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熱處理對(duì)輕度加工竹筍品質(zhì)和生理的影響
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    摘要:

    研究了20℃常溫水和40、45、50℃熱水處理5min對(duì)輕度加工竹筍在10℃貯藏期間品質(zhì)和生理的影響。結(jié)果表明:未經(jīng)熱處理的,呼吸強(qiáng)度和乙烯釋放量逐漸降低;苯丙氨酸解氨酶(PAL)、多酚氧化酶(PPO)和過氧化物酶(POD)活性迅速增加;促進(jìn)總酚的積累;導(dǎo)致色澤值減小,褐變指數(shù)增大。40℃或45℃熱水處理5min不僅降低了輕度加工竹筍呼吸強(qiáng)度和乙烯釋放量,而且抑制了PAL、PPO和POD的活性,從而保持較高的色澤值和較低褐變指數(shù)水平;但50℃熱水處理5min會(huì)產(chǎn)生熱傷害,對(duì)輕度加工竹筍的貯藏反而不利。

    Abstract:

    To explore the effectiveness of heat treatment on quality maintenance of bamboo shoot (Phyllostachys vivax McClure.cv.Huapuji), lightly processed bamboo shoots were dipped in water at either 20℃, 40℃, 45℃ or 50℃ for 5 min before stored at 10℃ for 6 days. The experimental results indicated that the respiration rate and ethylene production were decreased, while the activities of phenylalanine ammonia lyase (PAL), polyphenol oxidase (PPO) and peroxidase (POD) increased quickly, and it led to accumulation of total phenolic compounds, thereby promoting L decrease and browning index (BI) increase. Heat treatments at 40℃ or 45℃ for 5min reduced the respiratory rate and ethylene production, inhibited the activities of PAL, PPO and POD, and maintained higher level of L and lower level of BI. Therefore, these two temperature treatments have potential use in lightly processed bamboo shoots storage. However, the treatment at 50℃ for 5min, had no beneficial effects on maintaining quality in lightly processed bamboo shoots because of the heat injury.

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羅自生,徐曉玲,嚴(yán)碧芳.熱處理對(duì)輕度加工竹筍品質(zhì)和生理的影響[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2008,39(1):64-67.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(1):64-67.

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