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- Phenolic compounds in "rocha" pear after storage in controlled atmospherePublication . Galvis-Sanchez, A. C.; Morais, Alcina M. M. B.
- Physicochemical and Sensory Evaluation of ‘Rocha’ Pear Following Controlled Atmosphere StoragePublication . Galvis-Sánchez, A. C.; Fonseca, S. C.; Morais, A. M. M. B.; Malcata, F. XavierThe effects of several processing factors (storage time, time in the open air at room temperature, and overhead concentrations of O2 and CO2) on color, firmness, polyphenol oxidase (PPO) activity, and sensory attributes of pears (cv. Rocha) grown in 2 locations were studied using a multiple linear regression model. Backward elimination (F ≥ 0.005) was used to assess the significant factors. Extended storage time, long-time exposure at room temperature, and high O2 concentration played major roles on color changes assessed instrumentally and further confirmed by a sensory panel. Firmness was strongly affected by storage time and by time in the open air at room temperature. Finally, PPO activity was dependent on the growing location.
- Quantification of chlorogenic acid and polyphenoloxidase activity in ‘Rocha’ pear after CA long storagePublication . Galvis-Sánchez, A. C.; Morais, A. M. M. B.; Malcata, F. X.The effect of storage time and prevailing storage conditions on the phenolic content and the polyphenol oxidase (PPO) activity of ‘Rocha’ pear were evaluated throughout 9 months of storage. Chlorogenic acid was the dominant phenolic compound quantified in the pulp. Storage time and conditions influenced the acid content and the PPO activity, but a clear tendency could not be observed during storage. By 7 months of storage, the chlorogenic acid content was higher in pears stored under 3%(v/v) O2 + 1.5%(v/v) CO2 than under the other storage conditions. By 9 months of storage, the lowest content of chlorogenic acid was found in pears stored under air. Storage under high CO2 levels was associated with high PPO activities, so it may be a limiting factor in attempts to extend the storage life of ‘Rocha’ pear
- Polyphenoloxidase and pectinmethylesterase activities in pear after controlled atmosphere storagePublication . Galvis-Sanchez, A. G.; Morais, A. M. M. B.