脉冲电场协同加热对乳清蛋白凝胶质构特性的影响
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2011年度安徽省高等学校省级自然科学研究资助项目(KJ2011B165)


Effects of Combined Pulsed Electric Field and Heat Treatment on Texture Characteristics of Whey Protein Gels
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    摘要:

    以乳清蛋白为研究对象,在电场强度15~55kV/cm、脉冲数2~8个、水浴温度50~90℃范围内,通过单因素试验考察各因素对乳清蛋白硬度、弹性和保水性的影响。研究结果表明:乳清蛋白经高压脉冲电场作用后,所形成凝胶的性质有显著变化。与未受高压脉冲电场处理的对照样相比,凝胶硬度、弹性和保水性在电场强度15~25kV/cm时降低,在电场强度35kV/cm时显著提高,45kV/cm时又降低。在电场强度35kV/cm条件下,凝胶硬度、弹性和保水性随着脉冲数的增加而增强,但后期增幅变化不显著。凝胶硬度和弹性在水浴温度为80℃时最佳,保水性在水浴温度为70℃时最佳。

    Abstract:

    By using whey protein isolate as the target, some treating conditions affecting the hardness, elasticity and water holding capacity of the whey protein gels were investigated by the single-factor experiments, among which the electric field strength, pulse numbers and heating temperature varied from 15 to 55kV/cm, 2 to 8 and 50 to 90℃, respectively. The research found that properties of the formed gel have shown significant change after being treated by the high intensity pulsed electric field. Compared with whey protein without effect from the high intensity pulsed electric field, the hardness, elasticity and water holding capacity of gel decreased when the electric field strength varied from 15 to 25kV/cm, increased significantly when the electric field strength was 35kV/cm, but decreased again when the electric field strength was 45kV/cm. When the electric field strength was 35kV/cm, the hardness, elasticity and water holding capacity of gel strengthened with the increase of pulse number, but the later amplification was not remarkable. When heating temperature was 80℃, the hardness and elasticity of gel reached their best. The water holding capacity showed optimal performance when heating temperature was 70℃.

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金声琅,殷涌光,王莹.脉冲电场协同加热对乳清蛋白凝胶质构特性的影响[J].农业机械学报,2013,44(1):142-146.

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  • 在线发布日期: 2012-12-31
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