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- Escurecimento enzimático de maçã e pêra: efeito dos tratamentos químico e térmicoPublication . Moura, S.P.G.C.; Almeida, N.; Pauperio, J.; Sousa, P.; Morais, A. M. M. B.
- Shelf life of minimally processed apple (cv. Jonagored) determined by colour changesPublication . Rocha, A. M. C. N.; Morais, A. M. M. B.Physical, chemical and sensory changes of cut apple (cv. Jonagored) stored in the dark at 4 °C were evaluated. Colour was found to be the critical parameter for this product. Apple cubes underwent severe surface browning primarily during the initial days of storage. The shelf-life of cut apple was therefore very limited, to three days maximum. Sensory analyses and objective quality evaluations of cut apple were considered highly correlated in terms of colour and flavour, especially with respect to fructose and sucrose, showing that the selected sensory attributes were good indicators of overall fruit quality.
- Physical and chemical quality characteristics of strawberries after storage are reduced by a short delay to coolingPublication . Nunes, M. C. N.; Brecht, J. K.; Morais, A. M. M. B.; Sargent, S. A.Chandler’, ‘Oso Grande’ and ‘Sweet Charlie’ strawberries were forced-air precooled after delays of 0 or 6 h at 30 °C to study the effect of delaying precooling on physical and chemical quality characteristics of strawberry fruit. Fruit pulp temperatures were equilibrated to 30 °C prior to the start of each experiment to minimise water loss differences between treatments. Evaluations were made after storage for one week at 1 °C plus one day at 20 °C. Delaying the start of precooling resulted in about 50% greater water loss than in control fruit, which was evident as increases in superficial shrivelling. Tissue firmness values were also 14–22% lower in fruit from the delayed treatment. Fruits were darker (lower L* value), less bright (lower chroma) and apparently less red (lower a* value) with the cooling delay, although hue angle was also lower, which may reflect the occurrence of browning. No significant differences in pH were observed in these experiments, but titratable acidity was slightly lower with the delay to cooling. Delaying precooling also caused increased losses of ascorbic acid, soluble solids, fructose, glucose and sucrose compared to controls. In spite of differences related to harvest time and the variability among cultivars, the general responses were quite similar and illustrate the importance of rapid precooling and subsequent storage at low temperature for maintenance of acceptable appearance, texture and nutritive value of strawberries.
- Controlled atmosphere storage for preservation of Salicornia ramosissimaPublication . Raposo, M. F.; Morais, R. M. S. C.; Morais, A. M. M. B.Salicornia is a halophytic plant that grows near salt marshes and salted wetlands, very rich in vitamins, minerals and highly unsaturated oils. Because of its biochemical composition and despite salinity, Salicornia is considered a gourmet product. Since stems present a short shelf life, the aim of this work was to evaluate the effect of controlled atmosphere on quality of Salicornia ramosissima during four weeks at 4°C. Vitamin C and chlorophyll contents were determined, and microbiological and sensory analyses were performed. Salicornia shoots preserved better the visual appearance and L-ascorbic acid for three weeks of storage under CA with 3% oxygen and 10% carbon dioxide, although chlorophyll was better preserved in air. All samples were microbiologically safe during all storage. CA storage, especially in 3% oxygen and 10% carbon dioxide seems to be a good method to preserve Salicornia ramosissima shoots
- Colour changes of three different strawberry cultivars: sweet charlie, oso grande and chandler, during storagePublication . Brecht, J. F.; Sargent, S. A.; Morais, A. M. M. B.
- PPO activity of pear reduced by ca storagePublication . Morais, A. M. M. B.; Ferreira, J. P. M.; Morais, R. M. S. C.
- Influence of delayed CA storage on ascorbic acid content and brown-heart incidence in 'Rocha' pearPublication . Morais, A. M. M. B.; Avelar, M. L.; Rodrigues, A. C.
- Effects of delays to cooling and packaging on strawberry qualityPublication . Brecht, J. F.; Sargent, S. A.; Morais, A. M. M. B.; Nunes, M. C. N.
- Quality evaluation of tomato (cv. Bufalo) stored under controlled atmospherePublication . Nunes, M. C. N.; Morais, A. M. M. B.; Brecht, J. K.; Sargent, S. A.
- Physicochemical and sensorial characterization of a new variety of apple (cv. Jonagored)Publication . Rocha, A. M. C. N.; Morais, A. M. M. B.