Drying Kinetics and Quality of Whole, Halved, and Pulverized Tiger Nut Tubers (Cyperus esculentus)

Table 3

Drying conditions and results of drying time, moisture content, reducing sugars, vitamin c browning index, colour parameters, and effective moisture diffusivity for dried tiger nuts.

State of tiger nut	(°C)	DT (min)	MC (% d.b)	RS (mg/100 g)	Vit C (mg/100 g)	BI (Abs unit)				(m^2/s)
Halved	60	960	10.26	125.79	23.58	0.19	56.97	2.37	19.92	6.40
Halved	50	1080	16.02	154.89	24.09	0.21	50.81	2.93	18.86	6.77
Whole	70	960	8.38	133.11	17.93	0.18	53.12	3.66	19.57	8.42
Pulverized	70	780	0.84	157.01	22.9	0.21	53.9	1.6	17	41.59
Whole	50	1080	20.4	148.61	18.62	0.21	52.51	1.53	20.33	5.67
Halved	70	900	6.71	158.18	22.96	0.19	52.07	2.85	18.53	9.33
Pulverized	50	1080	4.53	142.6	23.08	0.24	55.53	4.16	19.81	31.88
Pulverized	60	960	1.49	136.24	22.78	0.25	53.9	1.6	17	36.0
Whole	60	960	13.25	140.12	18.43	0.22	52.51	2.42	19.1	6.00

: air temperature; DT: drying time; MC: moisture content; RS: reducing sugars; Vit C: vitamin C; BI: nonenzymatic browning index; : whiteness; : redness; : yellowness; : effective moisture diffusivity.