淀粉基番茄红素复合物的储藏稳定性及降解动力学变化

Changes in Storage Stability and Degradation Kinetics of Starch-based Lycopene Complexes

为了研究淀粉基番茄红素复合物的储藏稳定性及降解动力学,对ALCs(Amylose-Lycopene Complexes,ALCs)的色泽、抗氧化活性和番茄红素保留率变化等指标进行测定。研究发现:ALCs具有良好的色泽,在储藏前7 d颜色无显著变化;常温无氧避光储藏28 d后,其颜色衰减率仅为26.51%。此外,ALCs中番茄红素的保留率和对DPPH自由基的清除率分别高达65.84%和23.54%,均显著高于对照组直链淀粉-番茄红素物理混合物11.37%的保留率和4.97%的清除率(P<0.01);同时,储藏过程中,ALCs中番茄红素的降解符合二级动力学模型,其半衰期T1/2和十分之一衰期T9/10分别为57.99 d和8.78 d,显著优于对照组的8.70 d和1.32 d。结果显示,ALCs表现出优异的储藏稳定性,有效维持番茄红素的颜色、含量及抗氧化活性,为稳定植物来源的番茄红素功能成分提供理论依据。

The storage stability and degradation kinetics of amylose-lycopene complexes(ALC)were studied by evaluating various indicators,such as color attributes,antioxidant efficacy,and lycopene retention rate.ALCs demonstrated excellent color stability,exhibiting no significant color changes in the initial seven-day pre-storage period.After 28 days of storage under anoxic conditions at ambient temperature and being shielded from light,the complexes exhibited a 26.51%color degradation rate.Moreover,ALCs had a high lycopene retention rate of 65.84%and an effective scavenging capacity for DPPH radicals of 23.54%,both significantly surpassing the amylose-lycopene physical blend of the control group,which showed a retention rate of 11.37%and a scavenging rate of 4.97%(P<0.01).ALC lycopene degradation over the storage duration adhered to a second-order kinetic model,with a half-life(T1/2)of 57.99 days and a one-tenth life(T9/10)of 8.78 days,substantially outperforming that of the control group at 8.70 and 1.32 days,respectively.The results underscore the superior storage stability of ALCs,which effectively preserve the color,content,and antioxidative properties of lycopene,thus providing a theoretical groundwork for stabilizing functional components of plant-derived lycopene.