... concentrations of Na+ and K+ were identical across all groups. On the other hand, the BUN levels of the NaCl plus chitosan-treated groups were lower than that of the control group. This finding on the ... inorganic materials, and proteins were then removed with 1 N NaOH to produce chitin. The chitin was then centrifuged and washed with distilled water, ethanol, and ether, in order, and vacuum dried ... progressively with aging and in all groups to a similar extent. The control SHR gained more weight than the other groups, and after week 8, the body weight tended to be lower in the NaCl plus...