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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
29/08/2023 |
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Data da última atualização: |
30/11/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CAMPOS, J. V. DE; PROCOPIO, F. R.; BARIONI JUNIOR, W.; NOGUEIRA, A. R. de A.; JACINTO, M. A. C. |
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Afiliação: |
JÉSSICA VALÉRIA DE CAMPOS; FERNANDA RAMALHO PROCOPIO; WALDOMIRO BARIONI JUNIOR, CPPSE; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; MANUEL ANTONIO CHAGAS JACINTHO, CPPSE. |
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Título: |
Influence of the collagen fibre bundle arrangements on the qualitative aspect of Nile Tilapia (Oreochromis niloticus) leather. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Journal of the Society of Leather Technologists and Chemists, v. 107, n. 4, p. 148-157, jul.aug. 2023. |
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Idioma: |
Inglês |
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Conteúdo: |
Mechanical tensile and tear tests are used for qualitatively evaluating leather. The tests express the physical response of the tanned collagen fibre bundles subjected to stretching. Unlike mammals, the collagen fibre bundles in fishskins form overlapping layers, oblique to each other. This arrangement can influence the mechanical behaviour of the material and, therefore, must be taken into account when establishing the specimenʼs directions. Despite this peculiarity and due to the absence of specific technical norms for the position and preparation of specimens for testing, qualitative research with fish leather has used parameters established for mammals. Thus, this study aimed to verify the influence of the collagen fibre bundle arrangement as observed by scanning electron microscopy (SEM), on the qualitative aspects of Nile Tilapia (Oreochromis niloticus) leather. The skins were tanned with chrome, associated with oxazolidine. Tilapia leathers were analysed for their physical-mechanical properties, adopting cut directions of parallel, perpendicular, dorsal-ventral and ventral-dorsal, all with reference to the Tilapia cephalocaudal axis. Skin and leather evaluation through scanning electronic microscopy (SEM) revealed layers with continuous fibres bundles interspersed by layers of continuous fibres arranged in an oblique direction. The data revealed no statistical difference for the side (right and left) from which the specimens were taken. However, different behaviours of tensile strength, percentage elongation, and tear strength were observed. The tensile strength of the orange-brown leather was higher for the perpendicular direction and lower for cutting in the parallel direction. Regarding stretching, the parallel cut presented the highest value, lower for the dorsal-ventral and ventral-dorsal cuts. As for tear strength, higher values, were observed for the perpendicular and ventral-dorsal cuts. Results showed the influence of skin organisation on leather resistance and the need for method standardisation, elaborating specific norms for the qualitative evaluation of fish leather. MenosMechanical tensile and tear tests are used for qualitatively evaluating leather. The tests express the physical response of the tanned collagen fibre bundles subjected to stretching. Unlike mammals, the collagen fibre bundles in fishskins form overlapping layers, oblique to each other. This arrangement can influence the mechanical behaviour of the material and, therefore, must be taken into account when establishing the specimenʼs directions. Despite this peculiarity and due to the absence of specific technical norms for the position and preparation of specimens for testing, qualitative research with fish leather has used parameters established for mammals. Thus, this study aimed to verify the influence of the collagen fibre bundle arrangement as observed by scanning electron microscopy (SEM), on the qualitative aspects of Nile Tilapia (Oreochromis niloticus) leather. The skins were tanned with chrome, associated with oxazolidine. Tilapia leathers were analysed for their physical-mechanical properties, adopting cut directions of parallel, perpendicular, dorsal-ventral and ventral-dorsal, all with reference to the Tilapia cephalocaudal axis. Skin and leather evaluation through scanning electronic microscopy (SEM) revealed layers with continuous fibres bundles interspersed by layers of continuous fibres arranged in an oblique direction. The data revealed no statistical difference for the side (right and left) from which the specimens were taken. However, different behavio... Mostrar Tudo |
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Palavras-Chave: |
Technical standards. |
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Thesaurus Nal: |
Collagen; Mechanical properties. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02844naa a2200205 a 4500
001 2156191
005 2023-11-30
008 2023 bl uuuu u00u1 u #d
100 1 $aCAMPOS, J. V. DE
245 $aInfluence of the collagen fibre bundle arrangements on the qualitative aspect of Nile Tilapia (Oreochromis niloticus) leather.$h[electronic resource]
260 $c2023
520 $aMechanical tensile and tear tests are used for qualitatively evaluating leather. The tests express the physical response of the tanned collagen fibre bundles subjected to stretching. Unlike mammals, the collagen fibre bundles in fishskins form overlapping layers, oblique to each other. This arrangement can influence the mechanical behaviour of the material and, therefore, must be taken into account when establishing the specimenʼs directions. Despite this peculiarity and due to the absence of specific technical norms for the position and preparation of specimens for testing, qualitative research with fish leather has used parameters established for mammals. Thus, this study aimed to verify the influence of the collagen fibre bundle arrangement as observed by scanning electron microscopy (SEM), on the qualitative aspects of Nile Tilapia (Oreochromis niloticus) leather. The skins were tanned with chrome, associated with oxazolidine. Tilapia leathers were analysed for their physical-mechanical properties, adopting cut directions of parallel, perpendicular, dorsal-ventral and ventral-dorsal, all with reference to the Tilapia cephalocaudal axis. Skin and leather evaluation through scanning electronic microscopy (SEM) revealed layers with continuous fibres bundles interspersed by layers of continuous fibres arranged in an oblique direction. The data revealed no statistical difference for the side (right and left) from which the specimens were taken. However, different behaviours of tensile strength, percentage elongation, and tear strength were observed. The tensile strength of the orange-brown leather was higher for the perpendicular direction and lower for cutting in the parallel direction. Regarding stretching, the parallel cut presented the highest value, lower for the dorsal-ventral and ventral-dorsal cuts. As for tear strength, higher values, were observed for the perpendicular and ventral-dorsal cuts. Results showed the influence of skin organisation on leather resistance and the need for method standardisation, elaborating specific norms for the qualitative evaluation of fish leather.
650 $aCollagen
650 $aMechanical properties
653 $aTechnical standards
700 1 $aPROCOPIO, F. R.
700 1 $aBARIONI JUNIOR, W.
700 1 $aNOGUEIRA, A. R. de A.
700 1 $aJACINTO, M. A. C.
773 $tJournal of the Society of Leather Technologists and Chemists$gv. 107, n. 4, p. 148-157, jul.aug. 2023.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
27/01/1998 |
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Data da última atualização: |
15/03/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Local - A |
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Autoria: |
GARCIA, L. C.; SIQUEIRA, M. do S. G.; LOPES, S. de S. |
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Afiliação: |
LUCINDA CARNEIRO GARCIA, CPAA; MARIA DO SOCORRO G. SIQUEIRA, CPAA; SEBASTIAO DE SALES LOPES, CPAA. |
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Título: |
Tratamentos pré-germinativos para quebra de dormência em sementes de algumas leguminosas arbustivas, na Amazônia Ocidental. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
Revista da Universidade do Amazonas. Serie: Ciências Agrárias, Manaus, v. 3, n. 1, p. 59-68, jan./jun. 1994. |
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Idioma: |
Português |
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Conteúdo: |
A impermeabilidade do tegumento a agua e aos gases sao causas mais comuns de dormencia em sementes de leguminosas tropicais. Dai surge a necessidade de se conhecer metodos praticos e eficientes para superar a dormencia das sementes dessas especies. Neste enfoque, o presente trabalho, conduzido no Laboratorio de Sementes do Centro de Pesquisa Agroflorestal da Amazonia Ocidental, teve como objetivo testar metodos de escarificacao de sementes das leguminosas crotalaria (Crotalaria striata Schrank), flemingia (Flemingia macrophylla Merr.), indigofera (Indigofera tinctoria L.) e tefrosia (Tephrosia candida DC.). Foram utilizados os tratamentos acido sulfurico (H2SO4), a 15 minutos; soda caustica a 20% por minutos; imersao em agua a 80C, desligando a fonte de calor em seguida; imersao em agua a temperatura ambiente, por 24 horas e sementes nao tratadas (testemunha). A analise dos dados e a interpretacao dos resultados permitiram concluir que nem sempre o acido sulfurico e o melhor metodo para se escarificar as sementes dessas leguminosas e que a agua a 80C podera ser tao eficiente quanto o acido sulfurico, como tratamento para superar a dormencia das sementes dessas especies. |
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Palavras-Chave: |
Amazonas; Brasil; Crotalari striata; Flemingia macrophyulla; Leguminosas tropicais; Leguminous; Manaus; Quebra da semente; Scarification of seeds; Seed; Species; Tefrosia; Tropical legumes. |
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Thesagro: |
Crotalária; Crotalária Striata; Escarificação de sementes; Espécie; Germinação; Leguminosa; Semente. |
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Thesaurus NAL: |
dormancy breaking; Flemingia; Flemingia macrophylla; germination; Indigofera; Indigofera tinctoria; Tephrosia candida. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/122536/1/Revista-UFAM-v.3-n.1-1994-p.-59-68.pdf
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Marc: |
LEADER 02540naa a2200469 a 4500
001 1668810
005 2018-03-15
008 1994 bl uuuu u00u1 u #d
100 1 $aGARCIA, L. C.
245 $aTratamentos pré-germinativos para quebra de dormência em sementes de algumas leguminosas arbustivas, na Amazônia Ocidental.
260 $c1994
520 $aA impermeabilidade do tegumento a agua e aos gases sao causas mais comuns de dormencia em sementes de leguminosas tropicais. Dai surge a necessidade de se conhecer metodos praticos e eficientes para superar a dormencia das sementes dessas especies. Neste enfoque, o presente trabalho, conduzido no Laboratorio de Sementes do Centro de Pesquisa Agroflorestal da Amazonia Ocidental, teve como objetivo testar metodos de escarificacao de sementes das leguminosas crotalaria (Crotalaria striata Schrank), flemingia (Flemingia macrophylla Merr.), indigofera (Indigofera tinctoria L.) e tefrosia (Tephrosia candida DC.). Foram utilizados os tratamentos acido sulfurico (H2SO4), a 15 minutos; soda caustica a 20% por minutos; imersao em agua a 80C, desligando a fonte de calor em seguida; imersao em agua a temperatura ambiente, por 24 horas e sementes nao tratadas (testemunha). A analise dos dados e a interpretacao dos resultados permitiram concluir que nem sempre o acido sulfurico e o melhor metodo para se escarificar as sementes dessas leguminosas e que a agua a 80C podera ser tao eficiente quanto o acido sulfurico, como tratamento para superar a dormencia das sementes dessas especies.
650 $adormancy breaking
650 $aFlemingia
650 $aFlemingia macrophylla
650 $agermination
650 $aIndigofera
650 $aIndigofera tinctoria
650 $aTephrosia candida
650 $aCrotalária
650 $aCrotalária Striata
650 $aEscarificação de sementes
650 $aEspécie
650 $aGerminação
650 $aLeguminosa
650 $aSemente
653 $aAmazonas
653 $aBrasil
653 $aCrotalari striata
653 $aFlemingia macrophyulla
653 $aLeguminosas tropicais
653 $aLeguminous
653 $aManaus
653 $aQuebra da semente
653 $aScarification of seeds
653 $aSeed
653 $aSpecies
653 $aTefrosia
653 $aTropical legumes
700 1 $aSIQUEIRA, M. do S. G.
700 1 $aLOPES, S. de S.
773 $tRevista da Universidade do Amazonas. Serie: Ciências Agrárias, Manaus$gv. 3, n. 1, p. 59-68, jan./jun. 1994.
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Embrapa Amazônia Ocidental (CPAA) |
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