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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
22/03/2005 |
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Data da última atualização: |
22/03/2005 |
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Autoria: |
RAJPUT, R.; SHARMA, D. N. |
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Título: |
Micromorphology of the uterus of gaddi sheep during reproduction and senility. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Indian Veterinary Medical Journal, v. 23, n. 3, p. 209-214, 1999. |
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Idioma: |
Inglês |
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Conteúdo: |
Detailed histologicaI and micrometrical observations were recorded on the corpus and cornuae of the uteri obtained from 14 adults (5 luteal, 5 follicular and 4 senile) Gaddi sheep. The endo-myo and perimetria showed generalised hypotrophy during the senility. The endometrial epithelium and the glands were best developed in the follicular phase. Unlike other animais the chromatophores and the elastic elements were not observed in the Gaddi sheep uteri. Cytomorphological and fibroarchitecturaI changes in the uteri have been discussed in light of hormonaI circulations during various phases of reproduction and senility in sheep. |
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Palavras-Chave: |
Morfometria. |
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Thesagro: |
Anatomia; Envelhecimento; Morfologia Animal; Ovino; Reprodução Animal; Útero. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01225naa a2200217 a 4500
001 1530534
005 2005-03-22
008 1999 bl uuuu u00u1 u #d
100 1 $aRAJPUT, R.
245 $aMicromorphology of the uterus of gaddi sheep during reproduction and senility.
260 $c1999
520 $aDetailed histologicaI and micrometrical observations were recorded on the corpus and cornuae of the uteri obtained from 14 adults (5 luteal, 5 follicular and 4 senile) Gaddi sheep. The endo-myo and perimetria showed generalised hypotrophy during the senility. The endometrial epithelium and the glands were best developed in the follicular phase. Unlike other animais the chromatophores and the elastic elements were not observed in the Gaddi sheep uteri. Cytomorphological and fibroarchitecturaI changes in the uteri have been discussed in light of hormonaI circulations during various phases of reproduction and senility in sheep.
650 $aAnatomia
650 $aEnvelhecimento
650 $aMorfologia Animal
650 $aOvino
650 $aReprodução Animal
650 $aÚtero
653 $aMorfometria
700 1 $aSHARMA, D. N.
773 $tIndian Veterinary Medical Journal$gv. 23, n. 3, p. 209-214, 1999.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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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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