조릿대 잎을 이용한 가공품 개발에 대한 기초자료로 활용하기 위하여 잎차의 영양성분 및 기능성을 평가하였다. 일반성분은 수분 5.68%, 조단백 16.38%, 조지방 4.68%, 가용성 무질소물 32.37%, 조섬유 32.36% 및 회분 8.53%로 각각 나타났다. 주요 무기성분으로는 K 2,133.83, Ca 1,144.09 및 P 543.00 mg/100 g이었으며, 아미노산중 proline이 1,275.26 mg/100 g으로 가장 높은 함량을 보였고, cystine이 71.49 mg/100 g으로 가장 낮은 함량을 보였다. 주요 지방산으로는 linoleic acid(50.52%), palmitic acid(18.52%) 및 oleic acid(14.16%)였으며, 관능검사 결과 $80^{circ}C$에서 추출한 조릿대 잎차가 가장 높은 기호도를 보였다. 80% 메탄올 및 열수추출물의 총 페놀과 플라보노이드 함량을 측정한 결과 15.09, 7.69 mg/g과 12.03$pm$0.67, 6.12$pm$0.29 mg/g으로 각각 나타났다. DPPH와 $ABTS^+$ 라디칼 소거활성을 측정한 결과 80% 메탄올추출물 농도 1.25 mg/mL에서 각각 86.87%와 83.85%의 소거활성을 보였으며, 환원력 및 acetylcholinesterase(퇴행성뇌신경질환의 일종인 치매 유발 효소) 저해활성은 농도 의존적인 경향을 나타내었다.
In this study, the nutritional components and functional activities of Sasa borealis leaf tea were evaluated. The proximate compositions were as follows; moisture 5.68%, crude protein 16.38%, crude fat 4.68%, nitrogen free extracts 32.37%, crude fiber 32.36%, and ash 8.53%, respectively. The mineral elements were as follows: K 2,133.83, Ca 1,144.09 and P 543.00 mg%, respectively. The amino acid contents of the Sasa borealis leaf tea were very rich in proline (1,275.26 mg/100 g) and deficient in cystine (71.49 mg/100 g). The major fatty acid components were linoleic acid (50.52%), palmitic acid (18.52%), and oleic acid (14.16%). Finally, based on our sensory evaluations, the $80^{circ}C$ extracted Sasa borealis leaf tea evidenced the best overall quality. The contents of total phenol and total flavonoids of the 80% methanol and hot water extracts were 15.09, 7.69 mg/g and 12.03, 6.12 mg/g, respectively. The DPPH and $ABTS^+$ radical scavenging activities of the 80% methanol extract from Sasa borealis leaf tea were 86.87% and 83.85% at a concentration of 1.25 mg/mL. The 80% methanol and hot water extracts evidenced reducing power and inhibitory effects against acetylcholinesterase in a dose-dependent manner.
