Please check out my Substack articles for background on this:Nanotechnology in Dental AnaestheticPart 2
and my discussion with Mat & Shimon from 20230512:David, Mat and Shimon
I have also recently uploaded some more videos of the process
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The listed active ingredients of Lignospan Special (the anaesthetic identified at https://davidnixon.substack.com/p/nanotechnology-in-dental-anaesthetics) are lidocaine hydrochloride and adrenaline. Lidocaine is C14H22N2O, adrenaline is C9H13NO3. The excipients are 'Sodium chloride, potassium metabisulfite (E224), disodium edetate, sodium hydroxide (for pH-adjustment) and water for injections'. (https://www.septodont.co.uk/product/pain-management-lignospan-special/) Nothing very exotic in any of these. What would one expect it to do if exposed to air? I would guess nothing, except evaporate, leading to the crystallisation of the salts. I wouldn't expect to see any of the remarkable cascading, bubbling, boundary formation, spinning etc that one sees here.
That light grey curved boundary in the second half of the last video - what is it made of I wonder? It just seems to disappear into a line of bubbles at each end.