Polarised light micrograph of murexide,also known as ammonium purpurate or Roman purple. A common test for the presence of acid in urine depends upon the formation of murexide (an ammonium salt),which is an intense reddish purple. It was formerly used in dyeing calico,and was obtained in large quantities from guano. Magnification: x270 at 10cm wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Lowry, Steve |
Taille de l’image : | 3872 px × 2592 px |
Model Release : | Non requis |
Property Release : | Non requis |
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