Have we all been looking in the wrong place?
Are Di Lazzaro’s laser-generated pulses of uv radiation
actually targeting that S1 lignin, not “cellulose”
Colin Berry, looking through a microscope sees something. We’ll get to that. But first, parenthetically, he informs us know:
(sorry about the poor resolution,” he says in parentheses, “but that’s probably due to the cylindrical 3D light-reflecting/bending geometry of linen fibres).
He goes on:
See the link to a paper reporting from detailed microscopy – light and electron microscope- that some of the lignin of flax bast cells (as used for linen) is not only inside the fibres, but in the S1 layer that would put it just below the PCW.
When Colin writes, “See the link…” I think he is referring to Lignification in the flax stem: evidence for an unusual lignin in bast fibers. We find that in his blog. Colin continues:
Have we all been looking in the wrong place? Are Di Lazzaro’s laser-generated pulses of uv radiation actually targeting that S1 lignin, not “cellulose” as claimed, generating hot spots that may then cook what’s around them? First Law of Photochemistry: light – regardless of wavelength or how generated – has first to be absorbed by one or more chromophores for there to be any chemical reaction – which would include faint yellow/brown coloration. So the first priority of photochemists (I can’t speak for laser physicists) is to identify your chromophore. Uv light is far more likely to target an aromatic compound like lignin, albeit as a minor constituent of linen, than a non-aromatic carbohydrate like cellulose.
Have we all been looking in the wrong place? That’s one question. It’s a good one.
Another one comes to mind. Colin didn’t ask this. I am. At what point is increased contrast more detrimental than helpful by introducing exaggeration, blocking detail and creating image artifacts? At what point does reliance on increased contrast cross the line between science and pseudoscience?