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Registro Completo |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
03/03/2009 |
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Data da última atualização: |
03/03/2009 |
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Autoria: |
LASTE, K. C. D.; GONÇALVES, F. S.; UCHÔAS, E. da S.; FARIA, S. M. de. |
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Título: |
Seleção de estirpes de bactérias eficientes na fixação biológica de nitrogênio em simbiose com leguminosas florestais. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Seropédica: Embrapa Agrobiologia, 2007. |
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Páginas: |
29 p. |
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Descrição Física: |
il. |
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Série: |
(Embrapa Agrobiologia. Documentos, 246). |
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Idioma: |
Português |
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Palavras-Chave: |
Fixação biológica de nitrogênio; leguminosa florestal. |
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Thesagro: |
Simbiose. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00651nam a2200193 a 4500
001 1125440
005 2009-03-03
008 2007 bl uuuu u0uu1 u #d
100 1 $aLASTE, K. C. D.
245 $aSeleção de estirpes de bactérias eficientes na fixação biológica de nitrogênio em simbiose com leguminosas florestais.
260 $aSeropédica: Embrapa Agrobiologia$c2007
300 $a29 p. $cil.
490 $a(Embrapa Agrobiologia. Documentos, 246).
650 $aSimbiose
653 $aFixação biológica de nitrogênio
653 $aleguminosa florestal
700 1 $aGONÇALVES, F. S.
700 1 $aUCHÔAS, E. da S.
700 1 $aFARIA, S. M. de
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
28/09/2021 |
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Data da última atualização: |
10/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
CHRISTINELLI, W. A.; SHIMIZU, F. M.; FACURE, M. H. M.; CERRI, R.; OLIVEIRA JUNIOR, O. N.; CORREA, D. S.; MATTOSO, L. H. C. |
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Afiliação: |
DANIEL SOUZA CORREA, CNPDIA; LUIZ HENRIQUE CAPPARELLI MATTOSO, CNPDIA. |
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Título: |
Two-dimensional MoS2-based impedimetric electronic tongue for the discrimination of endocrine disrupting chemicals using machine learning. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Sensors and Actuators: B. Chemical, v. 336, 129696, 2021. |
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Páginas: |
1 - 11 |
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ISSN: |
0925-4005 |
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DOI: |
https://doi.org/10.1016/j.snb.2021.129696 |
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Idioma: |
Inglês |
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Conteúdo: |
In this paper, we report on machine learning to analyze the capacitance spectra obtained with an electronic tongue (e-tongue) and discriminate three endocrine-disrupting chemicals (EDC): bisphenol A, estrone, and 17- β-estradiol, and their mixtures. The e-tongue comprised seven sensing units made with interdigitated gold electrodes coated with layer-by-layer films of poly(o-methoxy aniline), poly(3-thiophene acetic acid), and molybdenum disulfide (MoS2). The Multilayer Perceptron (MLP), Random Forest, and Extreme Gradient Boosting (XGBoost) models were applied for multi-target regression to predict the concentration of individual contaminants and their mixtures. These machine learning models were evaluated according to the root mean square error (RMSE) values. The best performance was achieved with XGBoost for which RMSE ranged from 0.19 to 3.37 for individual contaminants, from 0.12 to 0.25 for the mixtures, and from 0.34 to 3.46 for the entire dataset. The high performance was only possible with a multi-target regression strategy, including a feature selection procedure. In the latter, the data were plotted with the parallel coordinate technique, and the silhouette coefficient was calculated, which is a quantitative measure of the ability to distinguish similar samples in a dataset. The usefulness of the machine learning methods is demonstrated by noting that the data from mixtures of EDCs could not be distinguished using multidimensional projections. Also significant is that this combination of machine learning and information visualization methodology is entirely generic; it may be applied to analyze data from etongues and other sensing and biosensing devices in prediction tasks as demanding as in the discrimination of mixtures of EDCs at concentrations below nmol L− 1 . MenosIn this paper, we report on machine learning to analyze the capacitance spectra obtained with an electronic tongue (e-tongue) and discriminate three endocrine-disrupting chemicals (EDC): bisphenol A, estrone, and 17- β-estradiol, and their mixtures. The e-tongue comprised seven sensing units made with interdigitated gold electrodes coated with layer-by-layer films of poly(o-methoxy aniline), poly(3-thiophene acetic acid), and molybdenum disulfide (MoS2). The Multilayer Perceptron (MLP), Random Forest, and Extreme Gradient Boosting (XGBoost) models were applied for multi-target regression to predict the concentration of individual contaminants and their mixtures. These machine learning models were evaluated according to the root mean square error (RMSE) values. The best performance was achieved with XGBoost for which RMSE ranged from 0.19 to 3.37 for individual contaminants, from 0.12 to 0.25 for the mixtures, and from 0.34 to 3.46 for the entire dataset. The high performance was only possible with a multi-target regression strategy, including a feature selection procedure. In the latter, the data were plotted with the parallel coordinate technique, and the silhouette coefficient was calculated, which is a quantitative measure of the ability to distinguish similar samples in a dataset. The usefulness of the machine learning methods is demonstrated by noting that the data from mixtures of EDCs could not be distinguished using multidimensional projections. Also significant is t... Mostrar Tudo |
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Palavras-Chave: |
Information visualization; Machine learning; XGBoost. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02660naa a2200265 a 4500
001 2134828
005 2022-06-10
008 2021 bl uuuu u00u1 u #d
022 $a0925-4005
024 7 $ahttps://doi.org/10.1016/j.snb.2021.129696$2DOI
100 1 $aCHRISTINELLI, W. A.
245 $aTwo-dimensional MoS2-based impedimetric electronic tongue for the discrimination of endocrine disrupting chemicals using machine learning.$h[electronic resource]
260 $c2021
300 $a1 - 11
520 $aIn this paper, we report on machine learning to analyze the capacitance spectra obtained with an electronic tongue (e-tongue) and discriminate three endocrine-disrupting chemicals (EDC): bisphenol A, estrone, and 17- β-estradiol, and their mixtures. The e-tongue comprised seven sensing units made with interdigitated gold electrodes coated with layer-by-layer films of poly(o-methoxy aniline), poly(3-thiophene acetic acid), and molybdenum disulfide (MoS2). The Multilayer Perceptron (MLP), Random Forest, and Extreme Gradient Boosting (XGBoost) models were applied for multi-target regression to predict the concentration of individual contaminants and their mixtures. These machine learning models were evaluated according to the root mean square error (RMSE) values. The best performance was achieved with XGBoost for which RMSE ranged from 0.19 to 3.37 for individual contaminants, from 0.12 to 0.25 for the mixtures, and from 0.34 to 3.46 for the entire dataset. The high performance was only possible with a multi-target regression strategy, including a feature selection procedure. In the latter, the data were plotted with the parallel coordinate technique, and the silhouette coefficient was calculated, which is a quantitative measure of the ability to distinguish similar samples in a dataset. The usefulness of the machine learning methods is demonstrated by noting that the data from mixtures of EDCs could not be distinguished using multidimensional projections. Also significant is that this combination of machine learning and information visualization methodology is entirely generic; it may be applied to analyze data from etongues and other sensing and biosensing devices in prediction tasks as demanding as in the discrimination of mixtures of EDCs at concentrations below nmol L− 1 .
653 $aInformation visualization
653 $aMachine learning
653 $aXGBoost
700 1 $aSHIMIZU, F. M.
700 1 $aFACURE, M. H. M.
700 1 $aCERRI, R.
700 1 $aOLIVEIRA JUNIOR, O. N.
700 1 $aCORREA, D. S.
700 1 $aMATTOSO, L. H. C.
773 $tSensors and Actuators: B. Chemical$gv. 336, 129696, 2021.
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