ABSTRACT
A vida-de-prateleira pode ser definida como um período de armazenamento em que produtos com alta qualidade inicial permanecem adequados para consumo. Para sua determinação, várias amostras devem ser submetidas a uma série de testes e examinadas durante um período de tempo até o limite de aceitação. O objetivo deste trabalho foi avaliar a qualidade química e sensorial de mamões minimamente processados, submetidos aos tratamentos com e sem sementes, mantidos sob refrigeração.(...)Os resultados mostraram que os sólidos solúveis totais, pH e acidez total titulável não apresentaram diferenças estatisticamente significativas no teste de F (p<0,05) durante os 15 dias de armazenamento. A avaliação sensorial indicou que houve desidratação parcial das sementes observados no tratamento com semente e do endocarpo para o tratamento sem semente no 6 dia de armazenamento. (...) Pelas analises realizadas, a presença de sementes em Carica papaya L. cultivar Havaí, minimamente processado,melhora as características sensoriais dos frutos contribuindo para maior tempo de vida de prateleira.
Subject(s)
Carica , Cooled Foods , Food Analysis , Food Storage , Consumer Product Safety , Food QualityABSTRACT
In this study two different crosses involving the wing cell markers mwh and flr³ (standard (ST) cross and high bioactivation (HB) cross, the latter being characterized by a high constitutive level of cytochrome P450 which leads to an increased sensitivity to a number of promutagens and procarcinogens) were used to investigate the modulatory effects of ascorbic acid (AA) combined with the antitumor agent doxorubicin (DXR) in Drosophila melanogaster. We observed that the two different concentrations of AA (50 or 100 mM) had no effect on spots frequencies, while DXR treatments (0.2 or 0.4 mM) gave positive results for all types of spots, when compared to negative control. For marker-heterozygous (MH) flies, a protective effect was observed with the lower concentration of AA (50 mM) that was able to statistically decrease the frequency of spots induced by DXR (0.2 mM), while an enhanced frequency of spots induced by DXR was observed with the higher concentration of AA (100 mM), when compared to DXR treatment (p < 0.05). These results suggest that AA may interfere with free radicals generated by DXR and with other possible reactive metabolites. The efficiency of AA in protecting the somatic cells of D. melanogaster against mutation and recombination induced by DXR is dependent on the dose used and the protection is directly related to the activity of cytochrome P450 enzymes.