Preparation and characteristics of yak casein hydrolysate–iron complex
Preparation and characteristics of yak casein hydrolysate–iron complex
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DOI：
10.1111/j.1365-2621.2011.02672.x
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发表时间：
2011-08
影响因子：
3.3
通讯作者：
Xu Wang;Ming Li;Min Li;X. Mao;Jie Zhou;F. Ren
中科院分区：
文献类型：
--
作者：
Xu Wang;Ming Li;Min Li;X. Mao;Jie Zhou;F. Ren
Summary The effect of mass ratio between yak casein hydrolysate and FeSO4, reaction temperature, pH and holding time on ferrous-binding capacity of yak casein hydrolysate was investigated. Iron-releasing percentage and structural characteristics of the formed yak casein hydrolysate–iron complex were also examined. Results showed that casein hydrolysates with different hydrolysis degrees (DH) possessed different ferrous-binding capacities with the highest of 7-h hydrolysate. The optimal binding conditions between yak casein hydrolysate and iron are mass ratio of casein hydrolysate to FeSO4 of 15:1 for 20 min at 40 °C and pH 6.0. The principal binding site for Fe2+ in yak casein hydrolysate consists of the carboxylate groups and amide groups. Compared with ferrous sulphate, yak casein hydrolysate–iron complex has higher iron-releasing percentage at basic conditions, such as pH 7.0, 7.5 and 8.0. Ferrous-iron enriched casein hydrolysate, i.e. yak casein hydrolysate–iron complex, may have great potential as an effective delivery vehicle of bioavailable iron.
