Abstract
There is nothing so commonplace as a day, or so extraordinary, for the period of time that we customarily divide into 24 hours depends upon the amount of time required for our particular planet to spin one full turn upon its axis. Move to the moon, Mars, or Jupiter, and the day takes on quite different dimensions (if by a “day” we mean one complete cycle of light and darkness). If the earth rotated slower, the day would be longer; if it did not rotate at all, we would either be bathed in perpetual sunlight, or immersed in constant darkness. Needless to say, if absolute time exists, it has nothing to do with day length!
Now that we know the viscera can be taught, the thought comes that we’ve been neglecting them all these years.
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References
Boulos, Z., and M. Terman. “Food availability and biological rhythms.” Neurosci. Biobehav. Rev. 4 (1980): 119–131.
Fernstrom, J., R.J. Wurtman, B. Hammarstrom-Wiklund, W.M. Rand, H.N. Munro, and C.S. Davidson. “Diurnal variations in plasma concentrations of tryptophan, tyrosine, and other neutral amino acids; effect of dietary protein intake.” Am. T. Clin. Nutr. 32 (1979): 1912–1922.
Glass, L., and M.C. Mackey. The Rhythms of Life. From Clocks to Chaos. Princeton, N.J.: Princeton University Press, 1988.
Klerman, E.B., D.-J. Dijk, R.E. Kronauer, and C.A. Czeisler. “Simulations of light effects on the human circadian pacemaker: implications for assessment of intrinsic period.” Am.J. Physiol. 270 (1996): R271–R282.
Kronauer, R.E., C.A. Czeisler, S.F. Pilato, M.C. Moore-Ede, and E.D. Witzman. “Mathematical model of the human circadian system with two interacting oscillators.” Am. J. Physiol. 242 (1982): R3–R17.
Van der Pol, B. “The nonlinear theory of electric oscillations.” Proc I.RE. 22 (1934) 1054–1086.
Watanabe, M., V.R. Potter, and H.C. Pitot. “Systematic osculations in tyrosine trans-aminase and other metabolic functions in liver of normal and adrenalectomized rats on controlled feeding schedules.” J. Nutr. 95 (1968): 207–222.
Wever, R.A. “A mathematical model of circadian rhythms.” In: Circadian Clocks. J. Aschoff, ed., Amsterdam: North Holland, 1965, 47–63.
Wever, R.A. “Toward a mathematical model of circadian rhythmicity.” In: Moore-Ede, M.C., and C.A. Czeisler, Eds., Mathematical Models of the Circadian Sleep-Wake Cycle. New York: Raven Press, 1984, 17–79.
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© 1998 Springer Science+Business Media New York
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Hargrove, J.L. (1998). Circadian Rhythms. In: Dynamic Modeling in the Health Sciences. Modeling Dynamic Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-1644-5_20
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DOI: https://doi.org/10.1007/978-1-4612-1644-5_20
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