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| Vivian, Magnos Alan; da Silva Júnior, Francides Gomes. |
| This study aimed to evaluate the effects of anthraquinone addition in the cooking curve, with different loads of reagents, through the kraft pulping process, of Eucalyptus grandis x Eucalyptus urophylla wood, to infer about the process parameters. The wood was transformed into chips and classified to conduct the kraft cooking curves. The applied loads were from 10% to 24% of active alkali, with an anthraquinone charge of 0.05% (on dry wood). We evaluated raw and screened yield, reject content, kappa number (delignification level) and residual active alkali. We observed that the addition of anthraquinone did not affect the process raw yield, but increased the screened yield by reducing reject content, especially for low loads of active alkali (10% and 12%).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pulping; Cooking additive; Wood pulp Recursos Florestal; Celulose e Papel Fabricação de pasta celulósica; Aditivo de cozimento; Polpa de madeira. |
| Ano: 2017 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1267 |
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| Morais, Weslley Wilker Corrêa; Susin, Felipe; Vivian, Magnos Alan; Araújo, Maristela Machado. |
| Aiming to evaluate the development of seedlings of Schinus terebinthifolius under different irrigation depth, an experiment was installed in a greenhouse. The experimental design used was randomized block consisting of 4 treatments with 3 blocks. The irrigation depths evaluated were 8, 10, 12 and 14 mm daily, respectively T1, T2, T3 and T4. Seedling production was performed in tubes with 280 cm ³ filled with pine bark basis substrate and fertilizer. The development of the seedlings, were evaluated by the following characteristics: height of aerial part (APA), diameter at breast height (D),dried mass weight of roots (PMSR), dried mass weight of aerial part (PMSPA), total dried mass (MST) and relation (h/d). The treatment T3 presented the best results in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aroeira vermelha; Water depth; Morphologic features Aroeira vermelha; Lâmina d’água; Características morfológicas. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/313 |
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| Vivian, Magnos Alan; Santini, Elio José; Modes, Karina Soares; Carvalho, Douglas Edson; Morais, Weslley Wilker Corrêa; Souza, Joel Telles de; Susin, Felipe. |
| O presente estudo objetivou avaliar o uso da constante elástica dinâmica obtida no ensaio não destrutivo, como parâmetro para estimativa das propriedades mecânicas de rigidez e resistência da madeira de Eucalyptus grandis. Para isto, utilizou-se um emissor de ondas ultrassônicas, o qual teve sua sensibilidade avaliada através da comparação com os valores obtidos no ensaio destrutivo de flexão estática. Os resultados evidenciam que a constante elástica dinâmica pode ser utilizada para inferência não destrutiva da rigidez e resistência da madeira de Eucalyptus grandis, entretanto com ressalvas, pois os ajustes observados foram relativamente baixos, com R²aj. de 0,25 e 0,39, respectivamente. doi: 10.4336/2012.pfb.32.69.109 |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ensaio não destrutivo; Módulo de elasticidade; Módulo de ruptura Non-destructive testing; Modulus of elasticity; Modulus of rupture. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/272 |
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