Now showing items 31-40 of 594
Respiratory rhythms in stingless bee workers: circadian and ultradian components throughout adult development
The workers of the stingless bee, Melipona quadrifasciata, assume different tasks during their adult life. Newly emerged individuals remain inside the nest, without contact with the external environment. Maturing workers ...
Spontaneous circadian rhythms in a cold-adapted natural isolate of Aureobasidium pullulans
(Nature Publishing Group, 2017-10)
Circadian systems enable organisms to synchronize their physiology to daily and seasonal environmental changes relying on endogenous pacemakers that oscillate with a period close to 24 h even in the absence of external ...
Free-running circadian rhythms of muscle strength, reaction time, and body temperature in totally blind people
Light is the major synchronizer of circadian rhythms. In the absence of light, as for totally blind people, some variables, such as body temperature, have an endogenous period that is longer than 24 h and tend to be free ...
The Circadian Timing System: Making Sense of day/night gene expression
(Sociedad de Biología de Chile, 2004)
Circadian rhythm of anti-fungal prenylated chromene in leaves of Piper aduncum
Leaves of Piper aduncum accumulate the anti-fungal chromenes methyl 2,2-dimethyl-2H-1-chromene-6-carboxylate (1) and methyl 2,2-dimethyl-8-(3'-methyl-2'-butenyl)-2H-1-chromene-6-carboxylate (2). The enzymatic formation of ...
Comparative study on free-running locomotor activity circadian rhythms in Brazilian subterranean fishes with different degrees of specialization to the hypogean life (Teleostei: Siluriformes; Characiformes)
(TAYLOR & FRANCIS LTD, 2009)
In this paper we report findings on the presence of circadian rhythms in six species of cave-dwelling fishes from Brazil. Locomotor activity of islolated individuals was automatically recorded for 10 consecutive days under ...
Diurnal variations in insulin secretion and K+ permeability in isolated rat islets
(Blackwell Science AsiaCarltonAustralia, 1999)
Circadian remodeling of neuronal circuits involved in rhythmic behavior
(Public Library of Science, 2008-03)
Clock output pathways are central to convey timing information from the circadian clock to a diversity of physiological systems, ranging from cell-autonomous processes to behavior. While the molecular mechanisms that ...
Daily rhythms of native Brazilians in summer and winter
(Pergamon-Elsevier Science LTDOxford, 2012)
Access to electricity, granting relative independence of human activity on the dark phase of the day, has been pointed out as an important cause for the absence of seasonal changes in the daily rhythms of humans living in ...