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Lichen spot tests : ウィキペディア英語版
Spot test (lichen)
A spot test in lichenology is a spot analysis used to help identify lichens.〔Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ISBN 978-0-300-19500-2〕 It is performed by placing a drop of a chemical on different parts of the lichen and noting whether there is a color change associated with that chemical.〔
The most common chemicals (reagents) used in lichen spot tests and abbreviations for their results are:〔
* K - A 10% solution of potassium hydroxide
* C - A strong solution of bleach (sodium hypochlorite, NaClO), such as undiluted laundry bleach
* P - a solution of ''para''-phenylenediamine, made by placing a drop of 70% isopropyl alcohol on a few para-phenylenediamine crystals, which lasts about an hour, or by other more long lasting means
These may be used individually, or in combination. The test results are then indicated with a "+" or "-" sign following the letter or combination of letters, followed by the color observed if "+". For example, "K+ orange, C-, P-" means the part of the lichen tested turned orange with the potassium hydroxide, and had no reaction to the C and P. "K-, C-, KC+ red, P-" means no reaction to K, C, or P, but turning red when both K and C are applied.

==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Spot test (lichen)」の詳細全文を読む



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