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Registro Completo |
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
10/09/1996 |
Data da última atualização: |
26/12/2016 |
Autoria: |
QUEIROGA, C. L.; FERRACINI, V. L.; MARSAIOLI, A. J. |
Afiliação: |
CARMEN L. QUEIROGA, UNICAMP; VERA LUCIA FERRACINI, CNPMA; A. J. MARSAIOLI. |
Título: |
Three new oxygenated cadinanes from Baccaris species. |
Ano de publicação: |
1996 |
Fonte/Imprenta: |
Phytochemistry, v.42, n.4, p.1097-1103, 1996. |
Idioma: |
Inglês |
Conteúdo: |
Synthesis of several (+-)-[4S-(4Beta,4aBeta,8aAlpha)]-1,6-dimethyl-4-(1methylethyl)-1,2,3,4,5,8,8a-octahydro-1-naphthalenol derivatives (cadinanolderivatives) provided the necessary evidence for the identification of three novel cadinane derivatives [(+-)[1S-(Beta, 4B, 4aBeta, 8aAlpha)]-1,6-dimethyl-4-(1-methylethyl)-1,2,3,4,4a,5,8,8a-octahydro-1-naphthalenol 11a, (+-)-[1S-(1Beta,4Beta,4aBeta,6Alpha,7Alpha,8aAlpha)]-6,7-epoxide-1,6-dimethyl-4-(1-methylethyl)-1,2,3,4,4a,5,6,7,8,8a-decahydro-1naphthalenol 14 and (=-)[1S-(1Beta,4Beta,4aBeta,6Beta,8aAlpha)]-1,6-dimethyl-4-(1-methylethyl-1,2,3,4,4a,5,6,7,8,8a-decahydro-1,6-naphthalenediol 15] detected, in the essentialoils of, B. platipoda. Compound 14 was also detected in B. tridentata. The synthetic compounds were characterized by one and two dimensional 1H and 13C NMR. The identification was obtained by coinjection of the oils with the synthetic standards and fragmentation pattern comparison. |
Palavras-Chave: |
Baccharis myriocephala; Baccharis platipoda; Baccharis tridentata; Cadinols; Novel cadinanes; Sesquiterpenes. |
Thesagro: |
Compositae. |
Thesaurus Nal: |
essential oils. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01625naa a2200241 a 4500 001 1012541 005 2016-12-26 008 1996 bl uuuu u00u1 u #d 100 1 $aQUEIROGA, C. L. 245 $aThree new oxygenated cadinanes from Baccaris species.$h[electronic resource] 260 $c1996 520 $aSynthesis of several (+-)-[4S-(4Beta,4aBeta,8aAlpha)]-1,6-dimethyl-4-(1methylethyl)-1,2,3,4,5,8,8a-octahydro-1-naphthalenol derivatives (cadinanolderivatives) provided the necessary evidence for the identification of three novel cadinane derivatives [(+-)[1S-(Beta, 4B, 4aBeta, 8aAlpha)]-1,6-dimethyl-4-(1-methylethyl)-1,2,3,4,4a,5,8,8a-octahydro-1-naphthalenol 11a, (+-)-[1S-(1Beta,4Beta,4aBeta,6Alpha,7Alpha,8aAlpha)]-6,7-epoxide-1,6-dimethyl-4-(1-methylethyl)-1,2,3,4,4a,5,6,7,8,8a-decahydro-1naphthalenol 14 and (=-)[1S-(1Beta,4Beta,4aBeta,6Beta,8aAlpha)]-1,6-dimethyl-4-(1-methylethyl-1,2,3,4,4a,5,6,7,8,8a-decahydro-1,6-naphthalenediol 15] detected, in the essentialoils of, B. platipoda. Compound 14 was also detected in B. tridentata. The synthetic compounds were characterized by one and two dimensional 1H and 13C NMR. The identification was obtained by coinjection of the oils with the synthetic standards and fragmentation pattern comparison. 650 $aessential oils 650 $aCompositae 653 $aBaccharis myriocephala 653 $aBaccharis platipoda 653 $aBaccharis tridentata 653 $aCadinols 653 $aNovel cadinanes 653 $aSesquiterpenes 700 1 $aFERRACINI, V. L. 700 1 $aMARSAIOLI, A. J. 773 $tPhytochemistry$gv.42, n.4, p.1097-1103, 1996.
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Embrapa Meio Ambiente (CNPMA) |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
Data corrente: |
24/07/2019 |
Data da última atualização: |
02/10/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
ROCHA, M. G. da; BARROS, F. M. M. de; OLIVEIRA, S. R. de M.; AMARAL, L. R. do. |
Afiliação: |
MURILLO GRESPAN DA ROCHA, Feagri/Unicamp; FLÁVIO MARGARITO MARTINS DE BARROS, Feagri/Unicamp; STANLEY ROBSON DE MEDEIROS OLIVEIRA, CNPTIA; LUCAS RIOS DO AMARAL, Feagri/Unicamp. |
Título: |
Biometric characteristics and canopy reflectance association for early-stage sugarcane. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Scientia Agricola, v. 76, n. 4, p. 274-280, July/Aug. 2019 |
DOI: |
http://dx.doi.org/10.1590/1678-992X-2017-0301 |
Idioma: |
Inglês |
Conteúdo: |
ABSTRACT: Knowing the spatial variability of sugarcane biomass in the early stages of development may help growers in their management decision-making. Proximal canopy sensing is a promising technology that can identify this variability but is limited to quantifying plant-specific parameters. In this study, we evaluated whether biometric variables integrated with canopy reflectance data can assist in the generation of models for early-stage sugarcane biomass prediction. To substantiate this assertion, four sugarcane-producing fields were measured with an active crop canopy sensor and 30 sampling plots were selected for manually quantifying chlorophyll content, plant height, stalk number and aboveground biomass. We determined that Random Forest and Multiple Linear Regression models are similarly able to predict biomass, and that associating biometric variables such as number of stalks and plant height with reflectance data can assist model performance, depending on the attributes selected. This indicates that, when estimating biomass in the early stages, sugarcane growers can carry out site-specific management in order to increase yield and reduce the use of inputs. |
Palavras-Chave: |
Canopy sensor; Data mining; Floresta aleatória; Índice de vegetação; Mineração de dados; Precision farming; Random forest; Vegetation indices. |
Thesagro: |
Agricultura de Precisão; Biomassa; Cana de Açúcar. |
Thesaurus NAL: |
Biomass; Precision agriculture; Sugarcane; Vegetation index. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/199820/1/AP-Biometric-characteristics.pdf
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Marc: |
LEADER 02240naa a2200349 a 4500 001 2110823 005 2019-10-02 008 2019 bl uuuu u00u1 u #d 024 7 $ahttp://dx.doi.org/10.1590/1678-992X-2017-0301$2DOI 100 1 $aROCHA, M. G. da 245 $aBiometric characteristics and canopy reflectance association for early-stage sugarcane.$h[electronic resource] 260 $c2019 520 $aABSTRACT: Knowing the spatial variability of sugarcane biomass in the early stages of development may help growers in their management decision-making. Proximal canopy sensing is a promising technology that can identify this variability but is limited to quantifying plant-specific parameters. In this study, we evaluated whether biometric variables integrated with canopy reflectance data can assist in the generation of models for early-stage sugarcane biomass prediction. To substantiate this assertion, four sugarcane-producing fields were measured with an active crop canopy sensor and 30 sampling plots were selected for manually quantifying chlorophyll content, plant height, stalk number and aboveground biomass. We determined that Random Forest and Multiple Linear Regression models are similarly able to predict biomass, and that associating biometric variables such as number of stalks and plant height with reflectance data can assist model performance, depending on the attributes selected. This indicates that, when estimating biomass in the early stages, sugarcane growers can carry out site-specific management in order to increase yield and reduce the use of inputs. 650 $aBiomass 650 $aPrecision agriculture 650 $aSugarcane 650 $aVegetation index 650 $aAgricultura de Precisão 650 $aBiomassa 650 $aCana de Açúcar 653 $aCanopy sensor 653 $aData mining 653 $aFloresta aleatória 653 $aÍndice de vegetação 653 $aMineração de dados 653 $aPrecision farming 653 $aRandom forest 653 $aVegetation indices 700 1 $aBARROS, F. M. M. de 700 1 $aOLIVEIRA, S. R. de M. 700 1 $aAMARAL, L. R. do 773 $tScientia Agricola$gv. 76, n. 4, p. 274-280, July/Aug. 2019
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