frutas estruturadas de umidade intermediária obtidas de polpas concentradas de abacaxi, manga e mamão restructured fruits of intermediate moisture from concentrated pineapple, mango and papaya pulps
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ID: 257722
2005
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Abstract
O objetivo deste trabalho foi estabelecer procedimento tecnológico para produção de fruta estruturada com elevados teores (450 a 700 g/kg) de polpas concentradas de abacaxi (39ºBrix), manga (35ºBrix) e mamão (16ºBrix), e quantidade mínima de sacarose, utilizando alginato ou pectina baixamente metoxilada. Glicose ou glicerol foi utilizado como supressor de atividade de água. Valores de firmeza de 240 g para géis de alginato e 1300 g para géis de pectina, determinados em Analisador de Textura TA.XT2, podem ser utilizados como indicadores para a estruturação, baseando-se nas propriedades de corte das frutas estruturadas. O processo de estruturação compreende a mistura sob vácuo (88 kPa) da polpa concentrada previamente aquecida a 60ºC e o hidrocolóide disperso em açúcar. Soluções de CaHPO e Glucona-Delta-Lactona foram adicionadas à mistura para favorecer a formação do gel. Os resultados mostraram a importância de elevar o pH de polpas de abacaxi e manga para 4,00 com NaOH. O alginato produziu 4 géis mais firmes e o glicerol foi o supressor de atividade de água mais eficiente. As frutas estruturadas de mamão com alginato apresentaram maior firmeza (acima de 3 kg). Os géis de abacaxi com alginato não puderam ser cortados com a faca, embora os géis de manga puderam ser cortados, eles aderiram à faca.
The objective of this research was to establish a technological procedure for the production of restructured fruits with high contents (450 to 700 g/kg) of concentrated pineapple (39ºBrix), mango (35ºBrix) and papaya (16ºBrix) pulps, and minimal amounts of sucrose using alginate or low methoxy pectin. Glycerol or glucose was used to suppress the water activity. Firmness values of 240 g for alginate gels or 1300 g for pectin gels, measured using the TA.XT2 Texture Analyser, can be used as indicators for structuring based on the cutting properties of the structured fruits. The structuring process includes the mixing under vacuum (88 kPa) of the concentrated pulp, previously heated to 60ºC, and the hydrocolloid dispersed in sugar. Solutions of CaHPO and Glucono-Delta-Lactone were added to the mixture to favor gel formation. The results show the importance of raising the pineapple 4 and mango pulp pH values to 4.00 with NaOH. Alginate produced the firmest gels and glycerol was the most efficient water activity suppressor. The papaya fruits structured with alginate presented greater firmness (above 3 kg). The pineapple gel with alginate could not be cut with a knife and although the mango gel could be cut, it adhered to the knife.
The objective of this research was to establish a technological procedure for the production of restructured fruits with high contents (450 to 700 g/kg) of concentrated pineapple (39ºBrix), mango (35ºBrix) and papaya (16ºBrix) pulps, and minimal amounts of sucrose using alginate or low methoxy pectin. Glycerol or glucose was used to suppress the water activity. Firmness values of 240 g for alginate gels or 1300 g for pectin gels, measured using the TA.XT2 Texture Analyser, can be used as indicators for structuring based on the cutting properties of the structured fruits. The structuring process includes the mixing under vacuum (88 kPa) of the concentrated pulp, previously heated to 60ºC, and the hydrocolloid dispersed in sugar. Solutions of CaHPO and Glucono-Delta-Lactone were added to the mixture to favor gel formation. The results show the importance of raising the pineapple 4 and mango pulp pH values to 4.00 with NaOH. Alginate produced the firmest gels and glycerol was the most efficient water activity suppressor. The papaya fruits structured with alginate presented greater firmness (above 3 kg). The pineapple gel with alginate could not be cut with a knife and although the mango gel could be cut, it adhered to the knife.
| Reference Key |
grizotto2005foodfrutas
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|---|---|
| Authors | ;Regina Kitagawa Grizotto;José Maurício de Aguirre;Hilary Castle de Menezes |
| Journal | software - practice and experience |
| Year | 2005 |
| DOI |
10.1590/S0101-20612005000400011
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| URL | |
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