[PDF] Top 20 The Cortical Changes on Fertilization of the Sea Urchin Egg

... Thus Moser 1939a has shown that following fertilization at the centrifugal pole, membrane elevation begins when the cortical reaction has reached half completion, although in uncentrifug[r] ... See full document

... Changes in birefringence and light scattering of the sea-urchin egg membranes at fertilization, mitosis and cleavage are described and illustrated.. There is a close similarity between t[r] ... See full document

... Int I De, lliul J~ 117 125(1490) 117 Calcium in sea urchin egg during fertilization ISABEllE GillOT'' PATRICK PAYAN', JEAN PIERRE GIRARD' and CHRISTIAN SARDET' 'Unite de Biologie Cellulaire Marine, UR[.] ... See full document

... McCulloh and Chambers (1992), relied completely on electrical measurements. They applied a patch pipette to the surface of an egg forming a loose seal while also impaling the egg using a conventional ... See full document

... Hist.ochemical studies of alkaline phosphatase in developing sea urchin eggs indicated that the enzyme was distributed uniformly throughout the unfertilized and ~ertilized eggs, and clea[r] ... See full document

... The facts are not entirely incompatible with the view that this cortical response constitutes the barrier to polyspermy, if we accept the hypothesis that only a fraction of the collision[r] ... See full document

... CONCLUSION The incidence of polyspermy when nicotine-treated eggs are inseminated at different sperm densities shows that this treatment increases the chance of an effective spermegg col[r] ... See full document

... In each case a series of theoretical curves is given, each corresponding to a different concentration of the diffusing substance reaching particular points on the cortex and causing the [r] ... See full document

... at fertilization as these oocytes leave meiotic ...and sea urchin (Chiri et ...oocytes, sea urchin eggs rest in interphase of the first mitotic cell cycle as they await ...documented ... See full document

... the fertilization of free spawning marine invertebrates. In sea urchins, molecular recognition between sperm and egg ensures species ...surrounding sea urchin eggs is not a simple ... See full document

... The probability of a successful sperm-egg collision was studied by immersing unfertilized eggs in sperm suspensions of known density for known but varying periods of time, ranging from o[r] ... See full document

... Theoretically, there must therefore be a change in the form of the curve relating the proportion of polyspermic eggs to the time of contact with the spermatozoa, because at t = T, the co[r] ... See full document

... When, as in these experiments, eggs are allowed to interact with spermatozoa for known times, and then functionally separated by immersion in hypotonic sea water, some eggs, presumably t[r] ... See full document

... after fertilization, the entire population being dead at 22h ...E, egg a) to early blastula stages ...E egg b) or not ...E, egg a) or began to fragment ...30h egg b). Few attempted ... See full document

... in sea urchin fertilization, bindin divergence is correlated with gamete incompatibility; species with bindins that are highly similar are gametically compatible, whereas those with bindins that have ... See full document

... purple sea urchin, Paracentrotus ...of sea urchins (Roller and Stickle, 1993; Metaxas, 1998; Forcucci and Lawrence, ...that fertilization envelope of eggs seldom rise and even successfully ... See full document

... If sperm entry is at the same rate regardless of whether or not the egg has already been fertilized or re-fertilized, the resulting distribution of male pronuclei should follow a Poisson[r] ... See full document

... temporal changes in oxygen concentrations in gelatinous egg masses containing live, respiring ...artificial egg masses of known metabolic density using embryos of the Antarctic sea ... See full document

... For the determination of cortical movement carbon particles were previously attached to the surface of the egg and the movement of the particles on the circumference of the largest optic[r] ... See full document

... with changes in the centre of the oscillation (static bias), whose difference increased with the distance from the ...the changes in bending pattern between normal and reversed beating of sea ... See full document