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The effect was studied of the pH of the amino-carbonyl reaction on the photodegradation of model melanoidins. Nondialyzable model melanoidins were prepared from glucose and lysine with or without initial pH control to 7.0.: 2mol/l phosphate buffer (buffer-melanoidin) and pH adjustment at the reaction start with NaHCO 3 (NaHCO 3 -melanoidin). Melanoidin was also prepared from glucose...
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