The mechanism of cell division

The recently developed approximation method for treating problems of cell biophysics is generalized and corrected in some points. The equations of elongation of a dividing cell of any shape are given for the most general case of finite permeability as well as of finite internal and external diffusion coefficients.     

The effects of nicotine on cell division of HeLa cells.

A time lapse cinemicrographic study shows that, at low concentrations, nicotine can speed up cytokinesis and, at high concentrations, prolong the duration of metaphase in HeLa cells. Based upon the known effects of the alkaloid in other systems, it appears that it may stimulate microfilament activity and inhibit microtubule function by increasing the level of cytosolic calcium ions.