Hexnet Hexagonal Tag Feed: organic chemistry A feed of tagged nodes. https://hexnet.org/blog Hexagonal molecules in atomic force microscopy <p> Recent advances in microscopy have allowed the direct imaging of molecular bonds for the first time. Here we see several images highlighting the hexagonal structure of several hydrocarbons. </p> Sat, 03 Jul 2010 06:16:02 +0000 https://hexnet.org/content/hexagonal-molecules-atomic-force-microscopy https://hexnet.org/content/hexagonal-molecules-atomic-force-microscopy The PAH world as Hexagonal Overmind, etc. <p> <img src='/files/images/hexnet/ah-7.png' title='Coronene' alt='Coronene' class='image-right'/> I have been reading about the <a class="ex" href="http://en.wikipedia.org/wiki/PAH_world_hypothesis">PAH world hypothesis</a>, and have come to see it as an intriguing indicator of the potentially hexagonal origins of life on earth. </p> <p> Essentially, it is conjectured that, since <a class="ex" href="http://en.wikipedia.org/wiki/Polycyclic_aromatic_hydrocarbon">polycyclic aromatic hydrocarbons</a> are among the most common spaceborne molecules in the known universe, they would have likely been a constituent in the primordial seas of Earth, where they could have provided some sort of scaffolding or template on which early biological polymers such as RNA could assemble, thus solving a frequently-raised objection to the <a class="ex" href="http://en.wikipedia.org/wiki/RNA_world_hypothesis">RNA world hypothesis</a> that RNA is too fragile and transient to survive long outside of an extant cell or similar protective environment. By providing a structural backbone on which reasonably complex RNA strands and such could self-assemble, the PAH world would have given early pre-cellular life a fighting chance of finding its way into protective lipid bubbles, weird mineral formations, or what have you, where given enough replicative iterations it presumably developed into proper cellular life as we know it. </p> Wed, 30 Jun 2010 01:01:59 +0000 https://hexnet.org/content/pah-world-hexagonal-overmind-etc https://hexnet.org/content/pah-world-hexagonal-overmind-etc