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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

CaracterÃsticas de qualidade da carne de coelhos alimentados com raÃÃes contendo farelo de coco / Characteristics of quality of the meat of rabbits fed with feeding contend coconut meal(CM)

Daniela Vieira de Souza 27 April 2007 (has links)
Este trabalho teve como objetivo verificar o efeito da inclusÃo de farelo de coco (FC) na raÃÃo de coelhos (Nova ZelÃndia Branco x CalifÃrnia) sobre a composiÃÃo centesimal, propriedades fÃsicas e funcionais e perfil de Ãcidos graxos da carne. TambÃm foi determinada a relaÃÃo de Ãcidos graxos poliinsaturados para saturados (P/S). O delineamento experimental foi inteiramente casualizado com cinco nÃveis de inclusÃo na raÃÃo (0,00; 6,25; 12,50; 18,75 e 25,00%) e doze repetiÃÃes por tratamento, totalizando 60 coelhos. O aumento dos nÃveis de FC na raÃÃo nÃo afetou (p>0,05) a composiÃÃo centesimal, o pH e as perdas de peso por cocÃÃo (PPC) da carne. Os nÃveis de FC na raÃÃo tiveram efeito quadrÃtico sobre a capacidade de retenÃÃo de Ãgua (CRA) e linear sobre a resistÃncia ao corte (RC) da carne. As raÃÃes contendo 25,00% de FC produziram carne com menores (p<0,05) valores de CRA e aquelas contendo 18,75 e 25,00% de FC produziram carnes com maiores (p<0,05) valores de RC que a carne do tratamento com 0,00% de FC. Nas carnes provenientes das raÃÃes contendo 12,50, 18,75 e 25,00% de FC o componente de cor a* teve valores maiores (p<0,05) que o da carne da raÃÃo com 0,00% de FC. O componente de cor b* foi afetado linearmente pelos nÃveis de FC na raÃÃo e todas as raÃÃes contendo FC produziram carnes com valores de b* mais altos (p<0,05) que aquela proveniente da raÃÃo com 0,00% de FC. Dentre os Ãcidos graxos mais abundantes na carne de coelho o palmitolÃico, o esteÃrico e o linolÃnico foram afetados linearmente pelo nÃvel de FC na raÃÃo. Em relaÃÃo ao nÃvel desses Ãcidos graxos na carne dos coelhos alimentados com 0,00% de FC observou-se menores (p<0,05) nÃveis de Ãcido palmÃtico na carne proveniente de todas as raÃÃes contendo FC; maiores (p<0,05) nÃveis dos Ãcidos mirÃstico e esteÃrico e menor (p<0,05) de Ãcido palmitolÃico na carne proveniente da raÃÃo com 25,00% de FC e menor (p<0,05) nÃvel de Ãcido linolÃnico nas carnes provenientes das raÃÃes contendo 18,75 e 25,00% de FC. A relaÃÃo P/S na carne de coelho nÃo foi afetada significativamente (p>0,05) pelos tratamentos, indicando que a inclusÃo desse subproduto na raÃÃo de coelhos à viÃvel atà 25,00%. / The objective of this work was to assess the effect of feeding rabbits (White New Zeeland x Californian) with diets containing coconut meal (CM) on meat proximal composition, physical and functional properties and fatty acid profile. The ratio polyunsaturated to saturated (P/S) fatty acids in the meat was also assessed. The experiment utilized 60 rabbits in a complete randomized design with diets containing five levels of CM (0.00, 6.25, 12.50, 18.75 and 25.00%) and 12 animals per treatment. Increasing levels of CM in the diet did not affect (p>0.05) meat proximal composition, pH or cooking losses (CL). CM levels in the diets showed a quadratic effect on meat water holding capacity (WHC) and a linear effect on meat shear force (SF). Diets containing 25.00% CM produced meat with lower (p<0.05) WHC and those containing 18.75 and 25.00% CM produced meat with higher (p<0.05) SF than that from the diet with 0.00% CM. Color component a* in meat from diets containing 12.50, 18.75 and 25.00% CM was higher (p<0.05) than that in the meat from the diet with 0.00% CM. Meat color component b* was linearly affected by CM levels and all diets containing CM produced meats with higher (p<0.05) b* values than that from the 0.00% CM. The levels of palmitoleic, stearic, and linolenic acids in the meat were linearly affected by dietary CM levels. When compared to the levels of fatty acids in the meat from the 0.00% CM diet, palmitic acid was lower (p<0.05) in the meat from all diets containing CM; myristic acid and stearic acid levels were higher (p<0.05) and palmitoleic acid level was lower (p<0.05) in the meat from the diet containing 25.00% CM and linolenic acid level was lower (p<0.05) in meats from diets containing 18.75 and 25.00%. The relation P/S in the meat was not affected (p>0.05) by the levels of CM in the diets suggesting that the inclusion of this by-product in the diets is feasible even at the 25.00% level.

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