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Mot de passe perdu? S'inscrire

19-03-2019 17:12

Per Marstad Per Marstad

We have found this to day, on Betula pubescens.Ca.

18-03-2019 23:10

Patrice TANCHAUD

Bonsoir, récolte réalisée sous pins (seul coni

18-03-2019 19:41

Per Marstad Per Marstad

We have found this to-day, in Norway, ca. 1 mm in

18-03-2019 21:48

Ethan Crenson

Hello again,On the same branch as my previous post

17-03-2019 22:26

Ethan Crenson

Found yesterday in New York City.  Substrate is a

18-03-2019 12:06

Enrique Rubio Enrique Rubio

Hi to everybodyThese minute, white, sessile, pruin

18-03-2019 11:32

Peter Püwert Peter Püwert

Hi all, here I find no solution. Apos max. 1 x o,

11-03-2019 14:02

Elisabeth Stöckli

 Bonjour, Récolté sur branche morte de lierre

17-03-2019 21:38

Ethan Crenson

Hello all, In New York City yesterday I came acro

17-03-2019 10:12

Pintos Angel Pintos Angel

Good morning,  has anybody information about Nect

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Nannfeldt and UV - what wavelength?
Viktorie Halasu, 29-05-2018 19:42
Viktorie HalasuHello forum,

J.A.Nannfeldt in his 1966 paper ("On Otidea caligata, O. indivisa and O. platyspora") wrote about UV fluorescence which he had been testing in Otidea with rather promising results, planning to publish them later. However, I didn't find any later paper by him about this matter. Would anyone know, what wavelength of UV he actually used? Harmaja used 254 nm, Parslow et Spooner both 254 and 365 nm, but I didn't find any data about/by Nannfeldt. He wrote his interest in UV fluorescence was inspired by Rolf Santesson who showed him some examples of its use on lichens. So perhaps it's question for a lichenologist..

Thank you in advance.
Viktorie
Viktorie Halasu, 31-05-2018 21:18
Viktorie Halasu
Re : Nannfeldt and UV - what wavelength?
After having read a bit about lichens and also some Santesson's papers from that period, I think it might have been anything in the near and middle UV range (200-400 nm). Probably several wavelengths were used to demonstrate different chemical compounds.