Table 4.

Kinetic parameters of anthocyanin loss and variation of component a* during accelerated storage of black cherry powder colorant

Indicator	Temperature (°C)	Model	R	R2	R2 adjusted	F	p	k*
Antho-cyanins loss	45	PA = 1,7414t-4,689	0,9776	0,9558	0,9495	151,3482	0,000,005	1,7414
	50	PA = 2,2122t + 5,4275	0,9886	0,9773	0,9744	343,7977	0,000,000	2,2122
	55	PA = 2,6763t + 19,015	0,966	0,9331	0,922	83,7291	0,000,096	2,6763
Compo-nent a* variation	45	ln a* = -0,0023t + 1,5164	0,9836	0,9674	0,962	177,9956	0,000,011	0,0023
	50	ln a* = -0,0078t + 1,5194	0,9934	0,9869	0,985	526,3325	0,000,000	0,0078
	55	ln a* = -0,0126t + 1,498	0,9768	0,9542	0,9485	166,6696	0,000,001	0,0126

^*Expressed as %.d⁻¹ and d⁻¹ for anthocyanin loss (zero order) and variation of the component a* (first order), respectively