Vinardell P, Bolufer J
Exp Gerontol. 1984;19(2):73-7. doi: 10.1016/0531-5565(84)90008-1.
Jejunal absorption of D-Glucose, D-Galactose and L-Arabinose was studied in 21-23 day, 2-3 month and 18 month-old rats for 5 minute periods using a perfusion technique. Sugar concentrations were: 2.5, 5, 10, 20 and 40 mM at each age. In some experiments phlorizin was used to determine the diffusional component of absorption. The saturation for D-Glucose was at 10 mM and 5 mM for D-Galactose. A reduction in the rate of total sugar absorption was observed with aging. Moreover, the active transport/simple diffusion ratio also decreases with age, specially at low substrate concentrations.
采用灌注技术，对21 - 23日龄、2 - 3月龄和18月龄的大鼠进行了5分钟的空肠对D - 葡萄糖、D - 半乳糖和L - 阿拉伯糖吸收的研究。每个年龄段的糖浓度分别为：2.5、5、10、20和40 mM。在一些实验中，使用根皮苷来测定吸收的扩散成分。D - 葡萄糖的饱和浓度为10 mM，D - 半乳糖为5 mM。随着年龄增长，总糖吸收速率降低。此外，主动转运/单纯扩散的比例也随年龄下降，特别是在低底物浓度时。
