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Haematoxylin

Haematoxylin is extracted from the wood of the logwood tree[?]. When oxidised it turns a rich blue-purple colour and is used, together with a suitable mordant, to stain cell nuclei prior to examination under a microscope.



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Thomas a Kempis

... by the Brethren of the Common Life[?]. He became skilful as a copyist and was thus enabled to support himself. Later he was admitted to the Augustinia ...

 
 
 
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