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  • 1 Department of Physiology and Biochemistry, Faculty of Veterinary Science, Szent István University H-1078 Budapest, István u. 2, Hungary
  • 2 Research Institute of Animal Breeding and Nutrition Herceghalom, Hungary
  • 3 Department of Pharmacology and Toxicology, Faculty of Veterinary Science, Szent István University H-1400 Budapest, P.O. Box 2, Hungary
  • 4 Department of Physiology and Biochemistry, Faculty of Veterinary Science, Szent István University H-1400 Budapest, P.O. Box 2, Hungary
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The absorption of ethanol from the rumen was studied in three British Milk sheep equipped with a rumen cannula. After removal of the rumen content and washing the forestomachs several times the reticulo-omasal orifice was closed and through the cannula 20 or 60 ml ethanol and 2 ml Cr-EDTA were infused in physiological saline. The entire fluid volume was 3000 ml. At the start of the experiment (0 min) and subsequently in the 5th, 15th, 30th, 45th, 60th and 75th minutes samples were taken from the fluid present in the forestomachs. During the 75-min experiment the amount of ethanol gradually decreased in the rumen. The rate of disappearance varied according to concentration. The graph depicting the change of ruminal ethanol concentration shows a curve typical of passive transport. The equation describing the disappearance of ethanol was y = -0.0474x2 + 5.6544x + 10.869 after the administration of 20 ml ethanol, and y = -0.1377x2 + 19.541x - 24.606 after the infusion of 60 ml ethanol. It was established that ethanol was absorbed through the rumen wall by a passive transport process.

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