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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.2003.tde-20102003-161041
Document
Author
Full name
Tatiana Pacheco Nunes
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 2003
Supervisor
Committee
Castillo, Carmen Josefina Contreras (President)
Roça, Roberto de Oliveira
Spoto, Marta Helena Fillet
Title in Portuguese
Efeito da pré-cura na estabilidade microbiológica de carne mecanicamente separada e elaboração de um produto reestruturado com filés de peito de galinhas de descarte.
Keywords in Portuguese
carnes e derivados
congelamento
conservante de alimento
galinhas – descarte
microbiologia de alimento
nitrito
processamento de alimentos.
Abstract in Portuguese
Os peitos de galinhas matrizes pesadas de corte, poedeiras comerciais brancas e frangos foram desossados manualmente, com o objetivo de avaliar e comparar as propriedades tecnológicas - capacidade de retenção de água e de emulsificação - bem como pH e composição centesimal, além de elaborar e avaliar sensorialmente um produto reestruturado empanado, tipo nugget. Os resultados das análises indicaram que não houve diferença significativa entre as carnes analisadas, nem entre produtos processados, implicando utilização regular desse tipo de matéria-prima na indústria de alimentos. O restante das carcaças das galinhas foi utilizado para extração de carne mecanicamente separada (CMS) para avaliação da estabilidade microbiológica. As CMSs foram submetidas a dois tratamentos: I) com 150ppm de nitrito, embaladas em saco de polietileno; e II) com 150ppm de nitrito e 500ppm de eritorbato, embaladas em saco de polietileno. Como controle, as amostras de CMS foram apenas acondicionadas em sacos de polietileno. Todas as embalagens foram estocadas e congeladas a -18ºC por 99 dias. Os resultados da análise de caracterização microbiológica indicaram que tanto as amostras de CMS de galinha matriz quanto de galinha poedeira atenderam os padrões de contagem requeridos pela legislação Brasileira. A avaliação da estabilidade microbiológica das CMSs no primeiro e no último dia para mesófilos, Escherichia coli, Staphylococcus aureus, Clostridium perfringens e Pseudomonas, bem como as análises quinzenais de microrganismos psicrotróficos, indicaram que não houve uma redução significativa nas contagens, independentemente do tratamento aplicado. Não foi detectada Salmonella em nenhuma das amostras analisadas. Tais resultados apontaram o tempo de estocagem como o principal fator na redução da carga bacteriana.
Title in English
Effects of sodium nitrite and erythorbate on microbiological stability of mechanically deboned meat and processing of coated reestructured product.
Keywords in English
food microbiology
food preservative
food processing.
freezing
meat and meat products
nitrite
spent hens
Abstract in English
The breasts of heavy fowls, white commercial egg-layers and chickens were manually deboned in order to evaluate and compare technological properties—water hold and emulsifying capacity—and pH and centesimal composition, as well as to prepare and assess a restructured coated product. The results of the analyses indicated that there was not a significant difference between the meats analyzed, nor among the processed products, implying the regular use of such meat in the food industry. The remaining parts of the hens’ carcasses were mechanically deboned for the evaluation of microbiological stability. The mechanically deboned meat (MDM) was submitted to two treatments: I) 150ppm of nitrite, packed in polyethylene bags; II) 150ppm of nitrite and 500ppm of erythorbate, packed in polyethylene bags. The control meats were just packed in polyethylene bags. All samples were frozen-stored at -18ºC for 99 days. The results of microbiological characterization indicated that both samples from heavy fowls and egg-layers were in accordance with the Brazilian legislation. MDM microbiological stability evaluation on the first and last days for fecal coliforms, mesophiles, Staphylococcus aureus, Clostridium perfringens and Pseudomonas, as well as the analyses carried out every fifteen days for psychrotrophics bacteria indicated that there was not a significant reduction in the presence of the above, irrespective of the treatment applied. Salmonella was not detected in any of the samples. Such results indicated that freezing storage period was the main factor responsible for the reduction of the bacterial count in MDM.
 
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Publishing Date
2004-08-11
 
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