1) Natural dye
Found on
https://www.crosswordclues.com/clue/haematoxylin
Haematoxylin, hematoxylin, Natural Black 1, or C.I. 75290 is extracted from the heartwood of the logwood tree. When oxidized it forms haematein, a compound that forms strongly coloured complexes with certain metal ions, the most notable ones being Fe(III) and Al(III) salts. Metal-haematein complexes are used to stain cell nuclei prior to examinati...
Found on
http://en.wikipedia.org/wiki/Haematoxylin
<chemical> Basophilic stain that gives a blue colour (to the nucleus of a cell for example), commonly used in conjunction with eosin that stains the cytoplasm pink or red. Various modifications of haematoxylin have been developed. The histopathologist's H&E is haematoxylin and eosin. ... (18 Nov 1997) ...
Found on
http://www.encyclo.co.uk/local/20973
Basophilic stain that gives a blue colour (to the nucleus of a cell for example), commonly used in conjunction with eosin that stains the cytoplasm pink/red. Various modifications of haematoxylin have been developed. The histopathologist's 'H & E' is haematoxylin and eosin.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
Haematoxylin is the colouring matter of logwood, or Haematoxylon campechianum. This colouring matter is a constituent part of all the colours prepared with logwood, and the changes which it undergoes by the action of acids and alkalies render it useful as a reagent to detect their presence.
Found on
http://www.probertencyclopaedia.com/browse/AH.HTM
Haematoxylin is the colouring principle extracted from logwood. It forms yellow crystals that are slightly soluble in cold water. It is chemically of a phenolic character, and on oxidation becomes converted into a red substance, haematin.
Found on
http://www.probertencyclopaedia.com/browse/GH.HTM
No exact match found.
