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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
14/04/1999 |
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Data da última atualização: |
11/06/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ANDRADE, C. de L. T. de; WELLS, R. D.; ALLEN, R. G. |
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Afiliação: |
CAMILO DE LELIS TEIXEIRA DE ANDRADE, CNPMS. |
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Título: |
SPRINKMOD - pressure and discharge simulation model for pressurized irrigation systems. 2. Case study. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Irrigation Science, New York, v. 18, p. 149-156, 1999. |
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Idioma: |
Inglês |
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Conteúdo: |
A computer model, SPRINKMOD, was tested with field data collected from a complex sprinkler irrigation system in operation. The original data collected were adjusted in order to calibrate the model for the irrigation system. Five modifications were made in the original data so that the model sensitivity could be evaluated. The model predicted the system operating point with less than 1% error, after some adjustments in the data. The relative mean standard error was 4.1% for the upstream pressure heads and 2.1% for the downstream pressure heads of all laterals analyzed together. Measurement of pressure and discharge at pump stations along with a reasonable estimate of leakage appears to be essentials for simulation of old systems. Adjustments made to pipe wall thickness and pipe roughness were not as important as the adjustments made to the lateral valves closure in getting SPRINKMOD to simulate pressure heads that were close to the measured values. For long laterals, like center pivot laterals, a variable local loss coefficient for flow past a riser outlet worked better than a fixed value of 0,3. |
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Palavras-Chave: |
Avaliacao; Calibracao; Evaluation; Leakage; Model; Modelo; Simulation; Sprinker; Vazamento. |
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Thesagro: |
Aspersão; Irrigação; Simulação. |
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Thesaurus Nal: |
calibration; irrigation. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 01947naa a2200313 a 4500
001 1482096
005 2018-06-11
008 1999 bl uuuu u00u1 u #d
100 1 $aANDRADE, C. de L. T. de
245 $aSPRINKMOD - pressure and discharge simulation model for pressurized irrigation systems. 2. Case study.$h[electronic resource]
260 $c1999
520 $aA computer model, SPRINKMOD, was tested with field data collected from a complex sprinkler irrigation system in operation. The original data collected were adjusted in order to calibrate the model for the irrigation system. Five modifications were made in the original data so that the model sensitivity could be evaluated. The model predicted the system operating point with less than 1% error, after some adjustments in the data. The relative mean standard error was 4.1% for the upstream pressure heads and 2.1% for the downstream pressure heads of all laterals analyzed together. Measurement of pressure and discharge at pump stations along with a reasonable estimate of leakage appears to be essentials for simulation of old systems. Adjustments made to pipe wall thickness and pipe roughness were not as important as the adjustments made to the lateral valves closure in getting SPRINKMOD to simulate pressure heads that were close to the measured values. For long laterals, like center pivot laterals, a variable local loss coefficient for flow past a riser outlet worked better than a fixed value of 0,3.
650 $acalibration
650 $airrigation
650 $aAspersão
650 $aIrrigação
650 $aSimulação
653 $aAvaliacao
653 $aCalibracao
653 $aEvaluation
653 $aLeakage
653 $aModel
653 $aModelo
653 $aSimulation
653 $aSprinker
653 $aVazamento
700 1 $aWELLS, R. D.
700 1 $aALLEN, R. G.
773 $tIrrigation Science, New York$gv. 18, p. 149-156, 1999.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Tipo/Formato |
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Cutter |
Registro |
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Status |
URL |
Voltar
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| Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
12/11/2020 |
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Data da última atualização: |
21/12/2021 |
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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: |
SILVEIRA, S. S.; SANT'ANNA-SANTOS, B. F.; DEGENHARDT, J.; QUOIRIN, M. |
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Afiliação: |
Sheila Susy Silveira, UFPR; Bruno Francisco Sant'Anna-Santos, UFPR; JULIANA DEGENHARDT, CNPF; Marguerite Quoirin, UFPR. |
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Título: |
Somatic embryogenesis from mature split seeds of jaboticaba (Plinia peruviana (Poir) Govaerts). |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Acta Scientiarum. Agronomy, v. 42, e43798, 2020 11 p. |
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DOI: |
10.4025/actasciagron.v42i1.43798 |
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Idioma: |
Inglês |
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Conteúdo: |
Plinia peruviana is a species that is native to Brazil and is important due to the taste and medicinal properties of its fruits. Young leaves and split mature seeds were used as explants to initiate somatic embryogenesis to obtain a large number of plants in a short period of time. Leaf discs were cultured in MS medium containing various concentrations of 2,4-D (2,4-dichlorophenoxyacetic acid) or picloram (4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid). In the case of the mature seeds, various concentrations of glutamine, 2,4-D and a combination of auxin and BAP (6-benzylaminopurine) were tested for somatic embryogenesis induction. For somatic embryo maturation, several concentrations of PEG 6000 (polyethylene glycol; up to 90 g L-1) were tested. After 60 days of culture using leaf discs, callus formation occurred in all treatments, with the highest averages obtained with 10 μM 2,4-D. However, these calluses did not form somatic embryos. For the cultured seeds, the best treatment was the MS medium with 1,000 mg L-1 glutamine and 10 μM 2,4-D without BAP. The supplementation of 60 g L-1 PEG 6000 was sufficient to promote the maturation of the somatic embryos. Histological analyses of the calluses that were formed from leaf discs showed nonembryogenic characteristics. In contrast, the calluses that originated from mature seeds had small and round cells with little vacuolation, which are characteristics of embryogenic structures. |
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Palavras-Chave: |
Análise histológica; Dichlorophenoxyacetic acid; Discos foliares; Histological analysis; Leaf discs; Massa pró-embriogênica; Mature seeds; Plinia peruviana; Proembryogenic masses; Semente madura. |
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Thesagro: |
Jabuticaba. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02390naa a2200301 a 4500
001 2126530
005 2021-12-21
008 2020 bl uuuu u00u1 u #d
024 7 $a10.4025/actasciagron.v42i1.43798$2DOI
100 1 $aSILVEIRA, S. S.
245 $aSomatic embryogenesis from mature split seeds of jaboticaba (Plinia peruviana (Poir) Govaerts).$h[electronic resource]
260 $c2020
520 $aPlinia peruviana is a species that is native to Brazil and is important due to the taste and medicinal properties of its fruits. Young leaves and split mature seeds were used as explants to initiate somatic embryogenesis to obtain a large number of plants in a short period of time. Leaf discs were cultured in MS medium containing various concentrations of 2,4-D (2,4-dichlorophenoxyacetic acid) or picloram (4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid). In the case of the mature seeds, various concentrations of glutamine, 2,4-D and a combination of auxin and BAP (6-benzylaminopurine) were tested for somatic embryogenesis induction. For somatic embryo maturation, several concentrations of PEG 6000 (polyethylene glycol; up to 90 g L-1) were tested. After 60 days of culture using leaf discs, callus formation occurred in all treatments, with the highest averages obtained with 10 μM 2,4-D. However, these calluses did not form somatic embryos. For the cultured seeds, the best treatment was the MS medium with 1,000 mg L-1 glutamine and 10 μM 2,4-D without BAP. The supplementation of 60 g L-1 PEG 6000 was sufficient to promote the maturation of the somatic embryos. Histological analyses of the calluses that were formed from leaf discs showed nonembryogenic characteristics. In contrast, the calluses that originated from mature seeds had small and round cells with little vacuolation, which are characteristics of embryogenic structures.
650 $aJabuticaba
653 $aAnálise histológica
653 $aDichlorophenoxyacetic acid
653 $aDiscos foliares
653 $aHistological analysis
653 $aLeaf discs
653 $aMassa pró-embriogênica
653 $aMature seeds
653 $aPlinia peruviana
653 $aProembryogenic masses
653 $aSemente madura
700 1 $aSANT'ANNA-SANTOS, B. F.
700 1 $aDEGENHARDT, J.
700 1 $aQUOIRIN, M.
773 $tActa Scientiarum. Agronomy$gv. 42, e43798, 2020 11 p.
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