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Science

Conan the Bacterium 34

An anonymous reader writes "The world's toughest organism, able to withstand thousands of time more radiation than a human, is reported by the Weizmann Institute to have its secret to survival as a tightly packed DNA ring. Their Science article indicates that radiation-induced breakages are held tightly packed rather than floating off into the intracellular fluid. The bacteria,Deinococcus radiodurans, was discovered decades ago in canned food that was sterilized using radiation. Red patches appeared in the cans - colonies of the bacterium - setting off questions as to how it could have survived."
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Conan the Bacterium

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  • NExt up: (Score:5, Funny)

    by Unknown Poltroon ( 31628 ) <unknown_poltroon1sp@myahoo.com> on Friday January 10, 2003 @01:41PM (#5056740)
    They can have a sample of the chlorox resistant mildew in my shower. I think its started feeding on the bleach, rather than being harmed by it.
  • by jpsst34 ( 582349 ) on Friday January 10, 2003 @01:59PM (#5056958) Journal
    ... that this stuff doesn't get too close to my homebrew.
  • The reference, in case you didn't get it, is from this: Conan the Librarian [textfiles.com]

    • What's wrong with Conan the Barbarian? It's even alliterative, and alludes to survivorship. But you knew this

      I like that the name "radiodurans" encapsulates literally the bacteria's claim to fame. How about "Radioduran the Radical"?

      "The red bacterium can withstand 1.5 million rads-a thousand times more than any other life form on Earth and three thousand that of humans" -- do they mean all life forms complex and bacteria plus other single-celled organisms? If so, I would indeed wonder whether this bacteria came from somewhere else ... but if it has ancient origins, isn't it odd it didn't evolve away from mechianisms designed for an absent danger, which I assume entail some cost to the organism? The writer does mention the resistance might be good for drought also. Fascinating.
    • Evolve away? How?

      Not that they're immune from evolution, but I'd imagine that a species with a much lower mutation rate than normal is not going to change very often.

    • Conan the Barbarian Conan the Destroyer Conan the Submarine Conan the Aircraft Carrier Conan the Heavy Cruiser etc, etc.
  • ...inject it into Keith Ritchards and see if it survives!
  • these are the best bacteria to store information in. altho is 1000x human rad resistance that good ? what is cockroaches' rating ?
  • by skwang ( 174902 ) on Friday January 10, 2003 @04:49PM (#5058697)

    For a numerical comparison I found some rough numbers for what other living organisms can survive. The unit of radiation used is a Gray, which is the unit used to measure the absorbed dosage of radiation. It does not tell relate the biological effects of that radiation.

    These numbers are ones I received from a radiation safety lecture at CERN. I can't vouch for the authenticity of the numbers. But remember, they are obtained from non-controlled experiments (like nuclear accidents) and are an estimates of the amount of dosage needed to kill said organism.

    • Animal________Grays(Gy)
    • Sheep_________1.6
    • Donkey________1.6
    • Swine_________2.0
    • Goat__________2.3
    • Dog___________2.7
    • Man__________2.7,2.4,2.3 (depending on study)
    • Rabbit_________8.4
    • Rat___________9.0
    • Mouse________11-12
    • Desert Mouse__13-15
    • Frog_________30
    • Snail_________200
    • Amoeba_______3000

    Now according to the Science magazine article, the bacteria, Deinococcus radiodurans can stand up to 15,000 Gy of radiation!

    • by Anonymous Coward on Friday January 10, 2003 @05:29PM (#5059062)
      There is a researcher at my university who works with D. radiodurans. His favorite picture to show is a petri dish of happily growing bacteria next to the pyrex beaker they were previously irradiated in. The radiation they were subjected to was so intense the glass beaker is discolored and brittle - but the bacteria survived.
    • As remarkable a feature as this is, there surely must be a metabolism cost. It would be interesting to see the matabolism efficiency scores next to the radiation scores.
  • Hey. I read an article by that title about this when I was in high school. That was at least 4 years ago. Thats old news, even by /. standards.
  • a gene transplant therapy from this tough little bug, and I've got it made. here I come, wheres the red button.

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