Inhibition of psychrotrophic bacterial growth in refrigerated milk by addition of carbon dioxide

Journal Article · Fri Jan 01 00:00:00 EST 1988 · J. Dairy Sci.; (United States)

DOI:https://doi.org/10.3168/jds.S0022-0302(88)79524-7· OSTI ID:5238484

Roberts, R F; Torrey, G S

Treatment of refrigerated milk with 20 to 30 mM CO/sub 2/ was evaluated as a method for extending storage-life by inhibiting growth of psychrotrophic bacteria. Generation times for each of five psychrotrophic pseudomonads were significantly longer when grown at 7/sup 0/C in sterile milk treated with CO/sub 2/ than when the same bacteria were grown in ungassed sterile milk. When raw milks were stored at 7/sup 0/C and treated with CO/sub 2/, the time required for aerobic plate counts to increase 10-fold was at least 24 h longer than in the same milks left untreated. Numbers of coliforms, psychrotrophs, and anaerobes (facultative and obligate) were significantly lower in raw milks treated with CO/sub 2/ than in untreated milks incubated at 7/sup 0/C for 6 d.

• Research Organization: South Dakota State Univ., Brookings
• OSTI ID: 5238484
• Journal Information: J. Dairy Sci.; (United States), Vol. 71:1
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
60 APPLIED LIFE SCIENCES
BACTERIA
GROWTH
CARBON DIOXIDE
TOXICITY
MILK
STORAGE LIFE
DAIRY INDUSTRY
AGRICULTURE
BIOLOGICAL MATERIALS
BODY FLUIDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
FOOD
FOOD INDUSTRY
INDUSTRY
MATERIALS
MICROORGANISMS
OXIDES
OXYGEN COMPOUNDS
560300* - Chemicals Metabolism & Toxicology
553000 - Agriculture & Food Technology