Table 1. Effects of ages on T₂ relaxation time (ms) and proportion (%) of each relaxation component of the gels

Age/d	22	30	38	46
T₂₁/ms	0.3475±0.10^a	0.34±0.08^a	0.35±0.07^a	0.34±0.07^a
T₂₂/ms	510.50±35.90^a	377.41±28.11^b	500.52±54.94^a	390.56±23.78^b
T₂₃/ms	2,919.12±174.12^ab	2,483.12±185.71^bc	3,283.21±882.92^a	2,265.48±202.54^c
PT₂₁/%	4.68±1.00^a	3.43±0.88^a	4.21±1.44^a	4.44±0.90^a
PT₂₂/%	93.77±0.89^b	95.43±0.40^a	94.65±1.36^ab	94.23±0.79^ab
PT₂₃/%	1.55±0.34^a	1.14±0.50^a	1.04±0.43^a	1.33±0.56^a

Different letters between ages are significantly different (p<0.05).