Resumo: A jabuticabeira é uma frutífera nativa do Brasil, que possui frutos com período de utilização bastante reduzido devido a sua alta perecibilidade. Além disso, a jabuticaba é um fruto que contem grande valor nutricional, apresentando em sua composição alto teor de antocianinas, pigmentos naturais solúveis em água. Visando o aumento do vida de útil deste fruto aplicou-se cobertura comestível a base de quitosana, formando barreira contra gases e proporcionando ação antifúngica. As coberturas foram preparadas com quitosana, cloreto de cálcio, água destilada e acidificadas com acido lático. As jabuticabas foram imersas em solução de cobertura, secas e armazenadas sob temperatura de refrigeração por 360 horas. Durante a armazenagem foram avaliadas, a cada 72h em triplicata, quanto a perda de massa, teor de sólidos solúveis, teor de antocianinas, acidez, pH e cor. Os sólidos solúveis, pH e acidez titulável não alcançaram diferença significativa entre os frutos com a cobertura de quitosana e sem a mesma para a extensão da vida útil. A perda de massa em 288horas teve uma diferença de 0,45% em relação as frutas sem cobertura. Em relação a cor, os frutos ficaram na faixa de cor violeta. Os frutos com cobertura apresentaram maior saturaçãoe se tornaram mais escura devido a queda nos índices de luminosidade. Quanto ao teor de antocianinas houve uma redução de 24,61% a menos que os frutos que não receberam a cobertura de quitosana.Palavras-chave: antocianinas, Myrciaria jaboticaba, quitosana, revestimentos comestíveis. Abstract:The jabuticabeira is a fruit native to Brazil, which has fruits with a very short period of use due to its high perishability. In addition, the jabuticaba is a fruit that contains great nutritional value, presenting in its composition high content of anthocyanins, natural pigments soluble in water. Aiming to increase the useful life of this fruit was applied edible cover based on chitosan, forming a barrier against gases and providing antifungal action. The coatings were prepared with chitosan, calcium chloride, distilled water and acidified with lactic acid. The jabuticabas were immersed in cover solution, dried and stored under refrigeration temperature for 15 days. During storage were evaluated every 72 hours in triplicate for loss of mass, soluble solids content, anthocyanin content, acidity, pH and color. Soluble solids, pH and titratable acidity did not reach a significant difference between the fruits with the chitosan cover and without it for the extension of the useful life. The loss of mass in 288 hours had a difference of 0.45% in relation to uncovered fruits. Regarding color, the fruits were in the violet color range. The fruits with cover showed higher saturation and became darker due to the drop in luminosity indexes. As for the content of anthocyanins there was a reduction of 24.61% less than the fruits that did not receive the chitosan cover.Keywords: Anthocyanins, Myrciaria jaboticaba, chitosan, edible coatings. IntroduçãoA jabuticaba (Myrciaria jaboticaba) é uma fruta típica da...
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