Intravascular Life Span of the Duck Red Blood Cell as Determined by Radioactive Selenium

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Abstract
Use has been made of the ability of selenium to be fixed in red blood cells to estimate the intravascular life span of the duck erythrocyte. Donor ducks were injd. with Na selenate containing radioselenium. These ducks were then bled and the red blood cells injd. into 10 young ducks. Two each of the recipient ducks were bled at various time intervals up to 10 days. It was noted that there was a disappearance of selenium-tagged red blood cells from the circulation of the ducks. The value of 11.7 days was found to be the intravascular life span of the duck erythrocytes under the exptl. conditions descr. here. In correlating the relationship between the disappearance of fixed erythrocyte selenium and the destruction of the red cell certain assumptions were made which are discussed.
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