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Registro Completo |
Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
Data corrente: |
22/03/2024 |
Data da última atualização: |
25/03/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
LIMA, E. M. B.; MIDDEA, A.; REIS, F. S.; MATEUS, D. N.; AMORIM, R. G. DE; PEREIRA, I. C. S.; MATTOS, M. da C.; MINGUITA, A. P. da S.; ANJOS, M. R. dos; NEUMANN, R.; OLIVEIRA, R. N.; TAVARES, M. I. B. |
Afiliação: |
EDLA MARIA BEZERRA LIMA, CTAA; ANTONIETA MIDDEA, CETEM; FÁBIO SILVEIRA REIS, UFRRJ; DÉBORA NASCIMENTO MATEUS, UEZO; RODRIGO GOMES DE AMORIM, UFRRJ; INGRID CRISTINA SOARES PEREIRA; MARIANA DA COSTA MATTOS, CTAA; ADRIANA PAULA DA SILVA MINGUITA, CTAA; MARIANNA RAMOS DOS ANJOS, CTAA; REINER NEUMANN, CETEM; RENATA NUNES OLIVEIRA, UFRRJ; MARIA INÊS BRUNO TAVARES, UFRJ. |
Título: |
Influence of the microstructure in the biodegradability process of eco-friendly materials based on polylactic acid and mango seed for food packaging to minimize microplastic generation. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Journal Of Applied Polymer Science, e55449, 2023. |
DOI: |
https://doi.org/10.1002/app.55449 |
Idioma: |
Inglês |
Notas: |
Early View. First published. |
Conteúdo: |
In this research, mango parts (kernel and integument) were loaded into a polylactic acid (PLA) matrix by a casting process to develop biocomposite materials. These materials should present improved mechanical and thermal properties and have the potential to be used as environmentally friendly, biodegradable food packaging material with extended shelf life. For this purpose, the research was divided into two parts: step 1, ground materials of a certain particle size from a previous work1 and step 2, which are the materials from Step 1 ground again. The samples were characterized by x-ray diffraction, scanning electron microscopy (SEM), laser granulometry, texture tests, and thermal analysis. The difference between them was particle size distribution, impacting the materials' mechanical strength and degradation rate. Three biocomposites were made (PLA/kernel, PLA/integument, and PLA/kernel/integument) in both steps. SEM was used to observe the size distribution of the mango seed and sample morphology. In addition, resistance values increased with the addition of kernel or integument particles. Biocomposite biodegradability was also evaluated. Based on the results of this study, the biocomposites showed high mechanical properties and thermal stability, making them suitable for applications such as food packaging and structural components to help reduce environmental loads and microplastic generation. |
Palavras-Chave: |
Biodegradable; Biodegradável; Biomaterial; Biomaterials; Biopolímero; Degradação; Renewable polymers. |
Thesaurus Nal: |
Biocompatibility; Biopolymers; Degradation. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 02652naa a2200397 a 4500 001 2163091 005 2024-03-25 008 2023 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1002/app.55449$2DOI 100 1 $aLIMA, E. M. B. 245 $aInfluence of the microstructure in the biodegradability process of eco-friendly materials based on polylactic acid and mango seed for food packaging to minimize microplastic generation.$h[electronic resource] 260 $c2023 500 $aEarly View. First published. 520 $aIn this research, mango parts (kernel and integument) were loaded into a polylactic acid (PLA) matrix by a casting process to develop biocomposite materials. These materials should present improved mechanical and thermal properties and have the potential to be used as environmentally friendly, biodegradable food packaging material with extended shelf life. For this purpose, the research was divided into two parts: step 1, ground materials of a certain particle size from a previous work1 and step 2, which are the materials from Step 1 ground again. The samples were characterized by x-ray diffraction, scanning electron microscopy (SEM), laser granulometry, texture tests, and thermal analysis. The difference between them was particle size distribution, impacting the materials' mechanical strength and degradation rate. Three biocomposites were made (PLA/kernel, PLA/integument, and PLA/kernel/integument) in both steps. SEM was used to observe the size distribution of the mango seed and sample morphology. In addition, resistance values increased with the addition of kernel or integument particles. Biocomposite biodegradability was also evaluated. Based on the results of this study, the biocomposites showed high mechanical properties and thermal stability, making them suitable for applications such as food packaging and structural components to help reduce environmental loads and microplastic generation. 650 $aBiocompatibility 650 $aBiopolymers 650 $aDegradation 653 $aBiodegradable 653 $aBiodegradável 653 $aBiomaterial 653 $aBiomaterials 653 $aBiopolímero 653 $aDegradação 653 $aRenewable polymers 700 1 $aMIDDEA, A. 700 1 $aREIS, F. S. 700 1 $aMATEUS, D. N. 700 1 $aAMORIM, R. G. DE 700 1 $aPEREIRA, I. C. S. 700 1 $aMATTOS, M. da C. 700 1 $aMINGUITA, A. P. da S. 700 1 $aANJOS, M. R. dos 700 1 $aNEUMANN, R. 700 1 $aOLIVEIRA, R. N. 700 1 $aTAVARES, M. I. B. 773 $tJournal Of Applied Polymer Science, e55449, 2023.
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Embrapa Agroindústria de Alimentos (CTAA) |
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Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
07/12/2016 |
Data da última atualização: |
06/02/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
WELLER, M. M. D. C. A.; FORTES, M. R. S.; MARCONDES, M. I.; ROTTA, P. P.; GIONBELI, T. R. S.; VALADARES FILHO, S. C.; CAMPOS, M. M.; SILVA, F. F.; SILVA, W.; MOORE, S.; GUIMARÃES, S. E. F. |
Afiliação: |
M. M. D. C. A. Weller, University of Queensland, Brisbane; M. R. S. Fortes, University of Queensland, Brisbane; M. I. Marcondes, UFV; P. P. Rotta, UFV; T. R. S. Gionbeli, UFV; S. C. Valadares Filho, UFV; MARIANA MAGALHAES CAMPOS, CNPGL; F.F. Silva, UFV; W. Silva, UFV; S. Moore, University of Queensland, Brisbane; S. E. F. Guimarães, UFV. |
Título: |
Effect of maternal nutrition and days of gestation on pituitary gland and gonadal gene expression in cattle. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Journal of Dairy Science, v. 99, n. 4, p. 3056-3071, 2016. |
DOI: |
https://doi.org/10.3168/jds.2015-9673 |
Idioma: |
Inglês |
Conteúdo: |
This study investigated effects of maternal overnutrition on gonadal development and pituitary-gonadal gene expression in cattle fetuses at mid- and late-gestation. Twenty-seven multiparous dry cows were fed either high (ad libitum, H) or moderate (M) intake of the same diet. Twelve cows from H (n=6) and M (n=6) intake carrying females fetuses were euthanized at 199 and 268d of gestation (DG; n=3 for H or M on each DG). Fifteen cows from H (n=6) and M intake (n=9) carrying male fetuses were euthanized at 139, 199, and 241 DG (n=2 for H and n=3 for M on each DG). Fetal gonads and pituitary gland were sampled for gene expression and histological analyses. Sex-specific responses to maternal intake were observed. Primordial and total follicle numbers were lower in fetal ovaries from H than in M intake cows. These results were the reverse for preantral and antral follicles. Volumetric proportion and diameter of seminiferous cord were lower in fetal testis of H than M intake cows. The expression level of FSHB was greater in pituitary gland of the female fetus from H compared with M intake cows, irrespective of DG, whereas LHB gene expression did not differ. In males, FSHB and LHB gene expression levels were similar between maternal intake groups. Fetal ovarian expression of P450 aromatase, StAR, BMPR2, TGFBR1, GDF9, FSHR, Bax, and CASP3 genes were higher in H than in M intake cows, irrespective of DG. Fetal testicular expression of StAR, HSD17B3, IGF1, IGF2, and IGF1R genes was higher in M than in H intake cows. The differences in gene expression for steroidogenesis, folliculogenesis, and apoptosis may explain the distinct pattern of follicular growth between offspring of M and H intake cows. By contrast, the lower volumetric proportion, diameter, and length of seminiferous cord may relate to decreased gene expression in fetal testis from H intake cows. In conclusion, maternal H intake seems to affect fetal ovarian follicular growth and number of follicles, which may affect the size of ovarian reserve in their offspring. In male fetus, maternal H intake seems to disturb testicular development and may have implications on sperm production. The underlying mechanism of differential gene expression and the effect on offspring reproductive potential should be the focus of further research, especially considering larger sample size, reducing the chance for type I errors. MenosThis study investigated effects of maternal overnutrition on gonadal development and pituitary-gonadal gene expression in cattle fetuses at mid- and late-gestation. Twenty-seven multiparous dry cows were fed either high (ad libitum, H) or moderate (M) intake of the same diet. Twelve cows from H (n=6) and M (n=6) intake carrying females fetuses were euthanized at 199 and 268d of gestation (DG; n=3 for H or M on each DG). Fifteen cows from H (n=6) and M intake (n=9) carrying male fetuses were euthanized at 139, 199, and 241 DG (n=2 for H and n=3 for M on each DG). Fetal gonads and pituitary gland were sampled for gene expression and histological analyses. Sex-specific responses to maternal intake were observed. Primordial and total follicle numbers were lower in fetal ovaries from H than in M intake cows. These results were the reverse for preantral and antral follicles. Volumetric proportion and diameter of seminiferous cord were lower in fetal testis of H than M intake cows. The expression level of FSHB was greater in pituitary gland of the female fetus from H compared with M intake cows, irrespective of DG, whereas LHB gene expression did not differ. In males, FSHB and LHB gene expression levels were similar between maternal intake groups. Fetal ovarian expression of P450 aromatase, StAR, BMPR2, TGFBR1, GDF9, FSHR, Bax, and CASP3 genes were higher in H than in M intake cows, irrespective of DG. Fetal testicular expression of StAR, HSD17B3, IGF1, IGF2, and IGF1R genes was hi... Mostrar Tudo |
Palavras-Chave: |
Bovine species; Bovines; Overnutrition; Real-time PCR. |
Thesaurus NAL: |
Animal reproduction; fetal development; reproduction. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/151424/1/Cnpgl-2016-JDairySci-Effect-of-maternal.pdf
|
Marc: |
LEADER 03413naa a2200337 a 4500 001 2058195 005 2024-02-06 008 2016 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.3168/jds.2015-9673$2DOI 100 1 $aWELLER, M. M. D. C. A. 245 $aEffect of maternal nutrition and days of gestation on pituitary gland and gonadal gene expression in cattle.$h[electronic resource] 260 $c2016 520 $aThis study investigated effects of maternal overnutrition on gonadal development and pituitary-gonadal gene expression in cattle fetuses at mid- and late-gestation. Twenty-seven multiparous dry cows were fed either high (ad libitum, H) or moderate (M) intake of the same diet. Twelve cows from H (n=6) and M (n=6) intake carrying females fetuses were euthanized at 199 and 268d of gestation (DG; n=3 for H or M on each DG). Fifteen cows from H (n=6) and M intake (n=9) carrying male fetuses were euthanized at 139, 199, and 241 DG (n=2 for H and n=3 for M on each DG). Fetal gonads and pituitary gland were sampled for gene expression and histological analyses. Sex-specific responses to maternal intake were observed. Primordial and total follicle numbers were lower in fetal ovaries from H than in M intake cows. These results were the reverse for preantral and antral follicles. Volumetric proportion and diameter of seminiferous cord were lower in fetal testis of H than M intake cows. The expression level of FSHB was greater in pituitary gland of the female fetus from H compared with M intake cows, irrespective of DG, whereas LHB gene expression did not differ. In males, FSHB and LHB gene expression levels were similar between maternal intake groups. Fetal ovarian expression of P450 aromatase, StAR, BMPR2, TGFBR1, GDF9, FSHR, Bax, and CASP3 genes were higher in H than in M intake cows, irrespective of DG. Fetal testicular expression of StAR, HSD17B3, IGF1, IGF2, and IGF1R genes was higher in M than in H intake cows. The differences in gene expression for steroidogenesis, folliculogenesis, and apoptosis may explain the distinct pattern of follicular growth between offspring of M and H intake cows. By contrast, the lower volumetric proportion, diameter, and length of seminiferous cord may relate to decreased gene expression in fetal testis from H intake cows. In conclusion, maternal H intake seems to affect fetal ovarian follicular growth and number of follicles, which may affect the size of ovarian reserve in their offspring. In male fetus, maternal H intake seems to disturb testicular development and may have implications on sperm production. The underlying mechanism of differential gene expression and the effect on offspring reproductive potential should be the focus of further research, especially considering larger sample size, reducing the chance for type I errors. 650 $aAnimal reproduction 650 $afetal development 650 $areproduction 653 $aBovine species 653 $aBovines 653 $aOvernutrition 653 $aReal-time PCR 700 1 $aFORTES, M. R. S. 700 1 $aMARCONDES, M. I. 700 1 $aROTTA, P. P. 700 1 $aGIONBELI, T. R. S. 700 1 $aVALADARES FILHO, S. C. 700 1 $aCAMPOS, M. M. 700 1 $aSILVA, F. F. 700 1 $aSILVA, W. 700 1 $aMOORE, S. 700 1 $aGUIMARÃES, S. E. F. 773 $tJournal of Dairy Science$gv. 99, n. 4, p. 3056-3071, 2016.
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