UV-C light inactivation of penicillium expansum on pear surfaces: Influence on physicochemical and sensory quality during storage

• Author(s) / Creator(s)

  • Syamaladevi, Roopesh M.
  • Lupien, Shari L.
  • Bhunia, Kanishka
  • Sablani, Shyam S.
  • Dugan, Frank
  • Rasco, Barbara
  • Killinger, Karen
  • Dhinga, Amit
  • Ross, Carolyn

• UV-C inactivation kinetic data of Penicillium expansum on intact and wounded pear disks were determined. P. expansum conidia (0.5 mL, 1.6 × 107 CFU/mL) were spot inoculated onto intact and wounded pear tissue with skin (excised disks), treated with UV-C doses ranging 0.101–3.06 kJ/m2 at 23 °C and surviving conidia were enumerated. Changes in selected physicochemical parameters and sensory quality following UV-C treatment of whole pears were determined immediately after treatment, and 4 and 8 weeks of storage at 4 °C. A greater UV-C intensity was required for similar inactivation levels of P. expansum populations on wounded pear disks (3.1 kJ/m2 for 2.7 log reduction) compared to intact pear disks (1.7 kJ/m2 for 2.8 log reduction). No significant difference in % weight loss, or soluble solids content and texture was observed between UV-C treated and untreated pears. However, browning was observed on UV-C treated pear surfaces after 4 and 8 weeks along with changes in flavor and texture. An increase in consumer preference was noticed for the untreated control pears after 4 weeks storage.

• Date created

  2014-01-01

• Subjects / Keywords

  • Color
  • Soluble Solids
  • Surface Disinfection
  • Flavor
  • Texture

• Type of Item

  Article (Draft / Submitted)

• DOI

  https://doi.org/10.7939/r3-peyz-8755

• License

  Attribution-NonCommercial-NoDerivatives 4.0 International