Determination of Excreted ^<15>N in Rats Fed on Nondialyzable Melanoidin Prepared from a Model System of Glucose and ^<15>N-Glycine(Food & Nutrition)

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Rats were fed for one day on a diet containing nondialyzable ^<15>N-melanoidin prepared in a model system of glucose and ^<15>N-glycine, and the excreta were collected over the following 7-day period. The total amounts of ^<15>N excreted in the feces and in the urine were 80.9 % and 1.95 %, respectively, of ^<15>N in the melanoidin fed to the rats, indicating that melanoidin was difficult to excrete. The urea-^<15>N content in the ^<15>N of the urine was found to vary from 2.4 to 14.0 %, and the ratio of ^<15>N in the urea to that in the urine was found to be large on the early and late days after the administration of ^<15>N-melanoidin. Compared to the nondialyzable melanoidin fed to the rats, the melanoidin excreted in the feces was characterized by elevated percentages of melanoidin components with pi from 2.73 to 2.90 and of those retained at the charged area, and was difficult to be electroforesed by electrofocusing.
社団法人日本農芸化学会の論文
1989-07-23