This study was carried out to investigate the effects of supercritical carbon dioxide (SC-CO2) extracts from sweet potatoes (SP) and watermelon (WM) on the oxidative stability of perilla seed oils (POs) over the existing ones. A comparison was done between the oxidative stability of perilla oil (PO) after the addition of 0.1% of SP, and WM extracts and PO without extract. The oxidative stability was measured based on the viscosity, acid value (AV), peroxide value (POV), antioxidant (DPPH) activity, p-anisidine value (p-AV), and fatty acid composition. The viscosities ranges were: PO without extract, from 53.99±0.99 to 74.38±1.61 cps, PO with SP extract, from 53.99±0.10 to 58.73±0.8 cps, and PO with WM extract, from 53.98±0.10 to 56.00±0.70 cps. While the PO containing the SC-CO2 extracts had significantly lower AV, POV, and p-AV, their antioxidant activity was approximately 10 times higher than that of the PO without extract. There were no significant differences in fatty acid composition between SC-CO2 extracts added groups and PO without extract (p<0.05). The findings of this study confirmed that the SC-CO2 extracts from sweet potatoes and watermelon enhanced the oxidative stability of perilla seed oils, and are potential natural antioxidants for use in the food industry.
들기름 및 미강유를 베이스로 개발한 혼합 식용유는 오메가-3 지방산인 리놀렌산 함량이 약 20% 정도로 매우 높다. 이는 기존의 일반 식용유 중 오메가-3 지방 함량이 매우 높은 콩기름과 카놀라유의 리놀렌산 함량이 각각 6% 및 10% 내외인 점을 감안하면, 이들 식용유에 비하여 새로 들기름과 미강유를 혼합한 식용유는 2~3배 높은 비율로 오메가-3 지방산을 제공할 수 있어서, 오메가-3 지방산 섭취가 부족한 현대인의 식단에서 중요한 오메가-3 지방산 급원으로서의 역할을 할 수 있을 것이다. 뿐만 아니라, 토코페롤 함량도 약 46.77 ㎎/ 100 g oil 정도인데, 가장 주목할 일은 토코페롤 동족류 중 비타민 E의 활성이 가장 강한 알파-토코페롤(31.71 ㎎/100 g oil)이 가장 많이 존재하여, 총 토코페롤의 64%를 차지하고 있어서 비타민 E로서의 기능이 높다. 혈중 콜레스테롤 함량을 낮추는 기능성이 알려진 파이토스테롤 함량이 들기름과 미강유를 혼합한 식용유에 약 7,200 ppm 함유되어 있어, 일반적인 식용유의 3,000 ppm의 약 2.3배에 달한다. 본 연구에서 개발한 들기름과 미강유를 혼합한 식용유는 일반적인 식용유인 콩기름과 거의 유사한 산화안정성을 갖는 것으로 확인되어, 일반 들기름에 비하여 현저히 높은 산화안정성이 확보되었다.
A total of 162 accessions of Perilla germplasm collected from diverse habitats in South Korea. The oil content of the seeds varied from 19.8 to 49.6%, the average being 33.3%. Oil content showed wide ranges of variation. The fatty acid composition of the seed oil showed the following overall ranges: palmitic 4.5 to 8.1%, stearic 1.6 to 7.4%, oleic 13.4 to 23.6%, linoleic 9.5 to 19.5%, and linolenic acid 48.6 to 66.4%. No correlation was found between oil content and fatty acid composition. The results obtained in this study provide useful background information for developing new cultivars with a high oil content and different fatty acid. Several accessions could be used as parental lines in breeding programs aiming to increase perilla oil quantity and quality.
냉압착 들기름과 볶음 압착 들기름 및 볶음 가열 압착 들기름의 가열산화에 의한 색도 및 갈변도, 총 페놀 함량, 과산화물가, 산가, 이중공액산가, 전자공여능 및 지방산 함량 변화를 측정하여 각 들기름의 특성 및 가열산화에 의한 품질을 비교하였다. 냉압착 들기름은 Hunter L 값은 76.62로서 볶음 압착 들기름의 39.77에 비하여 2배 이상 높게 나타났으며, 갈색도의 경우에도 각각 0.027과 0.244을 나타내어 냉압착유의 갈색화 정도가
“Daeyou” was developed at the National Crop Experiment Station, RDA in 2001 through the crossing lines of high oil content Yeupsildlkkae and Heukim's hybrid line and it was combined by Pakesa and low seedcoat ratio variety Suwon 8 in 1991. Daeyou has grey
The new perilla variety Daesildeulkkae was developed at the National Crop Experiment Station, RDA in 1999 through the crossing between recommended varieties of Daeyeupdlkkae and Yeupsildlkkae in 1991. "Daesildeulkkae" is characterized as a thinner seedcoa