Radiação gama na conservação de caqui 'Giombo', destanizado e frigoarmazenado
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Data
2012-09-01
Autores
Vieites, Rogério Lopes [UNESP]
Magave Picanco, Nagela Farias [UNESP]
Daiuto, Érica Regina [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Fruticultura
Resumo
O caqui apresenta uma safra curta, sendo necessário estender seu período de comercialização utilizando técnicas adequadas de armazenamento. O objetivo deste trabalho foi avaliar o uso da radiação gama na qualidade pós-colheita de caquis 'Giombo' destanizados. Frutos colhidos meio-maduros e com aproximadamente 50 % da coloração verde, foram destanizados, acondicionados em bandejas de poliestireno expandido (EPS), revestidas por filme plástico de polietileno de baixa densidade (PEBD) e submetidos à radiação gama (60Co). Os frutos foram armazenados durante 35 dias, sob refrigeração (0±0,5 ºC e 85 ± 0,5% UR). Os tratamentos realizados foram: T1 - 0,0 kGy; T2 - 0,3 kGy; T3 - 0,6 kGy; T4 - 0,9 kGy; T5 - 1,2 kGy. As análises realizadas a cada 7 dias foram: perda de massa, atividade respiratória, teores de sólidos solúveis (SS), ácido ascórbico, acidez titulável (AT) e relação SS/AT. Os frutos submetidos à dose de 0,6 kGy apresentaram o menor percentual de perda de massa e produção de CO2 ao longo do período experimental. Os teores de SS e AT permaneceram estáveis e sem diferenças devido às doses de irradiação aplicadas. Os tratamentos com 0,3 KGy e 0,6 KGy foram os mais eficazes na manutenção da firmeza nos caquis. Nos teores de ácido ascórbico, observou-se redução ao longo do período experimental, sendo os menores valores apresentados para a maior dose de irradiação (1,2 KGy).
The persimmon presents a short harvest, being necessary to extend his commercialization period using appropriate storage techniques. The purpose of this work was to evaluate the use of the gamma radiation in the postharvest quality 'Giombo' persimmons without adstringency. Fruits were harvest middle-ripe, with approximately 50% of the green coloration and were submitted to the process of astringency removal, packed in expanded polystyrene (EPS) trays, covered by low densidy polyethylene (LDPE) plastic film and submitted the gamma radiation (60Co). The fruits were stored for 35 days, under refrigeration (0±0,5 ºC and 85 ± 0,5% of relative humidity). The evaluated treatments were: T1 - 0.0 kGy; T2 - 0.3 kGy; T3 - 0.6 kGy; T4 - 0.9 kGy; T5 - 1.2 kGy. The evaluated analyses every 7 days were: weight loss, respiratory activity, soluble solids (SS), ascorbic acid content, acidity titulável (AT), and relation SS/AT. The fruits submitted to the 0.6kGy presented the percentile smallest of weight loss and smaller CO2 production along the experimental period. The SS and AT content stayed stable and without difference among the irradiation applied. The treatments with 0.3 kGy e 0.6 kGy were the most effective in the maintenance of the persimmon firmness values. For the ascorbic acid content was observed reduction along the experimental period being the smallest values presented for the largest irradiation dose (1,2 KGy).
The persimmon presents a short harvest, being necessary to extend his commercialization period using appropriate storage techniques. The purpose of this work was to evaluate the use of the gamma radiation in the postharvest quality 'Giombo' persimmons without adstringency. Fruits were harvest middle-ripe, with approximately 50% of the green coloration and were submitted to the process of astringency removal, packed in expanded polystyrene (EPS) trays, covered by low densidy polyethylene (LDPE) plastic film and submitted the gamma radiation (60Co). The fruits were stored for 35 days, under refrigeration (0±0,5 ºC and 85 ± 0,5% of relative humidity). The evaluated treatments were: T1 - 0.0 kGy; T2 - 0.3 kGy; T3 - 0.6 kGy; T4 - 0.9 kGy; T5 - 1.2 kGy. The evaluated analyses every 7 days were: weight loss, respiratory activity, soluble solids (SS), ascorbic acid content, acidity titulável (AT), and relation SS/AT. The fruits submitted to the 0.6kGy presented the percentile smallest of weight loss and smaller CO2 production along the experimental period. The SS and AT content stayed stable and without difference among the irradiation applied. The treatments with 0.3 kGy e 0.6 kGy were the most effective in the maintenance of the persimmon firmness values. For the ascorbic acid content was observed reduction along the experimental period being the smallest values presented for the largest irradiation dose (1,2 KGy).
Descrição
Palavras-chave
Diospyrus kaki, Pós-colheita, Refrigeração, Adstringência, Diospyrus kaki, Postharvest, Refrigeration, Adstringency
Como citar
Revista Brasileira de Fruticultura. Sociedade Brasileira de Fruticultura, v. 34, n. 3, p. 719-726, 2012.