Table 2.

pH of mouse urine after 2 wk of dietary supplementation with 1% NH₄Cl

1 h after light onset		8 h after light onset
Control mice	NH4Cl-fed mice	Control mice	NH4Cl-fed mice
8.05	Quantity insufficient	7.61	5.87
8.53	5.90	Quantity insufficient	5.73
7.93	5.89	7.01	6.01
7.08	6.26	6.85	Quantity insufficient
7.33	Quantity insufficient	Quantity insufficient	5.88
Quantity insufficient	6.73	Quantity insufficient	5.41
7.83	6.13	7.24	5.86
7.85	6.21	7.22	5.65
7.74	6.52	7.12	6.18
7.72	5.96	6.78	5.64
Mean ± SD, 7.78 ± 0.41	Mean ± SD, 6.20 ± 0.30a	Mean ± SD, 7.12 ± 0.28b	Mean ± SD, 5.80 ± 0.23ab

Control mice received a standard rodent diet; experimental mice received a standard rodent diet containing 1% NH₄Cl. Animals were maintained on the respective diets for 2 wk before pH levels were measured 1 h and 8 h after onset of the light phase of the photoperiod

^aSignificant (P < 0.01) difference between values for NH₄Cl-fed and control mice at the same time point

^bSignificant (P < 0.01) difference between samples collected at 1 and 8 h