Purpose: The purpose of this study was to investigate the quality characteristics and functionality of Lotus root tea (LT) added with Gardenia jasminoides powder (GP) and Rubi fructus powder (RP). Methods: 0.35 kg of GP and RP per 15 kg of Lotus root were added in LT, then proximate compositions, physicochemical properties, functional analysis, anti-oxidative effect, ACE (angiotensin I-converting enzyme inhibitory effects), α-glucosidase inhibitory effects, sensory evaluations of the Lotus root tea were measured. Results: GP sample showed higher content of crude protein, Na, Mg, K, Ca and showed higher value of L, a, b compared to RP(p<0.001). RP sample showed higher content of moisture(p<0.001), crude lipid(p<0.05), crude ash(p<0.01), Fe(p<0.001) and pH value(p<0.001) compared to GP. Also, total polyphenol contents(p<0.01), total flavonoid contents(p<0.01) as well as DPPH and ABTS free radical inhibition effects were higher than GP(p<0.001). Additionally, ACE and α-Glucosidase inhibitory effects were higher than GP(p<0.001). Proximate composition results of powder of Rotus root tea (LP), Lotus root tea added with Gardenia jasminoides (GLP), Lotus root tea added with rubi fructus powder (RLP) were content of crude protein and value of L on LP, GLP, RLP showed that GLP > RLP > LP was significant(p<0.001). content of crude lipid(p<0.01), pH value(p<0.001), and value of b(p<0.001) on LP, GLP, RLP showed that GLP > LP > RLP was significan but content of crude ash and Na on LP, GLP, RLP showed not significant. content of moisture(p<0.001), K(p<0.01), Ca(p<0.001), total polyphenol (p<0.01) and total flavonoid(p<0.001) on LP, GLP, RLP showed LP and GLP, RLP was significant. Also, content of Mg(p<0.01), Water-soluble solid(p<0.001) and value of a(p<0.001) on LP, GLP, RLP showed GLP and LP, RLP was significant. The content of Fe, ABTS free radical inhibition and ACE effects on LP, GLP, RLP showed that LP had highest(p<0.001) but DPPH free radical inhibition and α-Glucosidase inhibitory effects on LP, GLP, RLP showed that RLP had highest(p<0.001). Results of Lotus root tea (LT), Lotus root tea added with Gardenia jasminoides powder (GLT), Lotus root tea added with Rubi fructus powder (RLT) were value of L on LT, GLT, RLT showed LT and GLT, RLT was significant(p<0.001), value of a on LT, GLT, RLT showed RLT > LT > GLT was significant(p<0.001), value of b on LT, GLT, RLT showed GLT and LT, RLT was significant(p<0.001). pH value on LT, GLT, RLT showed GLT > LT > RLT was significant(p<0.001). Result of sensory evaluation were sourness on home maker(2min) showed not significant but flavor(p<0.05), aftertaste(p<0.05), feeling of throat(p<0.05), delicate taste(p<0.05), color(p<0.01) showed significant. Additionally overall preference showed LT 7.65 > GLT 7.25 > RLT 6.70 was significant(p<0.01). color, delicate taste of sensory evaluation on student(2min) showed not significant but flavor(p<0.05), sourness(p<0.05), aftertaste(p<0.01) showed significant. also overall preference showed LT 6.90 > GLT 5.55 > RLT 5.45 was significant(p<0.05). aftertaste, sourness of sensory evaluation on home maker(3min) showed not significant but flavor(p<0.05), feeling of throat(p<0.05), delicate taste(p<0.01), color(p<0.01) showed significant. Additionally overall preference showed LT 8.05 > RLT 7.40 > GLT 7.05 was significant(p<0.01). Finally, flavor, delicat taste, aftertaste, sourness and feeling of throat of sensory evaluation on student(3min) showed not significant but color showed significant(p<0.05). also overall preference showed LT 6.80 > RLT 5.45 > GLT 5.20 was significant(p<0.05). Conclusion: Form the findings, this study suggest that lotus root tea added with Rubi fructus powder in the aspects of the consumer acceptability and functionality but suggest that lotus root tea added with Gardenia jasminoides powder in the aspects of the color of the tea.
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Ⅰ. 서론 1Ⅱ. 이론적 배경 41. 연근 41.1 연근의 역사 및 생산현황 41.2 연근의 성분과 효능 72. 치자의 성분과 효능 93. 복분자의 성분과 효능 114. 차 134.1 차의 역사 및 시장현황 134.2 차의 종류와 효능 15Ⅲ. 실험재료 및 방법 161. 실험재료 162. 치자와 복분자 분말을 이용한 연근차의 제조 163. 실험방법 203.1 일반성분 분석 203.2 이화학적 특성 분석 203.2.1 pH 측정 203.2.2 색도 측정 213.2.3 갈색도 측정 213.2.4 수용성 고형분 측정 213.2.5 무기질 함량 223.3 기능성 평가 분석 253.3.1 항산화 평가 253.3.2 항당뇨 효소활성 검증 273.3.3 항고혈압 효소활성 검증 273.4 관능평가 283.4.1 패널 선정 283.4.2 시료 준비 및 제시 283.4.3 평가 내용 및 절차 283.5 통계분석 29Ⅳ. 연구결과 및 고찰 301. 치자분말과 복분자 분말의 분석 결과 301.1 일반성분 분석 301.2 색도 측정 321.3 무기질 함량 분석 342. 치자연근차 분말과 복분자연근차 분말의 분석 결과 362.1 일반성분 분석 362.2 색도 측정 382.3 무기질 함량 분석 403. 치자연근차와 복분자연근차의 분석 결과 423.1 pH 측정 423.2 갈색도 및 색도 측정 433.3 수용성 고형분 측정 454. 치자분말, 복분자분말, 치자연근차, 복분자연근차 추출액의 기능성 평가 464.1 항산화 평가 464.2 항당뇨 효소활성 검증 534.3 항고혈압 효소활성 검증 575. 치자연근차와 복분자연근차의 침지 시간, 연령 별 관능 평가 615.1 2분 침지 관능 평가 615.2 3분 침지 관능 평가 64Ⅴ. 요약 및 결론 67참고문헌 72Appendix 76