Efficiency of N2 Gas Flushing Compared to the Lactoperoxidase System at Controlling Bacterial Growth in Bovine Raw Milk Stored at Mild Temperatures

Show full item record



Permalink

http://hdl.handle.net/10138/167438

Citation

Munsch-Alatossava , P , Quintyn , R , De Man , I , Alatossava , T & Gauchi , J-P 2016 , ' Efficiency of N 2 Gas Flushing Compared to the Lactoperoxidase System at Controlling Bacterial Growth in Bovine Raw Milk Stored at Mild Temperatures ' Frontiers in Microbiology , vol. 7 , 839 . DOI: 10.3389/fmicb.2016.00839

Title: Efficiency of N2 Gas Flushing Compared to the Lactoperoxidase System at Controlling Bacterial Growth in Bovine Raw Milk Stored at Mild Temperatures
Author: Munsch-Alatossava, Patricia; Quintyn, Romanie; De Man, Ingrid; Alatossava, Tapani; Gauchi, Jean-Pierrre
Contributor: University of Helsinki, Department of Food and Nutrition
University of Helsinki, Department of Food and Nutrition
Date: 2016-06-02
Language: eng
Number of pages: 10
Belongs to series: Frontiers in Microbiology
ISSN: 1664-302X
URI: http://hdl.handle.net/10138/167438
Abstract: To prevent excessive bacterial growth in raw milk, the FAO recommends two options: either cold storage or activation of the lactoperoxidase system (LPs/HT) in milk with the addition of two chemical preservatives, hydrogen peroxide (H) and thiocyanate (T). N-2 gas flushing of raw milk has shown great potential to control bacterial growth in a temperature range of 6-12 degrees C without promoting undesired side effects. Here, the effect of N-2 gas (N) was tested as a single treatment and in combination with the lactoperoxidase system (NHT) on seven raw milk samples stored at 15 or 25 degrees C. For the ratio defined as bacterial counts from a certain treatment/counts on the corresponding control, a classical Analyse of Variance (ANOVA) was performed, followed by mean comparison with the Ryan-Einot-Gabriel-Welsch multiple range test (REGWQ). Altogether, the growth inhibition was slightly but significantly higher at 25 degrees C than at 15 degrees C. Except for one sample, all ratios were lower for HT than for N alone; however, these differences were not judged to be significant for five samples by the REGWQ test; in the remaining two samples, N was more effective than HT in one case and less effective in the other case. This study shows that N-2 gas flushing, which inhibited bacterial growth in raw milk at 15 and 25 degrees C for 24 and 12 h, respectively, could constitute an alternative to LPs where no cold storage facilities exist, especially as a replacement for adulterating substances.
Subject: raw milk
N-2 gas
lactoperoxidase system
antibacterial
Ryan-Einot-Gabriel-Welsch test
PSYCHROTROPHIC BACTERIA
bacterial growth
bovine raw milk
Nitrogen gas
416 Food Science
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
fmicbiol_07_00839.pdf 915.1Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record