. Cytological technique; the principles underlying routine methods. Histology -- Technique; Cytology -- Technique. ci- Leitco-para- rosanil'me Skeleton-formula for triarylmethane dyes Triphenylpara- rosaniline all the many dyes that have three such rings held together in the + same way, whether any of the rings has an = NH2 group on it or not, are therefore classified together as triarylmethane dyes. In the skeleton-formula for this and other groups of dyes, the auxo- chromes and modifiers are omitted, since these differ from dye to dye. Methyl violet is pararosaniline in which four or five of
. Cytological technique; the principles underlying routine methods. Histology -- Technique; Cytology -- Technique. ci- Leitco-para- rosanil'me Skeleton-formula for triarylmethane dyes Triphenylpara- rosaniline all the many dyes that have three such rings held together in the + same way, whether any of the rings has an = NH2 group on it or not, are therefore classified together as triarylmethane dyes. In the skeleton-formula for this and other groups of dyes, the auxo- chromes and modifiers are omitted, since these differ from dye to dye. Methyl violet is pararosaniline in which four or five of the hydrogens of the amino-groups have been replaced by methyl. This replacement has a strong blueing effect. When all six are replaced, crystal violet is produced; this dye is almost blue. It has already been mentioned (p. 91) that ethyl and aryl groups have still greater blueing effect than methyl. This is well exempli- fied by triphenyl pararosaniline, which, with another closely related dye, constitutes the mixture known as aniline blue SS. Triphenyl pararosaniline is a pure blue cationic dye. It is para- rosaniline in which one of the hydrogens of each of the three. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Baker, John Randal, 1900-. London, Methuen; New York, Wiley
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