The anti-HbF flow cytometric method for detection of fetal cells offers a simple, reliable, and more precise alternative to the Kleihauer-Betke manual technique for the assessment of fetomaternal hemorrhage. The method has additional potential applications for the study of HbF levels or frequency of adult red cells with low levels of HbF (F cells) in individuals with hemoglobinopathies.
During the sunltner of 1921 the writer of this article was studying the Plankton of Lake Nipigon, Ont., and collecting insects during his spare time. While searching for insects in the bush many opportunities were presented for observing the habits of wild life under natural conditions. Not the least interesting of these observations were those concerning the Black Bear (Ursus nwzmicanus) .
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