碩士 / 南華大學 / 自然醫學研究所 / 93 / The sound quality is affected not only by the voicing technique, but also by various repriatory tract diseases, which may be related to oxidation. This study is to investigate the antioxidant compositions and their antioxidant ability of several herbs, including Lopatherum gracile, Eriobotrya japonica, Ophiopogon japonicus, Sterculia scaphigera, and the mixture of those above four herbs, which are clinically positively reported. The contents of phenol compounds and flavonoids and the antioxidant ability, including scavenging capacity of DPPH and reducing power, were assessed. The contents of phenol compounds and flavonoids of Lopatherum gracile, Eriobotrya japonica, Ophiopogon japonicus, Sterculia scaphigera, and mixture were 50.94, 23.44, 23.10, 19.11, 10.38 mg gallic acid/g dw and 8.45, 15.72, 7.70, 5.52, and 0.76 mg quercetin/g dw, respectively. The effects of scavenging on DPPH at 1g/l were Lopatherum gracile (94%), Eriobotrya japonica (84%), Ophiopogon japonicus (79%), mixture (72%), and Sterculia scaphigera (63%). At the concentration of 1 g/l, Eriobotrya japonica exhibited the strongest reducing power, followed by mixture, Lopatherum gracile, Ophiopogon japonicus, and then Sterculia scaphigera. Regression analysis indicated that high phenol and flavinoid contents in those herbs were significantly correlated to scavenging effects on DPPH and reducing power (P < 0.01); thus, drinking above herb teas may benefit antioxidant activity and further improve sound quality.
| Identifer | oai:union.ndltd.org:TW/093NHU05067006 |
| Date | January 2005 |
| Creators | Mann-ching Yeh, 葉曼青 |
| Contributors | Zre-ran Yu, 余哲仁 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 67 |
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