Re: RNA World Problem

On Dec 23, 1:09=A0pm, dadapapa <dadap...@xxxxxxxxxxxxxx> wrote:
Hi Tom,

On Dec 19, 7:03=3DA0am, "Tom Hendricks" <tom-hendri...@xxxxxxx> wrote:



1. Life began as the most stable chemical reaction to the environment
(stable in both keeping what works and altering what needed fixing for =
mo=3D
re
stability)
2. The environment that was most likely on earth during the origin was =
ho=3D
t
with the bombardment phase turning the oceans to steams more than once.=
I=3D
t
also had heavy bombardment of UV radiation from a weaker sun.

Early Earth likely hosted a multitude of physico-chemical environments
and micro-environments -- many of them likely to fluctuate in time.
Temperature cycles in an RNA world environment are plausible as well
as
up-concentration of reactants due to thermal effects (e.g. evaporation
or freezing
of solvent).

Hot environment has some very positive aspects to it - hot speeds up
chemical processes, hot would suggest a PCR type environmentally forced
replication of RNA strands, =3DA0hot gets results like the Miller - Ure=
y
experiments.

The following links might be of interest for you:

Non-enzymatic nucleic acid polymerization and replication:http://flint.sd=
u.dk/research/polymerization.html

and

Does the RNA-World Still Retain its Appeal After 40 Years of
Research?http://www.springerlink.com/content/n355000830941242/
in case you have access to scientific journals.

- harold -

What time are we talking about here?
And remember we had the UV problem till about 2.5.bya

.

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