Biomedical subjects

J Bradtke

Publications and source records attributed to J Bradtke.

3 recordsLinked to original sources

PubMed1979

Circadian and circannual fluctuations of pineal indoleamines (serotonin and melatonin) in Testudo hermanni Gmelin (Reptilia, Chelonia). I. Under natural conditions of photoperiod and temperature.

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Adaptation, Physiological↗

PubMed1979

Long-term studies on immunoreactive human melatonin.

Immunoreactive melatonin has been studied in normal human volunteers, both men and women, at different times of day and different times of the year. At 2400, but not at 0800 or 1200, there are very large inter-individual variations in mean levels, the maximum difference being fivefold. Intra-individual variations are seen at different times of the year at 2400 and 0800, with low values in spring and autumn and high values in summer and winter.

Acetyltransferases↗

PubMed1977

Determination of a dark-induced increase of pineal N-acetyl transferase activity and simultaneous radioimmunoassay of melatonin in pineal, serum and pituitary tissue of the male rat.

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Acetyltransferases↗