Antioxidant Activity, Total Phenolic and Tannin Contents in Crotalatia Juncea Tea

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ขนิษฐา พันชูกลาง
ฤทัยวรรณ บุญครองชีพ
วนิดา เพ็ชร์ลมุล
อภิชาติ พันชูกลาง


Crotalatia Juncea L. (Sunn hemp) is a leguminous cover crop with multipurpose use as green manure, animal fodder crop, and plants in scenic spots for tourism. Additionally, Sunn hemp could also be used in human foods with its pharmacological effect. This research aimed to study the effect of pan-roasting time and air-drying temperature on physicochemical properties, antioxidant activity, total phenolic and tannin contents of Sunn hemp tea products. The samples of young leaves (50-60 days), and flowers (50-60 days) were pan-roasted at 60 ºC for 10 and 15 min and air-dried at 80 and 90 ºC for 3 hrs. The results showed that the moisture content of Sunn hemp leaves and flowers were significantly decreased (p ≤ 0.05) with increasing both roasting time and drying temperature. The moisture contents of the leaves and flowers were 4.45-7.62 and 5.59-7.73 %, respectively. The L* values of Sunn hemp tea powder and beverage were significantly decreased (p ≤ 0.05) while a* values were significantly increased (p ≤ 0.05) with increasing the roasting time and drying temperature. The results demonstrated that the total phenolic and tannin contents and antioxidant activity of tea beverage from both parts of Sunn hemp were significantly increased (p ≤ 0.05) with increasing the roasting time and drying temperature. Moreover, the total phenolic and tannin contents and antioxidant activity of tea beverage from young leaves were significantly higher (p ≤ 0.05) than those of tea beverage from flowers. The antioxidant activity of tea beverage from Sunn hemp flowers and young leaves were shown in the range of 49.40-56.39, and 58.53-72.41 mg Trolox/100 mL sample, respectively.


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ขนิษฐา พันชูกลาง

สาขาวิชาวิทยาศาสตร์และเทคโนโลยีการอาหาร คณะเทคโนโลยีการเกษตร มหาวิทยาลัยราชภัฏสงขลา ตำบลเขารูปช้าง อำเภอเมือง จังหวัดสงขลา 90000

ฤทัยวรรณ บุญครองชีพ

วิทยาลัยนวัตกรรมและการจัดการ มหาวิทยาลัยราชภัฏสงขลา ตำบลเขารูปช้าง อำเภอเมือง จังหวัดสงขลา 90000

วนิดา เพ็ชร์ลมุล

วิทยาลัยนวัตกรรมและการจัดการ มหาวิทยาลัยราชภัฏสงขลา ตำบลเขารูปช้าง อำเภอเมือง จังหวัดสงขลา 90000

อภิชาติ พันชูกลาง

สาขาวิชาเกษตรศาสตร์ คณะเทคโนโลยีการเกษตร มหาวิทยาลัยราชภัฏสงขลา ตำบลเขารูปช้าง อำเภอเมือง จังหวัดสงขลา 90000


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