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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
29/04/2022 |
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Data da última atualização: |
29/04/2022 |
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Autoria: |
SILVA, C. E. S. da; XAVIER, C. N.; JUNQUEIRA, A. A.; NEVES JUNIOR, O. de F.; CARVALHO, P. C. L. de; TORRES, A. C.; CARVALHO, A. M. de. |
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Título: |
Investigating the generation of wood wastes from mechanical processing of two forest species. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Pesquisa Florestal Brasileira, Colombo, v. 42, e202002138, 2022. |
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Páginas: |
p. 1-8. |
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ISSN: |
1983-2605 |
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DOI: |
http://doi.org/10.4336/2022.pfb.42e202002138 |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT. The circular saw is a tool commonly used for wood processing. It may be presented at different models. Considering their specificities, they can generate different amount of waste. The objective of this study was to evaluate the generation of waste from Tectona grandis L. f. and Pinus caribaea var. hondurensis, processed with two saws of the multiple type (48 and 36 teeth) and one of the universal type (28 teeth). The cutting process followed in grain direction into ninety samples, 15 for each species and saw, until the sample was completely processed. The processing time was measured and the waste was collected in each operation. ANOVA and test of multiple comparison of averages were applied. The influence of the teeth number and type of saw on the amount of waste generated was verified. The universal saw was the one that generated the highest amount of waste. It reached up to 116% more than the multiple saw, that generated the lowest amount of waste (36 teeth). P. caribaea var. hondurensis generated 7% more waste and presented shorter processing time (22%), when compared to T. grandis. TÍTULO. Investigando a geração de resíduos do processamento mecânico da madeira de duas espécies florestais RESUMO. Aserra circular é uma ferramenta comumente empregada para o processamento de madeira, sendo apresentada em diversos modelos e, por suas especificidades, podem interferir na quantidade de resíduos gerados. O objetivo deste estudo foi avaliar a geração de resíduos de Tectona grandis L. f. e Pinus caribaea var. hondurensis, processadas com duas serras do tipo múltipla (48 e 36 dentes) e uma do tipo universal (28 dentes). Foram efetuados cortes a favor da grã em noventa corpos de prova, 15 para cada espécie e serra, até o processamento completo da amostra. Foi medido o tempo de processamento e coletado o resíduo em cada operação. A ANOVA e o teste de comparação múltipla de médias foram aplicados. Constatou-se a influência do número de dentes e do tipo de serra na quantidade de resíduos gerados. A serra do tipo universal foi a que gerou maior quantidade média de resíduos, resultando em 116% a mais em comparação com a serra múltipla que gerou menor volume de resíduos (36 dentes). P. caribaea var. hondurensis gerou 7% mais resíduos e menor tempo de processamento (22%), quando comparado a T. grandis. MenosABSTRACT. The circular saw is a tool commonly used for wood processing. It may be presented at different models. Considering their specificities, they can generate different amount of waste. The objective of this study was to evaluate the generation of waste from Tectona grandis L. f. and Pinus caribaea var. hondurensis, processed with two saws of the multiple type (48 and 36 teeth) and one of the universal type (28 teeth). The cutting process followed in grain direction into ninety samples, 15 for each species and saw, until the sample was completely processed. The processing time was measured and the waste was collected in each operation. ANOVA and test of multiple comparison of averages were applied. The influence of the teeth number and type of saw on the amount of waste generated was verified. The universal saw was the one that generated the highest amount of waste. It reached up to 116% more than the multiple saw, that generated the lowest amount of waste (36 teeth). P. caribaea var. hondurensis generated 7% more waste and presented shorter processing time (22%), when compared to T. grandis. TÍTULO. Investigando a geração de resíduos do processamento mecânico da madeira de duas espécies florestais RESUMO. Aserra circular é uma ferramenta comumente empregada para o processamento de madeira, sendo apresentada em diversos modelos e, por suas especificidades, podem interferir na quantidade de resíduos gerados. O objetivo deste estudo foi avaliar a geração de resíduos de Te... Mostrar Tudo |
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Palavras-Chave: |
Plant production. |
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Thesagro: |
Produção Vegetal; Produto Florestal; Serraria. |
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Thesaurus Nal: |
Forest products; Sawmills. |
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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/doc/1142509/1/EmbrapaFlorestas-PFB-2022-InvestigatingtheGenerationOfWood.pdf
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Marc: |
LEADER 03286naa a2200301 a 4500
001 2142509
005 2022-04-29
008 2022 bl uuuu u00u1 u #d
022 $a1983-2605
024 7 $ahttp://doi.org/10.4336/2022.pfb.42e202002138$2DOI
100 1 $aSILVA, C. E. S. da
245 $aInvestigating the generation of wood wastes from mechanical processing of two forest species.$h[electronic resource]
260 $c2022
300 $ap. 1-8.
520 $aABSTRACT. The circular saw is a tool commonly used for wood processing. It may be presented at different models. Considering their specificities, they can generate different amount of waste. The objective of this study was to evaluate the generation of waste from Tectona grandis L. f. and Pinus caribaea var. hondurensis, processed with two saws of the multiple type (48 and 36 teeth) and one of the universal type (28 teeth). The cutting process followed in grain direction into ninety samples, 15 for each species and saw, until the sample was completely processed. The processing time was measured and the waste was collected in each operation. ANOVA and test of multiple comparison of averages were applied. The influence of the teeth number and type of saw on the amount of waste generated was verified. The universal saw was the one that generated the highest amount of waste. It reached up to 116% more than the multiple saw, that generated the lowest amount of waste (36 teeth). P. caribaea var. hondurensis generated 7% more waste and presented shorter processing time (22%), when compared to T. grandis. TÍTULO. Investigando a geração de resíduos do processamento mecânico da madeira de duas espécies florestais RESUMO. Aserra circular é uma ferramenta comumente empregada para o processamento de madeira, sendo apresentada em diversos modelos e, por suas especificidades, podem interferir na quantidade de resíduos gerados. O objetivo deste estudo foi avaliar a geração de resíduos de Tectona grandis L. f. e Pinus caribaea var. hondurensis, processadas com duas serras do tipo múltipla (48 e 36 dentes) e uma do tipo universal (28 dentes). Foram efetuados cortes a favor da grã em noventa corpos de prova, 15 para cada espécie e serra, até o processamento completo da amostra. Foi medido o tempo de processamento e coletado o resíduo em cada operação. A ANOVA e o teste de comparação múltipla de médias foram aplicados. Constatou-se a influência do número de dentes e do tipo de serra na quantidade de resíduos gerados. A serra do tipo universal foi a que gerou maior quantidade média de resíduos, resultando em 116% a mais em comparação com a serra múltipla que gerou menor volume de resíduos (36 dentes). P. caribaea var. hondurensis gerou 7% mais resíduos e menor tempo de processamento (22%), quando comparado a T. grandis.
650 $aForest products
650 $aSawmills
650 $aProdução Vegetal
650 $aProduto Florestal
650 $aSerraria
653 $aPlant production
700 1 $aXAVIER, C. N.
700 1 $aJUNQUEIRA, A. A.
700 1 $aNEVES JUNIOR, O. de F.
700 1 $aCARVALHO, P. C. L. de
700 1 $aTORRES, A. C.
700 1 $aCARVALHO, A. M. de
773 $tPesquisa Florestal Brasileira, Colombo$gv. 42, e202002138, 2022.
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Registro original: |
Embrapa Florestas (CNPF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
21/08/2023 |
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Data da última atualização: |
21/08/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
PERES, L. G. S.; MALAFATTI, J. O. D.; BERNARDI, B.; MATTOSO, L. H. C.; PARIS, E. C. |
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Afiliação: |
UNIVERSIDADE FEDERAL DE SÃO CARLOS; National Nanotechnology Laboratory for Agriculture; UNIVERSIDADE FEDERAL DE SÃO CARLOS; LUIZ HENRIQUE CAPPARELLI MATTOSO, CNPDIA; ELAINE CRISTINA PARIS, CNPDIA. |
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Título: |
Biodegradable Starch Sachets Reinforced with Montmorillonite for Packing ZnO Nanoparticles: Solubility and Zn2+ Ions Release. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Journal of Polymers and the Environment, v. 31, 2023. |
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Páginas: |
2388 - 2398 |
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DOI: |
https://doi.org/10.1007/s10924-023-02769-2 |
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Idioma: |
Inglês |
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Conteúdo: |
Agriculture?s importance in human lives and the economy has directed studies to improve crop production. An essential challenge for improving fertilizer efficacy is reducing losses due to leaching and increasing nutrient supplies. In this context, biodegradable sachets stand out as internal packaging instead of direct insertion into the polymer matrix, facilitating the system processing and making it easier to adapt the soil?s nutritional quantity. Thus, the present work aimed to increase the zinc oxide (ZnO) solubility by obtaining nanoparticles using top-down and bottom-up approaches and packaging them in montmorillonite (MMT) reinforced starch sachets. The different diameters and forms of the ZnO nanoparticles were evaluated to understand the solubility dependence on these parameters. In this way, the top-down process for the attritor milling method allowed the nanoparticles with about 71 nm average diameter and greater homogeneity than the commercial one (approximately 174 nm). The milled ZnO nanoparticles presented better solubility than those synthesized bottom-up processes and the commercial ones, reaching a 90 to 100% solubility plateau in 48 h. Concerning starch sachets, the 1% MMT (w w−1 ) insertion in the polymeric matrix promoted increased water vapor barrier and mechanical properties, improving tensile strength. In the solubility test for nanoparticulate ZnO packed in sachets, similar behaviors improved properties from the MMT reinforcement insertion showed as an alternative source of Zn2+ ions to minimize losses during application. MenosAgriculture?s importance in human lives and the economy has directed studies to improve crop production. An essential challenge for improving fertilizer efficacy is reducing losses due to leaching and increasing nutrient supplies. In this context, biodegradable sachets stand out as internal packaging instead of direct insertion into the polymer matrix, facilitating the system processing and making it easier to adapt the soil?s nutritional quantity. Thus, the present work aimed to increase the zinc oxide (ZnO) solubility by obtaining nanoparticles using top-down and bottom-up approaches and packaging them in montmorillonite (MMT) reinforced starch sachets. The different diameters and forms of the ZnO nanoparticles were evaluated to understand the solubility dependence on these parameters. In this way, the top-down process for the attritor milling method allowed the nanoparticles with about 71 nm average diameter and greater homogeneity than the commercial one (approximately 174 nm). The milled ZnO nanoparticles presented better solubility than those synthesized bottom-up processes and the commercial ones, reaching a 90 to 100% solubility plateau in 48 h. Concerning starch sachets, the 1% MMT (w w−1 ) insertion in the polymeric matrix promoted increased water vapor barrier and mechanical properties, improving tensile strength. In the solubility test for nanoparticulate ZnO packed in sachets, similar behaviors improved properties from the MMT reinforcement insertion showe... Mostrar Tudo |
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Palavras-Chave: |
Composite; Fertilizer; Sachets. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02301naa a2200229 a 4500
001 2156029
005 2023-08-21
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s10924-023-02769-2$2DOI
100 1 $aPERES, L. G. S.
245 $aBiodegradable Starch Sachets Reinforced with Montmorillonite for Packing ZnO Nanoparticles$bSolubility and Zn2+ Ions Release.$h[electronic resource]
260 $c2023
300 $a2388 - 2398
520 $aAgriculture?s importance in human lives and the economy has directed studies to improve crop production. An essential challenge for improving fertilizer efficacy is reducing losses due to leaching and increasing nutrient supplies. In this context, biodegradable sachets stand out as internal packaging instead of direct insertion into the polymer matrix, facilitating the system processing and making it easier to adapt the soil?s nutritional quantity. Thus, the present work aimed to increase the zinc oxide (ZnO) solubility by obtaining nanoparticles using top-down and bottom-up approaches and packaging them in montmorillonite (MMT) reinforced starch sachets. The different diameters and forms of the ZnO nanoparticles were evaluated to understand the solubility dependence on these parameters. In this way, the top-down process for the attritor milling method allowed the nanoparticles with about 71 nm average diameter and greater homogeneity than the commercial one (approximately 174 nm). The milled ZnO nanoparticles presented better solubility than those synthesized bottom-up processes and the commercial ones, reaching a 90 to 100% solubility plateau in 48 h. Concerning starch sachets, the 1% MMT (w w−1 ) insertion in the polymeric matrix promoted increased water vapor barrier and mechanical properties, improving tensile strength. In the solubility test for nanoparticulate ZnO packed in sachets, similar behaviors improved properties from the MMT reinforcement insertion showed as an alternative source of Zn2+ ions to minimize losses during application.
653 $aComposite
653 $aFertilizer
653 $aSachets
700 1 $aMALAFATTI, J. O. D.
700 1 $aBERNARDI, B.
700 1 $aMATTOSO, L. H. C.
700 1 $aPARIS, E. C.
773 $tJournal of Polymers and the Environment$gv. 31, 2023.
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Embrapa Instrumentação (CNPDIA) |
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