injúrias mecânicas e seus efeitos na qualidade de mamões golden mechanical injuries and the effects on the quality of golden papaya fruits

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ID: 166985
2010
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Abstract
O objetivo do trabalho foi identificar as injúrias mecânicas que ocorrem em mamões 'Golden' e avaliar seus efeitos na qualidade dos frutos armazenados a 22ºC e 85% UR durante 10 dias. As injúrias identificadas como abrasão, corte e amassado foram reproduzidas nos frutos. As abrasões foram provocadas com lixa grão 200, numa área de 6cm². Os cortes foram realizados com incisões de 30 mm de comprimento e 5 mm de profundidade. O amassado foi provocado pelo impacto dos frutos, que foram deixados cair de uma altura de 2 m. Cada fruto recebeu 2 injúrias em lados opostos, na região de maior diâmetro. Mamões intactos foram utilizados como controle. A região danificada pela abrasão não desenvolveu cor amarelo-alaranjada; ocorreu escurecimento da casca, comprovado pelos menores valores de luminosidade e cromaticidade. Abrasão e impacto levaram a maior redução da firmeza da polpa e perda de massa. Imagens de ressonância magnética revelaram que frutos danificados pelas injúrias perderam sua integridade, o que foi identificado por áreas claras devido à presença de água livre. A qualidade de mamões 'Golden' é prejudicada por injúrias mecânicas, principalmente pelo impacto pela abrasão.
This work aimed to identify the mechanical injuries that occur in 'Golden' papaya fruits, and to evaluate the injuries effects on the quality of the fruits at early ripening stage and storage at 22ºC and 85% RH for 10 days. The mechanical injuries identified were abrasion, cuts and bruises. Abrasion was caused by 200 mesh sandpaper in a 6 cm² of peel surface area. Cut injury was obtained by cutting fruits at 30mm length and 5mm depth. Bruises were produced in the papayas by impact, which were dropped from 2 m height onto a hard surface. Each fruit were injured twice in the opposite sides at the widest diameter region. Intact fruits were considered as control. Injured areas by abrasion did not develop the typical yellow color. The luminosity and chroma values were lower in injured areas. Abrasion and impact injuries were responsible for flesh firmness decrease and higher water loss. Magnetic resonance images showed that injured papaya fruits lost their integrity. In the injured areas were visualized clear region due to free water content. The quality of 'Golden' papaya fruits is affect by mechanical injuries, mainly due to the impact and the abrasion injuries.
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Authors ;Ana Elisa de Godoy;Angelo Pedro Jacomino;Elaine Costa Cerqueira-Pereira;Anita de Souza Dias Gutierrez;Carlos Eduardo Morais Vieira;Lucimara Aparecida Forato
Journal technocom
Year 2010
DOI
DOI not found
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452010000300006
Keywords
impact abrasion postharvest cutplant culture

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