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- Xref: sparky sci.bio:2743 sci.cryonics:459
- Newsgroups: sci.bio,sci.cryonics
- Path: sparky!uunet!cis.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnews!cbnewsl!kqb
- From: kqb@cbnewsl.cb.att.com (kevin.q.brown)
- Subject: Deinococcus Radiodurans (Re: Better Living through DNA Encryption)
- Organization: AT&T Bell Laboratories
- Date: Fri, 24 Jul 1992 23:19:19 GMT
- Message-ID: <1992Jul24.231919.7018@cbnewsl.cb.att.com>
- References: <1992Jul19.142233.14640@cssc-syd.tansu.com.au> <g5dmd0h.nagle@netcom.com> <1992Jul22.230106.103@cbnewsl.cb.att.com> <14limiINNjt5@agate.berkeley.edu>
- Lines: 46
-
- ------------------------ Forwarded Message ------------------------
-
- > From: alcor@cup.portal.com
- > Message-Subject: Please post
- > Date: Fri, 24 Jul 92 02:14:38 PDT
-
- > To: Scott Keeney
- > Re: DNA Encryption - Cryomsg #1052
-
- You are considerable more recent and in much greater depth than I am.
-
- Questions;
- 1) Does the term "quadruple-stranded DNA" make any sense to you?
- 2) Where do you normally find *Deinococcus*?
- 3) How many families of radiation-resistant bacteria did you come
- across in your literature search?
- 4) Do these critters actually live in reactors? I understand, in a
- very casual fashion, that the internal flux of an operating reactor is
- about 30,000 rads/hour, so that seems feasable, but steam engineers are
- very fussy about the purity of the water they put through their creations,
- which makes for lousy food prospects. Which is to ask, what do they eat?
- 5) If they live in reactors, where do they get the energy to drive
- their metabolic processes?
- 6) Did you see any speculation on how they might have evolved to meet
- this bizarre challenge? I imply from your remarks that they survive high
- fluxes of hard radiation by simply scaling up the known protective
- mechanisms against oxygen, free radicals, and molecular damage, but this
- sort of thing is usually evolved in response to some environmental
- challenge. I have some trouble imagining what natural challenge provoked
- this degree of adaptation.
- 7) What was the goal of your SOD extraction?
- 8) Was I correct about their degree of radiation resistance, and what
- is normal for most bacteria?
- 9) How well do they resist UV sterilization? Re 6) above, the
- oxygenless atmosphere of the Archean eon is presumed to have allowed
- vacuum UV to get all the way to the surface, and some distance into water.
- A critter that could survive on or near the surface would have an enormous
- advantage until the ozone shield was raised in the late pre-Cambrian era.
- But in that case, why wouldn't we all be a bit more radiation-tolerant?
-
- None of the above is particularly relevant to cryonics, of course,
- but cryonics is merely a means to an end. I know a number of people who
- would like to check out the galactic core and other locations some day.
- Current opinion is that it may be a bit energetic there. Plan ahead.
-
- Hugh at alcor@cup.portal.com
-