Earticle

초록

영어

Jiwhang (Rehmannia glutinosa), one of the most widely used medicinal herbs, was dried with various methods such as sun drying, hot air drying, vacuum drying, and freeze drying methods, and their effects on the antioxidant capacity in relation with the content of total phenolic compounds were studied with a steamed-and-dried rehmannia (sookjiwhang) for comparison. Generally, total phenolic contents decreased significantly by all of the drying treatments except the steamed-anddried rehmannia, in which total phenolic contents increased 2.4 fold compared with fresh rehmannia. Content of verbascoside, a functional phenolic compound, was the highest in the freeze-dried rehmannia (177.97±0.02 μg/g d.m.) followed by vacuumdried (105.55±0.07 μg/g d.m.), hot air-dried (23.01±0.02 μg/g d.m.), and sun-dried (4.89±0.13 μg/g d.m.) ones comparable to the fresh rehmannia (80.15±1.26 μg/g d.m.). Antioxidant capacity determined by both 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azinobis (3-ethyl-benzthiazoline-6-sulphonic acid) (ABTS) methods agreed with the result of total phenolic contents, that is, the antioxidant capacity was the highest in the steamed-and-dried rehmannia followed by fresh rehmannia, vacuumdried, hot air-dried, sun-dried, and freeze-dried ones. Conclusively, the total phenolic contents and antioxidant capacity of rehmannia were greatly affected by the drying methods used.

목차

Abstract
 Introduction
 Materials and Methods
 Results and Discussion
 References

키워드

저자

• Jong-Whan Rhim [ Department of Food Engineering, Mokpo National University ] Corresponding author
• Yang Xi [ Department of Food Engineering, Mokpo National University ]
• Won-Chul Jeong [ Department of Food Engineering, Mokpo National University ]
• Kyung-Sik Ham [ Department of Food Engineering, Mokpo National University ]
• Ha-Sook Chung [ Department of Food and Nutrition, Duksung Women’s University ]
• Eun-Sil Kim [ Department of Food and Nutrition, Duksung Women’s University ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  Food Science and Biotechnology

• 간기

  격월간

• pISSN

  1226-7708

• 수록기간

  1992~2009

• 십진분류

  KDC 574 DDC 664