This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...plasma, nuclei, and mitotic figures, probably accompanied by the loss of a small amount of water from the egg, as Loeb has maintained. However since the diameter of the egg as a whole decreases very little, the loss of water must be slight. Indeed this shrinkage shows itself not so much in the decrease ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...plasma, nuclei, and mitotic figures, probably accompanied by the loss of a small amount of water from the egg, as Loeb has maintained. However since the diameter of the egg as a whole decreases very little, the loss of water must be slight. Indeed this shrinkage shows itself not so much in the decrease in size of the entire egg as in the more complete segregation of the plasma from the yolk, on the one hand, and from the more fluid inclusions (oil, water, etc.) on the other. This is accomplished, apparently, by the withdrawal of outlying portions and radiations of plasma into a central mass immediately surrounding the nucleus, while at the same time the yolk and more fluid inclusions are forced to the periphery of this mass. In this way a segregation of these three constituents of the egg is accomplished, similar in the nature of the substances segregated, but not in their orientation, to the segregation accomplished by centrifugal force. In wholly similar manner the shrinkage of the nucleus as a whole is relatively slight, whereas the segregation of chromatin from achromatin is the most distinctive action of hypertonic solutions on resting nuclei. The chromatin within the nuclear vesicle is clumped or condensed into a single central mass, or into a dense reticulum of very coarse threads; the surrounding achromatin is left free from granules of chromatin and yet it stains like oxychromatin and is identical with the material which I have elsewhere (1902) called chromatic nuclear sap. During mitosis this chromatic sap together with hyaloplasm from the cell body constitutes the archiplasm, which fills the area around the centrosomes, radiates along the astral fibers and forms the interfilar substance of the spindle as I...
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