Effects of 60Co-irradiation and superfine grinding wall disruption pretreatment on phenolic compounds in pine (Pinus yunnanensis) pollen and its antioxidant and α-glucosidase-inhibiting activities

Food Chem. 2021 May 30:345:128808. doi: 10.1016/j.foodchem.2020.128808. Epub 2020 Dec 5.

Abstract

Effects of 60Co-irradiation and superfine grinding wall disruption on the phenolic, antioxidant activity, and α-glucosidase-inhibiting potential of pine pollen were investigated. Eight soluble phenolics (SP) and insoluble-bound phenolic (IBP) compounds were characterized for the first time. After 60Co-irradiation, total phenolic content (TPC) and total flavonoid content (TFC) in SP increased by 16.90% and 14.66%, respectively; in IBP, they decreased by 53.26% and 21.57%, respectively; whereas they were unchanged in pine pollen, but antioxidant activity decreased by 29.18%-40.90%. After superfine grinding wall disruption, the TPC and TFC in IBP increased by 80.24% and 27.24%, respectively; in pine pollen, they increased by 22.66% and 10.61%, respectively; whereas they were unchanged in SP; and their antioxidant activity increased by 46.68%-58.06%. Both pretreatments had a little effect on the α-glucosidase-inhibiting activities of pine pollen. These results would be helpful in promoting the application of pine pollen in functional food.

Keywords: (60)Co-irradiation; Antioxidant activity; Phenolic compounds; Pine pollen; Superfine grinding wall disruption; α-Glucosidase-inhibiting activity.

MeSH terms

  • Antioxidants / analysis
  • Antioxidants / pharmacology
  • Cobalt Radioisotopes*
  • Food Handling
  • Glycoside Hydrolase Inhibitors / analysis
  • Glycoside Hydrolase Inhibitors / pharmacology
  • Mechanical Phenomena*
  • Phenols / analysis*
  • Phenols / pharmacology*
  • Pinus / chemistry*
  • Pinus / radiation effects
  • Pollen / chemistry*
  • Pollen / radiation effects*

Substances

  • Antioxidants
  • Cobalt Radioisotopes
  • Glycoside Hydrolase Inhibitors
  • Phenols
  • Cobalt-60