Insight into the stabilization mechanism of emulsions stabilized by Maillard conjugates: Protein hydrolysates-dextrin with different degree of polymerization
文献类型: 外文期刊
作者: Pan, Yi 1 ; Wu, Zhengzong 3 ; Xie, Qiu-Tao 2 ; Li, Xiao-Min 1 ; Meng, Ran 1 ; Zhang, Bao 1 ; Jin, Zheng-Yu 5 ;
作者机构: 1.Hefei Univ Technol, Minist Educ, Engn Res Ctr Bioproc, 193 Tunxi Rd, Hefei 230009, Anhui, Peoples R China
2.Hunan Acad Agr Sci, Hunan Agr Prod Proc Inst, Changsha, Hunan, Peoples R China
3.Qilu Univ Technol, Shandong Acad Sci, Sch Food Sci & Engn, Jinan, Shandong, Peoples R China
4.Hefei Univ Technol, Sch Food & Biol Engn, 193 Tunxi Rd, Hefei 230009, Anhui, Peoples R China
5.Jiangnan Univ, State Key Lab Food Sci & Technol, Wuxi 214122, Jiangsu, Peoples R China
关键词: Whey protein hydrolysates; Linear dextrin; Conjugates; O/W emulsion; Physical stability; Oxidative stability
期刊名称:FOOD HYDROCOLLOIDS ( 影响因子:9.147; 五年影响因子:9.169 )
ISSN: 0268-005X
年卷期: 2020 年 99 卷
页码:
收录情况: SCI
摘要: The physical and oxidation stability of emulsions stabilized by conjugates prepared by Maillard reaction between whey protein hydrolysates (WPH) and linear dextrin (LD) with different degree of polymerization (DP) were investigated. In accordance with the gradient ethanol precipitation, LD1 (DP = 23.78), LD2 (DP = 47.62) and LD3 (DP = 64.96) were prepared. WPH-LD conjugates were obtained by Maillard reaction in dry-heating condition and the degree of glycation (DG) of conjugates increased with the increasing content of LD. Structural analysis (fluorescence spectra and circular dichroism) revealed that the secondary structure of WPH changed after glycation and the conjugates had less alpha-helix content than unmodified WPH. Meanwhile, the greater DPPH radical scavenging ability and iron chelating activity of conjugates were demonstrated compared with unmodified WPH. Conjugates containing LD with low and middle DP could form Pickering emulsions due to the aggregation of LD with short chains. The superior storage stability, oxidative stability and physical stability against environment stress of emulsions stabilized by conjugates, enhanced with increasing DP of LD in conjugates, were attributed to the combined action of stabilization of particle emulsifiers and greater steric hindrance (occupied the dominant position) provided by conjugates. Maillard reaction between LD and WPH was efficient to produce conjugates with high potential use as emulsifying agents to stabilize emulsions with excellent physical and oxidative stability.
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