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- W2045986784 abstract "Studies were carried out on the surface layers and the formation of the fertilization membrane in the eggs of Psammechinus miliaris, Echinocardium cordatum and Strongylocentrotus droebachiensis. The sign of birefringence and the retardation of the cortical layer were determined. No perceptible change of retardation occurred on fertilization. The birefringence of the cortex is due chiefly to ordered lipoid layers. The cortical granules have no influence on the birefringence of the cortex. They are formed at the maturation of the egg. By means of a number of different experiments and observations, it was rendered probable that the cortical granules, along with a matrix, merge with the vitelline membrane to form the fertilization membrane. A granular membrane gives a low retardation. Only on incorporation of the cortical granules and their matrix did the retardation of the membrane attain its normal value (about 12.5 mμ). An attempt was made to combine numerous data to a consistent picture of the mechanism of the membrane formation, cf. above under “Discussion.”" @default.
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- W2045986784 date "1946-10-01" @default.
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- W2045986784 title "Studies on the surface layers and the formation of the fertilization membrane in sea urchin eggs" @default.
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- W2045986784 doi "https://doi.org/10.1016/0095-8522(46)90033-5" @default.
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