Evaluation of antioxidant properties of Heracleum Lasiopetalum extract in multilayer nanoemulsion with biopolymer coatin
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ORIGINAL PAPER
Evaluation of antioxidant properties of Heracleum Lasiopetalum extract in multilayer nanoemulsion with biopolymer coating to control oxidative stability of sunflower oil Mahsa Yazdan‑Bakhsh1 · Mojtaba Nasr‑Esfahani2 · Reza Esmaeilzadeh‑Kenari3 · Mohammad Fazel‑Najafabadi4 Received: 7 September 2020 / Accepted: 6 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The antioxidant potential of Heracleum Lasiopetalum extract (GE) as a natural antioxidant in multilayer nanoemulsion was measured. GE obtained using an ultrasonic bath. Extraction efficiency and the total phenolic compounds of the extract were 5.12% and 84.17 μg GA/mg extract, respectively. Antioxidant activity of 200, 400, 600, 800, and 1000 ppm of GE measured by DPPH free radical scavenging methods and, iron reduction assay, then compared with the 100 ppm of TBHQ synthetic antioxidant. The results showed that the antioxidant activity increased with increasing the concentration of the extract in both methods. Three optimized water-in-oil in water emulsion (W/O/W) produced according to the encapsulation efficiency, particle size and zeta potential of nanocapsules as responses of surface methodology as follows: (Lepidium sativum seed gum (emulsifier: 36.30%, oil: 50.46% and extract: 9.52%), whey protein concentrate (emulsifier: 30.85%, oil: 57.07% and extract: 7.12%) and MIX (emulsifier: 39.87%, oil: 54.98% and extract: 9.05%)). Antioxidant activity of 800 ppm of the free and encapsulated extract in different coatings materials compared to SFO containing TBHQ (TBHQ) and SFO without antioxidants (control) stored at 60 °C for 24 days. The oxidation indexes of oil samples include peroxide value, thiobarbituric acid value, and p-anisidine value measured at four-days intervals. The GE encapsulated in whey protein concentrate coating showed less oil oxidation than control and TBHQ samples. These results exhibited that whey protein concentrate is the high-performance coating for encapsulating GE and it can be used as a natural antioxidant and alternative for synthetic antioxidants. Keywords Antioxidant properties · Controllable release · Phenolic compounds · Lepidium sativum seed gum · Whey protein concentrate
Introduction The use of oilseeds in food, pharmacy and cosmetics has made farmers very willing to plant them. Sunflower (Helianthus annuus) is one of the major oilseeds in the world, * Mojtaba Nasr‑Esfahani [email protected] 1
Department of Food Science and Technology, Najafabad Branch, Islamic Azad University, Najafabad, Iran
2
Department of Chemistry, Najafabad Branch, Islamic Azad University, Najafabad, Iran
3
Department of Food Science and Technology, Sari Agricultural Sciences & Natural Resources University (SANRU), Sari, Iran
4
Department of Food Science and Technology, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
which due to the high oil yield, high nutritional value and lack of anti-nutritional factors, the area under cultivation has increased [1]. Ox
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