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Herbicides applied in PRE-emergence enables sustainable weed control. The objective of this study was to evaluate the control of gallant soldier (Galinsoga parviflora) with the residual herbicides oxyfluorfen, flumioxazin, and linuron in soils cultivated with garlic from two regions of Brazil: Rio Paranaíba-MG (Oxisol) and Curitibanos-SC (Ultisol). The efficiency of the herbicides was evaluated at the following doses: oxyfluorfen (0, 3, 6, 12, 24, 48, 96, 192, 384, and 768 g a.i. ha−1), flumioxazin (0, 2, 4, 6, 8, 15, 30, 40, 60, and 120 g a.i. ha−1), and linuron (0, 30, 40, 50, 100, 200, 400, 800, 1600, and 2430 g a.i. ha−1). The degree of damage on the 7th, 14th, and 21st day after emergence (DAE) and dry matter on the 21st day after emergence (DAE) were determined to evaluate the control (C80) and the growth reduction (GR80) of 80% of the plant, respectively, compared to the treatment without herbicide. Three herbicides were effective at the control of G. parviflora, with the C80 at 21 DAE on Ultisol being 81.82, 4.59, and 141.26 g a.i. ha−1, and a GR80 of 61, 8.3, and 151.3 g a.i. ha−1 for oxyfluorfen, flumioxazin, and linuron, respectively. On the other hand, on Oxisol (lower clay content and soil organic matter), the doses were lower, with the C80 at 21 DAE at 20.85, 3.50, and 118 g a.i. ha−1, and a GR80 of 54, 4.03, and 101.23 g a.i. ha−1, respectively. This weed showed higher control under flumioxazin compared to the other herbicides in both soils. The use of low doses of residual herbicides contributes to sustainable weed control in garlic growing in the field.

Antistatic packagings are very important for proper transportation and storage of electronic components since these components can be damaged with electric overloads generated through rubbing. Therefore, the purpose of this study was to develop an innovative material for antistatic packaging with a sustainable character. For this, a blend of recycled poly(ethylene terephthalate) (PET), polycarbonate (PC), and polyaniline (PAni) was prepared by melt extrusion. Samples have a final content of 68 wt% of PET, 29 wt% of PC, and 3 wt% of PAni doped with cobalt (PAni-Co). The properties were determined by differential scanning calorimetry, thermogravimetric analysis, tensile testing, electrical resistivity analysis, and Fourier transform infrared spectroscopy. To the best of our knowledge, no previous work studied the incorporation of PAni-Co in PET/PC blend.

Enterobactérias com fator infeccioso de resistência a drogas, foram isoladas em fezes de 113 crianças internadas no Instituto de Puericultura da U.F.R.J e no Hospital Jesus nos períodos 1960-1964 e 1970-1973, verificando-se que 71,6% das crianças excretaram bactérias resistentes, das quais 41,3% a uma única droga e 58,7% a várias drogas.Enterobacteriae with R factor were isolated from faeces of 113 children interned in the Instituto de Puericultura da U.F.R.J. and Hospital Jesus in the periods of 1960-1964 and 1970-1973. The results obtained show that a high percentage og the children 71,6% eliminated resistant bacterias of wich 41,3% was resistant to one drug and 58,7% was resistant to various drugs.

Submitted by Ricardo Carrasco (ricardogc84@uepb.edu.br) on 2019-11-01T17:23:32Z No. of bitstreams: 1 DISSERTAÇÃO - LUZIVONE LOPES GOMES.pdf: 2732606 bytes, checksum: ec7865fd03e5f44d0a5d997676150661 (MD5) Approved for entry into archive by João Costa (joaocosta@uepb.edu.br) on 2019-11-06T23:41:14Z (GMT) No. of bitstreams: 1 DISSERTAÇÃO - LUZIVONE LOPES GOMES.pdf: 2732606 bytes, checksum: ec7865fd03e5f44d0a5d997676150661 (MD5) Made available in DSpace on 2019-11-06T23:41:14Z (GMT). No. of bitstreams: 1 DISSERTAÇÃO - LUZIVONE LOPES GOMES.pdf: 2732606 bytes, checksum: ec7865fd03e5f44d0a5d997676150661 (MD5) Previous issue date: 2015-09-11 Digital world is increasingly developed. Images, sounds and texts converge, enabling new expression, communication and interaction forms both in real and virtual world. It is suggested for many Education areas a variety of midias: videos, animation, websites, games, platforms, social networks modeling and simulation software as well as other applications that may contribute to enhance the quality of experiences, as well as teaching and learning situations. When it comes to Science teaching, digital resources use in the classroom is even more required. There are resources that can make playful teaching and arouse lerning interest in students, such as P3D educational software and other resources. In this context, the question is: What are P3D educational software impacts in teaching and learning Science? The purpose of this exploratory and descriptive study was to research P3D educational software and its impact as a resource to rethink Science teaching and learning practice. The subjects were a teacher and 40 8th-grade students from a private elementary located at Campina Grande (Paraíba, Brazil). In order to collect data, we used participant observation and semi-structured interviews with the students and the teacher. We are grounded in Lévy (1999, 2004), Veen & Vrakking (2009), Prensky (2001, 2010), Moita (2006, 2007, 2013), Ramos (2013), Tori (2010), Nóvoa (2009), Kensky (2013), Amabis (2001), among others. The study revealed that P3D educational software use improved participation, engagement and student achievement in Science classes. According to collected data, it was found that students showed more motivation, concentration, participation, interaction and attention in class and the teacher was driven to propose new strategies and ways to approach the content. Students’ point of view revealed that environmental exploration in three dimensions (3D) allowed a better understanding of the role, functioning and structure of the digestive system organs. The study obtained as a product an interactive didactic sequence (IDS) dedicated to Science teaching, driven to 3D digital resources use in teaching practice. O mundo está cada vez mais digital. Imagens, sons e textos convergem, possibilitando novas formas de expressão, comunicação e interação em mundos reais e virtuais. Para diversas áreas da educação, é sugerida uma variedade de recursos: vídeos, animação, sites, jogos, plataformas, redes sociais software de modelação e simulação, bem como outros tipos de aplicações, que podem contribuir para a qualidade das experiências e situações de ensino e de aprendizagem. Para o ensino de Ciências, cada vez mais, surgem recursos que podem tornar o ensino lúdico e despertar no aluno interesse por aprender, a exemplo do software educativo P3D e outros recursos. Devido a esse contexto, questionou-se: Quais os impactos do uso do software educativo P3D no ensino e na aprendizagem de Ciências? O objetivo deste estudo, de natureza exploratória e descritiva, foi pesquisar sobre o software educativo P3D e o seu impacto como recurso para se repensar a prática de ensinar e aprender Ciências. Os sujeitos foram um professor e 40 alunos do 8º ano do Ensino Fundamental de uma instituição privada da cidade de Campina Grande-PB. Para a coleta dos dados, foram utilizadas a observação participante e entrevistas semiestruturadas com os alunos e o professor. Toma-se como aporte teórico estudos de Lévy (1999, 2004), Veen & Vrakking (2009), Prensky (2001, 2010), Moita (2006, 2007, 2013), Ramos (2013), Tori (2010), Nóvoa (2009), Kensky (2013), Amabis (2001), entre outros. O estudo revelou que o uso do software educativo P3D melhorou a participação, o engajamento e o rendimento dos alunos nas aulas de Ciências. De acordo com os dados coletados, ficou constatado que os alunos demonstraram mais motivação, concentração, participação, interação e atenção durante a aula e o professor foi impulsionado a propor novas estratégias e formas de abordar os conteúdos. Para os alunos, a exploração do ambiente em três dimensões (3D) possibilitou uma melhor compreensão da função, do funcionamento e das estruturas dos órgãos do sistema digestório. O estudo realizado obteve como produto uma sequência didática interativa (SDI) voltada para o ensino de Ciências, quando da utilização de recursos digitais em três dimensões (3D) na prática pedagógica.