Table 10.

Effect of sampling time on excretion of urinary creatinine, purine derivatives, and urea obtained from total collections after 4-h intervals

Item1	Time of sampling (h)						SEM
	0000 to 0400	0400 to 0800	0800 to 1200	1200 to 1600	1600 to 2000	2000 to 0000
Creatinine, mg	201.65	162.79	144.03	166.14	190.76	152.29	8.51
Creatinine, mg/kg BW	6.47	5.50	4.84	5.75	6.29	5.19	0.25
Creatinine, mmol/kg BW0.75	0.11	0.09	0.08	0.09	0.11	0.09	0.01
PD, mmol1
Goat	1.13Bb	1.74a	1.11Bb	2.46a	1.30Bb	1.54b	0.13
Sheep	2.54Aa	1.49b	2.51Aa	2.53a	2.17Aa	1.34b	0.15
PD, mmol/kg BW0.75
Goat	0.09Bb	0.14b	0.09Bb	0.19a	0.11b	0.13b	0.01
Sheep	0.19Aa	0.12b	0.17Aa	0.20a	0.17a	0.11b	0.01
Urea, g/d	0.68b	0.92a	0.82b	1.14a	0.89b	0.74b	0.05
Urea, mg/kg BW	21.66b	30.35b	26.71b	39.13a	30.81b	27.66b	1.45
PD:C2	1.67	1.80	1.84	2.06	1.99	2.00	0.09
U:C3	3.49b	4.76b	5.01a	5.99a	4.74b	4.90a	0.21

¹PD = purine derivatives.

²PD:C = purine derivatives:creatinine ratio.

³U:C = urea:creatinine ratio.