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KMID : 0380620110430060719
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Korean Journal of Food Science and Technology
2011 Volume.43 No. 6 p.719 ~ p.722
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Physicochemical Properties of Shade-cultivated Powdered Green Teas
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Lee Lan-Sook
Park Jong-Dae
Cha Hwan-Soo
Kim Jong-Tae
Kim Sang-Hee
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Abstract
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The Daecha-12 and Yabukita varieties of powdered green teas were grown under 85% shade-cultivated condition, and their physicochemical properties were analyzed. Total catechin content was not significantly different but, non-gallated catechin content in Daecha-12 was significantly higher than that in Yabukita. Theanine (32%), caffeine (14%), lutein (15%) and total chlorophyll (28%) levels were significantly higher in Daecha-12 than those in Yabukita. The results of a color analysis showed that the lightness L-value of Yabukita was higher than that of Daecha-12 but, that the greenness negative a-value and b-values of Daecha-12 were higher than those of Yabukita. The Daecha-12 cultivar had lower catechin content but higher content of theanine, caffeine, theobromine, lutein, chlorophyll, and a negative a-value than those of the Yabukita cultivar. Thus, the Daecha-12 cultivar is suitable to prepare a high-quality powdered green tea product.
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KEYWORD
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powdered green tea, cultivar, Daecha-12, Yabukita
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