Cellulose And Paper
Mostrando 25-36 de 171 artigos, teses e dissertações.
-
25. Caracterização cromatográfica de compostos orgânicos presentes nos resíduos sólidos provenientes de indústria de reciclagem de papel e sua aplicação na produção de briquetes de carvão vegetal
Recycling of paper in industrial scale has become an established practice worldwide. In this work, organic compositions of three different kinds of sludge generated in recycle paper industry were studied, and the incorporation of one of those sludge in briket was also investigated. The characterization of organic compounds in sludge samples and briket was pe
Química Nova. Publicado em: 2011-09
-
26. Simulation of variations in the composition of samples in the evaluation of neutral detergent fiber contents by using cellulose standard in filter bags made from different textiles
The objective of this study was to evaluate the efficiency of using nylon textiles (50 μm), F57 (Ankom®) and non-woven textile (NWT - 100 g/m²) on laboratory evaluation of neutral detergent fiber (NDF) by using quantitative filter paper as purified cellulose standard and by simulating different composition of samples with additions of corn starch, pectin,
Revista Brasileira de Zootecnia. Publicado em: 2011-07
-
27. Desenvolvimento de dispositivos eletroquímicos descartáveis para análises rápidas / Development of disposable electrochemical devices for rapid analysis
This paper presents the efforts to the construction and characterization of electrochemical transducers on polyester and paper, and also demonstrates the use of these disposable electrochemical cells in the development of a biosensor for rapid analysis of salicylate in blood as well as the creation of a separation device associated electrochemical detection
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/08/2010
-
28. Análise dos fatores determinantes da internacionalização e desempenho financeiro das empresas brasileiras de capital aberto: a contribuição da visão baseada em recursos (RBV)
Brazil has a significant number of enterprises in all business segments such as: car-industry, market share, consumer goods, electric-electronics, energy, construction, digital industry, mining, paper and cellulose, farming, chemistry, petrochemistry, fabric industry, transport and so on. As we know, all of these companies are inserted into the capital marke
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/06/2010
-
29. Compostagem pelo método de aeração passiva: uma solução sustentável para os resíduos sólidos orgânicos da indústria de celulose e papel / Composting a sustainable solution for the organic waste from pulp and paper industry: method of passive aeration
O presente trabalho, na área das Ciências Ambientais, estudou a compostagem de resíduos sólidos provenientes da indústria de celulose e papel. Partindo-se da hipótese que a compostagem é resultado da ação de microorganismos e a aeração é um dos fatores principais para o desenvolvimento de suas atividades, o objetivo deste trabalho foi verificar q
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2010
-
30. Seed lipases: sources, applications and properties - a review
This paper provides an overview regarding the main aspects of seed lipases, such as the reactions catalyzed, physiological functions, specificities, sources and applications. Lipases are ubiquitous in nature and are produced by several plants, animals and microorganisms. These enzymes exhibit several very interesting features, such as low cost and easy purif
Brazilian Journal of Chemical Engineering. Publicado em: 2010-03
-
31. Uma investigação do nível de sustentabilidade das companhias de papel e celulose e a influência das informações financeiras sobre a qualidade da divulgação socioambiental / An investigation of the level of sustainability in companies on cellulose and paper segment and the influence of financial information on quality of environmental and social disclosure
The concept of sustainability has been discussed worldwide and increasingly influenced by the decisions of the market in different countries. Nations, governments, corporations, managers and citizens have had their positions and questions under the expanded views of economic, social and environmental. The spread of a "green" generation has affected not only
Publicado em: 2010
-
32. Microstructure and mechanical properties of gypsum composites reinforced with recycled cellulose pulp
The use of waste fibers for the reinforcement of brittle matrices is considered opportune for the sustainable management of urban solid residues. This paper examines the microstructure and mechanical properties of a composite material made of gypsum reinforced with cellulose fibers from discarded Kraft cement bag. Two different kinds of gypsum were used, nat
Publicado em: 2010
-
33. Avaliação do potencial da casca de Eucalyptus spp. para a produção de bioetanol / Evaluation of the potential use of Eucalyptus spp. bark for bioethanol production
The use of no fossil source for biofuels production has been stimuled in the all world. Proposing a new global scenario related to the energy matrix, together with the environmental conditions, there is the need to search alternative renewable raw materials. In this context, Brazil presents special conditions, considering the lignocellulosic residues from th
Publicado em: 2010
-
34. Um estudo da comunicação institucional de empresas brasileiras envolvidas na produção de livros, jornais e revistas, sobre estratégias de sustentabilidade / A study about the institutional communication of Brazilian enterprises involved with the production of books, newspapers and magazines concerning strategies of sustainability.
O estudo analisa aspectos da comunicação institucional em sites e produtos de empresas brasileiras envolvidas na produção de livros, jornais e revistas, quanto a estratégias de sustentabilidade eventualmente existentes na cadeia de produção desses impressos, desde a fabricação do papel até a operação das gráficas, sobretudo no âmbito dos impact
Publicado em: 2010
-
35. Desenvolvimento e caracterização de sensores quimicamente modificados para análise de sulfeto / Development and characterization of chemically modified sensors for analysis of sulfide
The developmental impulse of the present time has caused a continuous degradation of the environment, which increases the need of monitoring the contaminant levels launched in the natural water courses and industrial effluents. In this context, it is crucial to develop new methodologies of determination and quantification of various types of pollutants, with
Publicado em: 2010
-
36. Screening and enzymatic study of a composite microbial system FH3
Five strains of fungi and 18 strains of bacteria were isolated from the soil and horse manure with cellulose as the sole carbon source. Among them, two fungal, F9 and F13, and two bacterial, B16 and B21, showed the highest filter paper activities, which were 7.79 U g-1, 9.84 U g-1, 7.34 U g-1 and 9.68 U g-1, respectively. Four microbial systems, designed as
Brazilian Archives of Biology and Technology. Publicado em: 2009-02