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Biological Rhythms Lab
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The lab uses mathematical modeling and experiments to uncover how rhythmic phenomena in living organisms work.

AboutAbout the lab
Uncovering how biological rhythms work, through mathematics and experiments.
Associate Professor Hiroshi Ito's lab discovers the phenomena underlying biological rhythms and elucidates their mechanisms through both mathematical and experimental research.
The lab's work includes observing the circadian rhythms of single cyanobacterial cells, studying how the timing of flowering in plants is determined, and research using squid and jellyfish.
The lab also promotes science communication by running the "Geikou Art & Science Café."
Key terms
- circadian rhythm
- A rhythm with a period of about one day, generated inside the bodies of living organisms
- cyanobacteria
- As the name suggests, a type of bacteria. This lab observes the circadian rhythm of individual cells
- cellular clock
- The clock mechanism that keeps a rhythm inside a cell
ResearchResearch themes
The lab looks for the phenomena that underlie the rhythms seen in living organisms and elucidates their mechanisms using both mathematical and experimental approaches. Examples include the precision of the cellular clock in cyanobacteria, the timing of flowering in plants, and what squid and jellyfish rhythms have in common.
Origins of the cellular clock's precision
The lab observes the circadian rhythms of single cyanobacterial cells to investigate why the cellular clock can keep time so accurately.
*Illustrative imageHow the timing of plant flowering is determined
Through mathematical and experimental research, the lab investigates the mechanisms that determine when plants flower.
*Illustrative imageCommonalities in the mechanisms that generate rhythms
Using squid and jellyfish, the lab investigates whether the mechanisms that generate biological rhythms are shared among living organisms.
MembersFaculty
- Associate ProfessorHiroshi Ito
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Synechococcus X” Nobody16w / CC BY-SA 4.0 (cropped)
- How the timing of plant flowering is determined: “Beach Morning Glory Half Open Flower Uthandi Chennai Oct21 R16 05005” This Photo was taken by Timothy A. Gonsalves. Feel free to use my photos, but please mention me as the author. I would much appreciate if you send me an or write on my talk page, for my information. Please contact me before commercial use. Please do not upload an edited image here without consulting me. I would like to make corrections only at my own source to ensure that the changes improve the image and are preserved.Otherwise you may upload an edited image with a new name. Please use one of the templates derivative or extract. / CC BY-SA 4.0 (cropped)
- Commonalities in the mechanisms that generate rhythms: “PhotinusCarolinus” National Park Service / Public domain (cropped)
- Related lab (Biological Rhythms (Hiroshi Ito) Lab): “Interplay between the central and peripheral circadian clocks” Davide Gnocchi, Matteo Pedrelli, Eva Hurt-Camejo, and Paolo Parini / CC BY 4.0 (cropped)
- Related lab (Creativity Lab): “Sarikei Innovation Centre co-working space 1” Cerevisae / CC BY-SA 4.0 (cropped)
- Related lab (Creativity Lab): “Double Diamond by the Design Council” Design Council / CC BY 4.0 (cropped)
- Related lab (Mathematical Biology Lab): “Maritime beacon and a flock of birds on the silt at sunrise, Parque Tejo, Lisbon, Portugal julesvernex2” Jules Verne Times Two / CC BY-SA 4.0 (cropped)
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