The effects of prolonged low level radiation on the Coronary vessels of the developing chick embryo

✍ Scribed by Davis, J. E.

• Publisher: John Wiley and Sons
• Year: 1968
• Tongue: English
• Weight: 400 KB
• Volume: 161
• Category: Article
• ISSN: 0003-276X
• DOI: 10.1002/ar.1091610209

✦ Synopsis

Microcurie amounts of pJ2, Na", Fesg, and ClJo in normally occurring compounds were injected directly into the vitelline vessels of developing chick embryos at stage 24 (Hamburger and Hamilton, '51). The surviving embryos were sacrificed at stage 41. Hearts were removed and examined intact or sectioned for later examination. Coronary vessels were identified, classified according to size (large, diameter = > 80 p ; medium, diameter = 40-80 p; small, diameter < 40 p ) and counted. There was a significant increase in the numbers of small and medium vessels which had developed in the presence of gamma radiation emitted by Na"-and Fejg-compounds. The p32-and CP-containing compounds did not affect the numbers of vessels of any size. The resulting increased vascularity is shown to be a matter of a distinct increase in numbers of blood vessels as opposed to a simple alteration of the normally occurring vessels.