Summary
It is concluded that photoperiod has little direct effect on the mitotic activity or morphological development of the pineal parenchymal cell of the rat in the early postnatal period.
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Trakulrungsi, W.K., Yeager, V.L. Effect of photoperiod on early changes in the neonatal rat pineal gland. Experientia 33, 84–85 (1977). https://doi.org/10.1007/BF01936768
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DOI: https://doi.org/10.1007/BF01936768