Words similar to photoperiod
Example sentences for: photoperiod
How can you use “photoperiod” in a sentence? Here are some example sentences to help you improve your vocabulary:
Truly free-running rhythms generated by an endogenous timer should cause individuals to lose synchrony with each other over time [ 2 ] . Thus, if changes in testis volume in the later weeks of Experiment 2 were due to an endogenous timer, then we would predict less synchrony among rats undergoing a second period of testicular inhibition in Experiment 2 relative to the adult rats in Experiment 1 subjected to a sudden, synchronous change to SD photoperiod.
Rats put into an intermediate photoperiod treatment from the time of weaning exhibited an initial period of photoresponsiveness during the first third of the experiment (measurements in weeks 2-14).
If they have such an endogenous rhythm, we predicted that F344 rats treated from weaning with a constant short photoperiod or an intermediate photoperiod (L12:D12; INT) would exhibit an initial decrease in testis size, body weight, or food intake, followed by a refractory period with no differences relative to a control group in long photoperiod, and then a second period of sensitivity to shorter photoperiods, again relative to a control group in long photoperiod.
In each group, 14 rats were held in a single large photoperiod chamber, and the remaining 2 or 3 individuals in each treatment were held in a second, smaller chamber set to the same photoperiod.
Rats in SD photoperiod treatment from the time of weaning exhibited an initial period of lower food intake relative to LD controls during the first third of the experiment (P < 0.0001, F = 23.
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