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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
26/11/1998 |
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Data da última atualização: |
26/11/1998 |
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Autoria: |
SILVA, A. C. P. da; POMMER, C. V.; MAEDA, J. A. |
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Afiliação: |
IAC; CNPq. |
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Título: |
Promocao da germinacao de sementes de videira |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Revista Brasileira de Fruticultura, v.15, n,2, p.79-90, Cruz das Almas,1993. |
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ISSN: |
0100-2945 |
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Idioma: |
Português |
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Conteúdo: |
Sao relatados os resultados de experimentos visando a quebra da dormencia com consequente germinacao de sementes de uva das cultivares Italia e Niagara Rosada. Compararam-se mrtodos usuais para esta especie, como estratificacao, acido giberelico, escarificacao mecanica, escarificacao quimica, agua oxigenada e cianamida hidrogenada. Na cultivar Italia houve resposta satisfatoria ao acido giberelico isolado ou em combinacao com outros tratamentos, resultando em boas porcentagens de germinacao. O uso de cianamida hidrogenada fez anular os efeitos promotores de germinacao causados pelo acido giberelico. As sementes de `NiagaraRosada; nao responderam bem aos mesmos tratamentos aplicados as da `Italia', porem a escarificacao quimica com acido sulfurico concentrado deu bons resultados. |
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Palavras-Chave: |
Grape breeding; Vitis sp. |
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Thesagro: |
Fisiologia; Melhoramento. |
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Thesaurus Nal: |
physiology. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01363naa a2200217 a 4500
001 1635232
005 1998-11-26
008 1993 bl uuuu u00u1 u #d
022 $a0100-2945
100 1 $aSILVA, A. C. P. da
245 $aPromocao da germinacao de sementes de videira
260 $c1993
520 $aSao relatados os resultados de experimentos visando a quebra da dormencia com consequente germinacao de sementes de uva das cultivares Italia e Niagara Rosada. Compararam-se mrtodos usuais para esta especie, como estratificacao, acido giberelico, escarificacao mecanica, escarificacao quimica, agua oxigenada e cianamida hidrogenada. Na cultivar Italia houve resposta satisfatoria ao acido giberelico isolado ou em combinacao com outros tratamentos, resultando em boas porcentagens de germinacao. O uso de cianamida hidrogenada fez anular os efeitos promotores de germinacao causados pelo acido giberelico. As sementes de `NiagaraRosada; nao responderam bem aos mesmos tratamentos aplicados as da `Italia', porem a escarificacao quimica com acido sulfurico concentrado deu bons resultados.
650 $aphysiology
650 $aFisiologia
650 $aMelhoramento
653 $aGrape breeding
653 $aVitis sp
700 1 $aPOMMER, C. V.
700 1 $aMAEDA, J. A.
773 $tRevista Brasileira de Fruticultura$gv.15, n,2, p.79-90, Cruz das Almas,1993.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
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Data corrente: |
24/10/2024 |
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Data da última atualização: |
04/11/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
CORRÊA-FILHO, L. C.; SANTOS JUNIOR, J. R. dos; RAMOS, A. V.; MARTINAZZO, A. P.; HABERT, A. C.; CARVALHO, C. W. P. de; SOARES, A. G.; TONON, R. V.; CABRAL, L. M. C. |
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Afiliação: |
LUIZ CARLOS CORRÊA-FILHO, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; JAILTON RIBEIRO DOS SANTOS JUNIOR, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; ANDRESA VIANA RAMOS, UNIVERSIDADE FEDERAL DO RIO DE JANEIRO; ANA PAULA MARTINAZZO, UNIVERSIDADE FEDERAL FLUMINENSE; ALBERTO CLAUDIO HABERT, UNIVERSIDADE FEDERAL DO RIO DE JANEIRO; CARLOS WANDERLEI PILER DE CARVALHO, CTAA; ANTONIO GOMES SOARES, CTAA; RENATA VALERIANO TONON, CTAA; LOURDES MARIA CORREA CABRAL, CTAA. |
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Título: |
Chitosan-based nanocomposite films with carnauba wax, rosin resin, and zinc oxide nanoparticles. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Food Research International, v. 188, n. 114475, 2024. |
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DOI: |
https://doi.org/10.1016/j.foodres.2024.114475 |
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Idioma: |
Inglês |
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Conteúdo: |
This work aimed to develop edible emulsion-based barriers in the form of chitosan composite films, with a focus on assessing the impacts of carnauba wax, rosin resin, and zinc oxide nanoparticles on their properties. Six films were produced by casting using chitosan as polymer base and glycerol as plasticizer. Acetic acid and polysorbate 80 were also used to facilitate the dissolution and mixing of the components. The six filmogenic solutions contained chitosan at 1.2% w/v, wax or resin content with 0 or 0.6% m/v and ZnO with 0 or 0.05% m/v. The dried films were characterized according to their chemical, barrier, mechanical, thermal and optical properties. All treatments resulted in flexible films. Chitosan films appeared smoother and more uniform under SEM im- aging, while carnauba wax films displayed roughness due to their hydrophobic nature. Wax and resin films were less transparent and water soluble than the chitosan-only films. On the other hand, the addition of ZnO in the formulations increased the solubility of the films. The sorption degree was in line with the solubility results, i.e., films with ZnO presented higher sorption degree and solubility values. All treatments showed low or non-light UV transmission, indicating that the films provide good barrier to UV light. In the visible light region, films of resin with ZnO showed the lowest transmittance values, hence offering a good barrier to visible light. Among the evaluated films, chitosan, and resin films with ZnO nanoparticles were more rigid and resistant to deformation. Overall, films produced with rosin resin and ZnO nanoparticles showed potential improvements in barrier, mechanical, thermal, and optical properties, mainly due to their low water solubility, good UV protection and low permeability to water vapor and oxygen, which are suitable for using in formulations, intended to produce edible films and coatings. MenosThis work aimed to develop edible emulsion-based barriers in the form of chitosan composite films, with a focus on assessing the impacts of carnauba wax, rosin resin, and zinc oxide nanoparticles on their properties. Six films were produced by casting using chitosan as polymer base and glycerol as plasticizer. Acetic acid and polysorbate 80 were also used to facilitate the dissolution and mixing of the components. The six filmogenic solutions contained chitosan at 1.2% w/v, wax or resin content with 0 or 0.6% m/v and ZnO with 0 or 0.05% m/v. The dried films were characterized according to their chemical, barrier, mechanical, thermal and optical properties. All treatments resulted in flexible films. Chitosan films appeared smoother and more uniform under SEM im- aging, while carnauba wax films displayed roughness due to their hydrophobic nature. Wax and resin films were less transparent and water soluble than the chitosan-only films. On the other hand, the addition of ZnO in the formulations increased the solubility of the films. The sorption degree was in line with the solubility results, i.e., films with ZnO presented higher sorption degree and solubility values. All treatments showed low or non-light UV transmission, indicating that the films provide good barrier to UV light. In the visible light region, films of resin with ZnO showed the lowest transmittance values, hence offering a good barrier to visible light. Among the evaluated films, chitosan, and resin films with Z... Mostrar Tudo |
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Palavras-Chave: |
Active packaging; Barrier properties; Biodegradable films; Polímeros; Propriedades mecânicas. |
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Thesagro: |
Biofilme; Embalagem; Material Biodegradável; Tecnologia de Alimento. |
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Thesaurus NAL: |
Biodegradable products; Food packaging; Mechanical properties; Packaging films; Polymers. |
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Categoria do assunto: |
Q Alimentos e Nutrição Humana |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/1168442/1/Food-Research-International-2024.pdf
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Marc: |
LEADER 03113naa a2200397 a 4500
001 2168442
005 2024-11-04
008 2024 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.foodres.2024.114475$2DOI
100 1 $aCORRÊA-FILHO, L. C.
245 $aChitosan-based nanocomposite films with carnauba wax, rosin resin, and zinc oxide nanoparticles.$h[electronic resource]
260 $c2024
520 $aThis work aimed to develop edible emulsion-based barriers in the form of chitosan composite films, with a focus on assessing the impacts of carnauba wax, rosin resin, and zinc oxide nanoparticles on their properties. Six films were produced by casting using chitosan as polymer base and glycerol as plasticizer. Acetic acid and polysorbate 80 were also used to facilitate the dissolution and mixing of the components. The six filmogenic solutions contained chitosan at 1.2% w/v, wax or resin content with 0 or 0.6% m/v and ZnO with 0 or 0.05% m/v. The dried films were characterized according to their chemical, barrier, mechanical, thermal and optical properties. All treatments resulted in flexible films. Chitosan films appeared smoother and more uniform under SEM im- aging, while carnauba wax films displayed roughness due to their hydrophobic nature. Wax and resin films were less transparent and water soluble than the chitosan-only films. On the other hand, the addition of ZnO in the formulations increased the solubility of the films. The sorption degree was in line with the solubility results, i.e., films with ZnO presented higher sorption degree and solubility values. All treatments showed low or non-light UV transmission, indicating that the films provide good barrier to UV light. In the visible light region, films of resin with ZnO showed the lowest transmittance values, hence offering a good barrier to visible light. Among the evaluated films, chitosan, and resin films with ZnO nanoparticles were more rigid and resistant to deformation. Overall, films produced with rosin resin and ZnO nanoparticles showed potential improvements in barrier, mechanical, thermal, and optical properties, mainly due to their low water solubility, good UV protection and low permeability to water vapor and oxygen, which are suitable for using in formulations, intended to produce edible films and coatings.
650 $aBiodegradable products
650 $aFood packaging
650 $aMechanical properties
650 $aPackaging films
650 $aPolymers
650 $aBiofilme
650 $aEmbalagem
650 $aMaterial Biodegradável
650 $aTecnologia de Alimento
653 $aActive packaging
653 $aBarrier properties
653 $aBiodegradable films
653 $aPolímeros
653 $aPropriedades mecânicas
700 1 $aSANTOS JUNIOR, J. R. dos
700 1 $aRAMOS, A. V.
700 1 $aMARTINAZZO, A. P.
700 1 $aHABERT, A. C.
700 1 $aCARVALHO, C. W. P. de
700 1 $aSOARES, A. G.
700 1 $aTONON, R. V.
700 1 $aCABRAL, L. M. C.
773 $tFood Research International$gv. 188, n. 114475, 2024.
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Embrapa Agroindústria de Alimentos (CTAA) |
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