Document Detail


Changes of headspace volatiles in milk with riboflavin photosensitization.
MedLine Citation:
PMID:  19895461     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Effects of fluorescent light, riboflavin, ascorbic acid, sodium azide, and butylated hydroxyanisole (BHA) on the volatiles in milk at 4 degrees C were determined using a combination of headspace-solid phase microextraction (HS-SPME), gas chromatography (GC), and mass spectrometry (MS). Pentanal, hexanal, heptanal, and dimethyl disulfide were formed only in the milk stored under light and increased significantly as the duration of light exposure increased from 0 to 8 h and the concentration of added riboflavin increased from 5 to 50 ppm (P < 0.05). As fat content in milk increased, peak areas of pentanal, hexanal, and heptanal increased significantly (P < 0.05) while those of dimethyl disulfide did not change significantly (P > 0.05). Sodium azide prevented the formation of dimethyl disulfide in milk, implying that dimethyl disulfide can be formed through singlet oxygen oxidation (type II pathway). Addition of ascorbic acid and BHA reduced the formation of hexanal, heptanal, and dimethyl disulfide significantly (P < 0.05). Generation mechanisms of pentanal seem to be different from those of hexanal and heptanal in milk. Both singlet oxygen oxidation (type II pathway) and free radicals (type I pathway) play important roles in the formation of light-induced volatiles in milk.
Authors:
J H Lee; D B Min
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of food science     Volume:  74     ISSN:  1750-3841     ISO Abbreviation:  J. Food Sci.     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-11-09     Completed Date:  2010-01-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0014052     Medline TA:  J Food Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  C563-8     Citation Subset:  IM    
Affiliation:
Dept. of Food Science and Technology, Seoul Natl. Univ. of Technology, Seoul 139-743, Republic of Korea.
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MeSH Terms
Descriptor/Qualifier:
Aldehydes / analysis
Animals
Cold Temperature
Dimethyl Sulfoxide / analysis
Dose-Response Relationship, Radiation
Fats / chemistry
Food Handling / methods
Free Radical Scavengers / chemistry
Gas Chromatography-Mass Spectrometry
Light*
Milk / chemistry*
Photosensitizing Agents / chemistry*
Riboflavin / chemistry*
Singlet Oxygen / antagonists & inhibitors
Solid Phase Microextraction
Volatile Organic Compounds / analysis,  chemistry,  radiation effects*
Chemical
Reg. No./Substance:
0/Aldehydes; 0/Fats; 0/Free Radical Scavengers; 0/Photosensitizing Agents; 0/Volatile Organic Compounds; 110-62-3/pentanal; 111-71-7/heptanal; 17778-80-2/Singlet Oxygen; 66-25-1/n-hexanal; 67-68-5/Dimethyl Sulfoxide; 83-88-5/Riboflavin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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