Newly formed phenolics selectively bound to the graded polysaccharides of lychee pulp during heat pump drying using UPLC-ESI-QqQ-TOF-MS/MS
文献类型： 外文期刊
作者： Liu, Hesheng 1 ; Shu, Bin 2 ; Zhang, Ruifen 4 ; Dong, Lihong 4 ; Zhang, Jie 1 ; Shen, Yinbing 5 ; Wu, Guangxu 3 ; Su, Dongxiao 1 ;
作者机构： 1.Zhejiang Wanli Univ, Coll Biol & Environm Sci, Ningbo 315100, Peoples R China
2.Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou 510006, Peoples R China
3.Yangtze Univ, Coll Life Sci, Jingzhou 434025, Peoples R China
4.Guangdong Acad Agr Sci, Sericultural & Agrifood Res Inst, Key Lab Funct Foods, Guangdong Key Lab Agr Prod Proc,Minist Agr & Rural, Guangzhou 510610, Peoples R China
5.Guangzhou Univ, Sch Life Sci, Guangzhou 510006, Peoples R China
关键词： Bound phenolic; Polysaccharide; Selective binding
期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.2； 五年影响因子：7.8 ）
ISSN： 0141-8130
年卷期： 2023 年 250 卷
页码：
收录情况： SCI
摘要： Our study investigated heat pump drying (HPD) effects on phenolic-polysaccharide adducts of three lychee pulp grades, their composition and bound phenolic contents. During HPD, the hexose content in water soluble polysaccharide (WSP) increased continuously, and the pentose and glucuronic acid contents in WSP and dilute alkali soluble pectin (ASP) together with the hexose content in ASP increased initially and then decreased due to polysaccharide hydrolases pectinase, polygalacturonase and cellulase. After HPD, the bound phenolic content in WSP, ASP and water unextractable polysaccharide (WUP) significantly increased. Protocatechualdehyde and 3,4dihydroxybenzeneacetic acid were newly generated phenolics and the former combined with all the three polysaccharide grades, while the latter selectively combined with only WSP. During HPD, WSP and ASP surface structures were gradually broken and became loose, but WUP surface structure was a complete and rough sheet structure. Alkaline hydrolysis caused sparser, more porous surfaces of the three polysaccharide grades. The polyphenol selectivity could be related to substrate selectivity of endogenous oxidases and the type of phenolic compounds.
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