Table 2. Microbial reduction in oyster mushrooms after UV-C treatment at different exposure times¹⁾

Exposure time (sec)	Number of colonies			Microbial reduction
	Number of colonies			Log			Percentage
	24 h	48 h	72 h	24 h	48 h	72 h	24 h	48 h	72 h
0 (Control)	30.67±9.73^2)a3)	30.58±9.98^a	31.25±9.63^a	0	0	0	0	0	0
20	19.33±4.80^b	5.25±1.64^b	1.16±0.43^b	0.20	0.77	1.43	50.66	82.83	96.28
30	15.42±3.75^c	4.25±1.32^c	0.51±0.10^c	0.30	0.86	1.79	61.52	86.10	98.36
40	11.08±2.28^d	2.83±0.71^d	0.06±0.03^d	0.44	1.03	2.73	76.58	90.74	99.81
50	7.58±2.35^e	2.25±0.80^e	0.03±0.01^e	0.61	1.13	3.09	75.84	92.64	99.92

Two-way ANOVA analysis (p<0.05) showed that mean values for different exposure time were significant, whilst insignificant for samples’ positions.
All values are mean±SD.
Different superscript letters (^a-e) within a column indicate significant differences at p<0.05 by Tukey’s test.