Table 5.
The effect on drip loss (%w/w) of butterbur stems by freezing and thawing methods

Treatment		Freezing treatment	Thawing treatment	Drip loss (%w/w)
Raw	Unpeeled	-40°C	25°C	65.50
	Peeled	-40°C	25°C	80.00
Blanched		-20°C	4°C	58.48
			25°C	61.29
			Running water	63.00
			Microwave	64.04
		-40°C	4°C	60.52
			25°C	60.88
			Running water	59.33
			Microwave	60.26
		Immersion (-50°C)	4°C	10.12
			25°C	15.37
			Running water	16.12
			Microwave	12.04