999 resultados para plástico


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The ground cover is an agricultural practice that is designed mainly to control weeds, while the nonwoven prevents the attack of pests. The objective of this study was to evaluate the yield and fruit quality of watermelon grown under nonwoven textile protection combined with plastic mulching. The experiment was conducted at the WG Fruits Company, Baraúna, RN. A randomized block design was used in a factorial 3 x 3 + 1 with four replications, and 36 plants per plot, with the first factor of color of plastic used in mulching (black, silver and white) and the second factor nonwoven textile with different times of use (first and third crop nonwoven under textile and without nonwoven) and an absolute control (no mulching and without nonwoven). The production variables evaluated were: yield (commercial, noncommercial, and total fruit yield), and fruit quality (soluble solids - SS, titratable acidity - TA and SS/TA). The use of mulching and protection of plants with nonwoven textile provided a higher yield of watermelon fruits in relation to bare soil with and without nonwoven textile protection. Fruit quality was not affected by the use of mulching and nonwoven.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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This study aims to prove the economic feasibility of the installation of mechanical compression chillers on plastic injection molding machines in order to reduce the production cycle time of toothbrush cables in a specific case study. This evidence was confirmed by the comparative analysis of the system replaced and the new system installed. The old system had only one closed loop cooling tower which pumped chilled water to the injection molds, and the new system has the same tower sending cold water to the condensers of individual chillers installed on each injection machine. We conducted an analysis of energy efficiency in each system, showing that in terms of thermal efficiency virtually nothing has changed, but in terms of electricity demand the new system consumes 60.3 kW more. We conducted an analysis of machine productivity for both systems, showing a much higher productivity of the new system due to reduced cycle times caused by the presence of chillers and their greater cooling capacities. Equipped with data such as electricity rates, increases in operating costs and initial investments, the increase in consumption and demand of electricity plus the cycle time reduction were also calculated over so the simple payback 1 year and 2 months was reached

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This work aims to study and see the importance of building the image and reputation of the artist through a publishing of public relations, public recital, new technologies, media, cultural production and curatorial work. To this, we analyzed the history of the profession of public relations in Brazil. As well as their concepts, practices and definitions. Focus on work of publicist and cultural production sectors. The choice of theme is done by the need to understand the relationships. That intertwines in the art market and what media that best reaches in their audiences. Considering the artist-consumer relationship, and the relationship brand-artist and artist-public. And so, the importance of this advice means less explored public relations, for the creation of the brand concept for the artist before his public. Considered in this work as a gallery, art dealer, curator, media and consumers. In this context an analysis is done on diverse views on the market of the arts through specific interview. This interviews was made with professionals working in the cultural sector. And help to understand the communication segments that exist and the current conditions of the market in the context of competitiveness. As was considered the academic education of the public relations professional, it geared to the cultural context, the interviews with professional future. And then was considered that public relations presents itself as a proposal for better communication in the arts. They are concern to create concepts of brand identity-thinking artist and the best means for the artist to be present in this area

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Pós-graduação em Artes - IA

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Os oceanos e as praias têm recebido todo o tipo de fragmentos, que podem ter impactos econômicos, estéticos e ecológicos (USEPA, 1992). Dentre esses fragmentos, estão os pellets ou grânulos plásticos, que são utilizados na indústria para manufatura de diversos produtos (Ogata et al, 2009). Esses grânulos entram no ambiente de forma acidental ou intencional durante o transporte ou produção de plástico (ITF, 1988) e representam um importante constituinte da poluição marinha por resíduos sólidos, estando presentes em todos os oceanos e praias do mundo, com relatos desde a década de 70 (Turra, 2008). Efeitos adversos que podem ocorrer em organismos que ingerem esses grânulos incluem bloqueio do trato intestinal, redução de consumo alimentar e aumento à exposição dos produtos químicos (Endo et al., 2005). Segundo Karapanagioti e Klontza (2008), os grânulos de baixa densidade flutuam na superfície do oceano e chegam nas praias. Sendo orgânicos, os grânulos adsorvem contaminantes hidrofóbicos, como hidrocarbonetos, presentes ao longo percurso até chegar na praia (Mato et al., 2001). Esses compostos estão entre contaminantes que podem afetar o ambiente marinho e podem ser provenientes de vazamentos de óleo e queima incompleta de combustíveis fósseis (NRC, 1985). O objetivo deste trabalho é apresentar resultados desses compostos em grânulos de plástico coletados na superfície do sedimento da Praia do Embaré, Baixada Santista, SP, região muito afetada pela introdução de hidrocarbonetos.

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Programa de Doctorado en Patología Quirúrgica, Reproducción Humana y Factores Psicológicos y el Proceso de Enfermar

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La consideración de un problema, no debe hacerse desde la óptica científica sino hacerlo de manera específica al campo del arte, es decir, " identificar problemas artísticos". Esta consigna no debiera presentar inconvenientes, pero a la hora de hacer evidentes o concientes los problemas plástico-visuales, es decir aislarlos y reconocerlos fuera del "hacer" pareciera presentar dificultades, ya que el artista en formación no suele ejercitarse en este procedimiento. El artista se cuestiona permanentemente, pone en duda y no se conforma fácilmente, y éste es el modo de estudiar su entorno, es su manera de vivir. Desplegar el proceso de producción artística e identificar en su recorrido diferentes tipos de problemas plástico-visuales, ayudará a plantear cierto ordenamiento que permita incluirse dentro de una metodología de investigación. La intención de investigar en artes, especialmente desde la producción, aparece siempre con opiniones controvertidas especialmente fuera del contexto específicamente artístico.