avaliação da qualidade de caldo de cana envasado a quente e por sistema asséptico quality of sugarcane (sacharum ssp.) juice packed by hot fill and aseptic processes
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2006
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Abstract
Dois processos térmicos foram aplicados ao caldo de cana com o objetivo de se obter um produto estável à temperatura ambiente. A variedade de cana de açúcar (Sacharum ssp.) utilizada foi a RB72 - 454. A metodologia de planejamento fatorial foi aplicada a fim de se verificar a melhor combinação entre acidez (pH) e doçura (°Brix). Houve uma tendência para melhor aceitação sensorial quando o pH foi maior que 4,0 e °Brix maior que 15. Primeiramente, o caldo foi submetido a 141 °C /10 s e envasado assepticamente em garrafas de vidro previamente esterilizadas. No segundo processo, o caldo foi submetido ao tratamento térmico a 110 °C /10 s e envasado a quente (90 ± 5 °C) em garrafas de vidro. Análises físico-químicas, microbiológicas e sensoriais foram realizadas durante a estocagem dos lotes à temperatura ambiente. O lote processado assepticamente apresentou vida útil de 30 dias e o envasado a quente, 60 dias, não apresentando diferença estatística (p < 0,05) nos testes sensoriais de aceitação, em relação às amostras congeladas. O envase a quente causou menor escurecimento ao produto durante estocagem à temperatura ambiente e maiores médias de aceitação sensorial em relação aos atributos: aparência, aroma e impressão global, possivelmente devido ao maior efeito térmico sobre a inativação das enzimas do caldo de cana.
The objective of this work is to evaluate two thermal processes in order to obtain sugarcane (Sacharum ssp.) juice stable at room temperature in glass bottles. An experimental methodology was applied to obtain the best combination between pH and °Brix based on the sensory results. There was a tendency for a better sensory acceptance for pH > 4.0 and °Brix > 15. Two thermal processes were applied to sterilize the juice. Firstly, the juice was submitted to 141 °C /10 s, and then aseptically filled in glass bottles previously sterilized. In the second process, the juice was submitted to 110 °C /10 s and filled into glass bottles at 90 ± 5 °C. Physical-chemical changes, microbiological counts and sensory acceptance were evaluated during the storage at room temperature. The shelf life of aseptically processed juice was 30 days and 60 days for the hot filled juice based on the sensory evaluation. These results indicated that the hot fill process was more efficient for sugarcane juice preservation in terms of sensory acceptance and physical-chemical changes, probably because of the thermal inactivation of the enzymes.
The objective of this work is to evaluate two thermal processes in order to obtain sugarcane (Sacharum ssp.) juice stable at room temperature in glass bottles. An experimental methodology was applied to obtain the best combination between pH and °Brix based on the sensory results. There was a tendency for a better sensory acceptance for pH > 4.0 and °Brix > 15. Two thermal processes were applied to sterilize the juice. Firstly, the juice was submitted to 141 °C /10 s, and then aseptically filled in glass bottles previously sterilized. In the second process, the juice was submitted to 110 °C /10 s and filled into glass bottles at 90 ± 5 °C. Physical-chemical changes, microbiological counts and sensory acceptance were evaluated during the storage at room temperature. The shelf life of aseptically processed juice was 30 days and 60 days for the hot filled juice based on the sensory evaluation. These results indicated that the hot fill process was more efficient for sugarcane juice preservation in terms of sensory acceptance and physical-chemical changes, probably because of the thermal inactivation of the enzymes.
| Reference Key |
silva2006foodavaliao
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| Authors | ;Karin Samorano da Silva;José de Assis Fonseca Faria |
| Journal | software - practice and experience |
| Year | 2006 |
| DOI |
10.1590/S0101-20612006000400007
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