The diameter of the MEF1 poliomyelitis virus is determined to be 21 mμ when frozen-dried or packed in a crystalline array, which is considered the more reliable measurement compared to air-drying.
SummaryThe particles of the MEF1 poliomyelitis virus, grown in monkey-kidney tissue culture, and subsequently purified by chemical and physical means, are spherical in shape and highly uniform in diameter. The diameter of individual particles, prepared by normal air-drying from a 0.1 M ammonium acetate suspension, is found to be 31 mμ. The diameter of particles packed in a crystalline array, or frozen-dried from a 0.1 M ammonium bicarbonate suspension, is found to be 21 mμ. It is believed that the latter diameter is the more significant and reliable figure.
Schwerdt et al. (Tue,) studied this question.