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热处理对轻度加工竹笋品质和生理的影响

, PP. 64-67

Keywords: 竹笋,轻度加工,热处理,品质

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Abstract:

研究了20℃常温水和40、45、50℃热水处理5min对轻度加工竹笋在10℃贮藏期间品质和生理的影响。结果表明:未经热处理的,呼吸强度和乙烯释放量逐渐降低;苯丙氨酸解氨酶(PAL)、多酚氧化酶(PPO)和过氧化物酶(POD)活性迅速增加;促进总酚的积累;导致色泽值减小,褐变指数增大。40℃或45℃热水处理5min不仅降低了轻度加工竹笋呼吸强度和乙烯释放量,而且抑制了PAL、PPO和POD的活性,从而保持较高的色泽值和较低褐变指数水平;但50℃热水处理5min会产生热伤害,对轻度加工竹笋的贮藏反而不利。

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