Table 2.

Rate constants (k) and half-life periods (t_1/2) of oleuropein content loss in aqueous extracts from olive leaves at different temperatures (T).

T (°C)	k (Days−1)	t1/2 (Days)
80	0.202 ± 0.00a	3.431
60	0.077 ± 0.00b	9.002
40	0.068 ± 0.00b	10.193
RT l 1	0.053 ± 0.00b	13.078
14	0.111 ± 0.00c	6.245
7	0.075 ± 0.00b	9.242

¹ Room temperature (24 ± 1.4 °C). For each k value, different small letters indicate significant differences among temperatures according to the Tukey test (α < 0.05). The mean values (n = 3) are shown with their standard deviation.