Combined effect of ultrasound, mild heat shock and citric acid to retain greenness, nutritional and microbiological quality of minimally processed broccoli (Brassica oleracea L.): An optimization study

Minimally-processed pineapple stored under refrigerated conditions is highly perishable. We aimed to characterize the evolution of physicochemical, sensory and microbiological quality during cold storage. Pineapple batches were sampled from several locations in Reunion Island and then minimally processed. In the processing step, the variability of firmness and counts of yeasts and molds were observed. Moreover, correlations between the sampling season and pH and b* color component, as well as between fungal population and b* parameter were observed. During storage, the visual aspect of pineapple cuts changed to brown and shiny, whereas olfactive descriptors shifted from fruity descriptors and fresh to fermented, alcoholic and milky. The values for pH, TA and TSS did not significantly vary according to storage time. A decrease in firmness and C* color parameter was observed. Yeast and mold counts were significantly higher after 7 days of storage. The diversity in yeasts and molds was mainly dependent on the considered batches observed from PCR-DGGE profiles. Fungal species were isolated from spoiled pineapple cuts. The implication of Penicilllium citrtrinum, Talaromyces amestolkiae, Rhodotorula mucilaginosa, Saccharomyces cerevisiae, and Meyerozyma caribbica in the spoilage of minimally-processed pineapple cuts was further demonstrated.

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Combined Effect of Dipping in Oxalic or in Citric Acid and Low O2 Modified Atmosphere, to Preserve the Quality of Fresh-Cut Lettuce during Storage

Foods ◽

10.3390/foods9080988 ◽

2020 ◽

Vol 9 (8) ◽

pp. 988

Author(s):

Bernardo Pace ◽

Imperatrice Capotorto ◽

Michela Palumbo ◽

Sergio Pelosi ◽

Maria Cefola

Keyword(s):

Citric Acid ◽

Respiration Rate ◽

Modified Atmosphere Packaging ◽

Packaging Material ◽

Combined Effect ◽

Modified Atmosphere ◽

Iceberg Lettuce ◽

Fresh Cut ◽

Main Factor

Leaf edge browning is the main factor affecting fresh-cut lettuce marketability. Dipping in organic acids as well as the low O2 modified atmosphere packaging (MAP), can be used as anti-browning technologies. In the present research paper, the proper oxalic acid (OA) concentration, able to reduce respiration rate of fresh-cut iceberg lettuce, and the suitable packaging materials aimed to maintaining a low O2 during storage, were selected. Moreover, the combined effect of dipping (in OA or in citric acid) and packaging in low O2 was investigated during the storage of fresh-cut iceberg lettuce for 14 days. Results showed a significant effect of 5 mM OA on respiration rate delay. In addition, polypropylene/polyamide (PP/PA) was select as the most suitable packaging material to be used in low O2 MAP. Combining OA dipping with low O2 MAP using PP/PA as material, resulted able to reduce leaf edge browning, respiration rate, weight loss and electrolyte leakage, preserving the visual quality of fresh-cut lettuce until 8 days at 8 °C.

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The Influence of Added Egg Yolk on the Microbiological Quality of Hard-Cooked Eggs Stored in a Citric Acid/Sodium Benzoate Solution

Poultry Science ◽

10.3382/ps.0660861 ◽

1987 ◽

Vol 66 (5) ◽

pp. 861-865 ◽

Cited By ~ 3

Author(s):

J.S. BAILEY ◽

D.L. FLETCHER ◽

N.A. COX

Keyword(s):

Citric Acid ◽

Sodium Benzoate ◽

Microbiological Quality ◽

Egg Yolk

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