Affiliation:
1. Center of Excellence in Native Natural Hydrocolloids of Iran Ferdowsi University of Mashhad (FUM) Mashhad Iran
2. Department of Food Safety and Quality Control Research Institute of Food Science and Technology (RIFST) Mashhad Iran
Abstract
AbstractNovel green intelligent films based on basil seed gum (BSG)/chitosan containing red cabbage extract (RCA) (0, 2.5, 5, and 10, % (v/v)) as a colorimetric indicator for food freshness detection were fabricated by casting method. The physicochemical, barrier, mechanical, and antioxidant characteristics, as well as sensitivity to pH and ammonia gas of smart edible packaging films, were investigated. The interaction of anthocyanin extract as a natural dye with biopolymers in films characterized by FTIR spectroscopy and SEM images revealed their suitable compatibility. The film with maximum anthocyanin content (10% (v/v)) appeared robust color changes against various pH and ammonia gas levels. The color of indicator films when exposed to alkaline, neutral and acidic buffers are indicated with green, blue, and red colors, respectively. The DPPH radical scavenging activity of smart BSG/chitosan films improved from 23% to 90.32% with increasing RCA content from 2.5 to 10% (v/v). Generally, the incorporation of RCA in film structure enhanced their solubility, WVP, ΔE, turbidity, and flexibility, and reduced tensile strength. The observations successfully confirmed the efficacy of pH‐sensitive indicator smart film based on BSG/chitosan for evaluation of fish spoilage during storage.
Funder
Ferdowsi University of Mashhad
Iran National Science Foundation
Cited by
4 articles.
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