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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
01/07/2010 |
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Data da última atualização: |
18/05/2021 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SOARES, F. S. C.; BERNARDI, A. C. de C.; NOGUEIRA, A. R. de A. |
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Afiliação: |
UFSCar-SAO CARLOS, SP; ALBERTO CARLOS DE CAMPOS BERNARDI, CPPSE; ANA RITA DE ARAUJO NOGUEIRA, CPPSE. |
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Título: |
Characterization of three natural zeolites. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE ON FOOD AND AGRICULTURE APPLICATIONS OF NANOTECHNOLOGIES, 2010, São pedro, São Pedro: Aptor Software, 2010. |
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Páginas: |
p. 179 |
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Idioma: |
Português |
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Conteúdo: |
In recent years, great attention has been paid to the application of nano structure materials. Since zeolites have primary particles with at least one dimension in the nanometer scale, they may be regarded as nanomaterials of geological and pedological origins. Zeolites are hydrated aluminosilicates, crystalline, with a wide variety of technological applications. Its structure consists of a skeleton with three-dimensional tetrahedral of AlO4 and SiO4, linked via oxygen atoms, and having channels and cavities in which it is possible to settle ions, water molecules or other adsorbates and salts. The Si and Al are at the center of the tetrahedron, the structural frame includes cavities occupied by relatively large sizes cations (Na+, K+, Ca2+, Mg2+) and water molecules, both having considerable freedom of movement, allowing ion exchange and reversible dehydration. High degree of hydration, low density, stability of the crystal structure, cation exchange properties, electrical conductivity, adsorption of gases and catalytic properties are the main properties of zeolites. About forty species of natural zeolites have been identified and over one hundred and fifty species have been synthesized. The synthetic zeolites have a high degree of purity and are widely used as catalysts for the petrochemical industry. In contrast, natural zeolites, have lower purity, and are easily found on the market, being used for a wide range of purposes. Treatment of industrial effluents, waste water purification, treatment of saline soils and supplementation in the diet of animals are examples of applications of commercial products made from natural zeolites derived from mines located in different regions of the world. Due to their technological applications and physicochemical properties, zeolites have been investigated owing their mineral identification and characterization. Aiming to obtaining the physical and chemical properties, three samples of natural zeolites were evaluated. Their main composition were respectively heulandites/clinoptilolite; clinoptilolite; and stilbite. For this purpose, we determined the particle size distribution, degree of hydration, the superficial area, by BET method, the assessment of the crystalline state by using micrography, the analysis of mineralogical composition by X-rays diffraction technique, and the chemical composition of natural zeolites by using inductively coupled plasma optical spectrometry. MenosIn recent years, great attention has been paid to the application of nano structure materials. Since zeolites have primary particles with at least one dimension in the nanometer scale, they may be regarded as nanomaterials of geological and pedological origins. Zeolites are hydrated aluminosilicates, crystalline, with a wide variety of technological applications. Its structure consists of a skeleton with three-dimensional tetrahedral of AlO4 and SiO4, linked via oxygen atoms, and having channels and cavities in which it is possible to settle ions, water molecules or other adsorbates and salts. The Si and Al are at the center of the tetrahedron, the structural frame includes cavities occupied by relatively large sizes cations (Na+, K+, Ca2+, Mg2+) and water molecules, both having considerable freedom of movement, allowing ion exchange and reversible dehydration. High degree of hydration, low density, stability of the crystal structure, cation exchange properties, electrical conductivity, adsorption of gases and catalytic properties are the main properties of zeolites. About forty species of natural zeolites have been identified and over one hundred and fifty species have been synthesized. The synthetic zeolites have a high degree of purity and are widely used as catalysts for the petrochemical industry. In contrast, natural zeolites, have lower purity, and are easily found on the market, being used for a wide range of purposes. Treatment of industrial effluents, waste water p... Mostrar Tudo |
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Palavras-Chave: |
Fonte natural; Zeolita. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/37810/1/PROCI-2010.00009.pdf
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Marc: |
LEADER 03017nam a2200169 a 4500
001 1856610
005 2021-05-18
008 2010 bl uuuu u00u1 u #d
100 1 $aSOARES, F. S. C.
245 $aCharacterization of three natural zeolites.$h[electronic resource]
260 $aIn: INTERNATIONAL CONFERENCE ON FOOD AND AGRICULTURE APPLICATIONS OF NANOTECHNOLOGIES, 2010, São pedro, São Pedro: Aptor Software$c2010
300 $ap. 179
520 $aIn recent years, great attention has been paid to the application of nano structure materials. Since zeolites have primary particles with at least one dimension in the nanometer scale, they may be regarded as nanomaterials of geological and pedological origins. Zeolites are hydrated aluminosilicates, crystalline, with a wide variety of technological applications. Its structure consists of a skeleton with three-dimensional tetrahedral of AlO4 and SiO4, linked via oxygen atoms, and having channels and cavities in which it is possible to settle ions, water molecules or other adsorbates and salts. The Si and Al are at the center of the tetrahedron, the structural frame includes cavities occupied by relatively large sizes cations (Na+, K+, Ca2+, Mg2+) and water molecules, both having considerable freedom of movement, allowing ion exchange and reversible dehydration. High degree of hydration, low density, stability of the crystal structure, cation exchange properties, electrical conductivity, adsorption of gases and catalytic properties are the main properties of zeolites. About forty species of natural zeolites have been identified and over one hundred and fifty species have been synthesized. The synthetic zeolites have a high degree of purity and are widely used as catalysts for the petrochemical industry. In contrast, natural zeolites, have lower purity, and are easily found on the market, being used for a wide range of purposes. Treatment of industrial effluents, waste water purification, treatment of saline soils and supplementation in the diet of animals are examples of applications of commercial products made from natural zeolites derived from mines located in different regions of the world. Due to their technological applications and physicochemical properties, zeolites have been investigated owing their mineral identification and characterization. Aiming to obtaining the physical and chemical properties, three samples of natural zeolites were evaluated. Their main composition were respectively heulandites/clinoptilolite; clinoptilolite; and stilbite. For this purpose, we determined the particle size distribution, degree of hydration, the superficial area, by BET method, the assessment of the crystalline state by using micrography, the analysis of mineralogical composition by X-rays diffraction technique, and the chemical composition of natural zeolites by using inductively coupled plasma optical spectrometry.
653 $aFonte natural
653 $aZeolita
700 1 $aBERNARDI, A. C. de C.
700 1 $aNOGUEIRA, A. R. de A.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
02/07/2013 |
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Data da última atualização: |
14/06/2017 |
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Autoria: |
NORNBERG, S. D.; NAVA, D. E.; GRUTZMACHER, A. D.; BENTO, J. M. S.; OZELAME, A. L.; HUBNER, L. K. |
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Afiliação: |
SANDRO DANIEL NORNBERG, UNIVERSIDADE FEDERAL DE PELOTAS; DORI EDSON NAVA, Embrapa Clima Temperado; ANDERSON DIONEI GRUTZMACHER, UNIVERSIDADE FEDERAL DE PELOTAS; JOSÉ MAURÍCIO SIMÕES BENTO, UNIVERSIDADE DE SÃO PAULO; ÂNGELO LUIS OZELAME, UNIVERSIDADE FEDERAL DE PELOTAS; LUCAS KUHN HUBNER, UNIVERSIDADE FEDERAL DE PELOTAS. |
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Título: |
Flutuação populacional e distribuição de Stiophilus zeamais em pomares de pessegueiro e macieira. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 48, n. 4, p. 358-364, abr. 2013. |
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Idioma: |
Português |
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Notas: |
Título em inglês: Population dynamics and distribution of Sitophilus zeamais in peach and apple orchards. |
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Conteúdo: |
O objetivo deste trabalho foi avaliar a flutuação populacional de Sitophilus zeamais (Coleoptera: Curculionidae) e determinar a distribuição deste inseto‑praga nas plantas de pessegueiro e macieira na região de Pelotas, no Rio Grande do Sul. A flutuação opulacional foi avaliada nas safras 2009/2010 e 2010/2011, por meio de monitoramento semanal com armadilhas dos pomares, durante aproximadamente cinco meses. Foram usadas dez armadilhas do tipo Pet‑milho por hectare, posicionadas a 1,7 m do solo, distribuídas de maneira equidistante nas bordas e no centro do pomar. A distribuição do inseto nas plantas foi avaliada nos frutos dos terços superior, mediano e inferior das plantas, na cultivar de maçã Eva e nas cultivares de pêssego Sensação (ciclo precoce), Eldorado (ciclo tardio) e Eragil (ciclo tardio). Em macieira, o ataque de S. zeamais ocorreu por cinco a sete semanas, e, em pessegueiro, por três a quatro semanas. Foi observado maior número de S. zeamais machos no início da infestação dos pomares, principalmente nos frutos do terço superior das plantas. Nas semanas seguintes, a maior infestação de frutos se deu no terço médio. O ataque de Sitophilus zeamais ocorre tanto em cultivares precoces como em tardias de pessegueiro, com pico de ataque no período de colheita. |
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Palavras-Chave: |
Control timing; Época de controle; Gorgulho-do-milho; Monitoramento. |
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Thesagro: |
Malus Domestica; Prunus Persica; Sitophilus Zeamais. |
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Thesaurus NAL: |
Monitoring. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/85263/1/Flutuacao-populacional.pdf
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Marc: |
LEADER 02272naa a2200289 a 4500
001 1961128
005 2017-06-14
008 2013 bl uuuu u00u1 u #d
100 1 $aNORNBERG, S. D.
245 $aFlutuação populacional e distribuição de Stiophilus zeamais em pomares de pessegueiro e macieira.
260 $c2013
500 $aTítulo em inglês: Population dynamics and distribution of Sitophilus zeamais in peach and apple orchards.
520 $aO objetivo deste trabalho foi avaliar a flutuação populacional de Sitophilus zeamais (Coleoptera: Curculionidae) e determinar a distribuição deste inseto‑praga nas plantas de pessegueiro e macieira na região de Pelotas, no Rio Grande do Sul. A flutuação opulacional foi avaliada nas safras 2009/2010 e 2010/2011, por meio de monitoramento semanal com armadilhas dos pomares, durante aproximadamente cinco meses. Foram usadas dez armadilhas do tipo Pet‑milho por hectare, posicionadas a 1,7 m do solo, distribuídas de maneira equidistante nas bordas e no centro do pomar. A distribuição do inseto nas plantas foi avaliada nos frutos dos terços superior, mediano e inferior das plantas, na cultivar de maçã Eva e nas cultivares de pêssego Sensação (ciclo precoce), Eldorado (ciclo tardio) e Eragil (ciclo tardio). Em macieira, o ataque de S. zeamais ocorreu por cinco a sete semanas, e, em pessegueiro, por três a quatro semanas. Foi observado maior número de S. zeamais machos no início da infestação dos pomares, principalmente nos frutos do terço superior das plantas. Nas semanas seguintes, a maior infestação de frutos se deu no terço médio. O ataque de Sitophilus zeamais ocorre tanto em cultivares precoces como em tardias de pessegueiro, com pico de ataque no período de colheita.
650 $aMonitoring
650 $aMalus Domestica
650 $aPrunus Persica
650 $aSitophilus Zeamais
653 $aControl timing
653 $aÉpoca de controle
653 $aGorgulho-do-milho
653 $aMonitoramento
700 1 $aNAVA, D. E.
700 1 $aGRUTZMACHER, A. D.
700 1 $aBENTO, J. M. S.
700 1 $aOZELAME, A. L.
700 1 $aHUBNER, L. K.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 48, n. 4, p. 358-364, abr. 2013.
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