We have a big earthquake at approximately 3 am on 6th September.
Although the earthquake give us many problems, all members in laboratory are very fine. Water and electricity are also provided (insufficiently but good enough) on 7th, and we now are in a recoverying stage. Analytical instruments and wet chemistry laboratory may have only a small damages, but unfortunately we need to re-set up aquariums because oxygen-supply and water-purification systems had down for so long time.
Again, please ease your minds, because all members in laboratory are very fine !!
 
9月6日の朝3時頃に,北海道(胆振)で大きな地震がありました。この地震により,北大低温研でも様々な問題が発生しましたが,研究室の全てのメンバーは無事です。水と電気の供給も再開しました。科学分析機器等も基本的には問題なさそうです(確認中)。しかし,残念ながら,水槽で飼育している生物達の多くが★になりました。彼らの命は,必ずサイエンスの発展に役立てるつもりです。

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
Visiting Researcher 
Under consideration
Postdoctoral Researcher (Jan. 2019 -) 

Under consideration

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

Coming soon

Coming soon

Coming soon

Coming soon

Coming soon