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Registro Completo |
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
05/12/2019 |
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Data da última atualização: |
05/12/2019 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
ABREU, A. G.; COLOMBARI FILHO, J. M.; BRITO, G. G.; FERREIRA, M. E.; RANGEL, P. H. N.; FAGUNDES, P. R. R. |
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Afiliação: |
ALUANA GONCALVES DE ABREU, CNPAF; JOSE MANOEL COLOMBARI FILHO, CNPAF; GIOVANI GREIGH DE BRITO, CNPA; MARCIO ELIAS FERREIRA, Cenargen; PAULO HIDEO NAKANO RANGEL, CNPAF; PAULO RICARDO REIS FAGUNDES, CPACT. |
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Título: |
Embrapa disponibilizará a primeira coleção nuclear temática de arroz para tolerância a temperaturas infraótima. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ARROZ IRRIGADO, 11., 2019. Balneário Camboriú, SC. Inovação e desenvolvimento na orizicultura: anais eletrônico. Itajaí: Epagri: Sosbai, 2019. |
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Idioma: |
Português |
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Notas: |
Ciência em notícia. |
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Conteúdo: |
Com objetivo de definir uma Coleção Temática de Arroz para Tolerância a Temperaturas Infraótima (CTATF), partiu-se de 256 genótipos, sendo 232 acessos do Banco Ativo de Germoplasma de Arroz (BAG Arroz) da Embrapa, previamente identificados como tolerantes a temperaturas infraótima em base de dados;e 24 linhagens elite da Embrapa e cultivares. |
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Palavras-Chave: |
Coleção nuclear. |
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Thesagro: |
Arroz; Banco de Germoplasma; Coleção de Planta; Melhoramento Genético Vegetal; Oryza Sativa. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/201557/1/CNPAF-2019-cbai-aga2.pdf
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Marc: |
LEADER 01279nam a2200253 a 4500
001 2116041
005 2019-12-05
008 2019 bl uuuu u01u1 u #d
100 1 $aABREU, A. G.
245 $aEmbrapa disponibilizará a primeira coleção nuclear temática de arroz para tolerância a temperaturas infraótima.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE ARROZ IRRIGADO, 11., 2019. Balneário Camboriú, SC. Inovação e desenvolvimento na orizicultura: anais eletrônico. Itajaí: Epagri: Sosbai$c2019
500 $aCiência em notícia.
520 $aCom objetivo de definir uma Coleção Temática de Arroz para Tolerância a Temperaturas Infraótima (CTATF), partiu-se de 256 genótipos, sendo 232 acessos do Banco Ativo de Germoplasma de Arroz (BAG Arroz) da Embrapa, previamente identificados como tolerantes a temperaturas infraótima em base de dados;e 24 linhagens elite da Embrapa e cultivares.
650 $aArroz
650 $aBanco de Germoplasma
650 $aColeção de Planta
650 $aMelhoramento Genético Vegetal
650 $aOryza Sativa
653 $aColeção nuclear
700 1 $aCOLOMBARI FILHO, J. M.
700 1 $aBRITO, G. G.
700 1 $aFERREIRA, M. E.
700 1 $aRANGEL, P. H. N.
700 1 $aFAGUNDES, P. R. R.
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Registro original: |
Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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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: |
13/08/2004 |
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Data da última atualização: |
08/03/2010 |
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Autoria: |
GARBIN, J. R.; MILORI, D. M. B. P.; SIMÕES, M. L.; SILVA, W. T. L. DA; MARTIN-NETO, L. |
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Título: |
Spectroscopical analysis of humic acids influence over the photolysis of aqueous pesticide residues. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
In: INTERNATIONAL MEETING OF INTERNATIONAL HUMIC SUBSTANCES SOCIETY. -- IHSS, 12, São Pedro, SP, 2004. Humic substances and soil and water environment. Abstracts...[São Carlos], SP: Embrapa Instrumentação Agropecuária, 2004. p. 78. |
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Idioma: |
Inglês |
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Conteúdo: |
I. INTRODUCTION
Pesticide residues are nowadays considered the second largest source of drink water contamination and this kind of residue rarely causes fast manifestation of diseases, but it presents a cumulative effect in the organism which can leads to cromossomal damages and carcinogen effects (Dubus et al., 2000, Helmuth et al., 2000). Several alternative methods have been proposed to solve this problem and special attention has been given to the use of UV light to promote the total degradatíon of the residues, because it's a non-selective method that brings the perspective to use sunlight for solving environmental problems (CYTED, 2001). Pesticide photolysis can occur by direct or indirect way (photocatalysis). Titanium dioxide (TiO2), a low cost, stable and non-toxic semiconductor, is the most commonly used photocatalyst which absorbs light around 360 nm, generating hydroxyl radicais (.OH) in the solution, which attack the pesticide molecules starting or accelerating their breakage.
Humic substances (HS) can affect the photolysis and photocatalysis processes once these compounds to show intense absorption bands over UV range and they can quickly react with -OH. However, the entire mechanism of HS influence over pesticides photolysis remain still unknown (Kamiya and Kameyama, 1998 and Westerhoff et al., 1999). So, is necessary a better knowledge of HS effect on the process to use photolysis and photocatalysis by TiO2 for drink water treatment., because HS are naturally presents in lhe aquatic environment.
The purpose of this work was to analyse the influence of different kinds and concentrations of HS over direct photolysis and photocatalysis of pesticides in aqueous solution, under UV-visible radiation (280-480nm). Were used UV-visible absorption and fluorescence emission spectroscopy to measure the pesticides photolysis rate and Electron Paramagnetic Resonance (EPR) spectroscopy measurements to attend the -OH photogeneration by HA during irradiation. MenosI. INTRODUCTION
Pesticide residues are nowadays considered the second largest source of drink water contamination and this kind of residue rarely causes fast manifestation of diseases, but it presents a cumulative effect in the organism which can leads to cromossomal damages and carcinogen effects (Dubus et al., 2000, Helmuth et al., 2000). Several alternative methods have been proposed to solve this problem and special attention has been given to the use of UV light to promote the total degradatíon of the residues, because it's a non-selective method that brings the perspective to use sunlight for solving environmental problems (CYTED, 2001). Pesticide photolysis can occur by direct or indirect way (photocatalysis). Titanium dioxide (TiO2), a low cost, stable and non-toxic semiconductor, is the most commonly used photocatalyst which absorbs light around 360 nm, generating hydroxyl radicais (.OH) in the solution, which attack the pesticide molecules starting or accelerating their breakage.
Humic substances (HS) can affect the photolysis and photocatalysis processes once these compounds to show intense absorption bands over UV range and they can quickly react with -OH. However, the entire mechanism of HS influence over pesticides photolysis remain still unknown (Kamiya and Kameyama, 1998 and Westerhoff et al., 1999). So, is necessary a better knowledge of HS effect on the process to use photolysis and photocatalysis by TiO2 for drink water treatment., because HS are natural... Mostrar Tudo |
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Palavras-Chave: |
hydroxyl radical; Pesticidas; pesticides photolysis. |
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Thesaurus NAL: |
humic acids. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02816naa a2200217 a 4500
001 1028741
005 2010-03-08
008 2004 bl --- 0-- u #d
100 1 $aGARBIN, J. R.
245 $aSpectroscopical analysis of humic acids influence over the photolysis of aqueous pesticide residues.
260 $c2004
520 $aI. INTRODUCTION Pesticide residues are nowadays considered the second largest source of drink water contamination and this kind of residue rarely causes fast manifestation of diseases, but it presents a cumulative effect in the organism which can leads to cromossomal damages and carcinogen effects (Dubus et al., 2000, Helmuth et al., 2000). Several alternative methods have been proposed to solve this problem and special attention has been given to the use of UV light to promote the total degradatíon of the residues, because it's a non-selective method that brings the perspective to use sunlight for solving environmental problems (CYTED, 2001). Pesticide photolysis can occur by direct or indirect way (photocatalysis). Titanium dioxide (TiO2), a low cost, stable and non-toxic semiconductor, is the most commonly used photocatalyst which absorbs light around 360 nm, generating hydroxyl radicais (.OH) in the solution, which attack the pesticide molecules starting or accelerating their breakage. Humic substances (HS) can affect the photolysis and photocatalysis processes once these compounds to show intense absorption bands over UV range and they can quickly react with -OH. However, the entire mechanism of HS influence over pesticides photolysis remain still unknown (Kamiya and Kameyama, 1998 and Westerhoff et al., 1999). So, is necessary a better knowledge of HS effect on the process to use photolysis and photocatalysis by TiO2 for drink water treatment., because HS are naturally presents in lhe aquatic environment. The purpose of this work was to analyse the influence of different kinds and concentrations of HS over direct photolysis and photocatalysis of pesticides in aqueous solution, under UV-visible radiation (280-480nm). Were used UV-visible absorption and fluorescence emission spectroscopy to measure the pesticides photolysis rate and Electron Paramagnetic Resonance (EPR) spectroscopy measurements to attend the -OH photogeneration by HA during irradiation.
650 $ahumic acids
653 $ahydroxyl radical
653 $aPesticidas
653 $apesticides photolysis
700 1 $aMILORI, D. M. B. P.
700 1 $aSIMÕES, M. L.
700 1 $aSILVA, W. T. L. DA
700 1 $aMARTIN-NETO, L.
773 $tIn: INTERNATIONAL MEETING OF INTERNATIONAL HUMIC SUBSTANCES SOCIETY. -- IHSS, 12, São Pedro, SP, 2004. Humic substances and soil and water environment. Abstracts...[São Carlos], SP: Embrapa Instrumentação Agropecuária, 2004. p. 78.
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Embrapa Instrumentação (CNPDIA) |
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