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Registro Completo |
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Biblioteca(s): |
Embrapa Pesca e Aquicultura. |
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Data corrente: |
23/10/2020 |
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Data da última atualização: |
23/10/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SOUSA, D. N. de; SOUSA, M. S. C.; RODRIGUES, W. |
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Afiliação: |
DIEGO NEVES DE SOUSA, CNPASA; MICHELE SILVA COSTA SOUSA, doutoranda UFT; WALDECY RODRIGUES. |
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Título: |
Desenvolvimento rural e políticas públicas: as organizações de apoio à agricultura familiar e os espaços de debate no Tocantins. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Humanidades & Inovação, v. 7, n. 14, p. 37-46, 2020. |
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ISSN: |
2358-8322 |
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Idioma: |
Português |
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Conteúdo: |
Este artigo tem como objetivo identificar as organizações que atuam junto aos públicos da agricultura familiar e os espaços de debate sobre políticas públicas de desenvolvimento rural que ocorrem do Tocantins. Para isso, realizaram-se entrevistas semiestruturadas com mediadores da rede sociotécnica da agricultura familiar do referido estado. A principal protagonista do desenvolvimento rural é o Instituto de Desenvolvimento Rural do Tocantins (Ruraltins) dada a ampla capilaridade nos municípios, por conter diferentes competências em seu quadro técnico e ser executora de políticas públicas, apesar de se constatar as dificuldades financeiras para custear e manter as atividades básicas do serviço de Assistência Técnica e Extensão Rural (Ater). Os espaços de debate estão concentrados em Palmas e o principal é o Conselho Estadual de Desenvolvimento Rural Sustentável (Cedrus). Em geral, não possuem frequência definida para a realização de reuniões e nem sempre existe comprometimento no cumprimento da agenda pública, por parte de algumas organizações, para a promoção de ações junto aos agricultores familiares. |
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Palavras-Chave: |
Ater; Concertação; Inclusão produtiva; Tocantins. |
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Thesagro: |
Agricultura Familiar; Desenvolvimento Rural; Políticas Públicas. |
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Thesaurus Nal: |
Family farms; Laws and regulations; Rural development. |
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Categoria do assunto: |
B Sociologia Rural |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/216961/1/CNPASA-2020-hi-Tocantins.pdf
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Marc: |
LEADER 02003naa a2200277 a 4500
001 2125802
005 2020-10-23
008 2020 bl uuuu u00u1 u #d
022 $a2358-8322
100 1 $aSOUSA, D. N. de
245 $aDesenvolvimento rural e políticas públicas$bas organizações de apoio à agricultura familiar e os espaços de debate no Tocantins.$h[electronic resource]
260 $c2020
520 $aEste artigo tem como objetivo identificar as organizações que atuam junto aos públicos da agricultura familiar e os espaços de debate sobre políticas públicas de desenvolvimento rural que ocorrem do Tocantins. Para isso, realizaram-se entrevistas semiestruturadas com mediadores da rede sociotécnica da agricultura familiar do referido estado. A principal protagonista do desenvolvimento rural é o Instituto de Desenvolvimento Rural do Tocantins (Ruraltins) dada a ampla capilaridade nos municípios, por conter diferentes competências em seu quadro técnico e ser executora de políticas públicas, apesar de se constatar as dificuldades financeiras para custear e manter as atividades básicas do serviço de Assistência Técnica e Extensão Rural (Ater). Os espaços de debate estão concentrados em Palmas e o principal é o Conselho Estadual de Desenvolvimento Rural Sustentável (Cedrus). Em geral, não possuem frequência definida para a realização de reuniões e nem sempre existe comprometimento no cumprimento da agenda pública, por parte de algumas organizações, para a promoção de ações junto aos agricultores familiares.
650 $aFamily farms
650 $aLaws and regulations
650 $aRural development
650 $aAgricultura Familiar
650 $aDesenvolvimento Rural
650 $aPolíticas Públicas
653 $aAter
653 $aConcertação
653 $aInclusão produtiva
653 $aTocantins
700 1 $aSOUSA, M. S. C.
700 1 $aRODRIGUES, W.
773 $tHumanidades & Inovação$gv. 7, n. 14, p. 37-46, 2020.
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Registro original: |
Embrapa Pesca e Aquicultura (CNPASA) |
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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: |
07/03/2001 |
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Data da última atualização: |
16/04/2007 |
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Autoria: |
ASSIS, O. B. G.; FLORES, A. M.; CAMPANA FILHO, S. P. |
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Afiliação: |
Embrapa Instrumentacao Agropecuaria; USP-IQSC. |
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Título: |
A liquid-cromatography evaluation of atrazine sorption by CMC. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
In: SIMPOSIUM LATINOAMERICANO DE POLIMEROS-SLAP 2000, 7.; CONGRESO IBEROAMERICANO DE POLIMEROS, 5.; SIMPOSIUM LATINOAMERICANO DE QUITINA Y QUITOSANA, 1., 2000, La Habana. Livro de resumenes=Livro de resumos=Book of abstracts... La Habana: Sociedad Cubana de Quimica,2000. |
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Páginas: |
p. 286. |
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Idioma: |
Inglês |
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Notas: |
Ref. 7-C8. |
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Conteúdo: |
Cellulose and its derivatives have been widely used in a broad range of applications from biomedical, food and textiles to environmental fields. In particular, the carboxymethylcellulose (CMC) has been attracting attention due to its technological uses. CMC is a strong film former, adhesive and agglutinating material, food stabilizer, as well as having excellent liquid absorbent proprieties with potential to be used in wastewater purifying systems. CMC degrades completely which is a characteristic of interest due to the possibility of interacting with contaminates, be removed and reallocated in a safety site. In this work, the degree os sorption of the herbicide atrazine (ATZ) by CMC was evaluted via HPLC (High performance liquid-chromatography). The experimental procedure consisted in identifying the ultra-violet ATZ` absorption band followed by quantitative valuation of ATZ-CMC interaction in function of time. Atrazine (2-chloro-4-ethylamino-6isopropylamino-1,3,5-triazine) (99% purity) was prepared in 30mgLE-1 concentration in deionised water and methanol (1% v/v), and kept in solution with CMC aqueous batch (240gmolE-1 active sites) in moderated stirring for 48 hours. Two typical absorpition peaks, at 260 and 223nm characterize the herbicide U.V. spectrum. For chromatographic analysis was used a Shimadzu Chromatographer CBM-10A system with automatic injection sample volume. The optimum move phase composition was MeOH:H2O (70:30) in 1 mL/min flux. The analyses were carried out in a proportion of 20:1 CMC-ATZ. Concentrations of 12 and 1.5ppm ATZ at 30min. and 48 hours CMC interaction were analysed. The choice of these interaction intervals is based on the previous works carried out by DPP (differential pulse polarography). From the chromatograms , it is seen that the higer intensity peak appears at approximately 4.6 minutes in 223nm. By numerical integration the sorption of ATZ by CMC, related to the initial and final period interaction, showed a reduction of 6.5% of ATZ in 12ppm solution and 3.1% in !.5ppm solution.This wavelength corresponds to the absorbance band of ATZ. The other resulting peaks are related to impurities of the commercial ATZ composition. Although numerically short, these values are significant concerning the low interactivity presented by ATZ molecules. This difference is understood as owing to the CMC-ATZ proportion, i,e., since the volume relation keeps the same, the 1.5ppm, in 20:1 solution is not efficient as 70:1, where in the first the molecules present a higer degree of liberty reducing their interactivity MenosCellulose and its derivatives have been widely used in a broad range of applications from biomedical, food and textiles to environmental fields. In particular, the carboxymethylcellulose (CMC) has been attracting attention due to its technological uses. CMC is a strong film former, adhesive and agglutinating material, food stabilizer, as well as having excellent liquid absorbent proprieties with potential to be used in wastewater purifying systems. CMC degrades completely which is a characteristic of interest due to the possibility of interacting with contaminates, be removed and reallocated in a safety site. In this work, the degree os sorption of the herbicide atrazine (ATZ) by CMC was evaluted via HPLC (High performance liquid-chromatography). The experimental procedure consisted in identifying the ultra-violet ATZ` absorption band followed by quantitative valuation of ATZ-CMC interaction in function of time. Atrazine (2-chloro-4-ethylamino-6isopropylamino-1,3,5-triazine) (99% purity) was prepared in 30mgLE-1 concentration in deionised water and methanol (1% v/v), and kept in solution with CMC aqueous batch (240gmolE-1 active sites) in moderated stirring for 48 hours. Two typical absorpition peaks, at 260 and 223nm characterize the herbicide U.V. spectrum. For chromatographic analysis was used a Shimadzu Chromatographer CBM-10A system with automatic injection sample volume. The optimum move phase composition was MeOH:H2O (70:30) in 1 mL/min flux. The analyses were carried... Mostrar Tudo |
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Palavras-Chave: |
ATZ; CMC; Cromatografia liquida; High performance liquid-chromatography; HLPC; Instrumentacao; Tecnica; Ultravioleta. |
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Thesagro: |
Atrazina; Carboximetilcelulose. |
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Thesaurus NAL: |
chromatography. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03589naa a2200301 a 4500
001 1027390
005 2007-04-16
008 2000 bl --- 0-- u #d
100 1 $aASSIS, O. B. G.
245 $aA liquid-cromatography evaluation of atrazine sorption by CMC.
260 $c2000
300 $ap. 286.
500 $aRef. 7-C8.
520 $aCellulose and its derivatives have been widely used in a broad range of applications from biomedical, food and textiles to environmental fields. In particular, the carboxymethylcellulose (CMC) has been attracting attention due to its technological uses. CMC is a strong film former, adhesive and agglutinating material, food stabilizer, as well as having excellent liquid absorbent proprieties with potential to be used in wastewater purifying systems. CMC degrades completely which is a characteristic of interest due to the possibility of interacting with contaminates, be removed and reallocated in a safety site. In this work, the degree os sorption of the herbicide atrazine (ATZ) by CMC was evaluted via HPLC (High performance liquid-chromatography). The experimental procedure consisted in identifying the ultra-violet ATZ` absorption band followed by quantitative valuation of ATZ-CMC interaction in function of time. Atrazine (2-chloro-4-ethylamino-6isopropylamino-1,3,5-triazine) (99% purity) was prepared in 30mgLE-1 concentration in deionised water and methanol (1% v/v), and kept in solution with CMC aqueous batch (240gmolE-1 active sites) in moderated stirring for 48 hours. Two typical absorpition peaks, at 260 and 223nm characterize the herbicide U.V. spectrum. For chromatographic analysis was used a Shimadzu Chromatographer CBM-10A system with automatic injection sample volume. The optimum move phase composition was MeOH:H2O (70:30) in 1 mL/min flux. The analyses were carried out in a proportion of 20:1 CMC-ATZ. Concentrations of 12 and 1.5ppm ATZ at 30min. and 48 hours CMC interaction were analysed. The choice of these interaction intervals is based on the previous works carried out by DPP (differential pulse polarography). From the chromatograms , it is seen that the higer intensity peak appears at approximately 4.6 minutes in 223nm. By numerical integration the sorption of ATZ by CMC, related to the initial and final period interaction, showed a reduction of 6.5% of ATZ in 12ppm solution and 3.1% in !.5ppm solution.This wavelength corresponds to the absorbance band of ATZ. The other resulting peaks are related to impurities of the commercial ATZ composition. Although numerically short, these values are significant concerning the low interactivity presented by ATZ molecules. This difference is understood as owing to the CMC-ATZ proportion, i,e., since the volume relation keeps the same, the 1.5ppm, in 20:1 solution is not efficient as 70:1, where in the first the molecules present a higer degree of liberty reducing their interactivity
650 $achromatography
650 $aAtrazina
650 $aCarboximetilcelulose
653 $aATZ
653 $aCMC
653 $aCromatografia liquida
653 $aHigh performance liquid-chromatography
653 $aHLPC
653 $aInstrumentacao
653 $aTecnica
653 $aUltravioleta
700 1 $aFLORES, A. M.
700 1 $aCAMPANA FILHO, S. P.
773 $tIn: SIMPOSIUM LATINOAMERICANO DE POLIMEROS-SLAP 2000, 7.; CONGRESO IBEROAMERICANO DE POLIMEROS, 5.; SIMPOSIUM LATINOAMERICANO DE QUITINA Y QUITOSANA, 1., 2000, La Habana. Livro de resumenes=Livro de resumos=Book of abstracts... La Habana: Sociedad Cubana de Quimica,2000.
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