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

摘要:

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。

Abstract:

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.