Geo-electrochemical Conversion of Amino Acids Induced by Aqueous Alteration in Carbonaceous Planetesimals
Publicly Offered Research
| Project Area | Aqua planetology |
|---|
| Project/Area Number |
20H04608
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
|
| Allocation Type | Single-year Grants |
|---|
| Review Section |
Science and Engineering
|
|---|
| Research Institution | Tokyo Institute of Technology |
|---|
Principal Investigator |
Li Yamei 東京工業大学, 地球生命研究所, 特任助教 (10745128)
|
|---|
| Project Period (FY) |
2020-04-01 – 2022-03-31
|
| Project Status |
Completed (Fiscal Year 2021)
|
| Budget Amount *help |
¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Fiscal Year 2021: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
|
|---|
| Keywords | Carbonaceous chondrite / Asteroid Ryugu / Aqueous alteration / Geo-electrochemistry / Amino acid decomposition / Mineral catalysis / Water-rock interaction / geoelectrochemistry / carbonaceous chondrites / chemical evolution / amino acid / Geoelectrochemistry / Carbonaceous chondrites / Amino acids / Catalysis / Amino acid |
|---|
| Outline of Research at the Start |
Amino acids are essential building blocks of life, and ubiquitously found in carbonaceous chondrites.Their genesis and conversion have important implications on the origin of biomolecules, and the geochemical processes occurred in their parent bodies (carbonaceous planetesimals).
I will investigate the conversion pathways of amino acids, for reaching a systematic understanding on the reaction pathways and kinetics of amino acid conversion. This will be used to evaluate the role of amino acids in chemical evolution and constrain the physico-chemical properties of the associated environments.
|
| Outline of Annual Research Achievements |
I have explored the geochemical processes that shaped organic distributions on the parent icy planetesimals of carbonaceous chondrite. In the past year, I further extended the model to the parent body of carbonaceous asteroid Ryugu. These research results have resulted in one published paper (Nature Communications, 2022) and one manuscript currently under review (Li et al., under review). Our major finding is that aqueous alteration can lead to complex behavior of organics on its parent body, including both synthetic and breakdown mechanisms. If the parent planetesimal is water/rock differentiated, the redox gradients between the water-rich mantle and water-depleted core can drive the decomposition of dicarboxylic amino acids to n-w-amino acids even at low temperature (e.g., 25 oC).
|
| Research Progress Status |
令和3年度が最終年度であるため、記入しない。
|
| Strategy for Future Research Activity |
令和3年度が最終年度であるため、記入しない。
|
Report
(2 results)
Research Products
(9 results)
-
-
-
-
-
-
-
-
[Book] Mineralogy2022
Author(s)
Yamei LI
Total Pages
266
Publisher
Intech Open
ISBN
9781803554662
Related Report
-
