From: John Grigg (starman2100@lycos.com)
Date: Wed Jan 22 2003 - 10:44:20 MST
Message #20935
From: Azt28@aol.com
Date: Tue, 21 Jan 2003 12:03:09 EST
Subject: Re: #20926 nano bla-bla
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>From R. Bradbury (single>):
>> Plain false, you can't extract/destroy/neutralize 10^25 or so toxic
>> anti-freeze molecules with nano-devices in the sub-micrometer range.
>
>The task of molecular sorting is discussed extensively in Nanomedicine
>Sections 3.4.2 - 3.5.9.
>Just a quick glance at the paper on Respirocytes:
>indicates that ~10^15 respirocytes are capable of storing
>~10^24 molecules of O2 in 6 minutes. The primary limit being the constraint
>on heat removal in a "natural" human body. This can certainly be improved
>upon during cryonic reanimation where one could have the body suspended in
>a circulating coolant that controls temperature and removes heat. So IMO,
>Yvan's claim is unsubstantiated.
I stay with what I have said, your diamond tank can't sort out and store at
high pressure the cryoprotectant. Beyond a dream pipe technology, the main
problem is to sort out such molecules from similar looking ones. Simple
washing will discard may be 90% of the product, the problem is with the last
ten percent and that is where you have a sorting difficulty.
>> Simple maths, not tensor calculus are against you. Freezing produces
disorders at
>> sub millimeter level, a nanodevice can do nothing for it. That has been
well
>> explained by Thomas Donaldson not so long ago. More I look at it, more
>> nanotech looks as religion in tech disguise. Sorry I don't buy it.
>
>Sigh. More claims that are unsubstantiated. See:
>
>R. Merkle, "The molecular repair of the brain", Cryonics, 15(1&2)
>(Jan & Apr 1994).
>http://www.merkle.com/cryo/techFeas.html
>and the mechanical manipulation capabilities of nanorobots:
>R. Freitas, Nanomedicine [Section 9.3: Nanomanipulators], Landes Bioscience
(1999).
>and the recent discussion between Ray Kurzweil, Eric Drexler and
>myself:
>http://www.kurzweilai.net/news/frame.html?main=news_single.html?id%3D1587
Nothing new here. Want somthing new?
How these nanothings will see their environment? I suggest a near field
camera looking at subwavelenght resolution: A quantum dot laser would produce
the light and a light detector would seat at the bottom of a carbon nanotube.
The free end of the pipe would scan the light near field to build a picture.
This is Bozzo's tech but it could be Merkle's one :-)
>Thirty years ago, one could not sequence a bacterial genome (period).
>Now the major genome sequencing centers can accomplish this in a couple
>of days. If we really wanted to go to the moon again, I sure we could
>do it within a decade, more probably within 5 years -- its a cost problem
>not a technology problem.
It is a cost, social, political, a technological problem because there are no
more the tools th make the rocket. In short it is impossible today.This is
regression
>> Non local force fields and discontinuous ones may be the big next step in
>> physics and so in instrumentation. That is the key to reanimation
technology.
>
>While you may believe that -- it involves a great deal of hand waving
>and "magic" physics (for example I'd put "quantum computing" in the
>realm of magic physics -- we have hints that it might be possible but
>nobody has managed to translate the fantasy into a reality except on
>a very very limited scale).
Same for nanotech respirocytes :-) and other promises.
> I have given the example of quotien fields everywhere accelerated as a
source
> of light inside the body able to destroy toxic molecules and power
> mitochondria before the general blood circulation start again.
Molecular sorting rotors are much more real than "quotient fields" (whatever
they
are).
You know, the kind of stuff that transmit the explosive power of a string of
cone shapped, high explosives with the help of a radio pulse :-)
In respirocytes article, sorting rotors was 10 nm in diameter, or 100 atoms,
this is more as microtech produced by electronics lithography tech as
molecular nanotech. Using these large system made from one million atoms or
so to select one by one ten atom molecules is a strange idea.
Yvan Bozzonetti.
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