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자료유형
학술저널
저자정보
저널정보
한국차학회 한국차학회지 한국차학회지 제21권
발행연도
2015.1
수록면
189 - 197 (9page)

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The relationships among the concentrations of chemical compositions, scores of sensory quality and price were studied based on 112 jasmine tea samples. Linear correlation analysis showed that 5 quality attributes (appearance, liquor color, aroma, taste and infused leaves) were positively correlated with each other and to the sum. 5 quality attributes and total quality score were logarithm relevant to price with the coefficients of determination R2 were 0.855, 0.667, 0.836, 0.900, 0.906 and 0.914. The six taste attributes could be grossly divided into two groups. Tenderness, sweetness, freshness and mellowness were grouped showing positive correlation with taste score, total quality score and price, while heaviness and thickness were grouped for opposite correlation. There were positive correlation within the same group and negative correlation between two different groups. The concentrations of polyphenols, amino acid, water extract, gallocatechin (GC), epigallocatechin (EGC), catechin (C), epicatechin (EC), epigallocatechin gallate (EGCG), gallocatechin gallate (GCG) and epicatechin gallate (ECG) in tea infusions were negatively correlated with tenderness, sweetness, freshness, mellowness, taste score, total quality score and price but positively correlated with heaviness and thickness (except some individual components), while gallic acid (GA) was the opposite. Multiple linear regression equations of taste score and total quality score were established. The back substitution was of high correlation between predicted and actual value and acceptance rate was over 90%.

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