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Journal of Dairy Science Vol. 56 No. 7 935-938
© 1973 by American Dairy Science Association ®
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Error in Estimation of Contained Milk Volume in the Dairy Goat with Cerium-1411

C. E. Sagan, M. B. Snipes2 and F. W. Lengemann

Department of Physical Biology, New York State Veterinary College, Cornell University, Ithaca, New York 14850

ABSTRACT

Cerium-141 as a nonabsorbable radiomarker was used in nine separate trials with two goats to determine milk volume by isotopic dilution techniques. A correction procedure, developed for guinea pigs, showed an average underestimate of contained milk volume of 1.1% (range, .61 to 4.06%) for goats having from 353 to 1,202 ml of milk per udder half. A correction for incomplete penetration of cerium-141 into the alveolar spaces of the mammary gland is not needed in the goat.

FOOTNOTES

1 Supported in part by U.S.A.E.C. contracts AT(II-1)-3167 and AT(II-1)-3159 and a Dental Training Grant DE-00090.

2 Present address: The Lovelace Foundation for Medical Education and Research Fission Product Inhalation Laboratory, Building 9200, Area Y, Sandia Base, Albuquerque, New Mexico 87115.






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Copyright © 1973 by the American Dairy Science Association ®.