What goes on in a homeopathic remedy solution has been a mystery up until now, because we had no instruments powerful enough to detect the presence of nanoparticles. Recently scientists at the Indian Institute of Technology in Bombay detected the presence of nanoparticles of the original starting substance, in homeopathic remedies so dilute that they could not possibly contain even a molecule of the substance according to the chemistry we studied in high school.
I understand that the nanoparticles of the original substance have been found in homeopathic remedies which are so dilute that according to the chemistry they shouldn't contain even a single molecule of the original substance?
The original sentence is a bit confusing to me because of the comma before "in" (I'm not sure it should be there) and I'm also not 100% sure whether "so dilute" refers to the homeopathic remedy (by the way, I think it should say "so diluted").
Top answer
The "dilute" form here is the adjective, not the verb. It is describing the nanoparticles previously mentioned. What goes on means what occurs or what takes place.
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So it's saying that in homeopathic remedies they found nanoparticles of the original substance and that these nanoparticles (in this homeopathic remedy) were so dilute that according to chemistry taught at school these particles shouldn't contain even a molecule of this original substance?