Chiba
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==Backgrounds== | ==Backgrounds== | ||
===Marimo?=== | ===Marimo?=== | ||
| - | Sorry! Under construction. For information, please see the [http://en.wikipedia.org/wiki/Marimo wikipedia article]. | + | Sorry! Under construction. For information, please see the [http://en.wikipedia.org/wiki/Marimo wikipedia article].<br> |
| + | *できれば、リンクで済まさないで、なんとか文章を入れたいところ。byとよたろ | ||
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As written above, marimos is the most popular algae in Japan, since algae is not a quite popular organism... When you come to Japan, you absolutely come across to Marimo in aquariums, TV programs or Mangas :) | As written above, marimos is the most popular algae in Japan, since algae is not a quite popular organism... When you come to Japan, you absolutely come across to Marimo in aquariums, TV programs or Mangas :) | ||
Revision as of 22:35, 26 October 2007
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Introduction | Project Design ( 1.Sticky Hands | 2.Communication | 3.Size Control ) | Making Marimos | Our Goal || Team Members | メンバ連絡簿 |
Introduction
Chiba University iGEM07 team's project is to make a Marimo-ish gathering of bacteria. Marimo is a green spherical shaped algae, which is a popular living organism in Japan as a National Treasure. We borrowed the name Marimo because of its name publicity (maybe only in Japan, which we didn't notice until recently) and their marvelous velvet which charmed us so much. Our motivations for making Marimo bacteria is as follows.
Why Make a "Marimo"?
Making 3D colonies- for next generation (lazier) molecular biologists
For years microbiologists have been using agar plates to isolate cells from each other. By spreading the diluted cells on a solid surface, we can make "colonies", dome-shaped gathering of genetically identical cells. Although convenient, this is only two-dimentional. What if we can create three dimentional (spherical) colonies with controlled/ defined size? Thus we can eliminate the plating process that everybody hates. Combined with the microfluidics devices, we might be able to pick, isolate, count, or innoculate each of the floating yet independent colonies to conduct routine works in future molecular biology. Crazy thought? Well, that is exactly what our advisors say.
Toward the control the population size of the bacteria community
Even in the bacteria community, sometimes they need to do the population control. This is especially so when we think about the chemical production using bacteria robots.
Besides the above illogical/ unjustified reasons, we think this project leads to the behavior control of the bacterial comunity. Lots of challenge in the project including diffusion control of small/ large molecules, chemical production/ degradation balancing,.....
Backgrounds
Marimo?
Sorry! Under construction. For information, please see the wikipedia article.
- できれば、リンクで済まさないで、なんとか文章を入れたいところ。byとよたろ
How Marimos are Made
Spherical marimos are formed through the growth of a core which is a fragment of ancestral marimos. So when you watch the cross section of the spherical marimo, you do not recognize a core-shell structure in it. How about the most ancestral marimos? It is expected that the most ancestral marimos had a core made of inorganic materials such as cray particles or sand solids. 球形の毬藻は，他の崩れた毬藻断片を核として放射状に伸びることによって出来る．よって成長後の球形毬藻は全て一様で核が存在しない．ちなみに最初の無核球形毬藻は，他の泥や砂などを核として成長し崩れた毬藻断片を核としたと考えられている．（イメージ図）
References:
- 阪井與志雄，マリモの科学，北海道大学図書刊行会, 1991 (Yoshio Sakai, Marimo no Kagaku（"The Science of Marimo"))
- 中沢信午，マリモはなぜ丸い その生態と形態，中公新書，1989 (Shingo Nakazawa, Marimo wa naze marui ("Why marimos are spherical"))
Motivations
この内容だと、毬藻にできたら、何に応用できるか？という話なのだから、イントロ全体を変えないといけないと思う。細胞エンジニアリングの話だよね。んで、３次元細胞集合体をつくるということに頭をひねってみた。ちなみに細胞集合体で日本で有名なのは毬藻なんです、みたいな流れでないと。そうしたら、毬藻の生態の説明なんてごくわずかでも構わない（wikipediaにリンクだけっていうのも愛嬌で済むし）。by とよたろ
