Authors: Stephanie Lorenz Andrea Buettner Klaus Ender Gerd Nürnberg HansJürgen Papstein Peter Schieberle Karin Nürnberg
Publish Date: 2014/02/07
Volume: 214, Issue: 2, Pages: 112-118
Abstract
German Simmental bulls were kept either in a stable group 1 or on a pasture group 2 For both groups the intramuscular fat content of the longissimus muscle and the fatty acid composition in phospholipids and triacylglycerols were investigated Significant influences of feeding were shown in most fatty acids measured in both lipid classes In concentratefed bulls a higher content of linoleic acid C182n6 was detected corresponding to the large amount of linoleic acid found in concentrate used as feed In contrast bulls fed grass proved to have a higher linolenic acid C183n3 content also correlating well with the larger amount of linolenic acid found in grass Pressurecooking of the beef followed by an analysis of eight important meat odorants revealed that in line with the higher concentrations of the precursor fatty acids C183n3 and C181 in muscle of group 2 EZ26nonadienal from C183n3 as well as nonanal and octanal from C181 were much higher in the processed meat of animals fed grass On the other hand the much higher amounts of C182n6 in bulls fed concentrate were wellreflected by higher concentrations of five aroma compounds known to be formed by a thermal degradation of this acid eg EE24decadienal
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