Abstract
WORK on the evocation of neural tissue in vertebrate embryos by chemically prepared substances has hitherto been confined to the Amphibia1. But since in the induction of neural tissue in general the chick has shown considerable similarities to the newt, especially in the inducing activity of its organizer when coagulated2, and in the inducing activity of fully differentiated tissues3, there was reason to believe that it would respond in a similar way to chemicals. This was not tested, however, owing to a technical difficulty: any implant of dead material becomes surrounded by mesenchyme, and consequently isolated from the reactive ectoderm2.
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References
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ABERCROMBIE, M. Evocation in the Chick. Nature 144, 1091–1092 (1939). https://doi.org/10.1038/1441091b0
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DOI: https://doi.org/10.1038/1441091b0
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