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Circadian Rhythms

Known as: Nyctohemeral Rhythm, Rhythm, Nycthemeral, Rhythms, Nyctohemeral 
The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs or environmental and… 
National Institutes of Health

Related topics

Related topics

11 relations
Biological ClocksChronotherapyCircadian ClocksSleep

Broader (1)

Biorhythm

Narrower (1)

Diurnal Rhythm

Papers overview

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Highly Cited
1996
Highly Cited
1996
Sap flow measurements of lateral tree roots in agroforestry systems.
Successful extension of agroforestry to areas of the semi-arid tropics where deep reserves of water exist requires that the tree… 
Highly Cited
1986
Highly Cited
1986
Characteristics of circadian rhythms in human functions.
: Circadian rhythms are of endogenous origin, in humans as in all organisms. Under temporal isolation, i.e., after exclusion of… 
Highly Cited
1983
Highly Cited
1983
Postnatal development of circadian rhythm in serum cortisol levels in children.
High-pressure liquid chromatography was used to study the development of blood adrenocortical circadian rhythm in a total of 64… 
Highly Cited
1982
Highly Cited
1982
Effects of melatonin implants on the circadian rhythm of plasma melatonin and prolactin in sheep.
The effects of implanting Silastic capsules containing melatonin on plasma melatonin and prolactin levels were investigated in… 
Highly Cited
1981
Highly Cited
1981
Circadian rhythms in teleost retinomotor movement. A comparison of the effects of circadian rhythm and light condition on cone length.
The long, slender cones of the teleost retina elongate at night and contract during the day. In the Midas cichlid, Cichlasoma… 
Highly Cited
1978
Highly Cited
1978
An automated multi-calorimeter system: preliminary experiments on laying hens.
1. An open-circuit, automated, multi-calorimeter system for studies on the energy metabolism of the fowl is described. 2… 
Highly Cited
1975
Highly Cited
1975
Regulation of intestinal calcium-binding protein calcium intake in the rat.
Analytical gel electrophoresis of the vitamin D-dependent intestinal calcium-binding protein (CaBP) has demonstrated two protein… 
Highly Cited
1972
Highly Cited
1972
No Desynchronization among Four Circadian Rhythms in the Unicellular Alga, Gonyaulax polyedra
The phase relationships among several circadian rhythms in the unicellular alga Gonyaulax polyedra remained unchanged during… 
Highly Cited
1972
Highly Cited
1972
Diurnal variation of HMG CoA reductase activity in rat intestine.
HMG CoA reductase activity of rat intestinal mucosa has a diurnal rhythm which coincides with the diurnal variation of the… 
Highly Cited
1967
Highly Cited
1967
DIURNAL AND LONG-TERM VARIATIONS OF THE KINETIC ENERGY GENERATION AND DISSIPATION FOR A FIVE-YEAR PERIOD
Abstract The diurnal variation and long-term variation of the kinetic energy generation and dissipation are investigated with the… 
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