SHORT COMMUNICATION
Kinetic model of rumen biohydrogenation: fractional
rates of fatty acid biohydrogenation and passage
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Department of Animal Science, Michigan State University,
2265G Anthony Hall, East Lansing, MI USA 48824
Publication date: 2004-08-30
J. Anim. Feed Sci. 2004;13(Suppl. 1):87-90
KEYWORDS
ABSTRACT
A simple model of rumen fatty acid (FA) metabolism is proposed that allows calculation of first
order fractional rates of FA biohydrogenation and passage after determination of ruminal pool size
and duodenal flux. The model is used to describe the increased duodenal flow of trans-C18:1 FA
in diets supplemented with unsaturated rumen-protected FA (UNS, calcium soaps FA). Increasing
UNS increased extent of C18:2 and C18:3 biohydrogenation, and decreased extent of trans-C18:1 biohydrogenation. The model allows a mechanistic description of rumen biohydrogenation and
determination of the extent of C18:1 biohydrogenation.
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