Started in on this article (by Matthew Ehret) the other night called The Rise of Optical Biophysics and the Clash Between ‘Two Sciences’ and have not nearly unpacked it enough, however watched a video therein on Louis Pasteur (everyone's favorite guy ); and there are any number of references to him on the forum dealing with bacteria and vaccination pioneering that moves to an unwelcomed lines of force today. Here, the work was on mirrors, such as even drugs have chemical mirrors whereby half the drug does one things and the other, another - or nothing. Odd stuff. Now I knew about Pasteur's work enough from back in time (what most people think of regarding Louis), and was rather reluctant to revisit it by checking the video out - and glad I did because it raised questions starting off with crystals, and then moves to what was being looked at by Louis here as to why polarized light rotated either left or right through crystals - until that is when he discovered 'Left handedness,' more or less.
It was confusing to me when Pasteur found crystals like quartz could be right or left handed in terms of rotating light - how was that possible? Although Louis was not the first to know that crystals could be hemihedral, he followed up on Jean-Baptiste Biot's observations of chirality (mirror) - both left and right hemihedrism through experiment. So, how could two crystal objects sharing the same properties (mirrors of each other) have opposite rotating light properties? This then gets into the liquid medium when this whole subject came up from the contents of a vat of wine (paratartaric). Example being paratartaric grows two crystals - one from tartaric that was an opposite mirror (one is optically active and the other not). In short, it was not the crystal at all, it was the acid foundation and fermentation process that determine right and left optical activity (if I have this correctly), yet there is a point when reached that the balance goes left and right stops (entropic?).
So, one can see what Louis had found is that certain crystals (use quartz here) can have a left handed turn or a right that they could not explain - they were "discoveries into the optical properties of life and the handedness phenomena of life."
Here is one article link from within the original: 'Left-Handed' Amino Acids Still A Puzzle.'
Note: not being a chemist, it raises many more questions of our interaction (in the body and out side the body), and apparently this work of Louis was not well known, yet better to let the video tell the story and correct what I've got wrong here - and 'devoid' of organic materiel is important (life):
It was confusing to me when Pasteur found crystals like quartz could be right or left handed in terms of rotating light - how was that possible? Although Louis was not the first to know that crystals could be hemihedral, he followed up on Jean-Baptiste Biot's observations of chirality (mirror) - both left and right hemihedrism through experiment. So, how could two crystal objects sharing the same properties (mirrors of each other) have opposite rotating light properties? This then gets into the liquid medium when this whole subject came up from the contents of a vat of wine (paratartaric). Example being paratartaric grows two crystals - one from tartaric that was an opposite mirror (one is optically active and the other not). In short, it was not the crystal at all, it was the acid foundation and fermentation process that determine right and left optical activity (if I have this correctly), yet there is a point when reached that the balance goes left and right stops (entropic?).
So, one can see what Louis had found is that certain crystals (use quartz here) can have a left handed turn or a right that they could not explain - they were "discoveries into the optical properties of life and the handedness phenomena of life."
Here is one article link from within the original: 'Left-Handed' Amino Acids Still A Puzzle.'
In short, Pasteur discovered that solutions which had organic material dissolved within them had the incredible property of rotating polarized light to the “left” while liquid solutions devoid of organic material did not hold that capability. This story was told beautifully in the 2010 docu-drama ‘The Space of Life’.
Note: not being a chemist, it raises many more questions of our interaction (in the body and out side the body), and apparently this work of Louis was not well known, yet better to let the video tell the story and correct what I've got wrong here - and 'devoid' of organic materiel is important (life):