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A cold-sensitive mutant of CHO cells has features of “reverse transformation” at the non-permissive temperature of 33 °C. Cells accumulate at G1with altered morphology and remain viable and quiescent for more than 40 d. Such cultures are synchronised by a temperature shift back to the permissive 39 °C.

Magnets play a large part in the study of elementary sub-nuclear particles. Advances in the technology of superconducting magnets suggest that these magnets will be an important factor in the design of future accelerators, and their associated experimental equipment.

A model for antigenic variation is proposed on the basis of changes in the expression of blood group determinants during the cell cycle.