A daily rhythm in the oscillations of pineal dopamine, norepinephrine and epinephrine content was found in male Wistar:Han rats. The acrophases of the oscillations were localized in the first half of the dark period and generally higher values were found in the dark part of the day., I. Ahlers, B. Pástorová, P. Solár, E. Ahlersová., and Obsahuje bibliografii