Influence of manufacturing conditions on the conjugated linoleic acid content and the isomer composition in ripened French Emmental cheese.
In a study of the evolution of conjugated linoleic acid (CLA) during cheese production, the influence of Emmental cheese processing on the CLA content and the CLA isomer composition was evaluated. The use of raw and thermised milk, changes of processing temperature and the effect of propionic acid bacteria (PAB) were investigated. The content of CLA in raw milk was 8.6 +/- 1.9 mg/g fat and in the ripened cheese at 70 d was 8.6 +/- 1.6 mg/g fat, under normal processing conditions. No changes in the CLA content and CLA isomer composition were observed during Emmental cheese manufacturing process. Changes in cooking and moulding temperatures did not influence the CLA content. CLA content of cheese made from microfiltered milk with two different Propionibacterium freudenreichii strains was very close to cheeses made without PAB. CLA levels seem to be stable in this type of dairy product under the conditions examined.
Gnädig
Silke
S
INRA, Unité de Nutrition Lipidique, 21068 Dijon cedex, France.
Chamba
Jean-François
JF
Perreard
Eric
E
Chappaz
Stéphane
S
Chardigny
Jean-Michel
JM
Rickert
Reinart
R
Steinhart
Hans
H
Sébédio
Jean-Louis
JL
D000818:Animals; D002611:Cheese / Q000032:analysis* / Q000382:microbiology; D005285:Fermentation; D005511:Food Handling / Q000379:methods*; D006358:Hot Temperature; D007536:Isomerism; D044243:Linoleic Acids, Conjugated / Q000032:analysis* / Q000737:chemistry*; D008892:Milk / Q000737:chemistry; D011424:Propionibacterium / Q000378:metabolism; D013696:Temperature
D044243:Linoleic Acids, Conjugated