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Registro Completo |
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
09/09/1992 |
Data da última atualização: |
30/07/2004 |
Autoria: |
ITO, E. Y.; RODRIGUES, J. H. F.; RUELLA, A.; OTANI, C. M.; SOUZA, F. R.; SHIBUYA, Y. |
Título: |
Teste de utilizacao de gesso. |
Ano de publicação: |
1987 |
Fonte/Imprenta: |
In: CONGRESSO DE DIFUSAO DE TECNOLOGIA EM GRANDES CULTURAS, 3., 1987, Itapecirica da Serra. [Anais]. [S.l.]: Cooperativa Agricola de Cotia/Cooperativa Central, [1987?]. |
Volume: |
v.2 |
Páginas: |
p.437-438. |
Idioma: |
Português |
Conteúdo: |
Deficiencia de enxofre e respostas as aplicacoes de fertilizantes que contem este nutriente tem sido relatados para varias culturas. Deficiencias naturais de enxofre nos solos de cerrado estao associados a queima frequente dessas areas, e o problema tende a se agravar com o cultivo intensivo por varios anos e o uso cada vez maior de mistura de fertilizantes de alta concentracao que nao possuem enxofre na sua composicao. O ion sulfato tem a propriedade de carregar cations basicos para as camadas subsuperficiais, como por exemplo o potassio que em solos arenosos, essa profundidade de carreamento pode ser prejudicial se nao estiverem ao alcance das raizes da cultura. Essa profundidade esta relacionada tambem com a intensidade das chuvas. Para verificar o efeito do gesso, foi montado este ensaio em area comercial. |
Palavras-Chave: |
Bahia; Brasil; Fertilization; Soybean. |
Thesagro: |
Adubação; Cerrado; Gesso; Soja. |
Thesaurus Nal: |
Brazil; gypsum; savannas. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01703naa a2200337 a 4500 001 1453222 005 2004-07-30 008 1987 bl uuuu u00u1 u #d 100 1 $aITO, E. Y. 245 $aTeste de utilizacao de gesso. 260 $c1987 300 $ap.437-438. v.2 490 $vv.2 520 $aDeficiencia de enxofre e respostas as aplicacoes de fertilizantes que contem este nutriente tem sido relatados para varias culturas. Deficiencias naturais de enxofre nos solos de cerrado estao associados a queima frequente dessas areas, e o problema tende a se agravar com o cultivo intensivo por varios anos e o uso cada vez maior de mistura de fertilizantes de alta concentracao que nao possuem enxofre na sua composicao. O ion sulfato tem a propriedade de carregar cations basicos para as camadas subsuperficiais, como por exemplo o potassio que em solos arenosos, essa profundidade de carreamento pode ser prejudicial se nao estiverem ao alcance das raizes da cultura. Essa profundidade esta relacionada tambem com a intensidade das chuvas. Para verificar o efeito do gesso, foi montado este ensaio em area comercial. 650 $aBrazil 650 $agypsum 650 $asavannas 650 $aAdubação 650 $aCerrado 650 $aGesso 650 $aSoja 653 $aBahia 653 $aBrasil 653 $aFertilization 653 $aSoybean 700 1 $aRODRIGUES, J. H. F. 700 1 $aRUELLA, A. 700 1 $aOTANI, C. M. 700 1 $aSOUZA, F. R. 700 1 $aSHIBUYA, Y. 773 $tIn: CONGRESSO DE DIFUSAO DE TECNOLOGIA EM GRANDES CULTURAS, 3., 1987, Itapecirica da Serra. [Anais]. [S.l.]: Cooperativa Agricola de Cotia/Cooperativa Central, [1987?].
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Registro Completo
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
28/08/2019 |
Data da última atualização: |
03/10/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
LIMA, G. G. de; ELTER, J. K.; CHEE, B. S.; MAGALHAES, W. L. E.; DEVINE, D. M.; NUGENT, M. J. D.; SÁ, M. J. C. de. |
Afiliação: |
Gabriel Goetten de Lima, Materials Research Institute, Athlone Institute of Technology; Johanna Katrin Elter, Materials Research Institute, Athlone Institute of Technology; Bor Shin Chee, Materials Research Institute, Athlone Institute of Technology; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Declan M. Devine, Materials Research Institute, Athlone Institute of Technology; Michael J. D. Nugent, Materials Research Institute, Athlone Institute of Technology; Marcelo J. C. de Sá, Materials Research Institute, Athlone Institute of Technology. |
Título: |
A tough and novel dual-response PAA/P(NiPAAM-co-PEGDMA) IPN hydrogels with ceramics by photopolymerization for consolidation of bone fragments following fracture. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Biomedical Materials, v. 14, n. 5, Sept. 2019. 14 p. |
DOI: |
10.1088/1748-605X/ab2fa3 |
Idioma: |
Inglês |
Conteúdo: |
In this work, a novel dual-response hydrogel for enhanced bone repair following multiple fractures was investigated. The conventional treatment of multiple bone fracture consists on removing smaller bone fragments from the body in a surgery, followed by the fixation of the bone using screws and plates. This work proposes an alternative for this treatment via in situ UV-initiated radical polymerization of a novel IPN hydrogel composed of PAA/P(NiPAAM-co-PEGDMA)incorporated with ceramic additives. The influence of different additives on mechanical properties and sensitivity of the polymer, as well as the prepolymer mixture, were investigated in order to analyse the suitability of the composites for bone healing applications. This material exhibited an interpenetrating network, confirmed by FTIR, with ceramics particles dispersed in between the polymer network. These structures presented high strength by tensile tests, sensitivity to pH and temperature and a decrease on Tg values of NiPAAm depending on the amount of PEGDMA and ceramics added; although, the addition of ceramics to these composites did not decrease their stability drastically. Finally, cytotoxicity tests revealed variations on the toxicity, whereas the addition of TCP presented to be nontoxic and that the cell viability increased when ceramics additives were incorporated into the polymeric matrix with an increased reporter activity of NF-κB, associated with aiding fibroblast adhesion. Hence, it was possible to optimise feedstock ratios to increase the applicability of the prepolymer mixture as a potential treatment of multiple fractures. MenosIn this work, a novel dual-response hydrogel for enhanced bone repair following multiple fractures was investigated. The conventional treatment of multiple bone fracture consists on removing smaller bone fragments from the body in a surgery, followed by the fixation of the bone using screws and plates. This work proposes an alternative for this treatment via in situ UV-initiated radical polymerization of a novel IPN hydrogel composed of PAA/P(NiPAAM-co-PEGDMA)incorporated with ceramic additives. The influence of different additives on mechanical properties and sensitivity of the polymer, as well as the prepolymer mixture, were investigated in order to analyse the suitability of the composites for bone healing applications. This material exhibited an interpenetrating network, confirmed by FTIR, with ceramics particles dispersed in between the polymer network. These structures presented high strength by tensile tests, sensitivity to pH and temperature and a decrease on Tg values of NiPAAm depending on the amount of PEGDMA and ceramics added; although, the addition of ceramics to these composites did not decrease their stability drastically. Finally, cytotoxicity tests revealed variations on the toxicity, whereas the addition of TCP presented to be nontoxic and that the cell viability increased when ceramics additives were incorporated into the polymeric matrix with an increased reporter activity of NF-κB, associated with aiding fibroblast adhesion. Hence, it was possible ... Mostrar Tudo |
Palavras-Chave: |
Composite biomaterials; Multiple bone fragment surgery; Trauma. |
Thesagro: |
Fratura; Osso. |
Thesaurus NAL: |
Bone fractures. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 02513naa a2200277 a 4500 001 2111696 005 2019-10-03 008 2019 bl uuuu u00u1 u #d 024 7 $a10.1088/1748-605X/ab2fa3$2DOI 100 1 $aLIMA, G. G. de 245 $aA tough and novel dual-response PAA/P(NiPAAM-co-PEGDMA) IPN hydrogels with ceramics by photopolymerization for consolidation of bone fragments following fracture.$h[electronic resource] 260 $c2019 520 $aIn this work, a novel dual-response hydrogel for enhanced bone repair following multiple fractures was investigated. The conventional treatment of multiple bone fracture consists on removing smaller bone fragments from the body in a surgery, followed by the fixation of the bone using screws and plates. This work proposes an alternative for this treatment via in situ UV-initiated radical polymerization of a novel IPN hydrogel composed of PAA/P(NiPAAM-co-PEGDMA)incorporated with ceramic additives. The influence of different additives on mechanical properties and sensitivity of the polymer, as well as the prepolymer mixture, were investigated in order to analyse the suitability of the composites for bone healing applications. This material exhibited an interpenetrating network, confirmed by FTIR, with ceramics particles dispersed in between the polymer network. These structures presented high strength by tensile tests, sensitivity to pH and temperature and a decrease on Tg values of NiPAAm depending on the amount of PEGDMA and ceramics added; although, the addition of ceramics to these composites did not decrease their stability drastically. Finally, cytotoxicity tests revealed variations on the toxicity, whereas the addition of TCP presented to be nontoxic and that the cell viability increased when ceramics additives were incorporated into the polymeric matrix with an increased reporter activity of NF-κB, associated with aiding fibroblast adhesion. Hence, it was possible to optimise feedstock ratios to increase the applicability of the prepolymer mixture as a potential treatment of multiple fractures. 650 $aBone fractures 650 $aFratura 650 $aOsso 653 $aComposite biomaterials 653 $aMultiple bone fragment surgery 653 $aTrauma 700 1 $aELTER, J. K. 700 1 $aCHEE, B. S. 700 1 $aMAGALHAES, W. L. E. 700 1 $aDEVINE, D. M. 700 1 $aNUGENT, M. J. D. 700 1 $aSÁ, M. J. C. de 773 $tBiomedical Materials$gv. 14, n. 5, Sept. 2019. 14 p.
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