Loading...
2 results
Search Results
Now showing 1 - 2 of 2
- Quality of grated carrot (var. Nantes) packed under vacuumPublication . Rocha, Ada MCN; Ferreira, João FFC; Silva, Ângelo MM; Almeida, Gonçalo N.; Morais, Alcina M. M. B.The quality of grated carrot (variety Nantes) was evaluated throughout 10 days of storage in two different atmospheres: air and vacuum at 2 ◦C. The parameters of quality were microbiological and physico-chemical. Sensory evaluation of vacuum-packed grated carrots was performed after the microbiology study. The objective was to study the use of a vacuum for preservation of this type of product. The use of a vacuum was sufficiently promising with respect to the capacity to extend the shelf life of grated carrot by reducing microbial load and by minimising physico-chemical changes. The shelf life of grated carrot under vacuum was extended to 8 days at 2 ◦C.
- Preservation of fresh-cut ‘Cavendish’ banana coated with carrageenan and in controlled atmospherePublication . Rocha, Margarida; Vaz, Ana Luísa; Raposo, Maria Filomena de Jesus; Almeida, Gonçalo N.; Morais, Alcina M. M. B.The objective was to study the effect of two controlled atmosphere (CA) compositions – 3% O2 and 6% CO2, and 3%O2 and 10% CO2 – on total counts of microorganisms at 30°C and 7°C, count of yeasts and moulds, count of enterobacteriaceae, and count of lactic acid bacteria of carrageenan coated fresh-cut ‘Cavendish’ banana. Bananas were previously submitted (or not) to a chemical dip of 1% calcium chloride, 0.5% ascorbic acid and 0.75% L-cystein. After a nine-day storage at 6°C, samples that had been chemically treated and submitted to CA with 10% CO2 presented total aerobic plated count (at 30°C and 7°C), and yeasts and moulds count lower than other samples. The chemical dip improved the antimicrobial capacity of the coating associated to the controlled atmosphere conditioning, especially with 10% CO2. Fresh-cut banana coated with carrageenan and previously chemically treated (or not) was safe during the nine-day storage at 6°C, with microbial counts below the limits referred in the literature. It is important for food industry to know the best conditions for storage in order to produce safe products.