Letter | Published:

Labelling of Bull Semen with Phosphorus-32 in vivo


RECENT work has indicated that when rams are injected intravenously with labelled phosphate and serial samples of semen collected, the various phosphorus components of the semen appear with maximal radioactivity in a definite time sequence1. In this communication these experiments have been extended to a bull, both with the view of obtaining information about various physiological processes in its reproductive tract and also for acquiring labelled sperm for other experimental purposes.

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  1. 1

    Dawson, R. M. C., Biochem. J., 68, 512 (1958).

  2. 2

    Schmidt, G., and Thannhauser, S. J., J. Biol. Chem., 161, 83 (1945).

  3. 3

    Dawson, R. M. C., Mann, T., and White, I. G., Biochem. J., 65, 627 (1957).

  4. 4

    Bishop, D. W., and Weinstock, I., Anat. Rec., 101, 731 (1948).

  5. 5

    Bronsch, K., and Leidl, W., Zbl. Veterinärmed, 4, 175 (1957).

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