Ebadi M S, Weiss B, Costa E
Science. 1970 Oct 9;170(3954):188-90. doi: 10.1126/science.170.3954.188.
Rats were maintained in alternating periods of 12 hours of light and 12 hours of darkness. The concentration of adenosine 3',5'-monophosphate in pineal gland was six times higher at the end of the light period than at the end of the period of darkness. This effect of light was abolished in blinded animals.
大鼠饲养于12小时光照与12小时黑暗交替的环境中。松果体中3',5'-环磷酸腺苷的浓度在光照期结束时比在黑暗期结束时高6倍。光照的这种作用在致盲动物中消失。