Drying Rate and Product Quality Evaluation of Roselle (Hibiscus sabdariffa L.) Calyces Extract Dried with Foaming Agent under Different Temperatures

Table 7

The Arrhenius parameters for colour degradation.

T (°C)	Nonfoam				Foam
	(min^−1)		0^6	Ea; (kJ mol^−1)	(min^−1)		0^2	Ea; (kJ mol^−1)
40	0.0012	0.82	2.4	55.55	0.0030	0.92	4.4	30.86
50	0.0030	0.86			0.0048	0.93
60	0.0043	0.87			0.0061	0.87