Table 4. Shelf life extension of oyster mushrooms by UV-C irradiation under ambient and refrigerated storage conditions

Exposure time (sec)	Storing after disinfection (days)		Prolongation of shelf life
	Room temperature	Refrigerator	wrt* control at room temp.		Room temp vs refrigerator
			Room temp.	Refrigerator
0 (Control)	3	5	1.00	1.67	1.67
20	5	8	1.67	2.67	1.60
30	5	9	1.67	3.00	1.80
40	6	12	2.00	4.00	2.00
50	5	8	1.67	2.67	1.60

wrt, with reference to.