estudo da vida-de-prateleira de fruta estruturada e desidratada obtida de polpa concentrada de mamão shelf life studies of restructured and dried fruit made from concentrated papaya pulp

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ID: 227366
2006
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Abstract
A fruta estruturada contendo polpa concentrada de mamão (700 g/kg), sacarose (340 g/kg), alginato de sódio (7 g/kg), pectina de baixa metoxilação (7 g/kg) e glicerol (50 g/kg), cortada no formato cilindro sólido (vol. aprox. 2 cm³), desidratada (12% umidade), com cobertura de açúcar impalpável, foi utilizada no estudo de vida-de-prateleira. Foram realizadas análises físicas, químicas, sensoriais e microbiológicas no produto devidamente acondicionado em sacos de filme multilaminado, para acompanhar a evolução da perda de qualidade do produto armazenado a 0, 25 e 35 °C, durante 120 dias. Os resultados mostraram que a firmeza objetiva e as avaliações subjetivas da textura e qualidade global, foram as que melhor identificaram a queda na qualidade da fruta estruturada durante a estocagem. Na condição acelerada (35 °C), o produto foi considerado próprio para consumo até 56 dias de armazenamento, quando atingiu a nota 4,5 (não gostei/nem desgostei) da escala de qualidade global do teste sensorial. Os dados cinéticos, Ea = 19,89 kcal/mol e Q10 = 3, estabelecidos no teste acelerado, permitiram estimar o limite da vida útil em 168 dias para o produto armazenado a 25 °C. Em condições normais de armazenamento, estimam-se 154 dias de vida útil com base na equação da qualidade global dos resultados sensoriais.
The restructured fruit made with concentrated papaya pulp (700 g/kg), sugar (340 g/kg), sodium alginate (7 g/kg), low methoxy pectin (7 g/kg) and glycerol (50 g/kg), cut in a solid cylindrical form (volume approx. 2 cm³), dehydrated (12% humidity) and covered with icing sugar, was chosen for the shelf life studies. The physical, chemical, sensory and microbiological analyses were made on the product packaged in a multi layer film and stored at 0, 25 and 35 °C, for 120 days to check for quality loss. The results showed that the firmness (TA.XT2 Texturometer) and the subjective evaluations of texture and overall quality were the evaluation that best explained the quality loss of the restructured fruit during storage. Under accelerated conditions (35 °C) the product was considered adequate for consumption for up to 56 days, when it reached 4.5 (neither liked nor disliked) from the overall quality scale of the sensorial test. The kinetic values, Ea= 19,89 kcal/mol and Q10= 3, established using accelerated shelf life testing, allowed for the estimation of a shelf life of 168 days for the product at 25 °C. Under normal storage conditions, the shelf life of the product being estimated as 154 days based on the overall quality using the sensory results.
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grizotto2006foodestudo Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Regina Kitagawa Grizotto, Shirley Aparecida Garcia Berbari, Sílvia Cristina Sobottka Rolim de Moura, Melissa Lima Claus
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Journal software - practice and experience
Year 2006
DOI
10.1590/S0101-20612006000300035
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612006000300035
Keywords
stability foods and food supplytechnology (general)

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