Key points are not available for this paper at this time.
Raymond E. Zirkle, Ultraviolet-Microbeam Irradiation of Newt-Cell Cytoplasm: Spindle Destruction, False Anaphase, and Delay of True Anaphase, Radiation Research, Vol. 41, No. 3 (Mar., 1970), pp. 516-537
Raymond E. Zirkle (Sun,) studied this question.