Document Detail

Moisture content and particle size of dehydrated egg yolk affect lipid and cholesterol extraction using supercritical carbon dioxide.
MedLine Citation:
PMID:  9835349     Owner:  NLM     Status:  MEDLINE    
Egg yolk was spray-dried under conditions to produce a small particle size powder and a large particle size powder. Particle size was determined using a Nikon Optiophot microscope. Spray-dried egg yolk was also adjusted to various moisture levels as follows: control (2 to 4% moisture), 7% moisture, and 12% moisture. Supercritical carbon dioxide extraction (SCE) of each of these moisture treatments at 45 C/306 atm using 30 g CO2/g of sample was completed. For the particle size study, 45 g CO2/g of sample at 45 C/306 atm was utilized. Particle size exhibited a significant effect on cholesterol and lipids extracted using SCE. As moisture content of dried egg yolk increased to 7%, there was a significant increase in lipids extracted using supercritical carbon dioxide. Moisture content had no significant effect on cholesterol extraction. After extracting SCE higher moisture spray-dried egg yolk, sponge cake volume was significantly reduced compared to that of the control. The reduced sponge cake volume may be due to protein denaturation.
G W Froning; R L Wehling; S Cuppett; L Niemann
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Poultry science     Volume:  77     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  1998 Nov 
Date Detail:
Created Date:  1999-01-22     Completed Date:  1999-01-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1718-22     Citation Subset:  IM    
Department of Food Science and Technology, University of Nebraska-Lincoln, 68583-0919, USA.
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MeSH Terms
Carbon Dioxide*
Cholesterol / isolation & purification*
Egg Yolk / chemistry*
Lipids / isolation & purification*
Particle Size*
Phosphatidylcholines / analysis
Proteins / analysis
Water / analysis
Reg. No./Substance:
0/Lipids; 0/Phosphatidylcholines; 0/Proteins; 124-38-9/Carbon Dioxide; 57-88-5/Cholesterol; 7732-18-5/Water

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