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Natural Environment Circulation Lab
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The lab explores how everyday chemicals affect aquatic life and how to reduce their release into the environment.

AboutAbout the lab
Exploring how chemicals and the environment can coexist
The Natural Environment Circulation Lab studies how chemicals affect the environment and living organisms, and how to manage them.
Our daily lives benefit from many chemicals, but their harmful effects on humans and wildlife cannot be overlooked.
The lab believes chemicals should be managed with the whole life cycle in view, from production through use to disposal.
The lab conducts research and education as a collaborative chair at the National Institute for Environmental Studies in Tsukuba.
Key terms
- Collaborative Chair
- A system in which researchers at a research institution outside the university serve as faculty and supervise graduate students at that institution
- Endocrine-disrupting chemicals
- Chemicals that may disrupt the function of hormones in the bodies of living organisms
- Carbon recycling
- The idea of capturing emitted carbon dioxide as a resource and reusing it in fuels, materials, and other products
ResearchResearch themes
The lab clarifies how chemicals affect aquatic organisms and proposes ways to reduce those effects. It also investigates how plastic additives and similar substances are released from waste recycling sites.
*Illustrative imageEffects of Chemicals on Aquatic Organisms
Using plankton, medaka, water fleas (Daphnia), amphipods, algae, and other organisms, the lab investigates the environmental effects of endocrine-disrupting chemicals, pharmaceuticals, pesticides, household products, plastics, and more. It also incorporates effluent management methods based on biological responses, and proposes ways to reduce these effects.
*Illustrative imageChemical Emissions from Recycling Facilities
The lab develops analytical and testing methods to clarify the actual state and mechanisms by which plastic additives and nano- and microplastics are released into the environment from waste recycling facilities. It also conducts research on carbon recycling, which aims to reduce carbon dioxide emissions.
MembersFaculty
- Visiting ProfessorHiroshi Yamamoto
- Visiting ProfessorHidetoshi Kuramochi
- Visiting Associate ProfessorTakahiro Yamagishi
- Visiting Associate ProfessorHaruna Watanabe
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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: “Large microscope used for counting microplastics found in water sample” Public domain. / Public domain (cropped)
- Effects of Chemicals on Aquatic Organisms: “Daphnia magna asexual” Dieter Ebert, Basel, Switzerland / CC BY-SA 4.0 (cropped)
- Chemical Emissions from Recycling Facilities: “Bales of PET bottles closeup” Grendelkhan / CC BY-SA 4.0 (cropped)
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