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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
05/07/1993 |
Data da última atualização: |
05/07/1993 |
Autoria: |
AVILA, I. G. de; STEIN, D. P.; C. FILHO, C.; SANTOS, M. T. N. dos; FERREIRA, J. M. C.; LEITE, C. A. G.; PRANDINI, F. L. |
Título: |
Uso e ocupação do solo no alto Paraíba II: sua influência nos processos de escorregamento, erosão e assoreamento. |
Ano de publicação: |
1982 |
Fonte/Imprenta: |
Silvicultura em São Paulo, São Paulo, v. 16-A, pt. 3, p. 1936-1942, 1982. |
ISSN: |
0583-3132 |
Idioma: |
Português |
Notas: |
Edição dos Anais do Congresso Nacional sobre Essências Nativas, 1982, Campos do Jordão. |
Conteúdo: |
Formas de uso e ocupacao do solo sao diretamente responsaveis por alteracoes nas condicoes naturais de evolucao do meio-fisico. Tais alteracoes podem provocar o desencadeamento ou imprimir mais rapidez aos processos erosivos naturais, colocando em risco obras publicas e assentamentos humanos, diminuindo areas de pastagens e de agricultura, como tambem causando serios problemas de assoreamento a baixadas naturais e lagos artificiais. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01183naa a2200217 a 4500 001 1287110 005 1993-07-05 008 1982 bl uuuu u00u1 u #d 022 $a0583-3132 100 1 $aAVILA, I. G. de 245 $aUso e ocupação do solo no alto Paraíba II$bsua influência nos processos de escorregamento, erosão e assoreamento. 260 $c1982 500 $aEdição dos Anais do Congresso Nacional sobre Essências Nativas, 1982, Campos do Jordão. 520 $aFormas de uso e ocupacao do solo sao diretamente responsaveis por alteracoes nas condicoes naturais de evolucao do meio-fisico. Tais alteracoes podem provocar o desencadeamento ou imprimir mais rapidez aos processos erosivos naturais, colocando em risco obras publicas e assentamentos humanos, diminuindo areas de pastagens e de agricultura, como tambem causando serios problemas de assoreamento a baixadas naturais e lagos artificiais. 700 1 $aSTEIN, D. P. 700 1 $aC. FILHO, C. 700 1 $aSANTOS, M. T. N. dos 700 1 $aFERREIRA, J. M. C. 700 1 $aLEITE, C. A. G. 700 1 $aPRANDINI, F. L. 773 $tSilvicultura em São Paulo, São Paulo$gv. 16-A, pt. 3, p. 1936-1942, 1982.
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Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Agroindústria de Alimentos. Para informações adicionais entre em contato com ctaa.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Agroindústria de Alimentos; Embrapa Instrumentação. |
Data corrente: |
18/01/2021 |
Data da última atualização: |
25/05/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
LIMA, E. M. B.; MIDDEA, A.; NEUMANN, R.; THIRÉ, R. M. da S. M.; PEREIRA, J. F.; FREITAS, S. C. de; STEPHAN, M. P.; LIMA, A. M.; MINGUITA, A. P. da S.; MATTOS, M. da C.; TEIXEIRA, A. da S.; PEREIRA, I. C. S.; SANTOS, N. R. R. dos; MARCONCINI, J. M.; OLIVEIRA, R. N.; CORREA, A. C. |
Afiliação: |
EDLA MARIA BEZERRA LIMA, CTAA; Antonieta Middea, CETEM; Reiner Neumann, CETEM; Rossana Mara da Silva Moreira Thiré, UFRJ; Jéssica Fernandes Pereira; SIDINEA CORDEIRO DE FREITAS, CTAA; MARILIA PENTEADO STEPHAN, CTAA; Aline Muniz Lima; ADRIANA PAULA DA SILVA MINGUITA, CTAA; MARIANA DA COSTA MATTOS, CTAA; ALESSANDRA DA SILVA TEIXEIRA, CTAA; Ingrid Cristina Soares Pereira; Natália Rodrigues Rojas dos Santos; José Manoel Marconcini; Renata Nunes Oliveira, UFRRJ; Ana Carolina Correa, UFSCar. |
Título: |
Biocomposites of PLA and Mango Seed Waste: Potential Material for Food Packaging and a Technological Alternative to Reduce Environmental Impact. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Starch, v. 73, n. 5/6, e2000118, 2021. |
DOI: |
https://doi.org/10.1002/star.202000118 |
Idioma: |
Inglês |
Conteúdo: |
Mango seeds from agro-industry represents an environmental problem due to the amounts of by-products produced. Conversely, poly (lactic acid) (PLA) is a potential green alternative to conventional plastics. The goal of this study aimed to develop a biocomposite based on PLA and mango's by?product for rigid packaging. Six biocomposites were obtained by extrusion/injection processing using formulations with PLA as a matrix and up to 20% by weight of mango seed's by-products (integument or/and kernel). The materials were characterized by chemical analysis; helium pycnometry; particle size distribution; scanning electron microscopy/energy dispersive X-Ray (SEM/EDX), X-Ray diffraction (XRD); Fourier transform infrared spectroscopy (FTIR); thermal gravimetric analysis/differential thermogravimetry (TGA/DTG); differential scanning calorimetry (DSC), and mechanical analysis. Fourier Transform Infrared Spectroscopy (FTIR) bands and DSC transitions related to starch were higher in the kernel, while more cellulose bands were found in the integument. Kernel presented thermal degradation in the biocomposites, specifically the sample PLA+20 wt% kernel. For the other compositions, it was possible to observe that they could keep their morphology. Significant improvements in both mechanical and barrier properties were found in the formulation with 20 wt% integument (an increase of up to 38% in elastic modulus). Therefore, this study suggests that biocomposites developed from PLA / Integument / Kernel have potential as a new biomaterial for rigid food packaging systems. MenosMango seeds from agro-industry represents an environmental problem due to the amounts of by-products produced. Conversely, poly (lactic acid) (PLA) is a potential green alternative to conventional plastics. The goal of this study aimed to develop a biocomposite based on PLA and mango's by?product for rigid packaging. Six biocomposites were obtained by extrusion/injection processing using formulations with PLA as a matrix and up to 20% by weight of mango seed's by-products (integument or/and kernel). The materials were characterized by chemical analysis; helium pycnometry; particle size distribution; scanning electron microscopy/energy dispersive X-Ray (SEM/EDX), X-Ray diffraction (XRD); Fourier transform infrared spectroscopy (FTIR); thermal gravimetric analysis/differential thermogravimetry (TGA/DTG); differential scanning calorimetry (DSC), and mechanical analysis. Fourier Transform Infrared Spectroscopy (FTIR) bands and DSC transitions related to starch were higher in the kernel, while more cellulose bands were found in the integument. Kernel presented thermal degradation in the biocomposites, specifically the sample PLA+20 wt% kernel. For the other compositions, it was possible to observe that they could keep their morphology. Significant improvements in both mechanical and barrier properties were found in the formulation with 20 wt% integument (an increase of up to 38% in elastic modulus). Therefore, this study suggests that biocomposites developed from PLA / Integument... Mostrar Tudo |
Palavras-Chave: |
Biomaterials; Mango; PLA. |
Thesaurus NAL: |
Extrusion. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 02656naa a2200361 a 4500 001 2129433 005 2022-05-25 008 2021 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1002/star.202000118$2DOI 100 1 $aLIMA, E. M. B. 245 $aBiocomposites of PLA and Mango Seed Waste$bPotential Material for Food Packaging and a Technological Alternative to Reduce Environmental Impact.$h[electronic resource] 260 $c2021 520 $aMango seeds from agro-industry represents an environmental problem due to the amounts of by-products produced. Conversely, poly (lactic acid) (PLA) is a potential green alternative to conventional plastics. The goal of this study aimed to develop a biocomposite based on PLA and mango's by?product for rigid packaging. Six biocomposites were obtained by extrusion/injection processing using formulations with PLA as a matrix and up to 20% by weight of mango seed's by-products (integument or/and kernel). The materials were characterized by chemical analysis; helium pycnometry; particle size distribution; scanning electron microscopy/energy dispersive X-Ray (SEM/EDX), X-Ray diffraction (XRD); Fourier transform infrared spectroscopy (FTIR); thermal gravimetric analysis/differential thermogravimetry (TGA/DTG); differential scanning calorimetry (DSC), and mechanical analysis. Fourier Transform Infrared Spectroscopy (FTIR) bands and DSC transitions related to starch were higher in the kernel, while more cellulose bands were found in the integument. Kernel presented thermal degradation in the biocomposites, specifically the sample PLA+20 wt% kernel. For the other compositions, it was possible to observe that they could keep their morphology. Significant improvements in both mechanical and barrier properties were found in the formulation with 20 wt% integument (an increase of up to 38% in elastic modulus). Therefore, this study suggests that biocomposites developed from PLA / Integument / Kernel have potential as a new biomaterial for rigid food packaging systems. 650 $aExtrusion 653 $aBiomaterials 653 $aMango 653 $aPLA 700 1 $aMIDDEA, A. 700 1 $aNEUMANN, R. 700 1 $aTHIRÉ, R. M. da S. M. 700 1 $aPEREIRA, J. F. 700 1 $aFREITAS, S. C. de 700 1 $aSTEPHAN, M. P. 700 1 $aLIMA, A. M. 700 1 $aMINGUITA, A. P. da S. 700 1 $aMATTOS, M. da C. 700 1 $aTEIXEIRA, A. da S. 700 1 $aPEREIRA, I. C. S. 700 1 $aSANTOS, N. R. R. dos 700 1 $aMARCONCINI, J. M. 700 1 $aOLIVEIRA, R. N. 700 1 $aCORREA, A. C. 773 $tStarch$gv. 73, n. 5/6, e2000118, 2021.
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