单词	diazo
释义	diazo /dʌɪˈazəʊ / /dʌɪˈeɪzəʊ/ (also diazotype) noun [mass noun] A copying or colouring process using a diazo compound decomposed by ultraviolet light: [as modifier]: diazo printers... These man-made compounds have a ring of six carbons (the benzo part) joined to a 7-member ring with 5 carbons and 2 nitrogens indicated by diazo. It is ironic that the human eye, but not the Hitachi 917, can easily distinguish the pink color of the genuine diazo reaction from the white turbidity of the precipitate. These are thought to be formed by the release of nitrogen gas during the photolysis of the diazo group.
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