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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: |
09/03/2010 |
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Autoria: |
CRESTANA, S.; MASCARENHAS, S.; CESAREO, R.; CRUVINEL, P. E. |
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Afiliação: |
EMBRAPA-CNPDIA; Universita di Roma "La Sapienza", Centro D'Ingigneria Biomedica. |
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Título: |
Soil research opportunities using X- and gamma-ray computer tomography miniscanner techniques. |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE AND WORKSHOP ON THE VALIDATION OF FLOW AND TRANSPORT MODELS FOR THE UNSATURATED ZONE, May 1988, Ruidoso, Novo Mexico. Proceedings... Ruidoso: College of Agriculture and Home Economics, 1988. |
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Páginas: |
p.14. |
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Idioma: |
Inglês |
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Notas: |
Resumo. |
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Conteúdo: |
The ideal technique for monitoring bulk density, water content and other physical parameters in soil should be nondestructive, sensitive, rapid and able to resolve small differences in the measured parameters over distances of a few millimeters. However, currently available methods such as gravimetry, gamma-ray absorption-scattering, neutron-probe techniques and others do not take into account soil inhomogeneities and do not evaluate tri-dimensional profiles of bulk density, water content and soil water movement. The technique of computer-assisted tomography (CAT) has been successfully used as a new method for physical studies of soil water. Using a third generation CAT we performed several scans and tomographies of soil samples. We demonstrated the appropriateness of CAT to dynamic (real-time) studies of water motion in soil including measuring mater velocities as high as 1.6 mm/s. Information on heterogeneities of bulk density, water content and related 3-D information as well as simultaneous spatial and time distributions was obtained using the appropriate CAT techniques. Some semi-quantitative images of soil compaction, simulation of drip irrigation and seed germination, growth, and water uptake by roots in a column of soil was also performed. Two limitations of the CAT technique are the complexity and high cost of the medical CAT scanners. It was possible to design, build, and use in our laboratory an inexpensive CAT miniscanner dedicated to soil science research. |
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Palavras-Chave: |
Agricultural instrumentation; Ciência do solo; Gamma-ray; Instrumentação agropecuária; Metodologia; Minitomógrafo; Minitomograph; X-ray. |
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Thesagro: |
Raio Gama; Raio X. |
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Thesaurus Nal: |
methodology; soil science. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02536naa a2200325 a 4500
001 1026561
005 2010-03-09
008 1988 bl --- 0-- u #d
100 1 $aCRESTANA, S.
245 $aSoil research opportunities using X- and gamma-ray computer tomography miniscanner techniques.
260 $c1988
300 $ap.14.
500 $aResumo.
520 $aThe ideal technique for monitoring bulk density, water content and other physical parameters in soil should be nondestructive, sensitive, rapid and able to resolve small differences in the measured parameters over distances of a few millimeters. However, currently available methods such as gravimetry, gamma-ray absorption-scattering, neutron-probe techniques and others do not take into account soil inhomogeneities and do not evaluate tri-dimensional profiles of bulk density, water content and soil water movement. The technique of computer-assisted tomography (CAT) has been successfully used as a new method for physical studies of soil water. Using a third generation CAT we performed several scans and tomographies of soil samples. We demonstrated the appropriateness of CAT to dynamic (real-time) studies of water motion in soil including measuring mater velocities as high as 1.6 mm/s. Information on heterogeneities of bulk density, water content and related 3-D information as well as simultaneous spatial and time distributions was obtained using the appropriate CAT techniques. Some semi-quantitative images of soil compaction, simulation of drip irrigation and seed germination, growth, and water uptake by roots in a column of soil was also performed. Two limitations of the CAT technique are the complexity and high cost of the medical CAT scanners. It was possible to design, build, and use in our laboratory an inexpensive CAT miniscanner dedicated to soil science research.
650 $amethodology
650 $asoil science
650 $aRaio Gama
650 $aRaio X
653 $aAgricultural instrumentation
653 $aCiência do solo
653 $aGamma-ray
653 $aInstrumentação agropecuária
653 $aMetodologia
653 $aMinitomógrafo
653 $aMinitomograph
653 $aX-ray
700 1 $aMASCARENHAS, S.
700 1 $aCESAREO, R.
700 1 $aCRUVINEL, P. E.
773 $tIn: INTERNATIONAL CONFERENCE AND WORKSHOP ON THE VALIDATION OF FLOW AND TRANSPORT MODELS FOR THE UNSATURATED ZONE, May 1988, Ruidoso, Novo Mexico. Proceedings... Ruidoso: College of Agriculture and Home Economics, 1988.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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| Registros recuperados : 26 | |
| 3. |  | CRESTANA, S.; MASCARENHAS, S.; CESAREO, R. Minitomografo para aplicacoes em ciencia do solo: algumas caracteristicas. In: REUNIAO ANUAL DA SBPC, 38., 1986, Curitiba, PR. Ciencia e Cultura, Sao Paulo, v.38, n.7, p.431, jul. 1986. Suplemento. Resumos. ref.31-D.1.10.| Biblioteca(s): Embrapa Instrumentação. |
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| 4. | | CRESTANA, S.; MASCARENHAS, S.; CESAREO, R. Medida do coeficiente de atenuação linear K como função de energia da radiação incidente (x ou gama) no caso de um LVA, de Barretos-SP com diferentes conteúdos de água. In: REUNIÃO ANUAL DA SBPC, 37., 1985, Belo Horizonte, MG. Ciência e Cultura, Sao Paulo, v.37, n.7, p.358-359, jul. 1985. Suplemento. Resumos. ref.03-D.1.12.| Biblioteca(s): Embrapa Instrumentação. |
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| 6. | | CRESTANA, S.; MASCARENHAS, S.; CESAREO, R. O uso de um minitomografo para aplicacoes em ciencia do solo. In: REUNIAO ANUAL DA SBPC, 38., 1986, Curitiba, PR. Ciencia e Cultura, Sao Paulo, v.38, n.7, p.9, jul. 1986. Suplemento. Resumos. ref.14-A.1.| Biblioteca(s): Embrapa Instrumentação. |
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| 9. | | CRESTANA, S.; MASCARENHAS, S.; CRUVINEL, P. E.; CESAREO, R. Estudos de germinação e crescimento de uma planta utilizando um minitomógrafo de raios gama. In: REUNIÃO ANUAL DA SBPC, 39., 1987, Brasília, DF. Ciência e Cultura, São Paulo, v.39, n.7, p.337, jul. 1987. Suplemento. Resumos. ref.03-D.1.12.| Biblioteca(s): Embrapa Instrumentação. |
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| 17. | | CRESTANA, S.; VAZ, C. M. P.; MASCARENHAS, S.; CRUVINEL, P. E.; CESAREO, R. Estudos preliminares da broca da cana da açúcar através do uso da tomografia computadorizada. In: ESCUELA LATINOAMERICANA DE FÍSICA DE SUELOS, 1., jan.-fev. 1988, São Carlos, SP. Anais... São Carlos: EMBRAPA-UAPDIA, 1988. Paginacao irregular. Ref.I ELAFS/88-24A.| Biblioteca(s): Embrapa Instrumentação. |
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| 18. | | CRESTANA, S.; CESAREO, R.; MASCARENHAS, S.; CRUVINEL, P. E.; NIELSEN, D. R. Gamma- and X-ray tomographic studies in soil research. In: CROP SCIENCE SOCIETY OF AMERICA AND SOIL SCIENCE SOCIETY OF AMERICA ANNUAL MEETING, 80., 1988, Anaheim, CA, Estados Unidos. Agronomy abstracts... Anaheim: American Society of Agronomy, 1988. p.181.| Biblioteca(s): Embrapa Instrumentação. |
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| 19. | | CRESTANA, S.; CRUVINEL, P. E.; VAZ, C. M. P.; CESAREO, R.; MASCARENHAS, S.; REICHARDT, K. Calibração e uso de um tomógrafo computadorizado em ciência do solo. Revista Brasileira de Ciencia do Solo, Campinas, v.16, n.2, p.161-167, maio/ago. 1992.| Biblioteca(s): Embrapa Instrumentação. |
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| 20. | | CRESTANA, S.; MASCARENHAS, S.; CESAREO, R.; POZZI-MUCELLI, R.; CRUVINEL, P. E.; VAZ, C. M. P. Other results from computerized tomography with possibilities of applications in the study of the soil-plant-air continuum. In: ESCUELA LATINOAMERICANA DE FISICA DE SUELOS, 1., jan.-fev. 1988, São Carlos, SP. Anais... São Carlos: EMBRAPA-UAPDIA, 1988. Paginacao irregular. Ref.I ELAFS/88/24.| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 26 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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