견과류의 지방산, 트리아실글리세롤, 토코페롤 및 파이토스테롤의 조성 연구
Studies on the Content of Triacylglycerol Species, Tocopherols, and Phytosterols from the Selected Nuts
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견과류 중 sunflower seed, cashew nut, walnut, pistachio, pumpkin seed, ginkgo, hazel nut, pecan을 원료로 하여 지방산 조성 분석 및 sn-2 position 분석, triacylglycerol species의 분석, tocopherol, phytosterol 함량을 분석하였다. 조지방 함량은 hazel nut에서 약 39.60 wt%로 가장 높았으며, walnut 35.25 wt%, pistachio 30.22 wt% 등의 순이었다. GC에 의한 sn-2 위치의 지방산 조성 분석 결과, oleic acid의 함량이 많은 견과류는 cashew nut, pistachio, hazel nut, pecan 이였으며, 특히 ginkgo의 경우 특이적으로 oleic acid의 이성체인 vaccenic acid가 10.72 wt% 나타냄을 확인할 수 있었다. 반면, linoleic acid 등이 높은 견과류는 sunflower seed, walnut, pumpkin seed 이었다. 견과류들의 TAG species의 PN값은 40∼52 사이에 존재하였다. Tocopherol의 함량은 ginkgo, sunflower seed, pumpkin seed 등에서 각각 48.57, 38.35, 31.43 ㎎/100 g 순으로 높은 함량을 나타내었다. 또한 총 phytosterol의 경우 88.60∼947.20 ㎎/100 g 사이에 함량을 나타내었다.
Abstract
Including crude fat content, triacylglycerol species, tocopherols and phytosterols were analyzed in 8 kinds of nuts (sunflower seed, cashew nut, walnut, pistachio, pumpkin seed, ginkgo, hazel nut and pecan). The extracted crude fats showed 0.63∼39.60 wt%, among which hazel nut showed the highest amount of fat content. Oleic acid (C18:1) was major fatty acids at sn-2 position in cashew nut, pistachio, hazel nut, and pecan while sunflower seed, walnut, and pumpkin seed showed linoleic acid (C18:2) as a major fatty acids at sn-2 position. Especially, ginkgo contained 10.72 wt% of vaccenic acid (C18:1-n7) at sn-2 position. The TAG species of 8 kinds of nuts were analyzed by reverse-phase HPLC, from which PN value ranged 40∼52. Among the analyzed nuts, higher content of tocopherols were observed in ginkgo (48.57 ㎎/100 g), sunflower seed (38.35 ㎎/100 g), and pumpkin seed(31.43 ㎎/100 g). Total phytosterols were observed with the range of 88.60∼947.20 ㎎/100 g.
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