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<p>In this study, amylose was modified using γ-irradiation at doses ranging from 0 to 20&#xa0;kGy. The optimal conditions for encapsulating lycopene (LYC) were investigated, and the structural characteristic, antioxidant property, and stability of the resulting amylose-lycopene complex (ALC) were systematically evaluated. The results indicated that irradiation reduced the polymerization degree of amylose from 941 to 443, induced surface wrinkling, and decreased the relative crystallinity from 20.24% to 18.48%. The maximum decomposition temperature of amylose declined from 326.3&#xa0;°C to 319.36&#xa0;°C. The optimal encapsulation efficiency for ALC was 61.96% under the following conditions: irradiation dose of 16&#xa0;kGy, LYC-to-amylose mass ratio of 1:20, reaction temperature of 55.7&#xa0;°C, and reaction time of 115&#xa0;min. The ALC exhibited a typical V-type crystalline pattern of starch-lipid complex. At a LYC concentration of 0.8&#xa0;mg/mL, the ALC showed higher antioxidant activity (81.16%) than free LYC (75.93%) and the physical mixture of LYC and irradiated amylose (76.98%). Furthermore, the complex demonstrated improved thermal stability (1.14- and 1.36-fold increase over LYC and the physical mixture, respectively) and enhanced storage stability (1.75- and 2.21-fold increase, respectively). This study provides a feasible strategy for the modification of amylose and the preparation of ALC with enhanced functional properties.</p>

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Irradiated amylose as a novel carrier for lycopene encapsulation

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • Huili Yan,
  • Liping Cheng,
  • Xian Wang,
  • Dong Zhang,
  • Sisi Chen,
  • Dianhe Zhang,
  • Long Cui

摘要

In this study, amylose was modified using γ-irradiation at doses ranging from 0 to 20 kGy. The optimal conditions for encapsulating lycopene (LYC) were investigated, and the structural characteristic, antioxidant property, and stability of the resulting amylose-lycopene complex (ALC) were systematically evaluated. The results indicated that irradiation reduced the polymerization degree of amylose from 941 to 443, induced surface wrinkling, and decreased the relative crystallinity from 20.24% to 18.48%. The maximum decomposition temperature of amylose declined from 326.3 °C to 319.36 °C. The optimal encapsulation efficiency for ALC was 61.96% under the following conditions: irradiation dose of 16 kGy, LYC-to-amylose mass ratio of 1:20, reaction temperature of 55.7 °C, and reaction time of 115 min. The ALC exhibited a typical V-type crystalline pattern of starch-lipid complex. At a LYC concentration of 0.8 mg/mL, the ALC showed higher antioxidant activity (81.16%) than free LYC (75.93%) and the physical mixture of LYC and irradiated amylose (76.98%). Furthermore, the complex demonstrated improved thermal stability (1.14- and 1.36-fold increase over LYC and the physical mixture, respectively) and enhanced storage stability (1.75- and 2.21-fold increase, respectively). This study provides a feasible strategy for the modification of amylose and the preparation of ALC with enhanced functional properties.