| Budget Amount *help |
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2023: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Outline of Final Research Achievements |
We conducted screening of PBP (Potentially Biodegradable Polymers) in various marine environments and found that aliphatic polyesters fall into this category. We identified effective biological triggers for these PBPs from the marine environment. Additionally, we discovered low-molecular-weight compounds that can be used as bio-stimulation-type biodegradation triggers. We evaluated the biodegradation rate in real marine environments of polymers with introduced disulfide bonds as non-biological triggers for PBPs. The biodegradation of these polymers involves two steps: 1) hydrolysis by degrading enzymes, followed by 2) mineralization of the degradation products by microorganisms. In real-world environments, however, these steps 1) and 2) occur within the biofilm formed near the material. To achieve controlled degradation rates, we elucidated this complex system's correlation through plastisphere-metagenome and metatranscriptome analyses.
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