Table 3. Changes in coliform of sliced lettuce washed with various washing conditions
(Unit : log CFU/g)

Treatment¹⁾		Coliform
NT		2.8±0.4²⁾^b³⁾
Tap		3.3±0.2^b
MB		3.3±0.1^b
HWT	40°C	3.0±0.2^b
	45°C	3.9±0.0^c
	50°C	1.5±0.0^a
HWT+MB	40°C	3.0±0.2^b
	45°C	3.2±0.2^b
	50°C	3.8±0.1^c

NT, not treatment; Tap, tap water; MB, microbubble water; HWT, hot water; HWT+MB, microbubble and hot water; Washing time = 1 min.
Value are mean±SD (n=3).
Means with different letters are significantly different (p<0.05) by Duncan’s multiple range test.