TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A functional group (as nitroso, nitro, azo, or the conjugated unsaturated grouping of quinone) that gives rise to color in a molecule and that with the assistance of an auxochrome (as a hydroxyl or amino group) produces a dye.  3, record 1, English, - chromophore

Record number: 1, Textual support number: 1 OBS

Dyes are sometimes classified on the basis of their chief chromophores.  4, record 1, English, - chromophore

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Portion de la molécule d'une matière colorante servant de support aux auxochromes.  3, record 1, French, - chromophore

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Cellulose and hemicellulose are inherently white and do not contribute to pulp color. It is generally agreed that "chromophoric groups" on the lignin are principally responsible for color; oxidative mechanisms are believed to convert part of the lignin's phenolic groups to quinone-like substances that are known to absorb light. Heavy metal ions (e.g., iron and copper) are also known to form colored complexes with the phenolic groups. Extractive materials can contribute to the color of mechanical pulps made from resinous woods.  2, record 2, English, - chromophoric%20group

Record 2,  Textual support,  French

Record 2,  Textual support,  Spanish