| Title: | Effect of O(2)-CO(2) enriched atmospheres on microbiological growth and volatile metabolite production in packaged cooked peeled gray shrimp (Crangon crangon) |
| Author(s): | Noseda B; Goethals J; De Smedt L; Dewulf J; Samapundo S; Van Langenhove H; Devlieghere F; |
| Address: | "Laboratory of Food Microbiology and Food Preservation (LFMFP), Ghent University, Coupure Links 653, 9000 Ghent, Belgium. bert.noseda@ugent.be" |
| DOI: | 10.1016/j.ijfoodmicro.2012.09.018 |
| ISSN/ISBN: | 1879-3460 (Electronic) 0168-1605 (Linking) |
| Abstract: | "This study evaluated the effect of modified atmospheres (MAs) with different O(2) concentrations on microbial growth and volatile metabolite production in gray shrimp (Crangon crangon) during storage at 4 degrees C. Eight MAs were evaluated in total. Four of the MAs evaluated were without CO(2): 0/0/100, 0/10/90, 0/30/70, 0/50/50 (% CO(2)/O(2)/N(2)) whilst the other four MAs all contained 50% CO(2): 50/0/50, 50/10/40, 50/30/20, 50/50/0 (% CO(2)/O(2)/N(2)). Volatile spoilage metabolites were identified by thermal desorption GC-MS and quantified during storage by selective ion flow tube mass spectrometry (SIFT-MS). In comparison to microbial growth observed with an atmosphere of 100% N(2), microbial growth was stimulated by the addition of O(2) in the MAP in the absence of CO(2.) Under these conditions the total psychrotrophic counts exceeded 7 log cfug(-1) after just 3 days of storage. However, in the presence of 50% CO(2) the total psychrotrophic count exceeded 7 log cfug(-1) after 5 days of storage. The combination of 50% CO(2) and 50% O(2) significantly inhibited microbial growth. For this MA condition, a diminishing effect on the production of metabolites was also observed, especially for amines and sulfur compounds, which constituted the major fraction of components causing the offensive odor" |
| Keywords: | "Animals Bacteria/*growth & development/metabolism Carbon Dioxide/metabolism Colony Count, Microbial Crangonidae/*microbiology Food Contamination/analysis Food Handling Food Microbiology Food Packaging/*methods Humans Nitrogen/metabolism Oxygen/metabolism;" |
| Notes: | "MedlineNoseda, Bert Goethals, Joke De Smedt, Lies Dewulf, Jo Samapundo, Simbarashe Van Langenhove, Herman Devlieghere, Frank eng Research Support, Non-U.S. Gov't Netherlands 2012/11/13 Int J Food Microbiol. 2012 Nov 1; 160(1):65-75. doi: 10.1016/j.ijfoodmicro.2012.09.018. Epub 2012 Sep 28" |
