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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
22/12/1999 |
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Data da última atualização: |
03/03/2010 |
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Autoria: |
TANNUS, T. A.; PANEPUCCI, H. C.; POSADAS, D. A.; CRESTANA, S. |
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Afiliação: |
USP-IFSC; Universidade Estadual de Ponta Grossa; EMBRAPA-CNPDIA. |
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Título: |
Dynamic imaging approach for 3-D preferential flow within stratified soil samples. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
In: ENCONTRO NACIONAL DE FISICA DA MATERIA CONDENSADA, 17., jun. 1994, Caxambu, MG. Resumos... Sao Paulo: Sociedade Brasileira de Fisica, 1994. |
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Páginas: |
p.296. |
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Idioma: |
Inglês |
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Conteúdo: |
It describes a new NMR imaging approach to investigate the dynamics of the soil "fingering" phenomenum. To study the "fingering" dynamics a fast experiment was performed to follow only the water front (no image reconstruction), constructed by curves that resembles the wetting profile in vertical slices of a soil sample. A cubic 15x15x15cm3 double-layer sand column simulates the stratified soil. Spin-echo signals with phase encoding along vertical axis (gravitational direction) were acquired, but with phase encoding gradient off, giving 16 acquisitions of 7 transverse slices in a 3 minutes experiment. After suitable treatment, the water front and the horizontal distribution at each measured time of the water infiltration was obtained. Normalizing the signal intensities to the soil column dimensions and using computational graphics resources it was possible to quantify the number of fingers and their spatial and temporal variability. The column was also imaged in a 500 Gauss NMR tomograph under conventional SE methodology. Coronal, transverse and sagittal images of the column were acquired under water steady-state flow providing three-dimensional information regarding the number of fingers, their sizes and diameters, to be compared to the dynamic images. The results to be shown elects this approach of magnetic resonance imaging as a valuable tool for non-invasive study of the dynamics of soil "fingering" and other fast changing phenomena. |
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Palavras-Chave: |
3-D; Dynamic imaging; NMR; Nuclear magnetic resonance; Stratified soil samples; Three-dimensional. |
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Thesaurus Nal: |
preferential flow. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02248naa a2200253 a 4500
001 1027219
005 2010-03-03
008 1994 bl --- 0-- u #d
100 1 $aTANNUS, T. A.
245 $aDynamic imaging approach for 3-D preferential flow within stratified soil samples.
260 $c1994
300 $ap.296.
520 $aIt describes a new NMR imaging approach to investigate the dynamics of the soil "fingering" phenomenum. To study the "fingering" dynamics a fast experiment was performed to follow only the water front (no image reconstruction), constructed by curves that resembles the wetting profile in vertical slices of a soil sample. A cubic 15x15x15cm3 double-layer sand column simulates the stratified soil. Spin-echo signals with phase encoding along vertical axis (gravitational direction) were acquired, but with phase encoding gradient off, giving 16 acquisitions of 7 transverse slices in a 3 minutes experiment. After suitable treatment, the water front and the horizontal distribution at each measured time of the water infiltration was obtained. Normalizing the signal intensities to the soil column dimensions and using computational graphics resources it was possible to quantify the number of fingers and their spatial and temporal variability. The column was also imaged in a 500 Gauss NMR tomograph under conventional SE methodology. Coronal, transverse and sagittal images of the column were acquired under water steady-state flow providing three-dimensional information regarding the number of fingers, their sizes and diameters, to be compared to the dynamic images. The results to be shown elects this approach of magnetic resonance imaging as a valuable tool for non-invasive study of the dynamics of soil "fingering" and other fast changing phenomena.
650 $apreferential flow
653 $a3-D
653 $aDynamic imaging
653 $aNMR
653 $aNuclear magnetic resonance
653 $aStratified soil samples
653 $aThree-dimensional
700 1 $aPANEPUCCI, H. C.
700 1 $aPOSADAS, D. A.
700 1 $aCRESTANA, S.
773 $tIn: ENCONTRO NACIONAL DE FISICA DA MATERIA CONDENSADA, 17., jun. 1994, Caxambu, MG. Resumos... Sao Paulo: Sociedade Brasileira de Fisica, 1994.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
04/03/2016 |
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Data da última atualização: |
04/03/2016 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SILVA, M. V. da; LELES, P. S. dos S.; CHAER, G. M. |
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Afiliação: |
MARCELO VINÍCIUS DA SILVA, UFRRJ; PAULO SERGIO DOS SANTOS LELES, UFRRJ; GUILHERME MONTANDON CHAER, CNPAB. |
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Título: |
Biossólido de lodo de esgoto: fonte alternativa de macro e micronutrientes para espécies da mata atlântica. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: SEMANA CIENTÍFICA JOHANNA DÖBEREINER, 15., 2015, Seropédica. Solo, Ciência e vida: caderno de resumos... Seropédica: Embrapa Agrobiologia, 2015 |
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Idioma: |
Português |
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Palavras-Chave: |
Adubação orgânica; Restauração florestal. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/140676/1/Biossolido-de-lodo-de-esgoto2503-11662-1-PB1.pdf
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Marc: |
LEADER 00615nam a2200145 a 4500
001 2039736
005 2016-03-04
008 2015 bl uuuu u00u1 u #d
100 1 $aSILVA, M. V. da
245 $aBiossólido de lodo de esgoto$bfonte alternativa de macro e micronutrientes para espécies da mata atlântica.$h[electronic resource]
260 $aIn: SEMANA CIENTÍFICA JOHANNA DÖBEREINER, 15., 2015, Seropédica. Solo, Ciência e vida: caderno de resumos... Seropédica: Embrapa Agrobiologia$c2015
653 $aAdubação orgânica
653 $aRestauração florestal
700 1 $aLELES, P. S. dos S.
700 1 $aCHAER, G. M.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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