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Campos dos Goytacazes, Brazil

Correa S.F.,LCFIS | Oliveira J.G.,LCFIS | Santos W.C.,LCFIS | Souza A.F.,LCFIS | And 3 more authors.
Acta Horticulturae | Year: 2012

The present work shows the application of the photoacoustic spectrometer in the monitoring of the ethylene emission rate in passion fruit submitted to different types of atmosphere storage. Three types of modified atmosphere were applied: 1) 100% N2 and 0% O2 (MA1), 2) 97% N2 and 3% O2 (MA2) and 3) 94% N2 and 6% O2 (MA3). The respiratory rate and parameters of the skin color as CIE a, b and angle hue were monitored and correlated with the ethylene emission rate. The loss of mass was also evaluated. Results indicated that atmospheres with oxygen concentrations below 3% cause fruit damage, evident as fermentation and presence of fungus in the skin, while 6% oxygen led to a 2 day increased in shelf life. Source


Correa S.F.,LCFIS | Da Silva M.G.,LCFIS | Pereira T.,LCFIS | Almeida Jr. P.S.G.,LCFIS | And 3 more authors.
Acta Horticulturae | Year: 2012

Four postharvest hydrothermal treatments were applied on papaya fruit (Carica papaya L.) 'Golden' and the stress stimulated by the treatments was monitored by the ethylene (C2H4), carbon dioxide (CO 2) emission rates and fruit quality. The postharvest hydrothermal treatments consisted of submerging alternately the fruit into two water baths, the first one with water at a temperature of 49°C and the second at 12°C. An increase in the emission rates of both gaseous species (C 2H4 and CO2) was observed as a response to the stress. Typical quality parameters as pulp firmness, pH, titratable acidity and total soluble solids were simultaneously determined and correlated with the gases emitted from the fruits. Source

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