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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
12/08/2022 |
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Data da última atualização: |
15/08/2022 |
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Autoria: |
TEIXEIRA, D. E.; ALMEIDA, J. G. de; ALMEIDA, S. A. de O.; BAIA, M. J. F.; ROCHA, J. G.; LOPES, L. F.; MELO, C. K. A. de. |
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Afiliação: |
DIVINO ETERNO TEIXEIRA, Serviço Florestal Brasileiro; JAIME GONÇALVES DE ALMEIDA, Universidade de Brasília; SERGIO ALBERTO DE OLIVEIRA ALMEIDA, Serviço Florestal Brasileiro; MAÍRLA JULIA FREITAS BAIA, Universidade de Brasília; JOYCE GONÇALVES ROCHA, Universidade de Brasília; LAÍS FERREIRA LOPES, Universidade de Brasília; CRISTHIAN KELVIN AMARO DE MELO, Universidade de Brasília. |
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Título: |
Piso laminado de bambu-MDF com tratamento termomecânico. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Pesquisa Florestal Brasileira, v. 42, e202002091, p. 1-9, 2022. |
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Idioma: |
Português |
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Conteúdo: |
Resumo: Os pisos com revestimento de madeira são produtos engenheirados, geralmente produzidos com lâminas coladas sobre chapa de compensado ou painéis de madeira reconstituída, os quais possuem larga aceitação no mercado brasileiro. Neste trabalho, objetivou-se desenvolver um piso composto de bambu e MDF, com uso de tratamento termomecânico, e determinar as suas propriedades físicas e mecânicas em comparação com um piso laminado comercial. As amostras de piso bambu-MDF produzidas foram divididas em: uma parte submetida a pós-tratamento termomecânico (temperatura de 160 oC e pressão de 1 MPa por 15 min) e outra sem tratamento. Os resultados mostraram que o bambu pode ser associado ao MDF para produção de pisos. O piso de bambu-MDF é igual ou superior ao piso comercial em quase todas as propriedades estudadas, exceto na resistência à umidade, como observado pelos testes de absorção e inchamento. O piso de bambu-MDF é superior ao comercial nos principais requisitos de dureza Janka e resistência à abrasão. Abstract: The wood-coated floors are engineered products, usually produced with veneers glued over plywood or reconstituted wood panels, which have wide acceptance in the Brazilian market. In this work the objective was to develop a floor composed of bamboo and MDF, with the use of thermo-mechanical treatment, as well as to determine the physical and mechanical properties when compared to commercial laminate flooring. The produced bamboo-MDF floors samples were divided in one part subjected to thermo-mechanical post-treatment (temperature of 160 oC and pressure of 1 MPa for 15 min) and the other without treatment. The results showed that bamboo can be combined with MDF for flooring production. The experimental bamboo-MDF floor was similar or superior to the commercial laminate floor in almost all the studied properties, except resistance to humidity, as shown by the results of absorption and swelling tests. The bamboo-MDF floor was superior to the commercial product in the main requirements of Janka hardness and abrasion resistance. MenosResumo: Os pisos com revestimento de madeira são produtos engenheirados, geralmente produzidos com lâminas coladas sobre chapa de compensado ou painéis de madeira reconstituída, os quais possuem larga aceitação no mercado brasileiro. Neste trabalho, objetivou-se desenvolver um piso composto de bambu e MDF, com uso de tratamento termomecânico, e determinar as suas propriedades físicas e mecânicas em comparação com um piso laminado comercial. As amostras de piso bambu-MDF produzidas foram divididas em: uma parte submetida a pós-tratamento termomecânico (temperatura de 160 oC e pressão de 1 MPa por 15 min) e outra sem tratamento. Os resultados mostraram que o bambu pode ser associado ao MDF para produção de pisos. O piso de bambu-MDF é igual ou superior ao piso comercial em quase todas as propriedades estudadas, exceto na resistência à umidade, como observado pelos testes de absorção e inchamento. O piso de bambu-MDF é superior ao comercial nos principais requisitos de dureza Janka e resistência à abrasão. Abstract: The wood-coated floors are engineered products, usually produced with veneers glued over plywood or reconstituted wood panels, which have wide acceptance in the Brazilian market. In this work the objective was to develop a floor composed of bamboo and MDF, with the use of thermo-mechanical treatment, as well as to determine the physical and mechanical properties when compared to commercial laminate flooring. The produced bamboo-MDF floors samples were divided in one... Mostrar Tudo |
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Palavras-Chave: |
Dureza; Engineered flooring; Piso engenheirado; Resistance to abrasion; Resistência à abrasão. |
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Thesaurus Nal: |
Hardness. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/238426/1/EmbrapaFlorestas-PFB-2022-PisoLaminadoBambuMDF.pdf
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Marc: |
LEADER 02853naa a2200265 a 4500
001 2145401
005 2022-08-15
008 2022 bl uuuu u00u1 u #d
100 1 $aTEIXEIRA, D. E.
245 $aPiso laminado de bambu-MDF com tratamento termomecânico.$h[electronic resource]
260 $c2022
520 $aResumo: Os pisos com revestimento de madeira são produtos engenheirados, geralmente produzidos com lâminas coladas sobre chapa de compensado ou painéis de madeira reconstituída, os quais possuem larga aceitação no mercado brasileiro. Neste trabalho, objetivou-se desenvolver um piso composto de bambu e MDF, com uso de tratamento termomecânico, e determinar as suas propriedades físicas e mecânicas em comparação com um piso laminado comercial. As amostras de piso bambu-MDF produzidas foram divididas em: uma parte submetida a pós-tratamento termomecânico (temperatura de 160 oC e pressão de 1 MPa por 15 min) e outra sem tratamento. Os resultados mostraram que o bambu pode ser associado ao MDF para produção de pisos. O piso de bambu-MDF é igual ou superior ao piso comercial em quase todas as propriedades estudadas, exceto na resistência à umidade, como observado pelos testes de absorção e inchamento. O piso de bambu-MDF é superior ao comercial nos principais requisitos de dureza Janka e resistência à abrasão. Abstract: The wood-coated floors are engineered products, usually produced with veneers glued over plywood or reconstituted wood panels, which have wide acceptance in the Brazilian market. In this work the objective was to develop a floor composed of bamboo and MDF, with the use of thermo-mechanical treatment, as well as to determine the physical and mechanical properties when compared to commercial laminate flooring. The produced bamboo-MDF floors samples were divided in one part subjected to thermo-mechanical post-treatment (temperature of 160 oC and pressure of 1 MPa for 15 min) and the other without treatment. The results showed that bamboo can be combined with MDF for flooring production. The experimental bamboo-MDF floor was similar or superior to the commercial laminate floor in almost all the studied properties, except resistance to humidity, as shown by the results of absorption and swelling tests. The bamboo-MDF floor was superior to the commercial product in the main requirements of Janka hardness and abrasion resistance.
650 $aHardness
653 $aDureza
653 $aEngineered flooring
653 $aPiso engenheirado
653 $aResistance to abrasion
653 $aResistência à abrasão
700 1 $aALMEIDA, J. G. de
700 1 $aALMEIDA, S. A. de O.
700 1 $aBAIA, M. J. F.
700 1 $aROCHA, J. G.
700 1 $aLOPES, L. F.
700 1 $aMELO, C. K. A. de
773 $tPesquisa Florestal Brasileira$gv. 42, e202002091, p. 1-9, 2022.
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Registro original: |
Embrapa Florestas (CNPF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
19/11/2018 |
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Data da última atualização: |
22/02/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
LAMMEL, D. R.; BARTH, G.; OVASKAINEN, O.; CRUZ, L. M.; ZANATTA, J. A.; RYO, M.; SOUZA, E. M. de; PEDROSA, F. O. |
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Afiliação: |
Daniel R. Lammel, UFPR; Gabriel Barth, ABC Research Foundation; Otso Ovaskainen, University of Helsinki; Leonardo M. Cruz, UFPR; JOSILEIA ACORDI ZANATTA, CNPF; Masahiro Ryo, 3Freie Universität Berlin and Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB); Emanuel M. de Souza, UFPR; Fábio O. Pedrosa, UFPR. |
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Título: |
Direct and indirect effects of a pH gradient bring insights into the mechanisms driving prokaryotic community structures. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Microbiome, v. 6, article 106, June 2018. 13 p. |
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DOI: |
10.1186/s40168-018-0482-8 |
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Idioma: |
Inglês |
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Conteúdo: |
Background: pH is frequently reported as the main driver for prokaryotic community structure in soils. However, pH changes are also linked to ?spillover effects? on other chemical parameters (e.g., availability of Al, Fe, Mn, Zn, and Cu) and plant growth, but these indirect effects on the microbial communities are rarely investigated. Usually, pH also co-varies with some confounding factors, such as land use, soil management (e.g., tillage and chemical inputs), plant cover, and/or edapho-climatic conditions. So, a more comprehensive analysis of the direct and indirect effects of pH brings a better understanding of the mechanisms driving prokaryotic (archaeal and bacterial) community structures. Results: We evaluated an agricultural soil pH gradient (from 4 to 6, the typical range for tropical farms), in a liming gradient with confounding factors minimized, investigating relationships between prokaryotic communities (16S rRNA) and physical?chemical parameters (indirect effects). Correlations, hierarchical modeling of species communities (HMSC), and random forest (RF) modeling indicated that both direct and indirect effects of the pH gradient affected the prokaryotic communities. Some OTUs were more affected by the pH changes (e.g., some Actinobacteria), while others were more affected by the indirect pH effects (e.g., some Proteobacteria). HMSC detected a phylogenetic signal related to the effects. Both HMSC and RF indicated that the main indirect effect was the pH changes on the availability of some elements (e.g., Al, Fe, and Cu), and secondarily, effects on plant growth and nutrient cycling also affected the OTUs. Additionally, we found that some of the OTUs that responded to pH also correlated with CO2, CH4, and N2O greenhouse gas fluxes. Conclusions: Our results indicate that there are two distinct pH-related mechanisms driving prokaryotic community structures, the direct effect and ?spillover effects? of pH (indirect effects). Moreover, the indirect effects are highly relevant for some OTUs and consequently for the community structure; therefore, it is a mechanism that should be further investigated in microbial ecology. MenosBackground: pH is frequently reported as the main driver for prokaryotic community structure in soils. However, pH changes are also linked to ?spillover effects? on other chemical parameters (e.g., availability of Al, Fe, Mn, Zn, and Cu) and plant growth, but these indirect effects on the microbial communities are rarely investigated. Usually, pH also co-varies with some confounding factors, such as land use, soil management (e.g., tillage and chemical inputs), plant cover, and/or edapho-climatic conditions. So, a more comprehensive analysis of the direct and indirect effects of pH brings a better understanding of the mechanisms driving prokaryotic (archaeal and bacterial) community structures. Results: We evaluated an agricultural soil pH gradient (from 4 to 6, the typical range for tropical farms), in a liming gradient with confounding factors minimized, investigating relationships between prokaryotic communities (16S rRNA) and physical?chemical parameters (indirect effects). Correlations, hierarchical modeling of species communities (HMSC), and random forest (RF) modeling indicated that both direct and indirect effects of the pH gradient affected the prokaryotic communities. Some OTUs were more affected by the pH changes (e.g., some Actinobacteria), while others were more affected by the indirect pH effects (e.g., some Proteobacteria). HMSC detected a phylogenetic signal related to the effects. Both HMSC and RF indicated that the main indirect effect was the pH changes on... Mostrar Tudo |
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Palavras-Chave: |
16S rRNA; Ecologia microbiana; Illumina sequencing; Solo sub tropical; Sub-tropical soil. |
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Thesagro: |
Bactéria; Ph; Química do Solo. |
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Thesaurus NAL: |
Archaea; Microbial ecology; Soil chemistry. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/186279/1/2018-Josi-Microbiome-Direct.pdf
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Marc: |
LEADER 03160naa a2200349 a 4500
001 2099575
005 2019-02-22
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1186/s40168-018-0482-8$2DOI
100 1 $aLAMMEL, D. R.
245 $aDirect and indirect effects of a pH gradient bring insights into the mechanisms driving prokaryotic community structures.$h[electronic resource]
260 $c2018
520 $aBackground: pH is frequently reported as the main driver for prokaryotic community structure in soils. However, pH changes are also linked to ?spillover effects? on other chemical parameters (e.g., availability of Al, Fe, Mn, Zn, and Cu) and plant growth, but these indirect effects on the microbial communities are rarely investigated. Usually, pH also co-varies with some confounding factors, such as land use, soil management (e.g., tillage and chemical inputs), plant cover, and/or edapho-climatic conditions. So, a more comprehensive analysis of the direct and indirect effects of pH brings a better understanding of the mechanisms driving prokaryotic (archaeal and bacterial) community structures. Results: We evaluated an agricultural soil pH gradient (from 4 to 6, the typical range for tropical farms), in a liming gradient with confounding factors minimized, investigating relationships between prokaryotic communities (16S rRNA) and physical?chemical parameters (indirect effects). Correlations, hierarchical modeling of species communities (HMSC), and random forest (RF) modeling indicated that both direct and indirect effects of the pH gradient affected the prokaryotic communities. Some OTUs were more affected by the pH changes (e.g., some Actinobacteria), while others were more affected by the indirect pH effects (e.g., some Proteobacteria). HMSC detected a phylogenetic signal related to the effects. Both HMSC and RF indicated that the main indirect effect was the pH changes on the availability of some elements (e.g., Al, Fe, and Cu), and secondarily, effects on plant growth and nutrient cycling also affected the OTUs. Additionally, we found that some of the OTUs that responded to pH also correlated with CO2, CH4, and N2O greenhouse gas fluxes. Conclusions: Our results indicate that there are two distinct pH-related mechanisms driving prokaryotic community structures, the direct effect and ?spillover effects? of pH (indirect effects). Moreover, the indirect effects are highly relevant for some OTUs and consequently for the community structure; therefore, it is a mechanism that should be further investigated in microbial ecology.
650 $aArchaea
650 $aMicrobial ecology
650 $aSoil chemistry
650 $aBactéria
650 $aPh
650 $aQuímica do Solo
653 $a16S rRNA
653 $aEcologia microbiana
653 $aIllumina sequencing
653 $aSolo sub tropical
653 $aSub-tropical soil
700 1 $aBARTH, G.
700 1 $aOVASKAINEN, O.
700 1 $aCRUZ, L. M.
700 1 $aZANATTA, J. A.
700 1 $aRYO, M.
700 1 $aSOUZA, E. M. de
700 1 $aPEDROSA, F. O.
773 $tMicrobiome$gv. 6, article 106, June 2018. 13 p.
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