The effects of two different drying methods,namely hot-air drying and freeze drying,on the phenolic profiles,antioxidant and hypoglycemic activities of pulp extracts from two main Chinese bayberry cultivars('Biqi'or'BQ'and'Dongkui'or'DK')were evaluated.The results showed that'BQ'bayberry provided higher total phenolic(TPC),total flavonoid(TFC)and total anthocyanin(TAC)contents than'DK'bayberry after the same drying method,while its antioxidant and hypoglycemic activities were highly affected by drying method.Freeze-dried samples possessed significantly higher TPC,TFC and TAC,and exhibited more potent antioxidant and hypoglycemic activities than hot-air dried ones(P＜0.05).Freeze-dried'DK'bayberry exhibited similar antioxidant activities and a-amylase inhibitory activity,but higher α-glucosidase inhibition than freeze-dried'BQ'bayberry(P＜0.05).Compared with hot-air dried samples,freeze-dried samples had significantly higher contents of cyanidin-3-O-glucoside,myricitin-3-O-rhamnoside,quercetin-3-O-galactoside,quercetin-3-O-glucoside and quercetin-3-O-rhamnoside,which had been proved to be the main contributors to the in vitro hypoglycemic activities of bayberry pulp extract.All these results demonstrate that freeze drying is more suitable for the preservation of phenolic components in the pulp extract of Chinese bayberry,and the pulp extract of freeze-dried'DK'could be applied as a potential hypoglycemic food additive.

Zhe Liu;Jiagan Zhang;Shengmin Lu;Weimin Tang;Yibin Zhou;Siew Young Quek

Institute of Food Science,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China;School of Tea and Food Technology,Anhui Agricultural University,Hefei 230036,China;Food Science,School of Chemical Sciences,The University of Auckland,Auckland 1010,New Zealand;Riddet Institute,Centre of Research Excellence for Food Research,Palmerston North 4474,New Zealand

食品科学与人类健康（英文）

[1]Zhe Liu;Jiagan Zhang;Shengmin Lu;Weimin Tang;Yibin Zhou;Siew Young Quek-.Effects of different drying methods on phenolic components and in vitro hypoglycemic activities of pulp extracts from two Chinese bayberry(Myrica rubra Sieb.et Zucc.)cultivars)[J].食品科学与人类健康（英文）,2022(02):366-373

bayberry,Biqi,Dongkui,myricitin,rhamnoside,galactoside

Effects,different,drying,methods,phenolic,components,vitro,hypoglycemic,activities,pulp,extracts,from,two,Chinese,Myrica,rubra,Sieb,Zucc,cultivars,effects,namely,hot,air,freeze,profiles,antioxidant,main,BQ,DK,were,evaluated,results,showed,that,provided,higher,total,TPC,flavonoid,TFC,anthocyanin,TAC,contents,than,after,same,while,its,highly,affected,by,Freeze,dried,samples,possessed,significantly,exhibited,more,ones,similar,amylase,inhibitory,activity,glucosidase,inhibition,Compared,had,cyanidin,glucoside,quercetin,which,been,proved,contributors,All,these,demonstrate,is,suitable,preservation,could,applied,potential,food,additive

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