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KMID : 0380620150470020254
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Korean Journal of Food Science and Technology
2015 Volume.47 No. 2 p.254 ~ p.260
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Effect of Extraction Solvent on the Physiological Properties of Korean Pear Peel (Pyrus pyrifolia cv. Niitaka)
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Park Ji-Su
Han In-Hwa
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Abstract
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The effect of the extraction solvent on the physiological properties of the peel of the Korean pear (Pyrus pyrifolia cv. Niitaka) was evaluated. The total phenol content was highest in the 80%(wt) methanol extract, whereas flavonoid content was highest in the 80% ethanol extract. The antioxidant activities of the extracts were evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging abilities, and their reducing power. The water and 80% methanol extracts of the pear peel had highest DPPH and ABTS· radical scavenging activities, and reducing power, respectively. The inhibition of α-glucosidase was highest in the 80% methanol extract, and alcohol dehydrogenase activity was highest in the water extract. All three extracts had similar antimicrobial activity. Because water, 80% ethanol, and 80% methanol extracts exhibited high activities in different assays of physiological properties, each solvent could be used for specific purposes.
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KEYWORD
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pear peel, phenol compounds, antioxidant activity, α-glucosidase, alcohol dehydrogenase
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