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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Pantanal. |
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Data corrente: |
05/05/1997 |
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Data da última atualização: |
05/05/1997 |
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Autoria: |
CHUDNOFF, M.; MALDONADO, E. D.; GOYTIA, E. |
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Título: |
Solar drying of tropical hardwoods. |
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Ano de publicação: |
1966 |
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Fonte/Imprenta: |
Rio Piedras: Institute of Tropical Forestry, 1966. |
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Páginas: |
26p |
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Série: |
(Research Paper, 2). |
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Idioma: |
Inglês |
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Conteúdo: |
The lumber solar dryer is a wood-framed structure covered with thin transparent materials that permit transmission of shortwave solar energy. Baffled fans provide air circulation. Air exchange is regulated using adjustable vents and mist sprayers permit some additional control of relative humidity. At Rio Piedras-San Juan, temperature, relative humidity, and solar radiation are fairly uniform throughout the year, being slightly more favorable for rapid lumber drying during february-march. Solar and air drying time of seven charges of Honduras mahogany of varying thicknesses and one mixed charge of 11 hardwood species has been determined. From an initial green moisture content of 50 percent, l-inch mahogany can be solar dried to a final moisture content of 12 percent in 18 days, 1-1/4-inch requires 25 days, and 2-inch stock about 41 days. The mixed hardwoods (1-1/4-inch), ranging in basic specific gravity from 0.48 to 0.82 required 43 days to solar-dry from an average green moisture content of 60 percent to a final average moisture content of 12 percent. At the end of the runs, moisture content of sample boards usually ranged +- 2 percent from this mean. A 48-hour mist spray conditioning treatment is adequate to remove severe casehardening. A moisture content of 15 percent can be reached in the solar dryer in one-half to one-fourth the time required for air drying. Nevertheless, warping and checking in the solar-dried lumber are no more severe than in matched air-dried material. MenosThe lumber solar dryer is a wood-framed structure covered with thin transparent materials that permit transmission of shortwave solar energy. Baffled fans provide air circulation. Air exchange is regulated using adjustable vents and mist sprayers permit some additional control of relative humidity. At Rio Piedras-San Juan, temperature, relative humidity, and solar radiation are fairly uniform throughout the year, being slightly more favorable for rapid lumber drying during february-march. Solar and air drying time of seven charges of Honduras mahogany of varying thicknesses and one mixed charge of 11 hardwood species has been determined. From an initial green moisture content of 50 percent, l-inch mahogany can be solar dried to a final moisture content of 12 percent in 18 days, 1-1/4-inch requires 25 days, and 2-inch stock about 41 days. The mixed hardwoods (1-1/4-inch), ranging in basic specific gravity from 0.48 to 0.82 required 43 days to solar-dry from an average green moisture content of 60 percent to a final average moisture content of 12 percent. At the end of the runs, moisture content of sample boards usually ranged +- 2 percent from this mean. A 48-hour mist spray conditioning treatment is adequate to remove severe casehardening. A moisture content of 15 percent can be reached in the solar dryer in one-half to one-fourth the time required for air drying. Nevertheless, warping and checking in the solar-dried lumber are no more severe than in matched air-dried materi... Mostrar Tudo |
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Palavras-Chave: |
Secadora solar. |
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Thesagro: |
Madeira; Secagem. |
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Thesaurus Nal: |
hardwood; solar drying. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02038nam a2200217 a 4500
001 1560892
005 1997-05-05
008 1966 bl uuuu u0uu1 u #d
100 1 $aCHUDNOFF, M.
245 $aSolar drying of tropical hardwoods.
260 $aRio Piedras: Institute of Tropical Forestry$c1966
300 $a26p
490 $a(Research Paper, 2).
520 $aThe lumber solar dryer is a wood-framed structure covered with thin transparent materials that permit transmission of shortwave solar energy. Baffled fans provide air circulation. Air exchange is regulated using adjustable vents and mist sprayers permit some additional control of relative humidity. At Rio Piedras-San Juan, temperature, relative humidity, and solar radiation are fairly uniform throughout the year, being slightly more favorable for rapid lumber drying during february-march. Solar and air drying time of seven charges of Honduras mahogany of varying thicknesses and one mixed charge of 11 hardwood species has been determined. From an initial green moisture content of 50 percent, l-inch mahogany can be solar dried to a final moisture content of 12 percent in 18 days, 1-1/4-inch requires 25 days, and 2-inch stock about 41 days. The mixed hardwoods (1-1/4-inch), ranging in basic specific gravity from 0.48 to 0.82 required 43 days to solar-dry from an average green moisture content of 60 percent to a final average moisture content of 12 percent. At the end of the runs, moisture content of sample boards usually ranged +- 2 percent from this mean. A 48-hour mist spray conditioning treatment is adequate to remove severe casehardening. A moisture content of 15 percent can be reached in the solar dryer in one-half to one-fourth the time required for air drying. Nevertheless, warping and checking in the solar-dried lumber are no more severe than in matched air-dried material.
650 $ahardwood
650 $asolar drying
650 $aMadeira
650 $aSecagem
653 $aSecadora solar
700 1 $aMALDONADO, E. D.
700 1 $aGOYTIA, E.
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 12 | |
| 1. |  | CARDOSO, A. P.; NUNES, C. C.; ALVES, S. A. M. Eficiência de diferentes produtos no tratamento de ferimentos de colheita em macieiras Fuji para controle do cancro europeu das pomáceas. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA, 15., 2017.; ENCONTRO DE PÓS-GRADUANDOS DA EMBRAPA UVA E VINHO, 11., 2017, Bento Gonçalves. Resumos...Bento Gonçalves, RS: Embrapa Uva e Vinho, 2017. p. 42.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| 8. | | ROGÉRIO, F.; BARONCELLI, R.; CUEVAS-FERNÁNDEZ, F. B.; BECERRA, S.; CROUCH, J.; BETTIOL, W.; AZCÁRATE-PERIL, M. A.; MALAPI-WIGHT, M.; ORTEGA, V.; BETRAN, J.; TENUTA, A.; DAMBOLENA, J. S.; ESKER, P. D.; REVILLA, P.; JACKSON-ZIEMS; HILTBRUNNER, J.; MUNKVOLD, G.; BUHINICEK, I.; VICENTE-VILLARDÓN, J. L.''''; SUKNO, S. A.; THON, M. R. Population genomics provide insights into the global genetic structure of Colletotrichum graminicola, the causal agent of maize anthracnose. MBio, v. 14, n. 1, e0287822, 2022.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 10. | | SILVEIRA, E. S.; SANTOS, M. F.; CARROMEU, C.; JANK, L.; BARRIOS, S. C. L.; VALLE, C. B. do; SIMEÃO, R. M. Utilização de drone com diferentes Ground Sample Distance para obtenção de dados fenotípicos de forrageiras. In: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 15., 2019, Campo Grande, MS. [Resumos dos trabalhos...]. Brasília, DF: Embrapa, 2019 80 p. (Embrapa Gado de Corte. Documentos, 264). Comitê Organizador: Marlene de Barros Coelho; Lenita Ramires dos Santos; Rodrigo Carvalho Alva; Lucimara Chiari; Thais Basso Amaral. 30-31| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 12 | |
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