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Effect of antioxidants in combination of VCO nanoemulsion on gel properties and storage stability of refrigerated sardine surimi gel
International Journal of Food Science & Technology ( IF 2.6 ) Pub Date : 2020-01-17 , DOI: 10.1111/ijfs.14496
Asir Gani 1 , Soottawat Benjakul 1
Affiliation  

Impacts of β‐glucan–virgin coconut oil (VCO) nanoemulsion containing epigallocatechin gallate (EGCG) and α‐tocopherol at levels of 0–3.0 g kg−1 on properties and storage stability of surimi gel were investigated. Augmented breaking force, deformation and fracture constant were obtained in gels containing 2.0 g kg−1 EGCG or 1.0 g kg−1 α‐tocopherol (P < 0.05). Expressible moisture content increased as EGCG levels were more than 2.0 g kg−1. Smoother microstructure was observed in gels containing 2.0 g kg−1 EGCG. Whiter gels were obtained when β‐glucan–VCO nanoemulsion was incorporated. No change in protein pattern of gels was observed regardless of antioxidant incorporation. Viscoelastic moduli decreased as β‐glucan–VCO nanoemulsion was added; however, incorporation of 2.0 g kg−1 EGCG or 1.0 g kg−1 α‐tocopherol lowered the decrease in G'. β‐glucan–VCO nanoemulsion containing gels had higher likeness scores than the control (P < 0.05). Gels containing EGCG and α‐tocopherol at selected levels had the improved oxidative stability and lowered microbial loads.

中文翻译:

抗氧化剂与VCO纳米乳液的组合对冷冻沙丁鱼鱼糜凝胶的凝胶性能和储存稳定性的影响

研究了含有表没食子儿茶素没食子酸酯(EGCG)和α-生育酚(0-3.0 g kg -1)的β-葡聚糖纯椰子油(VCO)纳米乳液对鱼糜凝胶性能和储存稳定性的影响。在含有2.0 g kg -1 EGCG或1.0 g kg -1α-生育酚的凝胶中获得增强的断裂力,变形和断裂常数(P  <0.05)。当EGCG水平超过2.0 g kg -1时,可表达的水分含量增加。在含有2.0 g kg -1的凝胶中观察到更平滑的微观结构EGCG。当掺入β-葡聚糖-VCO纳米乳液时,可获得更白的凝胶。不管抗氧化剂的掺入如何,都没有观察到凝胶的蛋白质模式改变。加入β-葡聚糖-VCO纳米乳液后,粘弹性模量降低。然而,加入2.0 g kg -1 EGCG或1.0 g kg -1α-生育酚可以降低G'的降低。含β-葡聚糖-VCO纳米乳液的凝胶的相似度得分高于对照组(P  <0.05)。含有选定浓度的EGCG和α-生育酚的凝胶具有改善的氧化稳定性和较低的微生物负荷。
更新日期:2020-01-17
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