Microflora, Sensory and Exudate Changes of Vacuum- or Nitrogen-Packed Veal Chucks Under Different Storage Conditions

Authors

  • B. H. LEE,

    1. Author Lee is affiliated with the Research Station, Agriculture Canada, St-Jean-sor-Richelieu, Québec, Canada J3B 6Z8.
    Search for more papers by this author
  • R. E. SIMARD,

    1. Authors Simard and Laleye are affiliated with Centre de recherche en nutrition and Oépartement de sciences et technologie des aliments, Univ. Laval, Ste-Foy, Québec, Canada G1K 7P4.
    Search for more papers by this author
  • L. C. LALEYE,

    1. Authors Simard and Laleye are affiliated with Centre de recherche en nutrition and Oépartement de sciences et technologie des aliments, Univ. Laval, Ste-Foy, Québec, Canada G1K 7P4.
    Search for more papers by this author
  • R. A. HOLLEY

    1. Author Holley is affiliated with the Food Research Institute, Agriculture Canada, Ottawa, Ontario, Canada K1A 0C6.
    Search for more papers by this author

  • Contribution No. 933, Research Station, and No. 547, Food Research Institute, Agriculture Canada.

  • We thank Ms L. Carmichael and Ms M.-H. Munsch for their technical assistance and statistical analysis, respectively. The authors are also thankful to the editorial board at Agriculture Canada Research Station (St-Jean, Que.) and to Ms Carole Noël for proofreading this manuscript. This investigation was supported by Agriculture Canada (Contract No. 04Sz.01531–9–0920).

ABSTRACT

Apart from increases in microflora number at —4°C under vacuum and at 0°C under nitrogen, there was in general no significant (P gt; 0.05) differences in numbers of lactobacilli, psychrotrophs, aerobes and anaerobes between vacuum- and nitrogen-packed veals during 49 days of storage at 3 and 7°C, regardless of dark and lighted displays. The initial psychrotrophs consisted primarily of Pseudomonas putida (> 72%) but by day 49 Lactobacillus spp. comprised at least 64% of the total in both atmospheres. Sensory and exudate data showed a highly significant (P < 0.05) difference due to the effect of storage time and temperature above 0°C. Nitrogen-packed veals exhibited a lower incidence of greening and exudate loss at 0, 3 and 7°C. Light generally had important effects on off-odor and exudate loss, irrespective of package types.

Ancillary