The resetting of the SCN clock by light – and with it the activity phase - is thought to be the direct consequence of transcriptional activation of light-responsive genes in the SCN [2], [3], [17].
Polar plumes are observed in polar regions during the minimum activity phase.
The activity phase of the nurses in the hive was more similar to the foragers than to the nurse-age bees in the laboratory, indicating that the forager activity has a stronger influence on their phase than the LD cycles.
Salgado-Delgado, R., Angeles-Castellanos, M., Saderi, N., Buijs, R. M. & Escobar, C. Food intake during the normal activity phase prevents obesity and circadian desynchrony in a rat model of night work.
Salgado-Delgado R, Angeles-Castellanos M, Saderi N, Buijs RM, Escobar C. Food intake during the normal activity phase prevents obesity and circadian desynchrony in a rat model of night work.
...".. We show, in a simplified network consisting of an oscillator inhibiting a follower neuron, how the interaction between synaptic depression and a transient potassium current in the follower neuron determines the activity phase of this neuron.
The delayed activity phase in foragers relative to the nurse-age bees in the laboratory was also apparent in the analyses of the median, which was significantly delayed in the foragers in three of the four trials (a similar trend was also seen in the third trial with colony 13 10; Supplementary Fig. 5b).
It is shown that the average values of characteristic decay time, τ, and energy spectral index, γ, are all changing with the solar activity phase.
It has been used for prediction tests for 37 geomagnetic disturbance events during the descending solar activity phase 1984 1985, and was presented in 33rd COSPAR conference.
ka BP, strongly increased human impact documented by former pollen studies is reflected by the fluvial dynamics as well, i.e. an activity phase of strong overbank sedimentation 2.7 2.1 cal.
The Saguenay Fjord clams displayed a complex pattern of stress responses and damage such as increased heme oxygenase activity, phase 2 conjugation enzyme activity, lipid peroxidation, and altered DNA strand breaks.
