Gaggi R, Bartolomei N, David M, Ghelfi C, Ceresi E
Arch Sci Biol (Bologna). 1978 Jan-Dec;62(1-4):1-11.
Daily variations of serum and urine calcium and phosphate were determined in young and adult rats of both sexes. The animals were maintained in natural conditions of illumination and feeding ad libitum. The twenty-four hour rhythm of the serum levels and urinary excretion of these electrolytes in male rats is confirmed. This rhythm is markedly modified in young females and less in adult females. Evidence for a circadian rhythm of the Ca/PO4 ratio appears in all groups of rats. The rhythms of serum and urine Ca/PO4 rations are similar in all experimental groups.
测定了不同性别的幼年和成年大鼠血清及尿液中钙和磷的每日变化。动物饲养于自然光照条件下，随意进食。证实了雄性大鼠血清水平和这些电解质尿排泄的24小时节律。这种节律在幼年雌性大鼠中明显改变，在成年雌性大鼠中改变较小。所有大鼠组均出现钙/磷比值昼夜节律的证据。所有实验组血清和尿液钙/磷比值的节律相似。
