Talk:Urtica dioica

message: This disputed edit by  is based on early-stage primary research represented in the proposed sources. It also contains misinformation that nettles are a dietary source of antioxidants. There is no WP:MEDRS evidence that nettles have any antioxidant or nutritional value in vivo as a feed supply. None of the sources provided indicates use of dietary nettles as a common practice in poultry farming, so remains WP:UNDUE. Further, Herrmannr is edit-warring, WP:3RR, and is warned to first obtain consensus on the talk page before further reverting per WP:BRD and WP:CON to establish consensus among other editors. Zefr (talk) 15:58, 13 December 2022 (UTC)
thread_title:  Poultry supplement sources are primary research 

message: According to Flora of North America, there are several subspecies, two of which are indeed native to North America. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=220014002 98.118.134.179 (talk) 19:45, 7 June 2023 (UTC)
replies: text: However, they are not currently accepted by Plants of the World Online as a subspeices of U. dioica. They classify one as the full species and the other as a subspeices as Urtica gracilis subsp. holosericea. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:286576-2 The text should certainly reflect that other sources continue to regard them as subspecies of U. dioica, but currently on Wikipedia we follow POWO for deciding what is or is not a "real" species. If no one else wants to do it I will get around to the issue of subsp. holosericea along with my ongoing cleanup to Urtica gracilis as a full species. MtBotany (talk) 20:19, 7 June 2023 (UTC)
thread_title:  Nativity 

message: # Mechanics 
The mechanics can be compared to the mechanism of a plastic pipette used in biochemistry: the tip penetrates through the skin and as the more the trichome gets bent, the more its content is emptied under pressure.  https://www.youtube.com/watch?v=VvvmGmat55Q&ab_channel=TomRocksMaths
# Chemicals
"It is commonly thought that the compound which causes the pain is formic acid (the same substance which stinging ants inject) but that is now known to be untrue regarding Stinging Nettle." 
More on the list of chemicals: http://wildflowerfinder.org.uk/Flowers/N/Nettle%28Stinging%29/Nettle%28Stinging%29.htm
* silicon dioxide, Phytolith and/or Cystolith are also responsible for the sharp trichomes
* MONOAMINES
*  serotonin, histamine and acetylcholine, but although all three are super-irritants, experimental injection under the skin still does not unleash the full stinging experience of nettles. Therefore other substance(s) must also be involved.
* MOROIDIN;  consists of 8 differing moieties, 6 of them contained within two fused rings. The exocyclic moieties are PyroGlutamic Acid (bottom left corner) and Arginine, (top right). Attached to PyroGlutamic Acid on the first ring, and going clockwise, are: β-Leucine, Leucine, Valine and Tryptophan (with part of the Tryptophan molecule attaching at the top between Valine and Arginine). Those attached to the Arginine at top right, going clockwise, are Glycine and Histidine, which adjoins Tryptophan in the left ring. Have you got that?
These substances are bicyclic peptides and tend to be highly resistant to digestion within the stomach and can persist in the digestive tract. Although not present in Nettle, there also exists a plethora of other bicyclic polypeptides such as α-Amanitin, the highly toxic principle responsible for many fatalities after consuming Death Cap (Amanita phalloides) mushrooms. Cyclosporin A, a synthetic mono-cyclic polypeptide is used as an immunosuppressant drug in organ transplants. Echinomycin is another bicyclic polypeptide produced within various bacteria and is used medicinally as an antibiotic. There are hundreds more.
* LEUKOTRIENES
Thy for complementing, no more time, SvenAERTS (talk) 00:34, 11 July 2023 (UTC)
thread_title:  Mechanics & chemicals in the stinging trichomes