NaCl浓度对肌原纤维蛋白-食用胶混合物功能特性的影响
Effect of NaCl concentration on the functional properties of myofibrillar protein-edible gum mixtures
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摘要: 将卡拉胶、亚麻籽胶、黄原胶和魔芋胶以0.25%(W/W)的添加量分别添加到猪肉肌原纤维蛋白中,制备肌原纤维蛋白-食用胶混合物,通过测定不同浓度NaCl(00.6mol/L)条件下混合物的乳化特性和凝胶特性,研究NaCl浓度对肌原纤维蛋白-食用胶混合物功能特性的影响。结果表明:NaCl浓度在00.4mol/L范围内,肌原纤维蛋白-食用胶混合物的乳化能力、凝胶硬度和保水性均显著增加(p<0.05),并在NaCl浓度为0.4mol/L达到最高值,而当NaCl浓度继续升高至0.6mol/L时,乳化能力、凝胶硬度和保水性均降低;NaCl浓度为00.6mol/L时,肌原纤维蛋白-食用胶混合凝胶的弹性和白度值始终随NaCl浓度的增加而逐渐增加。因此,NaCl浓度对肌原纤维蛋白-食用胶混合物功能特性具有显著的影响。Abstract: Carrageenan, flaxseed gum, xanthan gum and konjac gum were added to the myofibrillar protein at the concentration of 0.25% ( W/W) , respectively.The emulsifying ability and gel textural properties of the prepared mixtures under various concentrations of NaCl ( 0 ~ 0.6mol /L) were determined to elucidate the effect of NaCl concentration on the functional properties of myofibrillar protein-edible gum mixtures.The results showed that the emulsifying ability, the hardness and water- holding of the myofibrillar protein- edible gum mixtures were significantly increased ( p < 0.05) when the NaCl concentration ranged from 0 to 0.4mol /L and reached the max at0.4mol /L NaCl, while the emulsifying ability, the hardness and water- holding decreased when the NaCl concentration increased to 0.6mol /L.The springiness and whiteness values of the myofibrillar protein- edible gum mixtures were always increased when the concentration of NaCl increased from 0 to 0.6mol /L.The results revealed that the NaCl concentration displayed a significant impact on the functional properties of myofibrillar protein-edible gum mixtures.