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http://dx.doi.org/10.9799/ksfan.2022.35.1.062

Physicochemical Characteristics and Antioxidant Activities of Omija (Schizandra chinensis Baillon) Seed Oil Extracted at Different Temperatures and Moisture Contents  

Park, Ye Gun (Dept. of Food Science and Technology, Kongju National University)
Park, So Yeon (Dept. of Food Science and Technology, Kongju National University)
Park, Youn-Je (Dept. of Food Science and Technology, Kongju National University)
Publication Information
The Korean Journal of Food And Nutrition / v.35, no.1, 2022 , pp. 62-73 More about this Journal
Abstract
Omija seed oil was extracted from Omija seeds, a by-product of Omija, using an eco-friendly pressed extraction method. Physicochemical properties and antioxidant activities of 12 extracts using different combinations of seed moisture content (5, 7.5, and 10%) and extraction temperature (25, 49, 75, and 100℃) were then investigated. The highest extraction yield was 31.33% at moisture of 5% and temperature of 75℃. The lowest acid value was 4.18±0.25 at moisture of 5% and temperature of 49℃or moisture of 7.5% and temperature of 25℃. Peroxide value, iodine value, and saponification value were the lowest at 0.64±0.56 meq/kg, 159.38± 6.03, and 57.60±9.40, respectively, at moisture of 5% and temperature of 25℃. The content of total polyphenolics was the highest at 4,413±125 mg TAE/100 g when the moisture content was 10% and the extraction temperature was 25℃. DPPH radical scavenging activities of oil extracts at 20~100 mg/mL were 28.68±7.30~87.65±2.20%. The maximum antioxidant activity and IC50 were 87.65±2.20% and <20 mg/mL, respectively, for extract obtained at moisture of 10% and temperature at 100℃. As a result, the extraction yield, acid value, peroxide value, iodine value, saponification value, and so on were excellent at moisture content of 5% and extraction temperature of 25℃ or 49℃. However, the content of total polyphenolic compounds and antioxidant activity were the highest at moisture of 10% and extraction temperature of 100℃. In conclusion, extracting Omija seed oil from Omija seeds, a by-product of Omija, is effective with a pressed extraction method.
Keywords
Omija seed; extraction temperature; moisture contents; physicochemical characteristics; antioxidant activity;
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