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Effects of modified atmosphere on shelf-life of carrot juice

Publiceringsår: 2004
Språk: Engelska
Sidor: 131-137
Publikation/Tidskrift/Serie: Food Control
Volym: 15
Nummer: 2
Dokumenttyp: Artikel
Förlag: Elsevier Ltd


The effects of de-aeration and modification of the headspace atmosphere on carrot juice shelf-life were investigated. The shelf-life was defined by microbial growth, determined by isothermal calorimetry and plate counts. Compared with storage under air, de-aeration of carrot juice by helium or nitrogen bubbling, followed by flush packaging had no effects on shelf-life. Similar treatment with carbon dioxide, giving a carbonated drink, prolonged the shelf-life by up to 250%. This effect could not be explained by the change in pH to 5.6, since the shelf-life was not prolonged by the addition of hydrochloric acid until pH <4.5. Both the concentrations of H+ and of dissolved CO2 were correlated to the shelf-life of fresh carrot juice; higher concentrations giving shorter shelf-lives. The concentration of dissolved CO2 was also linearly correlated to the peak thermal power. (C) 2003 Elsevier Ltd. All rights reserved.



  • Materials Engineering
  • Food Engineering


  • ISSN: 0956-7135

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