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J. P. Kavanagh and W. G. Bardsley

Summary. Examination of human seminal plasma showed that there was no p-nitrophenylphosphatase activity maximum at alkaline pH values. A constant ratio of enzyme activities in 8 split ejaculates, identical temperature dependence and co-purification through a three-step purification procedure led us to conclude that the alkaline phosphatase in human semen is identical to acid phosphatase.

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J. S. Shindler, Kathleen Haworth, Audrey Axon, W. G. Bardsley, V. R. Tindall, and I. Laing

Summary. Fourteen healthy women were screened for the following parameters throughout one complete menstrual cycle: levels of urinary oestrogens and pregnanediol; levels of plasma and urinary gonadotrophins; and pH, protein content and levels of peroxidase in the cervical mucus. It was found that concentrations of peroxidase in the cervical mucus were not a reliable index of ovulation.