Qualidade da carne bovina (M. semitendinosus) injetada, acondicionada em embalagem cook in e cozida sob diferentes regimes de cocção
Jose Ricardo Gonçalves
TESE
Português
T/UNICAMP G586q
[Quality of injected beef (M. semitendinosus) packed in cook in bags and cooked under different cooking regimes]
Campinas, SP : [s.n.], 2009.
95 p. : il.
Orientador: Marise Aparecida Rodrigues Pollonio
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
Resumo: Foram estudados os efeitos da composição da salmoura (em nível de 20%) e dos regimes de cozimento na estabilidade físico-química, sensorial e microbiológica da carne bovina (M. semitendinosus), acondicionada em embalagem cook in. O estudo foi realizado em duas etapas experimentais. Na...
Ver mais
Resumo: Foram estudados os efeitos da composição da salmoura (em nível de 20%) e dos regimes de cozimento na estabilidade físico-química, sensorial e microbiológica da carne bovina (M. semitendinosus), acondicionada em embalagem cook in. O estudo foi realizado em duas etapas experimentais. Na primeira etapa a carne foi injetada de modo a incorporar cloreto de sódio (1%), tripolifosfato de sódio (0,2 e 0,4%), extrato de alecrim (0,025 e 0,050%) e mistura de lactato/diacetato de sódio (0,40/0,03%), cozida à temperatura interna de 70ºC durante 60min (condição em que o sabor de requentado ocorre mais rapidamente) e armazenada a 4ºC por um período de 30 dias. Foram avaliados os efeitos sobre o pH, perda de peso no repouso, perda de peso no cozimento, rendimento de processo, cor (L*, a*, b*), força de cisalhamento, crescimento de bactérias, índice de oxidação (TBARS) e aparência e odor. Os resultados mostram que a concentração de tripolifosfato de sódio teve efeito significativo (p<0,05) no aumento do pH, na redução das perdas de peso no repouso, na redução das perdas de peso no cozimento e no aumento do rendimento de processo. O extrato de alecrim não apresentou efeito significativo (p>0,05) sobre estas repostas. Durante os 30 dias de armazenamento a 4ºC, o tempo mostrou efeito significativo (p<0,05) nas variações de pH, cor (L*, a*, b*), força de cisalhamento e no índice de TBARS. A oxidação foi mais evidente no tratamento controle (sem injeção), mas os tratamentos com injeção foram capazes de minimizar a velocidade da reação. Não foi detectada a presença de patógenos durante o período de armazenamento a 4ºC, mas apenas indícios de uma fase inicial de deterioração por psicrotróficos no último dia de avaliação. Quanto à aparência e odor, as maiores porcentagens de aceitação foram atribuídas pelos consumidores aos tratamentos sem injeção (controle) por causa da coloração característica de carne cozida. Na segunda etapa do experimento foi utilizada uma das formulações selecionadas na etapa anterior para avaliar a influencia dos regimes de cozimento com dois tempos de residência a 60ºC (60 e 120min) e duas temperaturas finais (70 e 80ºC) de processo. Os tratamentos apresentaram efeito significativo (p<0,05) sobre as respostas, sendo que os regimes de cozimento com temperatura final de 70ºC resultaram em maior rendimento de processo e menor perda de peso na cocção, independentemente do tempo de residência a 60ºC. Mas, os valores da força de cisalhamento foram numericamente muito parecidos em todos os tratamentos. Os regimes de cozimento mostraram-se potencialmente seguros quanto a destruição de células vegetativas de Listeria monocytogenes e Clostridium perfringens. Em particular, os tratamentos com temperatura interna final de 80ºC apresentaram um potencial de destruição mais drástico, capaz de eliminar a forma esporulada de Clostridium botulinum tipo E, além de e outros microrganismos de resistência térmica equivalente ou inferior. Dependendo de novos estudos, o tratamento térmico poderá reduzir a necessidade de agentes bacteriostáticos na formulação da salmoura, sem prejudicar as características de qualidade da carne bovina
Ver menos
Abstract: This study focuses on the effects of brine composition (at the 20% level) and cooking time and temperature on the physical-chemical, sensory and microbiological stability of bovine meat (M. semitendinosus), packed in cook in bags. The study was conducted in two experimental phases.
In... Ver mais Abstract: This study focuses on the effects of brine composition (at the 20% level) and cooking time and temperature on the physical-chemical, sensory and microbiological stability of bovine meat (M. semitendinosus), packed in cook in bags. The study was conducted in two experimental phases.
In phase I, the meat was injected so as to incorporate sodium chloride (1%), sodium tripolyphosphate (0,2 and 0,4%), (condition in which warmed over flavor -WOF develops more rapidly) and stored at 4ºC for a period of 30 days. The study evaluated the effects on pH, weight loss (during holding at 4ºC/48h), cooking loss, process yield, color (L*, a*, b*), shear force, bacterial growth, oxidation index (TBARS), in addition to overall appearance and odor. The results show that the concentration of tripolyphosphate had a significant effect (p<0,05) on the pH increase, on the reduction of weight loss during holding, on the reduction of cooking loss and on the increase in process yield. The rosemary extract had no significant effect (p>0,05) on these parameters. During the 30 days storage at 4ºC, time was found to exert a significant effect (p<0,05) on pH variations, color (L*, a*, b*), shear force and the TBARS index. Oxidation was more evident in the control treatment (without injection), but the injection treatments were effective in minimizing the speed of the oxidation reaction. Pathogens were not detected throughout storage at 4ºC, except for slight indications of the onset of spoilage by psychrotrophic bacteria on the last day of evaluation. As for overall appearance and odor, consumers assigned the highest acceptance percentages to the treatments without injection (control) due to the typical color of cooked meat. In the second phase of the experiment, one of the formulations selected in the previous phase was used to evaluate the influence of the cooking conditions of time and temperature by testing two holding times at 60ºC (60 e 120min) and two final process temperatures (70 and 80ºC). The treatments exhibited a significant effect (p<0,05) on the parameters assessed, with the cooking processes with final temperature of 70ºC producing higher process yields and lower weight loss during cooking, irrespective of the holding temperature of 60ºC. On the other hand, the shear force values were numerically very similar across all the treatments investigated. The cooking time and temperature combinations tested were found potentially safe with respect to the destruction of vegetative cells of Listeria monocytogenes and Clostridium perfringens. Particularly the treatments with final internal temperature of 80ºC exhibited a much higher destruction potential and were found to be able to eliminate Clostridium botulinum E type spores, in addition to other microorganisms of equal or lower heat resistance. Depending on new studies, the use of appropriate heat treatments may reduce the need for bacteriostatic Ver menos
In... Ver mais Abstract: This study focuses on the effects of brine composition (at the 20% level) and cooking time and temperature on the physical-chemical, sensory and microbiological stability of bovine meat (M. semitendinosus), packed in cook in bags. The study was conducted in two experimental phases.
In phase I, the meat was injected so as to incorporate sodium chloride (1%), sodium tripolyphosphate (0,2 and 0,4%), (condition in which warmed over flavor -WOF develops more rapidly) and stored at 4ºC for a period of 30 days. The study evaluated the effects on pH, weight loss (during holding at 4ºC/48h), cooking loss, process yield, color (L*, a*, b*), shear force, bacterial growth, oxidation index (TBARS), in addition to overall appearance and odor. The results show that the concentration of tripolyphosphate had a significant effect (p<0,05) on the pH increase, on the reduction of weight loss during holding, on the reduction of cooking loss and on the increase in process yield. The rosemary extract had no significant effect (p>0,05) on these parameters. During the 30 days storage at 4ºC, time was found to exert a significant effect (p<0,05) on pH variations, color (L*, a*, b*), shear force and the TBARS index. Oxidation was more evident in the control treatment (without injection), but the injection treatments were effective in minimizing the speed of the oxidation reaction. Pathogens were not detected throughout storage at 4ºC, except for slight indications of the onset of spoilage by psychrotrophic bacteria on the last day of evaluation. As for overall appearance and odor, consumers assigned the highest acceptance percentages to the treatments without injection (control) due to the typical color of cooked meat. In the second phase of the experiment, one of the formulations selected in the previous phase was used to evaluate the influence of the cooking conditions of time and temperature by testing two holding times at 60ºC (60 e 120min) and two final process temperatures (70 and 80ºC). The treatments exhibited a significant effect (p<0,05) on the parameters assessed, with the cooking processes with final temperature of 70ºC producing higher process yields and lower weight loss during cooking, irrespective of the holding temperature of 60ºC. On the other hand, the shear force values were numerically very similar across all the treatments investigated. The cooking time and temperature combinations tested were found potentially safe with respect to the destruction of vegetative cells of Listeria monocytogenes and Clostridium perfringens. Particularly the treatments with final internal temperature of 80ºC exhibited a much higher destruction potential and were found to be able to eliminate Clostridium botulinum E type spores, in addition to other microorganisms of equal or lower heat resistance. Depending on new studies, the use of appropriate heat treatments may reduce the need for bacteriostatic Ver menos
Pollonio, Marise Aparecida Rodrigues, 1961-
Orientador
Silveira, Expedito Tadeu Facco
Avaliador
Guimarães, Judite Lapa
Avaliador
Manhani, Maria Raquel, 1967-
Avaliador
Beraquet, Nelson José
Avaliador
Qualidade da carne bovina (M. semitendinosus) injetada, acondicionada em embalagem cook in e cozida sob diferentes regimes de cocção
Jose Ricardo Gonçalves
Qualidade da carne bovina (M. semitendinosus) injetada, acondicionada em embalagem cook in e cozida sob diferentes regimes de cocção
Jose Ricardo Gonçalves
Exemplares
Nº de exemplares: 2
Não existem reservas para esta obra