Table 1 Changes in the microorganism of fresh-cut Dioscorea bulbifera treated in various condition pr ior to vacuum-packaging dur ing storage

Sample1)	Microorganisms	Viable cell (log CFU/g)
		0 day	30 day	60 day	90 day
		WRT	Aerobic bacteria	1.65±0.882)a3)	1.87±0.72b	2.04±1.26c	3.16±1.34d
Coliform	ND4)		ND	ND	ND
W40	Aerobic bacteria	1.88±0.16a	2.46±0.28a	2.96±0.51b	4.25±0.69bc
	Coliform	ND	ND	ND	ND
W50	Aerobic bacteria	1.75±0.05a	2.62±0.42a	3.14±0.37b	4.77±0.07b
	Coliform	ND	ND	ND	ND
HBRT	Aerobic bacteria	0.95±0.08c	1.34±0.08bc	3.87±0.14a	6.25±0.23a
	Coliform	ND	ND	ND	ND
HB40	Aerobic bacteria	1.34±0.05b	2.34±0.11a	2.62±0.52bc	4.05±0.41c
	Coliform	ND	ND	ND	ND
HB50	Aerobic bacteria	1.22±0.20b	1.96±0.13b	2.37±0.44bc	2.36±0.17de
	Coliform	ND	ND	ND	ND
SBRT	Aerobic bacteria	1.13±0.11bc	1.60±0.30b	3.95±0.26a	6.47±0.41a
	Coliform	ND	ND	ND	ND
SB40	Aerobic bacteria	1.20±0.15bc	1.46±0.28bc	1.98±0.10c	3.11±0.25d
	Coliform	ND	ND	ND	ND
SB50	Aerobic bacteria	0.95±0.07c	1.14±0.24c	1.81±0.30c	1.88±0.18e
	Coliform	ND	ND	ND	ND

WRT, W40 and W50, pre-drying (30 min) at room temperature, 40℃ and 50℃ after tap water washing; HBRT, HB40 and HB50, pre-drying (30 min) at room temperature, 40℃ and 50℃ after blanching (30 sec) on hot water (90±2℃); SBRT, SB40 and SB50, pre-drying (30 min) at room temperature, 40℃ and 50℃ after blanching (30 sec) on 2% NaCl solution (90±2℃), respectively.
Each value is expressed as mean±SD of multiple determinations (n=5).
Means with different letters within the same column are significantly different (p<.05).
Not detected within the detection limit<1 log CFU/g.