Studies on Yolk Formation in Hen's Eggs : I. Light and Scanning Electron Microscopy of the Structure of Yolk Spheres

卵黄を構成する卵黄球(yolk spheres)の構造を,光学顕微鏡と走査電子顕鏡下で観察した.とくに卵黄球内の粒子と卵黄球表面の膜様構造物について論議した.貯蔵卵の卵黄球の形態的変化についても一部触れた.

The structure of yolk spheres of hen yolk was observed in state of suspension of raw and fixed materials under the light and the scanning electron microscope. The yolk spheres were composed of yellow and white yolk spheres. Their structural features were discussed on the basis of figures obtained by both types of microscopy. The surface of yolk spheres seemed to be enclosed in a wall made of certain homogeneous structures. In stored eggs, the appearance of yolk spheres changed distinctly. These morphological changes were considered to have been induced by osmotic changes of the yolk.