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Title: Effects of light and copper ions on volatile aldehydes of milk and milk fractions

Raw, laboratory-pasteurized and plant-pasteurized homogenized milks were exposed to copper ions (5 ppm), to sunlight or fluorescent light and the effects determined on the composition of volatile aldehydes. The greatest change due to copper treatment was an increase in n-hexanal; acetaldehyde showed the least response in each of the sources of milk. The responses were similar from all three sources of milk with laboratory-pasteurized milk samples showing the greatest responses for each aldehyde analyzed. Similar milk samples exposed to sunlight also showed an increase in volatile aldehydes from all milk sources but with the greatest response being acetaldehyde and n-pentanal components. The milk fraction most susceptible to changes in the presence of light was neutralized whey, whereas resuspended cream was most susceptible to copper exposure. Overall, dialyzed whey appeared to be influenced more than other milk fractions by both light and copper ions.
Authors:
; ;
Publication Date:
OSTI Identifier:
5257400
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Dairy Science; (USA); Journal Volume: 71:9
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; COPPER COMPOUNDS; BIOLOGICAL EFFECTS; MILK; CHEMICAL COMPOSITION; VISIBLE RADIATION; ALDEHYDES; BIOLOGICAL MATERIALS; BODY FLUIDS; ELECTROMAGNETIC RADIATION; FOOD; MATERIALS; ORGANIC COMPOUNDS; RADIATIONS; TRANSITION ELEMENT COMPOUNDS 560300* -- Chemicals Metabolism & Toxicology