Table 3. Changes in color values of broccoli after chlorine dioxide and ultrasound treatment

	L	a	b	Yellowing index
TW	47.15±3.44¹⁾^a²⁾	-15.48±1.48^a	23.96±3.33^a	72.17±5.62^a
US+TW	45.07±1.95^a	-16.17±1.18^a	22.83±1.35^a	72.62±4.02^a
ClO₂	46.22±2.36^a	-15.79±0.98^a	23.14±2.25^a	71.38±3.83^a
US+ClO₂	44.13±3.92^a	-14.26±1.77^a	22.05±3.54^a	71.05±6.20^a

¹⁾Mean±SD values from 5 times separated experiments are shown.
²⁾Means within a column followed by the same letters are not significantly different based on Duncan's multiple range (p<0.05).