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KMID : 0665220140270061051
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Korean Journal of Food and Nutrition
2014 Volume.27 No. 6 p.1051 ~ p.1058
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The Change of Free Sugar, Hesperidine, Naringin, Flavonoid Contents and Antihypertensive Activities of Yuza Variety according to Harvest Date
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Hwang Seong-Hee
Jang Jae-Seon
Kim Min-Jeong
Kim Kang-Sung
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Abstract
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Yuza (Citrus junos) had 3 varieties and they had variable physiochemical properties. This study analyzed free sugar, hesperidine, naringin, flavonoid contents and antihypertensive activities according to variety and harvest time of Yuza. Three Yuza varieties, native (C. junos I), improved I (C. junos I + Poncirus trifoliata), improved II (C. junos I + C. junos II) were used. Harvest time could influence biochemical properties of Yuza such as acidity and ˚brix. When the Yuza harvested at behind of season, the sugar/acid ratio went up because the acidity was decreased but sugar content was increased. Fructose content was dramatically high at November, Yuza of the season. Total flavonoids was high in pulp parts of improved II and in juice of native one harvested at October. The content of hesperidin and naringin in peels and juices were high in immature fruits fresh-picked at July since then they were decreased steadily and there were no difference according to varieties. The angiotensin converting enzyme (ACE) inhibition was powerful at pulp of Yuza in particular native one picked at November.
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KEYWORD
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Yuza, harvesting date, free sugar, hesperidine, naringin, flavonoid contents, antihypertensive activities
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