Ruminal Infusions of Cobalt-EDTA Reduce Mammary [Delta]9-Desaturase Index and Alter Milk Fatty Acid Composition in Lactating Cows1-3 From: The Journal of Nutrition | Date: April 1, 2008| Author: Ahvenjà Arà Griinari, J Mikko; Huhtanen, Pekka; Toivonen, Vesa; Vanhatalo, Aila; ¤ ¤ ¶ , Anu; là rvi, Seppo; Shingfield, Kevin J | Copyright American Institute of Nutrition Apr 2008. Provided by ProQuest LLC.Copyright information

Abstract

Ruminal administration of a triple indigestible marker system comprised of cobalt EDTA (CoEDTA), ytterbium acetate (YbAc), and chromium-mordanted straw (CrS) decreases product:substrate ratios for Δ9-desaturase in bovine milk fat. This experiment was designed to identify the marker(s) responsible and develop an alternative system for simultaneous determination of nutrient flow in the gastro-intestinal tract and milk fatty acid composition. Five lactating dairy cows were u...

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