A novel approach for calculating shelf life of minimally processed vegetables

2006 ◽  
Vol 106 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Maria Rosaria Corbo ◽  
Matteo Alessandro Del Nobile ◽  
Milena Sinigaglia
Keyword(s):  
Shelf Life ◽  
Minimally Processed ◽  
Novel Approach ◽  
Minimally Processed Vegetables

Microbiological and Sensory Quality of Fresh Ready-to-Eat Artichoke Hearts Packaged under Modified Atmosphere

2017 ◽  
Vol 80 (5) ◽  
pp. 740-749 ◽  
Author(s):  
Nuria García-Martínez ◽  
Pedro Andreo-Martínez ◽  
Luis Almela ◽  
Lucía Guardiola ◽  
José A. Gabaldón
Keyword(s):  
Shelf Life ◽  
Storage Temperature ◽  
Modified Atmosphere Packaging ◽  
Threshold Value ◽  
Plate Count ◽  
Vacuum Impregnation ◽  
Modified Atmosphere ◽  
Minimally Processed ◽  
Sensory Qualities ◽  
Minimally Processed Vegetables

ABSTRACT In recent years the sales of minimally processed vegetables have grown exponentially as a result of changes in consumer habits. The availability of artichoke buds as a ready-to-eat product would be, therefore, highly advantageous. However, minimally processed artichoke hearts are difficult to preserve because of their rapid browning and the proliferation of naturally occurring microorganisms. We developed artichoke hearts prepared as ready-to-eat products that maintain the characteristics of the fresh product. The microbiological stability, sensory qualities, and shelf life of the processed artichoke hearts were determined. During the shelf life, Salmonella, Listeria monocytogenes, and Escherichia coli counts were below the limits legally established by European regulations for minimally processed vegetables. The pH played an important role in microbial growth. Artichoke hearts had lower microbial counts in experiments conducted at pH 4.1 than in experiments conducted at pH 4.4, although the recommended threshold value for total plate count (7 log CFU/g) was not exceeded in either case. Sensory parameters were affected by the microorganisms, and artichoke products at lower pH had better sensory qualities. Vacuum impregnation techniques, modified atmosphere packaging, and low storage temperature were very effective for increasing the shelf life of minimally processed artichokes. The average shelf life was approximately 12 to 15 days.

scholarly journals A Fast, Reliable, and Sensitive Method for Detection and Quantification ofListeria monocytogenesandEscherichia coliO157:H7 in Ready-to-Eat Fresh-Cut Products by MPN-qPCR

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Pasquale Russo ◽  
Giuseppe Botticella ◽  
Vittorio Capozzi ◽  
Salvatore Massa ◽  
Giuseppe Spano ◽  
...  
Keyword(s):  
Shelf Life ◽  
Pathogenic Bacteria ◽  
Limit Of Detection ◽  
Raw Materials ◽  
Minimally Processed ◽  
E Coli ◽  
Biochemical Assays ◽  
Fresh Cut ◽  
Minimally Processed Vegetables ◽  
Detection And Quantification

In the present work we developed a MPN quantitative real-time PCR (MPN-qPCR) method for a fast and reliable detection and quantification ofListeria monocytogenesandEscherichia coliO157:H7 in minimally processed vegetables. In order to validate the proposed technique, the results were compared with conventional MPN followed by phenotypic and biochemical assays methods. WhenL. monocytogenesandE. coliO157:H7 were artificially inoculated in fresh-cut vegetables, a concentration as low as 1 CFU g−1could be detected in 48 hours for both pathogens. qPCR alone allowed a limit of detection of 101 CFU g−1after 2 hours of enrichment forL. monocytogenesandE. coliO157:H7. Since minimally processed ready-to-eat vegetables are characterized by very short shelf life, our method can potentially address the consistent reduction of time for microbial analysis, allowing a better management of quality control. Moreover, the occurrences of both pathogenic bacteria in mixed salad samples and fresh-cut melons were monitored in two production plants from the receipt of the raw materials to the early stages of shelf life. No sample was found to be contaminated byL. monocytogenes. One sample of raw mixed salad was found positive to an H7 enterohemorrhagic serotype.

Decontamination Methods to Prolong the Shelf-life of Minimally Processed Vegetables, State-of-the-art

2008 ◽  
Vol 48 (6) ◽  
pp. 487-495 ◽  
Author(s):  
Vicente M. Gómez-López ◽  
Peter Ragaert ◽  
Johan Debevere ◽  
Frank Devlieghere
Keyword(s):  
Shelf Life ◽  
State Of The Art ◽  
Minimally Processed ◽  
Minimally Processed Vegetables

scholarly journals Combined application of essential oils from Origanum vulgare L. and Rosmarinus officinalis L. to inhibit bacteria and autochthonous microflora associated with minimally processed vegetables

2011 ◽  
Vol 44 (5) ◽  
pp. 1541-1548 ◽  
Author(s):  
Geíza Alves de Azeredo ◽  
Tânia Lúcia Montenegro Stamford ◽  
Pollyana Campos Nunes ◽  
Nelson Justino Gomes Neto ◽  
Maria Elieidy Gomes de Oliveira ◽  
...  
Keyword(s):  
Essential Oils ◽  
Rosmarinus Officinalis ◽  
Origanum Vulgare ◽  
Minimally Processed ◽  
Combined Application ◽  
Rosmarinus Officinalis L ◽  
Minimally Processed Vegetables

Biodegradable and Edible Film Based on Persimmon (Diospyros kaki L.) Used as a Lid for Minimally Processed Vegetables Packaging

2021 ◽  
Vol 14 (4) ◽  
pp. 765-779
Author(s):  
Julia Rabelo Vaz Matheus ◽  
Rebeca Melgaço de Assis ◽  
Thiago Ramos Correia ◽  
Mônica Regina da Costa Marques ◽  
Marcia Christina Amorim Moreira Leite ◽  
...  
Keyword(s):  
Edible Film ◽  
Diospyros Kaki ◽  
Minimally Processed ◽  
Minimally Processed Vegetables

scholarly journals Expiration Date of Ready-to-Eat Salads: Effects on Microbial Load and Biochemical Attributes

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 941
Author(s):  
Panayiota Xylia ◽  
George Botsaris ◽  
Panagiotis Skandamis ◽  
Nikolaos Tzortzakis
Keyword(s):  
Shelf Life ◽  
Foodborne Pathogens ◽  
Carbon Dioxide Production ◽  
Microbial Load ◽  
Expiration Date ◽  
Postharvest Management ◽  
Minimally Processed Vegetables ◽  
Yeasts And Molds ◽  
Staphylococcus Spp ◽  
Spoilage Microorganisms

When minimally processed vegetables reach their expiration date, expose an increased microbial load. This includes mainly spoilage microorganisms but also foodborne pathogens, thus affecting the quality and safety of highly consumed ready-to-eat salads. A total of 144 ready-to-eat salads from the Cypriot market were analyzed in an attempt to determine the effects of the expiration date on the microbial load and plant metabolic variables of the salads. Possible correlations between them were also investigated for the first time. Furthermore, the impacts of the season (winter, summer), salad producing companies and type of salad and/or their interactions with the tested parameters were investigated. Results revealed that the microbial load (mainly spoilage microorganisms, such as Pseudomonas spp., yeasts and molds) increased towards the end of the shelf life. The microbial load was differentiated among the five salad producers and/or the salad types, highlighting the importance of a common and safe sanitation-processing chain in the preparation of ready-to-eat salads. Summer was the season in which Escherichia coli counts were found to be higher for plain lettuce, while Staphylococcus spp. was increased numbers for the lettuce+endive/radicchio, lettuce+rocket and lettuce+chives type of salads. Additionally, an increased Staphylococcus spp. was observed for plain rocket salads in winter. All samples examined were found negative for Salmonella enterica and Listeria monocytogenes. Moreover, carbon dioxide production and damage indexes (hydrogen peroxide and lipid peroxidation) increased on expiration date on both winter and summer seasons, indicating plant tissue stress at the end of shelf life. These findings indicate that the expiration date and relevant shelf life of processed vegetables are important parameters to be considered when postharvest management is applied to these products, ensuring safety and quality.

Multivariate accelerated shelf-life testing: a novel approach for determining the shelf-life of foods

2006 ◽  
Vol 20 (1-2) ◽  
pp. 76-83 ◽  
Author(s):  
André M. K. Pedro ◽  
Márcia M. C. Ferreira
Keyword(s):  
Shelf Life ◽  
Life Testing ◽  
Novel Approach

scholarly journals Influence of chitosan coatings with citric essential oil on the shelf-life of minimally processed mango (Mangifera indica L.)

2015 ◽  
Vol 68 (2) ◽  
pp. 7679-7688
Author(s):  
Fabián Rico Rodríguez ◽  
Carolina Gutiérrez Cortés ◽  
Consuelo Díaz Moreno
Keyword(s):  
Weight Loss ◽  
Ascorbic Acid ◽  
Shelf Life ◽  
Mangifera Indica ◽  
The Other ◽  
Soluble Solids ◽  
Total Acidity ◽  
Minimally Processed ◽  
Color Changes ◽  
Sensory Acceptance

Demand for minimally processed fruits have increased due to their nutritional value and an increasing change in consumption habits. Physicochemical, microbiological, structural and sensory changes were determined in minimally processed mangoes (MPM) with chitosan (CH) edible coatings and lemon and orange essential oils (EOL). The MPM was first dipped in citric acid and a texturizing solution and then dipped in CH and lemon or orange EOL coatings. Weight loss, sensory acceptance, total soluble solids, total acidity, ascorbic acid, color changes, firmness and elasticity, and microbiological changes were quantified for 11 days of refrigerated storage. The CH and lemon EOL coating had more acceptance than the other treatments. No differences were found (p>0.05) for weight loss, total acidity, ascorbic acid, firmness or elasticity. There was a high amount of total phenols due to the EOL composition, as well as a high antioxidant capacity in the early days of storage. This characteristic decreased in the final days of the study. There was a decrease in the microbial charge for the lemon EOL treatment, as compared to the other samples. The CH and lemon EOL coating helped to maintain the shelf-life of the MPM for 11 days of storage without affecting the sensory acceptance. The CH and Orange EOL coating did not have an effect on the MPM physicochemical attributes; however, the sensory acceptance was negatively affected with off-flavors conferred to the MPM.

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