文獻(xiàn)檢索-英語(yǔ)-wenkub
2022-09-01 16:38:19 本頁(yè)面
【正文】 istry卷期：September 15, 2007 摘要：Seventeen phenolic pounds in 23 English apple ciders were identified and quantified by HPLCPDAMS2. The total phenolic content of the ciders varied greatly ranging from 44 to 1559 mg/L. Four groups of pounds were identified, flavan3ols, hydroxycinnamates, flavonols, and dihydrochalcones. Hydroxycinnamates were the predominant group of phenolics in the majority of the ciders. Procyanidins were analyzed by HPLC after thiolysis, and total procyanidin content ranged from 8 to 722 mg/L and an average degree of polymerization of –. This investigation of a wide range of ciders has shown a substantial variation in the profile and quantity of the phenolics. The analysis of single variety ciders highlighted the importance of using an apple cultivar with a high phenolic content to produce a phenolicrich cider. Adaptations to the cidermaking process could be used to increase the phenolic content with potential health benefits. 1. 篇名：大學(xué)英語(yǔ)教師績(jī)效評(píng)估研究College English Teachers Performance Evaluation Studies作者：張蔚磊；授予單位： 上海外國(guó)語(yǔ)大學(xué)【摘要】 本文的研究主要包括三大部分：第一部分,大學(xué)英語(yǔ)教師績(jī)效評(píng)估現(xiàn)狀研究,在這一部分里主要研究了大學(xué)英語(yǔ)教師績(jī)效的概念界定,大學(xué)英語(yǔ)教師績(jī)效的特殊性,高績(jī)效大學(xué)英語(yǔ)教師的特征,同時(shí)采用問(wèn)卷調(diào)查與
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