“…In addition to changes in membrane permeability to calcium (Batkin et al, 1978), a decrease in Received 21 June 1989. the enzyme adenosine triphosphate has been noted (Batkin et al, 1978) and an increase in levels of ornithine carboxylase (Byus et al, 1987). There were minor changes in the levels of various steroids (Free et al, 1981;Cahill & Elder, 1983), reduced blastogenesis of human lymphocytes (Czerski, 1975) and decreased growth in broad bean roots (Inoue et al, 1985). There are also possible changes of neoplastic cells in soft agar, as observed by Phillips et al (1986), but these were not reproduced by Cohen (1987).…”