Change in Sterol Compositions of Sesame Seed during Storage

저장중 참깨의 스테롤 조성변화

The major sterol in the unsaponifiable matter (15.9 mg per gram on basis) of the sesame oil was 4-desmethylsterol (55.6%). 4-desmethylsterol consists of sitosterol (29.5%), campesterol (9.8%), ${\Delta}^5$-avenasterol (6.6%) and stigmasterol (5.9%). Between the packing bags kept the sesame seeds in, namly, the cotton and polyethylene bag, the campesterol content of sesame stored in the cotton bag was not nearly changed, whereas stored in the polyethylene bag was increased upto 4 months storage and then decreased until 15 months. The sitosterol content of sesame stored in cotton bag was increased upto 4 months and then decreased sharply until 15 months of storage, whereas stored in the polyethlene bag was not changed upto 4 months and slightly increased upto 9 months and again decreased until 15 months. Between the storage conditions, namly, light and dark storage, the stigmasterol content of the sesame stored under light condition was hardly changed upto 9 months and slightly increased after that, whereas stored under dark condition was increased upto 4 months, decreased upto 9 months and again slightly increased after that. ${\Delta}^5$-avenasterol was not much changed in all the storage conditions.

유리스테롤은 참깨종자유 1g당 $2.33{\sim}3.87mg$으로서 총스테롤의 $36.5{\sim}52.2%$이며 결합스테롤은 $3.47{\sim}4.06mg$이었다. 참깨종자유중 불검화물은 15.9mg/g이며 이중 4-데스매틸스테롤이 55.6%로 가장많고 4-데스메틸스테롤의 조성은 시토스테롤이 29.5%로 가장많고 캄페스테롤이 9.8%, $\Delta^5$-아베나스테롤은 6.6%, 스티그마스테롤은 5.9%이었다. 저장중 스테롤의 변화는 캄페스테롤은 포리에틸렌포대저장에서 4개월까지는 증가하다가 그 이후는 감소하였고, 스티그마스테롤은 암소저장에서 4개월까지는 증가하다가 그 이후는 다시 약간 증가하였다. 또한 시토스테롤의 변화는 무명포대저장의 경우 4개월까지는 증가하다가 그 이후는 급격하게 감소하였으나 포리세틸렌포대의 경우 4개월까지는 거의 변화가 없고 그 이후 9개월까지는 약간 증가하다가 다시 감소 하였다. 그러나 ${\Delta}^5$-아베나스테롤은 변화가 거의 없었다.