笹の花( 60-80年に,一度だけ咲きます!) 北海道大学の銀杏並木(秋) 北海道大学の銀杏並木(冬) IMOGでの発表(滝沢) ガスクロマトグラフ-同位体比質量分析計(GC-IRMS)鋭意組み立て中!!! 水槽で飼育している魚達:ハゼとエビの共生 サクラの花 ISCCでの発表(力石) ハエトリソウの花(右奥の葉がハエを捕まえている!) 実験室での植物の栽培(13C, 15Nラベル実験:エンドウマメとトウモロコシ) ゴマの種子とスプラウトからの脂質の抽出 試料採取:神奈川県湯河原町の砂浜
 

Welcome

Organic compounds including carbohydrates, amino acids, and lipids have a large diversity (and a much/less variation) in the stable isotopic composition for H, C, N, O, S, which is cased by isotopic discrimination due to the isotope effect and branched flux on ‘key’ biochemical processes in biosynthetic (or anabolic) and metabolic (or catabolic) pathways in organisms. An identification or assignment of ‘key process’ in these pathways is indispensable for better understanding of the isotopic composition and/or discrimination found in organisms, as well as of the accuracy and precision on the isotope evidence in application studies.
 
We would love to contribute to the understanding in-depth the complex biogeochemical processes in our planet, by using the following studies

  • Illustration of 'energetic ecology' in biogeochemical cycles;
  • Illumination of ‘key process’ responsible for controlling molecular and stable isotopic compositions of organic compounds in organisms’ physiology; and
  • Assessment of ‘universality' based on accurate understanding of 'generality and predictable fluctuation’ or ‘homogeneity vs. heterogeneity’ in the change of molecular and isotopic compositions with respect to the ‘key process’ in biosphere.

To do that, we love/enjoy the challenges for developing new analytical methods of (or new methodologies using) compound-specific or position-specific isotope analysis of organic compounds in natural samples.


People

Yoshito Chikaraishi
Professor 

Yuko Takizawa
Assistant Professor 

Michie Tomoda
Group Secretary  

Bohyung Choi
Postdoctoral Researcher (Sept. 2018 -) 
Informal decision
Postdoctoral Researcher (Jan. 2019 -) 

Undecided

D1
 
Satoshi Sugaya 
B2  


Research Interests

Fundamentals of stable isotope studies

See Poster (180407)

High resolution food web viewd via 15N/14N of amino acids

See Poster (180407)

Advances in compound-specific isotope analysis of amino acids

See Poster (180407)

Coming soon

Coming soon

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Coming soon