Pulp And Paper
Mostrando 25-36 de 159 artigos, teses e dissertações.
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25. Influence of Mn2+ ion in reverse cationic flotation of iron ore
This paper presents the study results of Mn2+ ion influence on reverse cationic flotation of iron ore at pH 10.5. A small influence was observed on all response variables evaluated: mass recovery, Fe metallurgical recovery, grade of Fe and SiO2 in obtained concentrates for dosages of MnCl2 from 600 g/ton. The conditioning of pulp with ethylene diamine tetraa
Rem: Rev. Esc. Minas. Publicado em: 2015-09
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26. Eucalyptus urograndis stem proteome is responsive to short-term cold stress
Eucalyptus urograndis is a hybrid eucalyptus of major economic importance to the Brazilian pulp and paper industry. Although widely used in forest nurseries around the country, little is known about the biochemical changes imposed by environmental stress in this species. In this study, we evaluated the changes in the stem proteome after short-term stimulatio
Genet. Mol. Biol.. Publicado em: 2015-06
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27. INFLUÊNCIA DO CONTEÚDO DE XILANAS NA BRANQUEABILIDADE, PROPRIEDADES HIGROSCÓPICAS, FISICO-MECÂNICAS E ÓPTICA DE POLPAS BRANQUEADAS DE EUCALIPTO
Bleached eucalypt kraft pulps are widely used in print and writing (P&W) and tissue paper manufacture. Among the quality requirements of pulp for these papers, xylan content has been controversial. The objective of this study was to evaluate the influence of xylan content on bleachability, hygroscopic, physic-mechanical and optical properties of the pulp. In
Quím. Nova. Publicado em: 2015-02
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28. Molecular characterization of a Xylanase-producing fungus isolated from fouled soil
Xylanase (EC 3. 2. 1. 8), hydrolyzes xylo-oligosaccharides into D-xylose and required for complete hydrolysis of native cellulose and biomass conversion. It has broad range of applications in the pulp and paper, pharmaceutical and Agri-food industries. Fifty fungal species were isolated from the fouled soil around an oil refinery and screened for the product
Braz. J. Microbiol.. Publicado em: 2014-12
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29. Influence of different cultivars on oil quality and chemical characteristics of avocado fruit
The objective of this paper was to determine the chemical composition of the avocado fruit of cultivars Fortuna, Collinson, and Barker and to carry out a detailed analysis of the fatty acid composition of the pulp, seed, and peel oils. The saturated fatty acid (SFA) of the pulp oils accounted for around 22.3, 29.4, and 41.3% of the total fatty acids in the F
Food Sci. Technol. Publicado em: 2014-09
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30. Imobilização e caracterização de lacase e seu uso na biodegradação de efluentes de indústrias papeleiras
Laccase from Aspergillus sp was immobilized on glutaraldehyde-activated chitosan beads. A comparative study between free and immobilized laccase was conducted and the potential of the resulting immobilized derivative in the biodegradation of pulp and paper mill effluent was evaluated. The immobilized laccase is more resistant to various denaturing conditions
Quím. Nova. Publicado em: 2014-04
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31. Up-gradation of MoO3 and separation of copper, iron, zinc from roasted molybdenum ore by a leaching process
The present research paper deals with the oxidation process of molybdenum ore. The main target of the present study is the up-gradation of MoO3 from roasted molybdenum ore by a leaching process without waste generation. The most important application of hydrometallurgical processing is the leaching process of the ore and it is the primary process to make pur
Braz. J. Chem. Eng.. Publicado em: 2013-06
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32. Apexification with white MTA in an immature permanent tooth with dens invaginatus
Dens invaginatus, also known as "dens in dente", is a developmental dental anomaly resulting in an invagination of the enamel organ into the dental papilla. These cases present technical difficulties to the root canal treatment. Apexification using an apical plug of mineral trioxide aggregate (MTA) has been indicated as an alternative to long-term intracanal
Braz. J. Oral Sci.. Publicado em: 2013-03
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33. Application of dissolved air flotation like post-treatment of effluent from activated sludge in a pulp and paper industry / Aplicação da flotação por ar dissolvido como pós-tratamento de efluente de lodo ativado em uma indústria de papel e celulose
O objetivo principal deste trabalho foi avaliar o desempenho da flotação por ar dissolvido no pós-tratamento de efluentes de lodo ativado em uma indústria de papel e celulose. Os testes variando dosagem de coagulante e polímero (polímero aniônico e polímero catiônico) foram realizados em escala de laboratório, com o uso do equipamento flotateste. E
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2012
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34. EficiÃncia energÃtica e intensidade de emissÃes no setor de papel e celulose brasileiro / Energy efficiency and emissions intensity in the Brazilian pulp and paper sector
A eficiÃncia energÃtica industrial vem recebendo crescente atenÃÃo em diversos paÃses por sua importÃncia na busca por seguranÃa de suprimento energÃtico, aumento de competitividade na economia e mitigaÃÃo das emissÃes de gases de efeito estufa. Esta dissertaÃÃo teve por objetivo avaliar o desenvolvimento do consumo energÃtico da indÃstria de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2012
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35. Comparativo entre processos florestais terceirizados e primarizados / Comparison between outsourced and primarized forest processes
The Outsourcing and the Primarization constitute management strategies been used by Brazilians forest companies. However, although its use is increasing, technical, economics and strategy terms are not being studied in Brazil, mainly on the forestry sector. Therefore, the principal goal on this research was to compare Outsourcing and Primarization Models inc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012
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36. PROPRIEDADES FÍSICAS E MECÂNICAS DE PAPÉIS RECICLADOS UTILIZADOS PARA FABRICAÇÃO DE TUBETES
RESUMO O presente trabalho objetivou estudar, através de ensaios laboratoriais, as propriedades físicas e mecânicas de papéis reciclados utilizados para produção de tubetes. Para tanto se utilizou seis tipos de papéis com gramatura média de 400 g/m² e para os ensaios de laboratório seguiu-se os procedimentos da Technical Association of Pulp and Pap
Ciênc. Florest.. Publicado em: 2012-06