RESUMO-Este trabalho teve como objetivo avaliar a eficiência da cera de carnaúba na conservação pós-colheita do caqui cv. Giombo. Os tratamentos consistiram do tratamento-controle e rápida imersão nas soluções contendo 12,5; 25 e 50 % do produto comercial Meghwax ECF 100 ® , que é uma emulsão de cera de carnaúba não-iônica a 30 %. Após a secagem, os frutos foram armazenados a 4ºC ± 1ºC e 80 % de umidade relativa. As avaliações foram realizadas em intervalos de 15 dias de conservação em câmara fria, seguidos de 4 dias à temperatura de 20 ± 1ºC, simulando o período de comercialização. As variáveis analisadas foram: firmeza de polpa; sólidos solúveis; acidez titulável; pH; teor de ácido ascórbico, fenóis e perda de massa fresca. O uso de cera de carnaúba, independentemente da concentração utilizada, diminuiu a perda de massa dos frutos em até 7,8 % em armazenagem por 60 dias em câmara fria, seguido de quatro dias em temperatura ambiente. A imersão dos frutos em solução com 12,5% de cera foi eficiente na manutenção do teor de ácido ascórbico e da firmeza, prolongando o tempo de armazenamento por 6 dias. Com o decorrer do armazenamento, houve decréscimo da acidez e aumento do pH. Termos para indexação: Diospyrus kaki, pós-colheita, perda de massa. USE OF WAX IN 'GIOMBO' PERSIMMON COLD STOREDABSTRACT-This research had the objective of evaluating the efficiency of the "carnaúba" wax in post-harvest of persimmon fruits (Diospyros kaki), cv. Giombo. The treatments were the rapid immersion of fruits into solutions containing 12.5, 25 and 50 % of the commercial product Meghwax ECF 100®, being a 30 % non ionic emulsion of carnaúba wax. After drying, fruits were stored at 4 ºC and 80 % RH. Chemical and physical characteristics of the fruits were measured throughout sixty days, at fifteen day intervals, followed by a 4-day period at 20 ºC simulating commercialization periods. The pulp firmness, pH, soluble solids, titratable acidity, water loss, tannins and ascorbic acid contents were evaluated. The use of carnaúba wax, regardless of the concentration, diminished the loss of fresh mass of the fruits at up to 7.8 % during storage periods of 60 days under cold chamber conditions, followed by a 4-day period at 20 ºC. The immersion of the fruits into 12.5 % of wax solutions was efficient to reduce losses of ascorbic acid and pulp firmness, extending therefore the storage period in 6 days. Throughout the time and ripening of the fruits, reductions of the acidity and increases of pH were also observed in the current study.
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