Inhibitory effect of soy protein coating formulations on walnut (Juglans regia L.) kernels against lipid oxidation

Hye Jin Kang, Sung Jin Kim, Young Sun You, Monique Lacroix, Jaejoon Han

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The aim of this study was to improve the fat stability in walnut (Juglans regia L.) kernels using an edible coating treatment. Coating solutions were composed of soy protein isolate (SPI), carboxymethylcellulose (CMC) and catechin (CT). Walnuts were dipped in coating solution, dried and stored under abuse temperature condition (35 °C) for 21 days. Lipid oxidation was evaluated by peroxide and thiobarbituric acid reactive substance (TBARS) measurements. Results showed a slight decrease in peroxide values (POV) and a significant reduction of TBARS by coating treatment. The SPI-CT and SPI/CMC-CT coatings were the most effective and decreased the POV by 27 and 31%, respectively, as compared to uncoated walnut after 21 days. The SPI-CT and SPI/CMC-CT coatings also decreased the TBARS value by 16 and 26%, respectively. The incorporation of CT in SPI-based coatings resulted in a synergistic effect on the lipid oxidation preservation. The results of this study show that soy protein-based coating could be a good carrier for antioxidant molecules, and an effective preservative method for extending shelf life and improving the quality stability of oxidation-sensitive kernels.

Original languageEnglish
Pages (from-to)393-396
Number of pages4
JournalLWT - Food Science and Technology
Volume51
Issue number1
DOIs
Publication statusPublished - 2013 Apr 1
Externally publishedYes

Fingerprint

Juglans
Soybean Proteins
Juglans regia
walnuts
soy protein
soy protein isolate
Catechin
coatings
catechin
lipid peroxidation
Lipids
Carboxymethylcellulose Sodium
seeds
Thiobarbituric Acid Reactive Substances
carboxymethylcellulose
Peroxides
thiobarbituric acid-reactive substances
peroxide value
edible films
preservatives

Keywords

  • Antioxidant
  • Edible coating
  • Lipid oxidation
  • Soy protein
  • Walnut

ASJC Scopus subject areas

  • Food Science

Cite this

Inhibitory effect of soy protein coating formulations on walnut (Juglans regia L.) kernels against lipid oxidation. / Kang, Hye Jin; Kim, Sung Jin; You, Young Sun; Lacroix, Monique; Han, Jaejoon.

In: LWT - Food Science and Technology, Vol. 51, No. 1, 01.04.2013, p. 393-396.

Research output: Contribution to journalArticle

Kang, Hye Jin ; Kim, Sung Jin ; You, Young Sun ; Lacroix, Monique ; Han, Jaejoon. / Inhibitory effect of soy protein coating formulations on walnut (Juglans regia L.) kernels against lipid oxidation. In: LWT - Food Science and Technology. 2013 ; Vol. 51, No. 1. pp. 393-396.
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