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Registro Completo |
Biblioteca(s): |
Embrapa Florestas; Embrapa Pantanal; Embrapa Suínos e Aves; Embrapa Territorial. |
Data corrente: |
25/10/2019 |
Data da última atualização: |
19/11/2019 |
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
Autoria: |
MARQUES, D. K. S.; SILVA, J. C. B.; OLIVEIRA, M. D. de; MATTHIENSEN, A.; IEDE, E. T.; LISITA, F. O.; GERHARD, P.; SANTOS, S. A.; PENTEADO, S. do R. C.; SALIS, S. M. de; ABREU, U. G. P. de; REIS, V. D. A. dos. |
Afiliação: |
DEBORA KARLA SILVESTRE MARQUES, CPAP; JULIANA CORREA BORGES SILVA, CPAP; MARCIA DIVINA DE OLIVEIRA, CPAP; ALEXANDRE MATTHIENSEN, CNPSA; EDSON TADEU IEDE, CNPF; FREDERICO OLIVIERI LISITA, CPAP; PEDRO GERHARD, CNPM; SANDRA APARECIDA SANTOS, CPAP; SUSETE DO ROCIO CHIARELLO PENTEADO, CNPF; SUZANA MARIA DE SALIS, CPAP; URBANO GOMES PINTO DE ABREU, CPAP; VANDERLEI DONISETI ACASSIO DOS REIS, CPAP. |
Título: |
Alien species: economical use, control and impact reduction. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
In: VILELA, G. F.; BENTES, M. P. de M.; OLIVEIRA, Y. M. M. de; MARQUES, D. K. S.; SILVA, J. C. B. (Ed.). Life on land: contributions of Embrapa. Brasília, DF: Embrapa, 2019. E-book. (Sustainable development goal, 15). |
Páginas: |
p. 95-104. |
Idioma: |
Inglês |
Conteúdo: |
This chapter deals with the contributions of the Brazilian Agricultural Research Corporation (Embrapa) to reach target 15.8 of the Sustainable Development Goals 15 (United Nations, 2018): By 2020, introduce measures to prevent the introduction and significantly reduce the impact of invasive alien species on land and water ecosystems and control or eradicate the priority species. Invasive species are one of the most important environmental challenges in the world. It is not always possible to combat them; generally, complex and expensive proceedings without guaranteed results are necessary. To reduce the impact of alien organisms on the environment, management strategies are used aiming to create mechanisms of environmental resistance. |
Thesagro: |
Biodiversidade. |
Thesaurus Nal: |
Biodiversity; Invasive species. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/203769/1/Alien-species-economical-use-2019.pdf
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Marc: |
LEADER 01748naa a2200301 a 4500 001 2113495 005 2019-11-19 008 2019 bl uuuu u00u1 u #d 100 1 $aMARQUES, D. K. S. 245 $aAlien species$beconomical use, control and impact reduction.$h[electronic resource] 260 $c2019 300 $ap. 95-104. 520 $aThis chapter deals with the contributions of the Brazilian Agricultural Research Corporation (Embrapa) to reach target 15.8 of the Sustainable Development Goals 15 (United Nations, 2018): By 2020, introduce measures to prevent the introduction and significantly reduce the impact of invasive alien species on land and water ecosystems and control or eradicate the priority species. Invasive species are one of the most important environmental challenges in the world. It is not always possible to combat them; generally, complex and expensive proceedings without guaranteed results are necessary. To reduce the impact of alien organisms on the environment, management strategies are used aiming to create mechanisms of environmental resistance. 650 $aBiodiversity 650 $aInvasive species 650 $aBiodiversidade 700 1 $aSILVA, J. C. B. 700 1 $aOLIVEIRA, M. D. de 700 1 $aMATTHIENSEN, A. 700 1 $aIEDE, E. T. 700 1 $aLISITA, F. O. 700 1 $aGERHARD, P. 700 1 $aSANTOS, S. A. 700 1 $aPENTEADO, S. do R. C. 700 1 $aSALIS, S. M. de 700 1 $aABREU, U. G. P. de 700 1 $aREIS, V. D. A. dos 773 $tIn: VILELA, G. F.; BENTES, M. P. de M.; OLIVEIRA, Y. M. M. de; MARQUES, D. K. S.; SILVA, J. C. B. (Ed.). Life on land: contributions of Embrapa. Brasília, DF: Embrapa, 2019. E-book. (Sustainable development goal, 15).
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Registro original: |
Embrapa Pantanal (CPAP) |
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Registro Completo
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
05/07/2023 |
Data da última atualização: |
05/07/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
RAMOS, B.; VAZ, W. F.; DINIZ, L. F.; SANCHES NETO, F. O.; RIBEIRO, J. C. O.; CARVALHO-SILVA, V. H.; TEIXEIRA, A. C. S. C.; RIBEIRO, C.; NAPOLITANO, H. B.; CARVALHO JR, P. S. |
Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
Título: |
Kinetics, mechanism, and tautomerism in ametryn acid hydrolysis: From molecular structure to environmental impacts. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Chemosphere, v. 324, 138278, 2023. |
Páginas: |
1 - 10 |
ISSN: |
0045-6535 |
DOI: |
https://doi.org/10.1016/j.chemosphere.2023.138278 |
Idioma: |
Inglês |
Conteúdo: |
The excessive use of pesticides and the demand for environmentally friendly compounds have driven the focus to detailed studies of the environmental destination of these compounds. Degradation by hydrolysis of pesticides, when released into the soil, can result in the formation of metabolites with potentially adverse effects on the environment. Moving in this direction, we investigated the mechanism of acid hydrolysis of the herbicide ametryn (AMT) and predicted the toxicities of metabolites through experimental and theoretical approaches. The formation of ionized hydroxyatrazine (HA) occurs with the release of the SCH3- group and the addition of H3O+ to the triazine ring. The tautomerization reactions privileged the conversion of AMT into HA. Furthermore, the ionized HA is stabilized by an intramolecular reaction that provides the molecule in two tautomeric states. Experimentally, the hydrolysis of AMT was obtained under acidic conditions and at room temperature with HA as the main product. HA was isolated in a solid state through its crystallization as organic counterions. The mechanism of conversion of AMT to HA and the experimental investigation of the reaction kinetics allowed us to determine the dissociation of CH3SH as the rate-controlling step in the degradation process that culminates in a half-life between 7 and 24 months under typical acid soil conditions of the Brazilian Midwest ? region with strong agricultural and livestock vocation. The keto and hydroxy metabolites showed substantial thermodynamic stability and a decrease in toxicity compared to AMT. We hope that this comprehensive study will support the understanding of the degradation of s-triazine-based pesticides. MenosThe excessive use of pesticides and the demand for environmentally friendly compounds have driven the focus to detailed studies of the environmental destination of these compounds. Degradation by hydrolysis of pesticides, when released into the soil, can result in the formation of metabolites with potentially adverse effects on the environment. Moving in this direction, we investigated the mechanism of acid hydrolysis of the herbicide ametryn (AMT) and predicted the toxicities of metabolites through experimental and theoretical approaches. The formation of ionized hydroxyatrazine (HA) occurs with the release of the SCH3- group and the addition of H3O+ to the triazine ring. The tautomerization reactions privileged the conversion of AMT into HA. Furthermore, the ionized HA is stabilized by an intramolecular reaction that provides the molecule in two tautomeric states. Experimentally, the hydrolysis of AMT was obtained under acidic conditions and at room temperature with HA as the main product. HA was isolated in a solid state through its crystallization as organic counterions. The mechanism of conversion of AMT to HA and the experimental investigation of the reaction kinetics allowed us to determine the dissociation of CH3SH as the rate-controlling step in the degradation process that culminates in a half-life between 7 and 24 months under typical acid soil conditions of the Brazilian Midwest ? region with strong agricultural and livestock vocation. The keto and hydroxy metabo... Mostrar Tudo |
Palavras-Chave: |
Conversion of AMT in HA; DFT. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02582naa a2200289 a 4500 001 2154804 005 2023-07-05 008 2023 bl uuuu u00u1 u #d 022 $a0045-6535 024 7 $ahttps://doi.org/10.1016/j.chemosphere.2023.138278$2DOI 100 1 $aRAMOS, B. 245 $aKinetics, mechanism, and tautomerism in ametryn acid hydrolysis$bFrom molecular structure to environmental impacts.$h[electronic resource] 260 $c2023 300 $a1 - 10 520 $aThe excessive use of pesticides and the demand for environmentally friendly compounds have driven the focus to detailed studies of the environmental destination of these compounds. Degradation by hydrolysis of pesticides, when released into the soil, can result in the formation of metabolites with potentially adverse effects on the environment. Moving in this direction, we investigated the mechanism of acid hydrolysis of the herbicide ametryn (AMT) and predicted the toxicities of metabolites through experimental and theoretical approaches. The formation of ionized hydroxyatrazine (HA) occurs with the release of the SCH3- group and the addition of H3O+ to the triazine ring. The tautomerization reactions privileged the conversion of AMT into HA. Furthermore, the ionized HA is stabilized by an intramolecular reaction that provides the molecule in two tautomeric states. Experimentally, the hydrolysis of AMT was obtained under acidic conditions and at room temperature with HA as the main product. HA was isolated in a solid state through its crystallization as organic counterions. The mechanism of conversion of AMT to HA and the experimental investigation of the reaction kinetics allowed us to determine the dissociation of CH3SH as the rate-controlling step in the degradation process that culminates in a half-life between 7 and 24 months under typical acid soil conditions of the Brazilian Midwest ? region with strong agricultural and livestock vocation. The keto and hydroxy metabolites showed substantial thermodynamic stability and a decrease in toxicity compared to AMT. We hope that this comprehensive study will support the understanding of the degradation of s-triazine-based pesticides. 653 $aConversion of AMT in HA 653 $aDFT 700 1 $aVAZ, W. F. 700 1 $aDINIZ, L. F. 700 1 $aSANCHES NETO, F. O. 700 1 $aRIBEIRO, J. C. O. 700 1 $aCARVALHO-SILVA, V. H. 700 1 $aTEIXEIRA, A. C. S. C. 700 1 $aRIBEIRO, C. 700 1 $aNAPOLITANO, H. B. 700 1 $aCARVALHO JR, P. S. 773 $tChemosphere$gv. 324, 138278, 2023.
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