Related Experiment Video
Updated: Aug 8, 2026

Assaying Locomotor Activity to Study Circadian Rhythms and Sleep Parameters in Drosophila
Published on: September 28, 2010
A circadian rhythm in oxygen uptake by samanea pulvini
1Department of Biology, Yale University, New Haven, Connecticut 06520.
Abstract:
The rate of O(2) uptake by excised Samanea pulvini oscillates with a circadian rhythm during 52 hours of darkness. Rates of respiration increase during pulvinar opening and decrease prior to and during closure, consistent with the concept that opening requires a greater expenditure of energy. Externally supplied sucrose, necessary for perpetuation of the leaflet movement rhythm, has a small promotive effect on the rate of respiration.
Related Concept Videos
Circadian Rhythms and Gene Regulation
Special considerations while measuring oxygen saturation
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is important.
Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
Oxygen Requirements and Growth Patterns
Factors Affecting Respiration
Alterations in Respiration II
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...