In the present study, it was aimed to evaluate the effect of gamma irradiation (0, 2.5, and 5 kGy) on physico‐mechanical and structural properties of basil seed mucilage‐chitosan‐based films containing Ziziphora clinopodioides essential oil (ZEO: 0%, 1%, and 2%) and magnesium oxide nanoparticles (MgO: 0%, 0.1%, and 0.2%), and their application on trout fillet´s shelf‐life during refrigerated storage for 18 days. The irradiated films under the cobalt‐60 source at 5 kGy dose had better tensile strength as well as lower swelling index and water vapor transmission rate compared with other prepared films. Therefore, all films selected to package trout fillets were irradiated at 5 kGy dose. Fillets packaged with films containing ZEO 2% + MgO 0.2% and ZEO 2% + MgO 0.1% had the lowest microbial population (total viable count, psychrotrophic count, Pseudomonas spp., P. fluorescens, H₂S producing bacteria, and Enterobacteriaceae) and chemical changes (total volatile base nitrogen content and peroxide value) (p < .05).

中文翻译：

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γ辐照对包含虹鳟鱼包装的紫罗兰色种子油和MgO纳米颗粒的罗勒种子粘胶壳聚糖膜的物理力学和结构性质的影响

在本研究中，本研究旨在评估γ辐照（0、2.5和5 kGy）对含紫罗兰种子奇异果糖基罗勒种子黏液-壳聚糖的薄膜的物理机械和结构性能的影响精油（ZEO：0％，1％和2％）和氧化镁纳米颗粒（MgO：0％，0.1％和0.2％）及其在鳟鱼片冷藏保存18天的货架期中的应用。与其他制备的薄膜相比，以60 kCo的剂量在60钴源下辐照的薄膜具有更好的拉伸强度以及更低的溶胀指数和水蒸气透过率。因此，所有选择包装鳟鱼鱼片的薄膜均以5 kGy的剂量进行辐照。用含有ZEO 2％+ MgO 0.2％和ZEO 2％+ MgO 0.1％的薄膜包装的鱼片具有最低的微生物种群（总活菌计数，精神营养菌计数，假单胞菌属，荧光假单胞菌，H ₂产生S的细菌，以及肠杆菌科）和化学变化（总挥发性碱氮含量和过氧化物值）（p  <.05）。