ELECTRIC IMPEDANCE OF FERTILIZED ARBACIA EGG SUSPENSIONS
نویسندگان
چکیده
منابع مشابه
Electric Impedance of Fertilized Arbacia Egg Suspensions
From the low frequency alternating current impedance and the volume concentrations of suspensions of Arbacia eggs, it is shown that the high resistance membrane is either at or very near the plasma membrane for both unfertilized and fertilized eggs, and that the specific resistances of the perivitelline space and fertilization membrane are not greatly different from that of sea water. The effec...
متن کاملElectric Impedance of Fertilized Arbacia Egg
In previous work on the alternating current impedance of Arbacia punctulata egg suspensions (Cole and Cole, 1936b), it was found that the unfertilized egg had a static membrane capacity of 0.73/~f./cm. ~ which was independent of the frequency. On fertilization, the low frequency membrane capacity increased to 3.1/~f./cm. 2 and at intermediate frequencies there was evidence of another capacity e...
متن کاملElectric Impedance of Suspensions of Arbacia Eggs
Apparatus has been designed and constructed for the measurement of the electric impedance of suspensions of Arbacia eggs in sea water to alternating currents of frequencies from one thousand to fifteen million cycles per second. This apparatus is simple, rugged, compact, accurate, and rapid. The data lead to the conclusions that the specific resistance of the interior of the egg is about 90 ohm...
متن کاملElectric Impedance of Arbacia Eggs
The alternating current resistance and capacity of suspensions of unfertilized and fertilized eggs of Arbacia punctulata have been measured at frequencies from 10(3) to 1.64 x 10(7) cycles per second. The unfertilized egg has a static plasma membrane capacity of 0.73 microf./cm.(2) which is practically independent of frequency. The fertilized egg has a static membrane capacity of 3.1 microf./cm...
متن کاملElectric Impedance of the Frog Egg
Electrical impedance measurements were made upon unfertilized and fertilized eggs of the leopard frog, Rana pipiens, over a frequency range of 0.05 to 10 kc. Average values of 170 ohm cm.(2) were obtained for the plasma membrane resistance of the egg, 2.0 microf/cm.(2) for the plasma membrane capacity, 86 degrees for the phase angle of the membrane, and 570 ohm cm. for the specific resistance o...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1938
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.21.5.583