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GMU:DIY Biolab “Driver’s License”/Yang Li (view source)
Revision as of 15:50, 31 March 2018
, 31 March 2018→1. Introduction
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Under different pH conditions, the hydroxyl (OH) and/or methyl ether (O-CH3) groups attached to the carbon rings (figure 1) undergo reversible structural transformations and ionizations. Restructuring a molecule changes the way it ab- sorbs light, giving rise to colour changes [4]. | Under different pH conditions, the hydroxyl (OH) and/or methyl ether (O-CH3) groups attached to the carbon rings (figure 1) undergo reversible structural transformations and ionizations. Restructuring a molecule changes the way it ab- sorbs light, giving rise to colour changes [4]. | ||
[[File:Screen Shot 2018-01-31 at 12.08.56.png|800px | [[File:Screen Shot 2018-01-31 at 12.08.56.png|800px|Chemical diagram of colour-changing anthocyanin pH reaction [5]]] | ||
1.2 red cabbage | 1.2 red cabbage | ||