Fenólicos totais, polifenoloxidade e coloração em abacate 'Hass' submetido a radiação UV-C

Abstract

TOTAL PHENOLICS, POLYPHENOLOXIDASE AND COLORATION IN 'HASS' AVOCADO SUBMITTED TO UV-C RADIATIONABSTRACT -The effect of radiation UV-C was evaluated in Hass avocados, regarding the total phenolics content, polyphefenoloxidase (PPO) enzyme activity and coloration. The selected fruits were submitted to the radiation in light UV-C during 5, 10, 15 and 20 minutes being maintained under refrigeration (10 ± 1 ºC and 90±5% relative humidity), and evaluated for 15 days. For the total phenolics content and PPO there were no differences among treatments in the different times of submission to the UV-C light. Total phenolics content and PPO decreased during the experimental period. The values of brightness remained high (85.4 to 88.5) in the storage. The color values a * and b * decreased with the storage in a more intense way in the fruits submitted to the radiation UV-C. There were no significant correlations for the PPO, total phenolics content and coloration.

<b>Physicochemical characterization, antioxidant activity and total phenolic content in 'Gala' apples subjected to different UV-C radiation doses

“…Lower values of this parameter were noted with increasing storage time, indicating redder fruits. Cabia, Daiuto, Vieites, Fumes, and Carvalho (2011), who studied 'Hass' avocados subjected to different UV-C radiation doses, did not observe the influence of the dose on parameters, such as polyphenol oxidase activity, color and total phenolic content. Weight loss increased during the storage period for all treatments, reaching 9.26% during the last time period.…”

Novas cultivares de abacateiros na região Centro-Oeste do Estado de São Paulo, Brasil

“…Dentre as técnicas, são citadas o uso de diferentes temperaturas de armazenamento (ZAUBERMAN, JOBIN-DECOR, 1995), aplicação de ceras (JOYCE et al, 1995), tratamento térmico (TRECOMOLDI et al, 2014), uso de atmosfera modificada (VIEITIS; RUSSO; DAIUTO, 2014), uso de compostos voláteis (GLOWACZ et al, 2017) e irradiações (CABIA et al, 2011).…”