Some Observations Concerning the End-Plate Potential

Some Observations Concerning the Recent Typhoid Epidemic in Calcutta

Active phase of frog's end-plate potential.

IT HAS BEEN CONSIDERED that the end-plate potential (e.p.p.) is generated by the brief ionic flux across the end-plate membrane and the later slowly declining phase of the e.p.p. is due to the dissipation of the charge along and across the muscle membrane. This consideration was supported by some authors. Kuffler (21) observed with a single nerve-muscle preparation that the later slowly decayin...

Some Observations concerning Metakinesis in Sea Urchin Eggs

One of the more perplexing aspects of mitosis has been the na ture of the mechan ism whereby the chromosomes are moved into their metaphase configuration. Early theories of chromosome movemen t which involved the spindle or chromosomal fibers later gave way to theories proposing alternate mechanisms, as spindle fibers came to be regarded as artifacts of fixation. In recent years, however, evide...

Some Observations Concerning Electronic Densities, Electrostatic Potentials and Chemical Potentials

The hypothesis that the electronic density distribution in a molecule is qualitatively similar to the nuclear potential is shown . to be in error in at least two cases-oxirane and cubane-although it does hold true in a' number of other systems. Its emphasis upon the dominant role played by electrostatic internctions with the nuclei is consistent with some approximate molecular energy formulas. ...

Human motor end plate: some ultrastructural aspects of its development.

Regarding the motor end plates, the earliest evidence of the formation of such structures was observed in the muscle of foetuses of nine and ten weeks development. At this stage the developing motor end plate consits of several small axons covered on their outer aspect by Schwann cell cytoplasm, while on the inner aspect they are separated by a layer of basement membrane of the myotube with whi...