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- W2388973722 abstract "The process of extracting polyphenols from Acacica mangium leaves by microwave pretreatment was studied systematically.The dried leaves were used as the crude drug,the effect of the operation parameters during the extraction on the extraction result was analyzed with monofactor experiment and the optimum extraction process was optimized with orthogonal test.Experiments were made by using L9(34) orthogonal design with extractive yield of total polyphenols as the index,investigating the influence of ethanol concentration,the ratio of solid to liquid,microwave pretreatment time.Results showed that optimum extraction conditions were determined as follows:microwave pretreatment ethanol concentration 50%,the ratio of solid to liquid 1 ∶2(g/mL,mass:volume),microwave pretreatment time 30 s,extreating temperature 70 ℃,time 30 min,70% EtOH as extracting solvent,natural pH value(pH=6.38),stock ratio 1 ∶7.The extractive yield of total polyphenols from Acacica mangium leaves was 18.013 mg/g and IC50 of scavenging DPPH free radicals of total polyphenols was 39.126 at the optimum parameters." @default.
- W2388973722 created "2016-06-24" @default.
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- W2388973722 date "2008-01-01" @default.
- W2388973722 modified "2023-09-24" @default.
- W2388973722 title "Study on extraction of total polyphenols from Acacica mangium leaves by microwave pretreatment" @default.
- W2388973722 hasPublicationYear "2008" @default.
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