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Registro Completo |
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Biblioteca(s): |
Embrapa Café. |
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Data corrente: |
11/12/2023 |
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Data da última atualização: |
11/12/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ANDRADE, E. T. de; REZENDE, R. P.; BORÉM, F. M.; ROSA, S. D. V. F. da; OLIVEIRA, F. da S. de; RIOS, P. A. |
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Afiliação: |
EDNILTON TAVARES DE ANDRADE, UNIVERSIDADE FEDERAL DE LAVRAS; RENAN PEREIRA REZENDE, UNIVERSIDADE FEDERAL DE LAVRAS; FLÁVIO MEIRA BORÉM, UNIVERSIDADE FEDERAL DE LAVRAS; STTELA DELLYZETE VEIGA F DA ROSA, CNPCa; FILIPE DA SILVA DE OLIVEIRA, UNIVERSIDADE FEDERAL DE LAVRAS; PAULA ALMEIDA RIOS, UNIVERSIDADE FEDERAL DE LAVRAS. |
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Título: |
Numerical simulation of the temperature distribution of coffee stored in cooled and natural environments. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Ciência e Natura, v. 45, e12, 2023. |
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Páginas: |
28 p. |
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DOI: |
https://doi.org/10.5902/2179460X74111 |
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Idioma: |
Inglês |
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Conteúdo: |
The storage of agricultural products is of great importance in maintaining product quality between harvest and commercialization. The use of numerical and computational techniques, such as the finite element method (FEM) and computational fluid dynamics (CFD), allows the analysis and simulation of systems that involve heat transfer, as is the case of grain storage. A computational model based on these techniques that satisfactorily represents a real system was used to test and to analyze decision alternatives without the need for real experimentation. In this study, we sought to study the behavior of the temperature of a mass of stored mocha coffee beans by using computational techniques, as requested by the private sector. The coffee was stored for 6 months in two types of environments: a cooled environment between 15 and 18 °C by using an air temperature control equipment used for artificial cooling and a natural environment. A computational model was developed to simulate the heat transfer process for both types of storage. In the comparison of the temperature distribution during storage from simulation results and for experimental results, an overall mean relative error of 2.34% was obtained for coffee stored in a natural environment, and that of 5.74% was obtained for coffee stored in a cooled environment. |
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Thesaurus Nal: |
Coffee beans; Cold storage; Drying temperature; Stored grain; Temperature. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1159455/1/Numerical-simulation-temperature.pdf
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Marc: |
LEADER 02120naa a2200265 a 4500
001 2159455
005 2023-12-11
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.5902/2179460X74111$2DOI
100 1 $aANDRADE, E. T. de
245 $aNumerical simulation of the temperature distribution of coffee stored in cooled and natural environments.$h[electronic resource]
260 $c2023
300 $a28 p.
520 $aThe storage of agricultural products is of great importance in maintaining product quality between harvest and commercialization. The use of numerical and computational techniques, such as the finite element method (FEM) and computational fluid dynamics (CFD), allows the analysis and simulation of systems that involve heat transfer, as is the case of grain storage. A computational model based on these techniques that satisfactorily represents a real system was used to test and to analyze decision alternatives without the need for real experimentation. In this study, we sought to study the behavior of the temperature of a mass of stored mocha coffee beans by using computational techniques, as requested by the private sector. The coffee was stored for 6 months in two types of environments: a cooled environment between 15 and 18 °C by using an air temperature control equipment used for artificial cooling and a natural environment. A computational model was developed to simulate the heat transfer process for both types of storage. In the comparison of the temperature distribution during storage from simulation results and for experimental results, an overall mean relative error of 2.34% was obtained for coffee stored in a natural environment, and that of 5.74% was obtained for coffee stored in a cooled environment.
650 $aCoffee beans
650 $aCold storage
650 $aDrying temperature
650 $aStored grain
650 $aTemperature
700 1 $aREZENDE, R. P.
700 1 $aBORÉM, F. M.
700 1 $aROSA, S. D. V. F. da
700 1 $aOLIVEIRA, F. da S. de
700 1 $aRIOS, P. A.
773 $tCiência e Natura$gv. 45, e12, 2023.
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Registro original: |
Embrapa Café (CNPCa) |
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Biblioteca |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
13/03/2015 |
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Data da última atualização: |
13/03/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
MARQUES, M. de A.; QUINTELA, E. D.; MASCARIN, G. M.; FERNANDES, P. M.; ARTHURS, S. P. |
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Afiliação: |
MIRIAM DE ALMEIDA MARQUES, UFG; ELIANE DIAS QUINTELA, CNPAF; GABRIEL MOURA MASCARIN, CNPAF; PAULO MARÇAL FERNANDES, UFG; STEVEN PAUL ARTHURS, UNIVERSITY OF FLORIDA, Apopka. |
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Título: |
Management of Bemisia tabaci biotype B with botanical and mineral oils. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Crop Protection, v. 66, p. 127-132, Dec. 2014. |
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ISSN: |
0261-2194 |
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DOI: |
10.1016/j.cropro.2014.09.006 |
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Idioma: |
Inglês |
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Conteúdo: |
While the toxic effects of neem, Azadirachta indica A. Juss, on Bemisia tabaci Genn. are well documented, few studies have evaluated other oils. We compared neem, sesame, citrus, castor, vegetable and mineral oils (1% v/v) to a chemical standard thiamethoxam (0.17 g A.I./L) against B. tabaci biotype B life stages on dry bean plants Phaseolus vulgaris L. under screenhouse conditions. Oils and thiamethoxam exhibited low ovicidal activity (<10% egg mortality). However, significant mortality occurred due to the residual activity to 1st instars that emerged from treated eggs. Overall, impacts of egg treatments were greatest for thiamethoxam (77% total mortality for eggs and 1st instars) compared with oils which were statistically similar (22e29% mortality). Larvicidal effect of oils (against 2nd instars) was greater than ovicidal effects. Highest nymphal mortality (>81%) was achieved with castor, sesame, citrus and neem oils, which was significantly greater than for thiamethoxam (65% mortality). Adult whiteflies were exposed to fresh and aged spray residues, rather than being sprayed directly. In this case, comparatively lower efficacy was achieved from oil treatments compared with thiamethoxam. While some mortality was observed from fresh residues of slow drying oils (up to 41% for castor oil), no significant control from any oil residues >3 days old was observed in our tests. The different route of exposure against adults likely reduced the effectiveness of oil treatments which act directly on the cuticle. In trials with viruliferous adult whiteflies exposed to fresh residues, none of the tested products completely prevented transmission of bean golden mosaic virus (BGMV). However, we noted reduced virus severity ratings from plants pre-treated with castor and citrus oil. We conclude that castor, sesame, citrus and neem oils have the potential to be used in whitefly management programs. MenosWhile the toxic effects of neem, Azadirachta indica A. Juss, on Bemisia tabaci Genn. are well documented, few studies have evaluated other oils. We compared neem, sesame, citrus, castor, vegetable and mineral oils (1% v/v) to a chemical standard thiamethoxam (0.17 g A.I./L) against B. tabaci biotype B life stages on dry bean plants Phaseolus vulgaris L. under screenhouse conditions. Oils and thiamethoxam exhibited low ovicidal activity (<10% egg mortality). However, significant mortality occurred due to the residual activity to 1st instars that emerged from treated eggs. Overall, impacts of egg treatments were greatest for thiamethoxam (77% total mortality for eggs and 1st instars) compared with oils which were statistically similar (22e29% mortality). Larvicidal effect of oils (against 2nd instars) was greater than ovicidal effects. Highest nymphal mortality (>81%) was achieved with castor, sesame, citrus and neem oils, which was significantly greater than for thiamethoxam (65% mortality). Adult whiteflies were exposed to fresh and aged spray residues, rather than being sprayed directly. In this case, comparatively lower efficacy was achieved from oil treatments compared with thiamethoxam. While some mortality was observed from fresh residues of slow drying oils (up to 41% for castor oil), no significant control from any oil residues >3 days old was observed in our tests. The different route of exposure against adults likely reduced the effectiveness of oil treatments which... Mostrar Tudo |
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Palavras-Chave: |
Bemisa tabaci. |
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Thesagro: |
Controle biológico; Feijão; Mosca branca; Phaseolus vulgaris. |
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Thesaurus NAL: |
Bean golden mosaic virus; Biopesticides; Horticultural oils; Insect control; Thiamethoxam. |
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Categoria do assunto: |
O Insetos e Entomologia |
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Marc: |
LEADER 02814naa a2200313 a 4500
001 2011363
005 2015-03-13
008 2014 bl uuuu u00u1 u #d
022 $a0261-2194
024 7 $a10.1016/j.cropro.2014.09.006$2DOI
100 1 $aMARQUES, M. de A.
245 $aManagement of Bemisia tabaci biotype B with botanical and mineral oils.$h[electronic resource]
260 $c2014
520 $aWhile the toxic effects of neem, Azadirachta indica A. Juss, on Bemisia tabaci Genn. are well documented, few studies have evaluated other oils. We compared neem, sesame, citrus, castor, vegetable and mineral oils (1% v/v) to a chemical standard thiamethoxam (0.17 g A.I./L) against B. tabaci biotype B life stages on dry bean plants Phaseolus vulgaris L. under screenhouse conditions. Oils and thiamethoxam exhibited low ovicidal activity (<10% egg mortality). However, significant mortality occurred due to the residual activity to 1st instars that emerged from treated eggs. Overall, impacts of egg treatments were greatest for thiamethoxam (77% total mortality for eggs and 1st instars) compared with oils which were statistically similar (22e29% mortality). Larvicidal effect of oils (against 2nd instars) was greater than ovicidal effects. Highest nymphal mortality (>81%) was achieved with castor, sesame, citrus and neem oils, which was significantly greater than for thiamethoxam (65% mortality). Adult whiteflies were exposed to fresh and aged spray residues, rather than being sprayed directly. In this case, comparatively lower efficacy was achieved from oil treatments compared with thiamethoxam. While some mortality was observed from fresh residues of slow drying oils (up to 41% for castor oil), no significant control from any oil residues >3 days old was observed in our tests. The different route of exposure against adults likely reduced the effectiveness of oil treatments which act directly on the cuticle. In trials with viruliferous adult whiteflies exposed to fresh residues, none of the tested products completely prevented transmission of bean golden mosaic virus (BGMV). However, we noted reduced virus severity ratings from plants pre-treated with castor and citrus oil. We conclude that castor, sesame, citrus and neem oils have the potential to be used in whitefly management programs.
650 $aBean golden mosaic virus
650 $aBiopesticides
650 $aHorticultural oils
650 $aInsect control
650 $aThiamethoxam
650 $aControle biológico
650 $aFeijão
650 $aMosca branca
650 $aPhaseolus vulgaris
653 $aBemisa tabaci
700 1 $aQUINTELA, E. D.
700 1 $aMASCARIN, G. M.
700 1 $aFERNANDES, P. M.
700 1 $aARTHURS, S. P.
773 $tCrop Protection$gv. 66, p. 127-132, Dec. 2014.
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Embrapa Arroz e Feijão (CNPAF) |
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