparecida Nunes Ribeiro, Mirian De Lourdes Noronha Motta Melo, Gilbert Silva, Roberto Zenhei Nakazato, Maria Gabriela Araújo Ranieri, Ana Paula Rosifini Alves Claro, Daniela Sachs. Atividade antimicrobiana e corrosão do titânio e da liga Ti-30Ta. Research, Society and Development. 2020; 9 (11):1.
Chicago/Turabian StylePatrícia Capellato; Mariana Da Silva Novakoski; Lucas Victor Benjamim Vasconcelos; Tainara Aparecida Nunes Ribeiro; Mirian De Lourdes Noronha Motta Melo; Gilbert Silva; Roberto Zenhei Nakazato; Maria Gabriela Araújo Ranieri; Ana Paula Rosifini Alves Claro; Daniela Sachs. 2020. "Atividade antimicrobiana e corrosão do titânio e da liga Ti-30Ta." Research, Society and Development 9, no. 11: 1.
New biomaterials for biomedical applications have been developed over the past few years. This work summarizes the current cell lines investigations regarding nanosurface modifications to improve biocompatibility and osseointegration. Material surfaces presenting biomimetic morphology that provides nanoscale architectures have been shown to alter cell/biomaterial interactions. Topographical and biofunctional surface modifications present a positive effect between material and host response. Nanoscale surfaces on titanium have the potential to provide a successful interface for implantable biomedical devices. Future studies need to directly evaluate how the titanium nanoscale materials will perform in in vivo experiments. Biocompatibility should be determined to identify titanium nanoscale as an excellent option for implant procedures.
Patricia Capellato; Samira Esteves Afonso Camargo; Daniela Sachs. Biological Response to Nanosurface Modification on Metallic Biomaterials. Current Osteoporosis Reports 2020, 18, 790 -795.
AMA StylePatricia Capellato, Samira Esteves Afonso Camargo, Daniela Sachs. Biological Response to Nanosurface Modification on Metallic Biomaterials. Current Osteoporosis Reports. 2020; 18 (6):790-795.
Chicago/Turabian StylePatricia Capellato; Samira Esteves Afonso Camargo; Daniela Sachs. 2020. "Biological Response to Nanosurface Modification on Metallic Biomaterials." Current Osteoporosis Reports 18, no. 6: 790-795.
The inadequate disposal of household appliances by consumers and industries have annually been generating enormous amounts of polymeric waste (PW). So, the interest in reuse of PW in civil construction has increased. The production of new cementitious materials, such as concrete with PW, proves to be a promising solution to inappropriate disposal of this waste. In this study, self-compacting concrete (SCC) was developed with partial replacement of the coarse aggregates by polymeric waste (PW) from the recycling of refrigerators. In the SCC reference mixture, Portland cement, silica fume, sand, gravel and superplasticizer were used. The study also grouped the gravel as replaced by 5%, 10%, 15% and 20% of PW. In order to analyze the samples, the following tests were used: spreading, viscosity, passing ability, compressive strength, tensile strength, microstructure, modulus of elasticity, specific gravity, absorption, voids index and electrical resistivity. The SCC found showed adequate homogeneity and viscosity, staying within the normative parameters. The mechanical resistance was above 20 MPa; specific mass between 1870 to 2260 kg/m3; modulus of elasticity ranged from 34 to 14 GPa; and electrical resistivity between 319 to 420 ohm.m. Due to the mechanical resistance, the SCC with PW can be used for structural purposes and densely reinforced structures such as pillars, beams and foundation elements.
Lucas Silva; Josimara Silva; Matheus Francisco; Vander Ribeiro; Michel Souza; Patricia Capellato; Marcelo Souza; Valquíria Santos; Paulo Gonçalves; Mirian Melo. Polymeric Waste from Recycling Refrigerators as an Aggregate for Self-Compacting Concrete. Sustainability 2020, 12, 8731 .
AMA StyleLucas Silva, Josimara Silva, Matheus Francisco, Vander Ribeiro, Michel Souza, Patricia Capellato, Marcelo Souza, Valquíria Santos, Paulo Gonçalves, Mirian Melo. Polymeric Waste from Recycling Refrigerators as an Aggregate for Self-Compacting Concrete. Sustainability. 2020; 12 (20):8731.
Chicago/Turabian StyleLucas Silva; Josimara Silva; Matheus Francisco; Vander Ribeiro; Michel Souza; Patricia Capellato; Marcelo Souza; Valquíria Santos; Paulo Gonçalves; Mirian Melo. 2020. "Polymeric Waste from Recycling Refrigerators as an Aggregate for Self-Compacting Concrete." Sustainability 12, no. 20: 8731.
With little success, researchers has been searching for alloys with elements such as tantalum to improve the long-term life of implants. The Ti–30Ta alloy presents an elastic modulus E = 69 GPa that is close to that of bone (E = 17–25 GPa) than Ti cp (E = 105 GPa). In addition, nanostructure surface modification influences cell behavior and antimicrobial activity. So, this study investigates the corrosion behavior of surface modification by TiO2 nanotube grown on Ti–30Ta alloy after anodization process in the electrolyte glycerol + NH4F 0.25% at 30 V, for nine hours without annealing and annealed in 450 °C, 530 °C and 600 °C (5 °C/min). The electrochemical behavior was evaluated by three electrodes cell. The counter-electrode of graphite, reference-electrode of saturated calomel electrode and working-electrode at electrolyte of 0.15 M NaCl + 0.03 M NaF, with pH = 6 for 8000 s. The scanned region ranged from −0.8 V to values up to 3.5 V with a sweep rate 0.166 mV/s. Potentiodynamic polarization curves were obtained with a potentiostat. The sample was characterized by scanning electron microscopy (SEM) imaging, X-ray diffraction analysis (XRD) and wettability with a contact angle goniometer. We concludes from the obtained results that all treatment surfaces are hydrophilic (2 nanotube crystallinity showed anatase phase after annealing at 450 °C, 530 °C and 600 °C; the exceptions were the anodized-without-annealing treatment and without-surface-modification alloys. The electrochemical behavior of the five groups investigated showed similar high resistance to corrosion solution under all conditions.
Patricia Capellato; Daniela Sachs; Filipe Bueno Vilela; Mirian M. Melo; Gilbert Silva; Geovani Rodrigues; Cecilia A. De C. Zavaglia; Roberto Z. Nakazato; Ana Paula R. A. Claro. Influence of Annealing Temperature on Corrosion Resistance of TiO2 Nanotubes Grown on Ti–30Ta Alloy. Metals 2020, 10, 1106 .
AMA StylePatricia Capellato, Daniela Sachs, Filipe Bueno Vilela, Mirian M. Melo, Gilbert Silva, Geovani Rodrigues, Cecilia A. De C. Zavaglia, Roberto Z. Nakazato, Ana Paula R. A. Claro. Influence of Annealing Temperature on Corrosion Resistance of TiO2 Nanotubes Grown on Ti–30Ta Alloy. Metals. 2020; 10 (8):1106.
Chicago/Turabian StylePatricia Capellato; Daniela Sachs; Filipe Bueno Vilela; Mirian M. Melo; Gilbert Silva; Geovani Rodrigues; Cecilia A. De C. Zavaglia; Roberto Z. Nakazato; Ana Paula R. A. Claro. 2020. "Influence of Annealing Temperature on Corrosion Resistance of TiO2 Nanotubes Grown on Ti–30Ta Alloy." Metals 10, no. 8: 1106.
The current metallic biomaterial still presents failures associated with the bulk alloy and the interface of material/human body. In previous studies, titanium alloy with tantalum showed the elastic modulus decrease in comparison with that of commercially pure (cp) titanium. In this study, surface modification on Ti-30Ta alloy was investigated. Titanium and tantalum were melted, homogenized, cold-worked by a rotary swaging process and solubilized. The anodization process was performed in electrolyte contained glycerol + NH4F 0.25% at 30 V using seven different durations—4 h, 5 h, 6 h, 7 h, 8 h, 9 h, and 10 h and annealed at 530 °C for 1 h. The surface topography was characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM) measurements, X-ray diffraction analysis (XRD), and contact angle. From the results, we conclude the time of anodization process influences the shape and morphology of the anodized layer. The 5 h-anodization process produced a smooth and porous surface. The 4-, 6-, 7-, 8-, 9-, and 10-h conditions showed nanotubes morphology. All surfaces are hydrophilic (<90°). Likewise, all the investigated conditions present anatase phase. So, this surface modification presents potential for biomedical application. However, more work needs to be done to better understand the influence of time on the anodization process.
Patricia Capellato; Daniela Sachs; Lucas V. B. Vasconcelos; Miriam M. Melo; Gilbert Silva; Maria G. A. Ranieri; Cecilia A. De C. Zavaglia; Roberto Z. Nakazato; Ana P. R. Alves Claro. Optimization of Anodization Parameters in Ti-30Ta Alloy. Metals 2020, 10, 1059 .
AMA StylePatricia Capellato, Daniela Sachs, Lucas V. B. Vasconcelos, Miriam M. Melo, Gilbert Silva, Maria G. A. Ranieri, Cecilia A. De C. Zavaglia, Roberto Z. Nakazato, Ana P. R. Alves Claro. Optimization of Anodization Parameters in Ti-30Ta Alloy. Metals. 2020; 10 (8):1059.
Chicago/Turabian StylePatricia Capellato; Daniela Sachs; Lucas V. B. Vasconcelos; Miriam M. Melo; Gilbert Silva; Maria G. A. Ranieri; Cecilia A. De C. Zavaglia; Roberto Z. Nakazato; Ana P. R. Alves Claro. 2020. "Optimization of Anodization Parameters in Ti-30Ta Alloy." Metals 10, no. 8: 1059.
Nos últimos anos, diversas pesquisas têm sido realizadas buscando o desenvolvimento de materiais para aplicações biomédicas. E, um dos objetivos desses estudos, é otimizar o comportamento da interface material/meio biológico. Dentre os materiais mais utilizados, estão o titânio e suas ligas devido às suas propriedades como resistência à corrosão e biocompatibilidade. Estudos constataram que o comportamento celular pode ser influenciado por alterações na morfologia das superfícies. Dessa maneira, o objetivo deste estudo foi associar a deposição de fibras poliméricas de PCL com o crescimento de nanotubos de TiO2 na superfície da liga Ti-30Ta para aplicações biomédicas. O processo de eletrofiação foi usado para a produção de nanofibras de polímero com 200 nm, devido em grande parte, ao aumento do interesse em propriedades e tecnologias em nanoescala. O uso de polímeros biocompatíveis para a viabilidade do crescimento celular é uma alternativa promissora para melhorar a osseointegração. Técnicas de caracterização como microscopia eletrônica de varredura (MEV-FEG) foi usado para investigar a superfície das amostras. Também foram utilizadas células-tronco adultas derivadas de tecido adiposo humano (ADSC) para estudar a resposta celular desses biomateriais. A viabilidade celular foi determinada pelo ensaio Cell Titer-Blue após 1 e 7 dias. Os resultados indicaram que as alterações na nanoarquitetura das características morfológicas das nanoestruturas na micro-topografia, podem ser promissoras no campo biomédico devido à modulação da resposta celular.
Patrícia Capellato; Gilbert Silva; Maria Gabriela Araújo Ranieri; Mirian De Lourdes Noronha Motta Melo; Samira Esteves Afonso Camargo; Cecilia Amélia De Carvalho Zavaglia; Ana Paula Rosifini Alves Claro; Tainara Aparecida Nunes Ribeiro; Mariana Da Silva Novakoski; Daniela Sachs. Avaliação da biocompatibilidade do polímero PCL recobrindo a liga Ti-30Ta. Research, Society and Development 2020, 9, 1 .
AMA StylePatrícia Capellato, Gilbert Silva, Maria Gabriela Araújo Ranieri, Mirian De Lourdes Noronha Motta Melo, Samira Esteves Afonso Camargo, Cecilia Amélia De Carvalho Zavaglia, Ana Paula Rosifini Alves Claro, Tainara Aparecida Nunes Ribeiro, Mariana Da Silva Novakoski, Daniela Sachs. Avaliação da biocompatibilidade do polímero PCL recobrindo a liga Ti-30Ta. Research, Society and Development. 2020; 9 (8):1.
Chicago/Turabian StylePatrícia Capellato; Gilbert Silva; Maria Gabriela Araújo Ranieri; Mirian De Lourdes Noronha Motta Melo; Samira Esteves Afonso Camargo; Cecilia Amélia De Carvalho Zavaglia; Ana Paula Rosifini Alves Claro; Tainara Aparecida Nunes Ribeiro; Mariana Da Silva Novakoski; Daniela Sachs. 2020. "Avaliação da biocompatibilidade do polímero PCL recobrindo a liga Ti-30Ta." Research, Society and Development 9, no. 8: 1.
Novas metodologias têm surgido com o objetivo de complementar e auxiliar na fixação dos conhecimentos, entre elas os métodos de educação ativa. O objetivo deste trabalho foi empregar uma ferramenta de educação ativa por meio de metodologia de estudo de caso. Assim, avaliar a competência crítica utilizada em avaliações objetivas, subjetivas, a autoavaliação e analisar os resultados obtidos de maneira qualitativa. Os alunos desenvolveram conteúdo para apresentar em forma de seminários, instruídos a avaliar seus pares de forma objetiva (atribuindo notas) e subjetiva (selecionando de acordo com preferência) e também realizaram a autoavaliação. Avaliou-se a partir das notas atribuídas pelos alunos, a capacidade de avaliação por pares por meio de comparação de variâncias. A partir dos resultados obtidos, podemos concluir que há mútua influência sobre os dois tipos de avaliações empregadas nesta pesquisa. Os alunos se apresentaram aptos a avaliar seus pares e também a autoavaliação. Há coerência entre diferentes avaliadores e também quando comparado à autocrítica. A partir da pesquisa foi possível observar a preferência crescente dos alunos por esta metodologia de ensino.
Patrícia Capellato; Lucas Victor Benjamim Vasconcelos; Maria Gabriela Araujo Ranieri; Daniela Sachs. Método de ensino ativo utilizando avaliação por pares e autoavaliação. Research, Society and Development 2020, 9, e21973495 .
AMA StylePatrícia Capellato, Lucas Victor Benjamim Vasconcelos, Maria Gabriela Araujo Ranieri, Daniela Sachs. Método de ensino ativo utilizando avaliação por pares e autoavaliação. Research, Society and Development. 2020; 9 (7):e21973495.
Chicago/Turabian StylePatrícia Capellato; Lucas Victor Benjamim Vasconcelos; Maria Gabriela Araujo Ranieri; Daniela Sachs. 2020. "Método de ensino ativo utilizando avaliação por pares e autoavaliação." Research, Society and Development 9, no. 7: e21973495.
The polymers poly(ε‐caprolactone) (PCL) has been used in biomaterial field for its relatively inexpensive price and suitability for modification. Also, its chemical and biological properties are desirable on the biomedical application. The electrospinning process has been used for producing polymer fibers of PCL due in large part to an increased interest in nanoscale properties and technologies. Moreover, the use of biocompatible polymers for the viability of cell growth is a promising alternative to improve osseointegration. Characterization techniques such as scanning electron microscopy (SEM) and contact angle were used for samples analyses. Adult Human dermal fibroblasts (HDF, neonatal) were utilized to evaluate the biocompatibility of the association of the electrospinning process of the biocompatible polymer (PCL) with TiO2 nanotubes on the Ti‐30Ta alloy surface. The results of this study showed a favorable response for adhesion on the surface. This promising material is due to the modulation of the biological response.
Patrícia Capellato; Gilbert Silva; Ketul Popat; Rachael Simon‐Walker; Ana Paula Alves Claro; Cecilia Zavaglia. Cell investigation into the biocompatibility of adult human dermal fibroblasts with PCL nanofibers/TiO 2 nanotubes on the surface of Ti–30Ta alloy for biomedical applications. Artificial Organs 2020, 44, 877 -882.
AMA StylePatrícia Capellato, Gilbert Silva, Ketul Popat, Rachael Simon‐Walker, Ana Paula Alves Claro, Cecilia Zavaglia. Cell investigation into the biocompatibility of adult human dermal fibroblasts with PCL nanofibers/TiO 2 nanotubes on the surface of Ti–30Ta alloy for biomedical applications. Artificial Organs. 2020; 44 (8):877-882.
Chicago/Turabian StylePatrícia Capellato; Gilbert Silva; Ketul Popat; Rachael Simon‐Walker; Ana Paula Alves Claro; Cecilia Zavaglia. 2020. "Cell investigation into the biocompatibility of adult human dermal fibroblasts with PCL nanofibers/TiO 2 nanotubes on the surface of Ti–30Ta alloy for biomedical applications." Artificial Organs 44, no. 8: 877-882.
During the last decades, researchers have been growing the interest in surface treatment with an antimicrobial agent. Silver nanoparticles (AgNPs) are widely used in biomedical fields due to their potent antimicrobial activity. So, in this study was investigated silver particles (isles) coated on titanium surface for dental and orthopedic application. Silver particles coating process on titanium surface were performed via sputtering that is a plasma-assisted deposition technique with and titanium without treatment was applied as comparing standard. Plasma treatment parameters were optimized so that the result was not a thin film of Ag but dispersed particles of Ag on the Ti-cp surface. The alloy surfaces were investigated using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). In order to investigate antibacterial potential Staphylococcus aureus and Escherichia coli have been used at Agar diffusion assay. The results were analyzed by analysis of variance (ANOVA) in order to verify significant difference antimicrobial activity between samples that have shown no difference between the surfaces studied treatments. For silver deposition scattered particles (isles) over titanium surface for a 10-minute treatment, EDS revealed by silver clusters that the particles were not properly scattered onto surface, hence, the low effectiveness in antibacterial activity.
Patrícia Capellato; Cláudia Eliana Bruno Marino; Gilbert Silva; Lucas Victor Benjamim Vasconcelos; Rodrigo Perito Cardoso; Kayam Hamdar; Daniela Sachs. Surface treatment with silver particles isles on Titanium cp: study of antimicrobial activity. Research, Society and Development 2020, 9, e27942662 .
AMA StylePatrícia Capellato, Cláudia Eliana Bruno Marino, Gilbert Silva, Lucas Victor Benjamim Vasconcelos, Rodrigo Perito Cardoso, Kayam Hamdar, Daniela Sachs. Surface treatment with silver particles isles on Titanium cp: study of antimicrobial activity. Research, Society and Development. 2020; 9 (4):e27942662.
Chicago/Turabian StylePatrícia Capellato; Cláudia Eliana Bruno Marino; Gilbert Silva; Lucas Victor Benjamim Vasconcelos; Rodrigo Perito Cardoso; Kayam Hamdar; Daniela Sachs. 2020. "Surface treatment with silver particles isles on Titanium cp: study of antimicrobial activity." Research, Society and Development 9, no. 4: e27942662.
There are a class of material widely used in bone tissue repair. This material is calcium phosphate ceramics (CPCs)that can be used on two phases: α and β. However, β-TCP is more used in bone regeneration than α–TCP due to the biocompatible and bioactive properties.In the present work evaluate the influence of these two distinct processes to deagglomeration and the consequence in the particle size of the β-TCP obtained through solid-state reaction. Among all of the routes used in research and industry to reduce the particles size of different materials, the high energy ball milling is one of the most effective, due to the high rotation speed that this process achieves. The deagglomeration through agate mortar is considered a cheaper process when compared with the high energy ball milling. The characterization of both powders, deagglomerated in high energy ball milling and agate mortar, was realized through scanning electron microscopy, to analyze the powder morphology, and laser granulometry, to determine the size of the particles. Also, the forerunner powder was previously submitted to x-ray diffraction to confirm the formation of the β-TCP phase. The analysis through x-ray diffraction confirmed that the phase formed during the calcination process corresponded to the β-TCP. The results obtained after the deagglomeration processes indicated that the morphology was predominantly irregular for both powders. In relation to the granulometry, the deagglomeration performed through agate mortar showed to produce particles with smaller size (11,4µm e 0,9µm) and heterogeneous distribution, while the high energy ball milling process produced particles with larger size (11,4µm a 1,8µm) and higher homogeneity.
João Augusto Martins Almeida; Bruna Horta Bastos Kuffner; Gilbert Silva; Patrícia Capellato; Daniela Sachs. Analysis of the influence of β-TCP particle size on deagglomeration processes. Research, Society and Development 2020, 9, e175943067 .
AMA StyleJoão Augusto Martins Almeida, Bruna Horta Bastos Kuffner, Gilbert Silva, Patrícia Capellato, Daniela Sachs. Analysis of the influence of β-TCP particle size on deagglomeration processes. Research, Society and Development. 2020; 9 (4):e175943067.
Chicago/Turabian StyleJoão Augusto Martins Almeida; Bruna Horta Bastos Kuffner; Gilbert Silva; Patrícia Capellato; Daniela Sachs. 2020. "Analysis of the influence of β-TCP particle size on deagglomeration processes." Research, Society and Development 9, no. 4: e175943067.
Several studies have been carried out to develop new materials for biomedical applications. Material surfaces that present biomimetic morphology like nanotubes or nanofibers that provides nanoscale architectures have been shown to alter cell/biomaterial interactions. The coated surface biomaterial with biocompatible polymers and nanotubes of TiO2 is an alternative to improve osseointegration. The anodization process was performed to obtain nanotubes of TiO2 covering the Ti-30Ta alloy surface and the electrospinning process has been used for producing polymer fibers. Characterization techniques such as scanning electron microscopy (SEM - FEG), X-ray diffraction analysis (X-rays), thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC) and contact angle were used for samples analyses. Adult human adipose-derived stem cells (ADSCs) were used to investigate the cellular response and S. aureus antimicrobial activity on these coated surfaces. The results indicated that both surface modification treatment showed a favorable micro-environment for cells growth and proliferation such as adhesion, viability and morphology which is a desire property for an implant. In addition, the antimicrobial activity study presented both materials with similar growth of S. aureus. So, it can conclude nanotubes and nanofibers can be used at biomedical field and both present similar cell evaluation and antimicrobial activity results.
Patricia Capellato; Samira E. A. Camargo; Gilbert Silva; Daniela Sachs; Filipe Bueno Vilela; Cecilia A. De C. Zavaglia; Ketul C. Popat; Ana P.R. Alves Claro. Coated Surface on Ti-30Ta Alloy for Biomedical Application: Mechanical and in-vitro Characterization. Materials Research 2020, 23, 1 .
AMA StylePatricia Capellato, Samira E. A. Camargo, Gilbert Silva, Daniela Sachs, Filipe Bueno Vilela, Cecilia A. De C. Zavaglia, Ketul C. Popat, Ana P.R. Alves Claro. Coated Surface on Ti-30Ta Alloy for Biomedical Application: Mechanical and in-vitro Characterization. Materials Research. 2020; 23 (6):1.
Chicago/Turabian StylePatricia Capellato; Samira E. A. Camargo; Gilbert Silva; Daniela Sachs; Filipe Bueno Vilela; Cecilia A. De C. Zavaglia; Ketul C. Popat; Ana P.R. Alves Claro. 2020. "Coated Surface on Ti-30Ta Alloy for Biomedical Application: Mechanical and in-vitro Characterization." Materials Research 23, no. 6: 1.
Esse trabalho é uma revisão bibliográfica de obras de vários autores sobre a escrita científica. Esse estudo sistemático foi desenvolvido com o objetivo de nortear os alunos durante o processo de elaboração de uma dissertação de mestrado com qualidade. Pois, A maioria dos programas de pós-graduação stricto sensu – no nível de mestrado – exige a escrita e entrega de uma dissertação para fins de conclusão do curso e obtenção do título de mestre. Nos últimos anos, muitos autores têm confirmado a baixa qualidade das dissertações de mestrado à nível mundial. Pois, escrever um texto acadêmico requer um conjunto de habilidades e competências do pesquisador. Assim, este artigo tem como objetivo apresentar um conjunto de diretrizes para a elaboração de uma boa dissertação de mestrado, através de análise bibliográfica de alguns dos artigos mais recentes sobre o assunto. Como resultado, é apresentada uma compilação das principais orientações voltadas à redação de dissertação de mestrado, tanto com relação à estrutura quanto ao seu conteúdo. Conclui-se que é importante e necessário fortalecer o preparo de alunos de mestrado para a escrita científica.
Maria Gabriela Araujo Ranieri; Anna Carolina De Siqueira Ferreira; Patrícia Capellato; Gilbert Silva; Luiz Felipe Silva. Como escrever uma dissertação de mestrado. Research, Society and Development 2019, 9, e149932584 .
AMA StyleMaria Gabriela Araujo Ranieri, Anna Carolina De Siqueira Ferreira, Patrícia Capellato, Gilbert Silva, Luiz Felipe Silva. Como escrever uma dissertação de mestrado. Research, Society and Development. 2019; 9 (3):e149932584.
Chicago/Turabian StyleMaria Gabriela Araujo Ranieri; Anna Carolina De Siqueira Ferreira; Patrícia Capellato; Gilbert Silva; Luiz Felipe Silva. 2019. "Como escrever uma dissertação de mestrado." Research, Society and Development 9, no. 3: e149932584.
The aim of this study was to provide an experimental investigation on the novel method for recycling chips of duplex stainless steel, with the addition of vanadium carbide, in order to produce metal/carbide composites from a high-energy mechanical milling process. Powders of duplex stainless steel with the addition of vanadium carbide were prepared by high-energy mechanical ball milling utilizing a planetary ball mill. For this proposal, experiments following a full factorial design with two replicates were planned, performed, and then analyzed. The four factors investigated in this study were rotation speed, milling time, powder to ball weight ratio and carbide percentage. For each factor, the experiments were conducted into two levels so that the internal behavior among them could be statistically estimated: 250 to 350 rpm for rotation speed, 10 to 50 h for milling time, 10:1 to 22:1 for powder to ball weight ratio, and 0 to 3% carbide percentage. In order to measure and characterize particle size, we utilized the analysis of particle size and a scanning electron microscopy. The results showed with the addition of carbide in the milling process cause an average of reduction in particle size when compared with the material without carbide added. All the four factors investigated in this study presented significant influence on the milling process of duplex stainless steel chips and the reduction of particle size. The statistical analysis showed that the addition of carbide in the process is the most influential factor, followed by the milling time, rotation speed and powder to ball weight ratio. Significant interaction effects among these factors were also identified.
Claudiney Mendonça; Patricia Capellato; Emin Bayraktar; Fábio Gatamorta; José Gomes; Adhimar Oliveira; Daniela Sachs; Mirian Melo; Gilbert Silva. Recycling Chips of Stainless Steel Using a Full Factorial Design. Metals 2019, 9, 842 .
AMA StyleClaudiney Mendonça, Patricia Capellato, Emin Bayraktar, Fábio Gatamorta, José Gomes, Adhimar Oliveira, Daniela Sachs, Mirian Melo, Gilbert Silva. Recycling Chips of Stainless Steel Using a Full Factorial Design. Metals. 2019; 9 (8):842.
Chicago/Turabian StyleClaudiney Mendonça; Patricia Capellato; Emin Bayraktar; Fábio Gatamorta; José Gomes; Adhimar Oliveira; Daniela Sachs; Mirian Melo; Gilbert Silva. 2019. "Recycling Chips of Stainless Steel Using a Full Factorial Design." Metals 9, no. 8: 842.
O presente estudo buscou avaliar algumas metodologias ativas no processo de ensino-aprendizagem através da utilização dos seminários em conjunto com a técnica de sala de aula invertida como ferramenta educacional. Participaram deste estudo alunos da graduação do curso de Engenharia da Universidade Federal de Itajubá, em Minas Gerais, focando na componente curricular de Química Geral. A proposta constituiu na apresentação de três temas associados às Ligações Químicas: Estrutura de Lewis, Regra do Octeto e Ligação Iônica. Assim, a turma foi dividida em grupos e para cada grupo atribuiu-se um determinado tema. A avaliação do método como eficaz ou não, foi realizada considerando a opinião dos próprios discentes através de um questionário avaliativo. Os resultados obtidos através da aplicação dessa metodologia foram satisfatórios, visto que grande parte da turma contribuiu de forma positiva para que os seminários fossem concluídos. Através deste estudo conclui-se que as metodologias ativas são responsáveis por promover habilidades tanto sociais quanto acadêmicas no discente, como discussão, argumentação, oratória e audição, conferindo assim uma maior dinamicidade ao processo de ensino-aprendizagem.
Patrícia Capellato; Larissa Mayra Silva Ribeiro; Daniela Sachs. Metodologias Ativas no Processo de Ensino-Aprendizagem Utilizando Seminários como Ferramentas Educacionais no Componente Curricular Química Geral. Research, Society and Development 2019, 8, e50861090 .
AMA StylePatrícia Capellato, Larissa Mayra Silva Ribeiro, Daniela Sachs. Metodologias Ativas no Processo de Ensino-Aprendizagem Utilizando Seminários como Ferramentas Educacionais no Componente Curricular Química Geral. Research, Society and Development. 2019; 8 (6):e50861090.
Chicago/Turabian StylePatrícia Capellato; Larissa Mayra Silva Ribeiro; Daniela Sachs. 2019. "Metodologias Ativas no Processo de Ensino-Aprendizagem Utilizando Seminários como Ferramentas Educacionais no Componente Curricular Química Geral." Research, Society and Development 8, no. 6: e50861090.
Lean duplex stainless steels consist of a low percentage of nickel and molybdenum, presenting twice as much resistance compared to austenitic stainless steel and their cost is about twice as low. However, this class of steels has microstructural instabilities, such as the formation of martensite induced by austenite deformation by cold rolling. This feature can significantly alter the properties of interest of this steel. The formation of the martensitic structure, as well as its reversion, is little studied in the steels of the austenitic–ferritic structure. The process of formation and reversal of the martensitic structure in cold rolled stainless steel duplex UNS S32304 was investigated through magnetic measurements, microhardness and X-ray diffraction analyzes. The deformation process allowed the formation of the -martensite phase from the austenite phase with an increase in the values of saturation magnetization, coercive field and micro-hardness values as well as a change in the intensity of the X-ray diffraction peaks. The heat treatment performed at \(650\,^\circ \hbox {C}\) showed an increase in the peak intensity of the austenitic phase and a decrease in the saturation magnetization values, demonstrating a possible reversal of the martensitic structure. The SEM observations after annealing the Beraha’s etched samples revealed the possibility of a martensite transformation and reversion in a Lean duplex stainless steels.
C. S. P. Mendonça; R. A. G. Matos; J. Mendes; M. L. N. M. Melo; G. Rodrigues; M. R. Da Silva; G. Silva. Study of Formation and Reversion of the Martensitic Phase Induced by Deformation of Lean Duplex Stainless Steel. Journal of Nondestructive Evaluation 2018, 37, 64 .
AMA StyleC. S. P. Mendonça, R. A. G. Matos, J. Mendes, M. L. N. M. Melo, G. Rodrigues, M. R. Da Silva, G. Silva. Study of Formation and Reversion of the Martensitic Phase Induced by Deformation of Lean Duplex Stainless Steel. Journal of Nondestructive Evaluation. 2018; 37 (3):64.
Chicago/Turabian StyleC. S. P. Mendonça; R. A. G. Matos; J. Mendes; M. L. N. M. Melo; G. Rodrigues; M. R. Da Silva; G. Silva. 2018. "Study of Formation and Reversion of the Martensitic Phase Induced by Deformation of Lean Duplex Stainless Steel." Journal of Nondestructive Evaluation 37, no. 3: 64.
Due to the increased consumption of raw materials, energy, and the waste it generates, recycling has become very important and fundamental for the environment and the industrial sector. The production of duplex stainless–steel powders with the addition of vanadium carbide in the high energy mechanical milling process is a new method for recycling materials for the manufacture of components in the industrial sector. This study aims to reuse the chips from the duplex stainless–steel UNS S31803 by powder metallurgy with the addition of Vanadium carbide (VC). The mechanical milling was performed using a planetary ball mill for 50 h at a milling speed of 350 rpm and a ball-to-powder weight ratio of 20:1, and the addition of 3 wt % of VC. The material submitted to milling with an addition of carbide has a particle size of less than 140 μm. After milling, the sample went through a stress relief treatment performed at 1050 °C for 1 h and the isostatic compaction process loaded with 300 MPa. The sintered powders and material was characterized by scanning electron microscopy, X-ray diffraction, and micro-hardness tests. The milling process with an addition of 3% VC produced a particle size smaller than the initial chip size. The measurement of micrometric sizes obtained was between 26 and 132 μm. The sintered material had a measurement of porosity evaluated at 15%. The obtained density of the material was 84% compared to the initial density of the material as stainless–steel duplex UNS S31803. The value of the microhardness measurement was 232 HV. The material submitted for grinding presented the formation of a martensitic structure and after the thermal treatment, the presence of ferrite and austenite phases was observed. Thus, in conclusion, this study demonstrates the efficacy in the production of a metal-ceramic composite using a new method to recycle stainless–steel duplex UNS S31803 chips.
Mendonça Claudiney; Oliveira Adhimar; Sachs Daniela; Capellato Patricia; Ribeiro Vander; Junqueira Mateus; Melo Mirian; Silva Gilbert. A New Method to Recycle Stainless–Steel Duplex UNS S31803 Chips. Metals 2018, 8, 546 .
AMA StyleMendonça Claudiney, Oliveira Adhimar, Sachs Daniela, Capellato Patricia, Ribeiro Vander, Junqueira Mateus, Melo Mirian, Silva Gilbert. A New Method to Recycle Stainless–Steel Duplex UNS S31803 Chips. Metals. 2018; 8 (7):546.
Chicago/Turabian StyleMendonça Claudiney; Oliveira Adhimar; Sachs Daniela; Capellato Patricia; Ribeiro Vander; Junqueira Mateus; Melo Mirian; Silva Gilbert. 2018. "A New Method to Recycle Stainless–Steel Duplex UNS S31803 Chips." Metals 8, no. 7: 546.
This study aims to analyze the efficiency of additional carbides in the high-energy milling of duplex stainless steel chips. At the end of the life of a mechanical component, it is discarded in deposits or recast. Chips originating from machining processes are raw materials for products obtained through powder metallurgy. To obtain the duplex structure for a stainless steel, rolled and annealing are necessary subsequent steps, making this cycle costly for the industry, and its disposal leads to environmental problems. Components produced by powder metallurgy from corrosion-resistant alloys are considered advantageous. The addition of carbides aims to increase the efficiency of the milling process and improve the mechanical properties of the steels produced by powder metallurgy. The granulometric analysis and the scanning electron microscopy were used in the characterization and identification of the particle size. Results indicated that the milling with the addition of carbides showed a higher efficiency in the milling process. The particle size obtained with the addition of TiC and NbC in the milling of UNS S 31803 steel chips was 98 and 85 times smaller than the original chip.
C. S. P. Mendonça; V. D. De Oliveira; Adhimar Oliveira; L. R. Silveira; B. G. Andrade; G. Silva. Comparison of the effect of carbide addition on particle size reduction on UNS S31803 steel chip millings. The International Journal of Advanced Manufacturing Technology 2018, 98, 1755 -1761.
AMA StyleC. S. P. Mendonça, V. D. De Oliveira, Adhimar Oliveira, L. R. Silveira, B. G. Andrade, G. Silva. Comparison of the effect of carbide addition on particle size reduction on UNS S31803 steel chip millings. The International Journal of Advanced Manufacturing Technology. 2018; 98 (5-8):1755-1761.
Chicago/Turabian StyleC. S. P. Mendonça; V. D. De Oliveira; Adhimar Oliveira; L. R. Silveira; B. G. Andrade; G. Silva. 2018. "Comparison of the effect of carbide addition on particle size reduction on UNS S31803 steel chip millings." The International Journal of Advanced Manufacturing Technology 98, no. 5-8: 1755-1761.