Sodium alginate films incorporated with Lepidium sativum (Garden cress) extract as a novel method to enhancement the oxidative stability of edible oil

• Published in: International journal of biological macromolecules 2024-04, Vol.265 (Pt 1), p.130949-130949, Article 130949
• Main Authors: Alshehri, Azizah A., Kamel, Reham M., Gamal, Heba, Sakr, Hazem, Saleh, Mohamed N., El-Bana, Mohamed, El-Dreny, El-Shahat Gomaa, El.Fadly, Enas, Abdin, Mohamed, Salama, Mohamed Abdelbaset, Elsayed, Mahmoud
• Format: Article
• Language: English
• Subjects: Biodegradable film; cooking fats and oils; flavonoids; Garden cress extract; Lepidium sativum; Oxidative stability; permeability; peroxide value; Sodium alginate; solubility; Sunflower oil; tensile strength; thermal stability; water content; water vapor
• ISSN: 0141-8130; 1879-0003
• DOI: 10.1016/j.ijbiomac.2024.130949

This study addresses the growing interest in bio-based active food packaging by infusing Lepidium sativum (Garden cress) seeds extract (GRCE) into sodium alginate (SALG) films at varying concentrations (1, 3, and 5 %). The GRCE extract revealed six phenolic compounds, with gallic and chlorogenic acids being prominent, showcasing substantial total phenolic content (TPC) of 139.36 μg GAE/mg and total flavonoid content (TFC) of 26.46 μg RE/mg. The integration into SALG films significantly increased TPC, reaching 30.73 mg GAE/g in the film with 5 % GRCE. This enhancement extended to DPPH and ABTS activities, with notable rises to 66.47 and 70.12 %, respectively. Physical properties, including tensile strength, thickness, solubility, and moisture content, were positively affected. A reduction in water vapor permeability (WVP) was reported in the film enriched with 5 % GRCE (1.389 × 10−10 g H2O/m s p.a.). FT-IR analysis revealed bands indicating GRCE's physical interaction with the SALG matrix, with thermal stability of the films decreasing upon GRCE integration. SALG/GRCE5 effectively lowered the peroxide value (PV) of sunflower oil after four weeks at 50 °C compared to the control, with direct film-oil contact enhancing this reduction. Similar trends were observed in the K232 and K270 values. [Display omitted]