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- W4229693498 abstract "The content of red pigment-concentrating hormone (RPCH) was determined in the crayfish eyestalk at different times of day and various conditions of illumination. Two types of preparations were used: (a) eyestalks removed from otherwise intact animals; and (b) isolated eyestalks kept in organ culture. The RPCH content was determined under (a) 12:12 hr light:dark cycles, (b) continuous darkness, and (c) continuous illumination under 500 Ix. In all three conditions, RPCH content varied in a 24-hr rhythm. Under LL and DD, the period deviated from 24 hr both in intact animals and in isolated eyestalks. The rhythm amplitude ranged from 2 to 3 log units of RPCH content, depending on the experimental conditions, being highest in the intact animals under LD (1200 pg at night to 2 pg in daytime), and the lowest in the isolated eyestalks under DD (400 pg at night to 6 pg in daytime). These results suggest that the isolated eyestalk is capable of generating a self-sustaining circadian rhythm of RPCH secretion, with similar properties to those in the intact animal." @default.
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- W4229693498 date "1994-09-01" @default.
- W4229693498 modified "2023-10-16" @default.
- W4229693498 title "Circadian rhythm of content of red pigment-concentrating hormone in the crayfish eyestalk" @default.
- W4229693498 doi "https://doi.org/10.1016/1367-8280(94)00035-2" @default.
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