초록

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Abstract ▼ AI-Helper

Six different types of teas from box thorn leaves collected on mid May were prepared by using different tea making procedures. The selected physicochemical propentes and the sensory qualities of the 6 different teas were analyzed. The box thorn leaves contained 87.71% moisture, 0.69% crude fat, 4.77...

Six different types of teas from box thorn leaves collected on mid May were prepared by using different tea making procedures. The selected physicochemical propentes and the sensory qualities of the 6 different teas were analyzed. The box thorn leaves contained 87.71% moisture, 0.69% crude fat, 4.77% crude protein, 2.13% fibers, 3.11% carbohydrates and 1.59% ash. Based on the sensory analysis, roasted tea(duckum tea) had the highest values in taste, flavor, color and overall preference. Eighteen free amino acids were identified in the roasted tea, showing the specially high levels of proline(170.15mg%) and glutamic acid(112.34mg%). The roasted tea also contained glucose(1.07%), maltose(0.87%), sucrose(0.63%) and fructose(0.55%). The content of citric acid(337.43mg%) in the roasted tea was the highest, followed by malonic acid(54.17mg%), oxalic acid(48.66mg%), malic acid(27.41mg%), succinic acid(4.48mg%), fumaric acid(1.08mg%) and lactic acid(trace amount), in a decreasing order.