Antioxidant and antimicrobial biofoil based on chitosan and Japanese knotweed (Fallopia japonica, Houtt.) : rhizome bark extract

Naumoska, Katerina (avtor), Jug, Urška (avtor), Kõrge, Kristi (avtor), Oberlintner, Ana (avtor), Golob, Majda (avtor), Novak, Uroš (avtor), Vovk, Irena (avtor), Likozar, Blaž (avtor)

A 70% ethanol(aq) extract of the rhizome bark of the invasive alien plant species Japanese knotweed (JKRB) with potent (in the range of vitamin C) and stable antioxidant activity was incorporated in 1% w/v into a chitosan biofoil, which was then characterized on a lab-scale. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay confirmed the antioxidant activity of the JKRB biofoil upon contact with the food simulants A, B, C, and D1 (measured half-maximal inhibitory concentrations—IC50) and supported the Folin–Ciocalteu assay result. The migration of the antioxidant marker, (−)-epicatechin, into all food simulants (A, B, C, D1, D2, and E) was quantified using liquid chromatography hyphenated to mass spectrometry (LC-MS). Calculations showed that 1 cm2 of JKRB biofoil provided antioxidant activity to ~0.5 L of liquid food upon 1 h of contact. The JKRB biofoil demonstrated antimicrobial activity against Gram-positive bacteria. The incorporation of JKRB into the chitosan biofoil resulted in improved tensile strength from 0.75 MPa to 1.81 MPa, while elongation decreased to 28%. JKRB biofoil’s lower moisture content compared to chitosan biofoil was attributed to the formation of hydrogen bonds between chitosan biofoil and JKRB compounds, further confirmed with attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). The JKRB biofoil completely degraded in compost in 11 days. The future upscaled production of JKRB biofoil from biowastes for active packaging may support the fights against plastic waste, food waste, and the invasiveness of Japanese knotweed, while greatly contributing to the so-called ‘zero-waste’ strategy and the reduction in greenhouse gas emissions.

• Jezik: Angleški jezik
• Ključne besede: Japanese knotweed rhizome bark extract, chitosan, antioxidant biofoil, antimicrobial activity, biodegradable material, active packaging
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: VF - Veterinarska fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: 22 st.
• Številčenje: Vol. 11, no. 6, art. 1200
• PID: 20.500.12556/RUL-137960
• UDK: 579
• ISSN pri članku: 2076-3921
• DOI: 10.3390/antiox11061200
• COBISS.SI-ID: 112904195
• Datum objave v RUL: 08.07.2022

Gradivo je del revije

• Naslov: Antioxidants
• Skrajšan naslov: Antioxidants
• Založnik: MDPI
• ISSN: 2076-3921
• COBISS.SI-ID: 522976025

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 08.07.2022

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P1-0005
• Naslov: Funkcionalna živila in prehranska dopolnila

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0152
• Naslov: Kemijsko reakcijsko inženirstvo