Analytical reagent grade water purification system

All of the chemicals were at least analytical grade. Low-molecular-weight chitosan powder was purchased from Sigma-Aldrich (Product No. 448869, Darmstadt, Germany), with a deacetylation degree of 91.7% and MW 359 kDa; Arabic gum (Ph Eur, BP) was purchased from Merck (Darmstadt, Germany); glacial acetic acid (ACS 99.7%) was purchased from PanReac (Barcelona, Spain); sunflower oil was purchased from Mercadona S.A (València, Spain); and oregano essential oil (OEO) was acquired from Essenciales (Barcelona, Spain). All of the chemicals were used as received. Ultra-pure water with a resistivity of 18 MΩ cm⁻¹, obtained from a Milli-Q analytical reagent-grade water purification system (Millipore, Burlington, MA, USA), was utilized for all the experimental procedures.

All of the chemicals were at least analytical grade. Low-molecular-weight chitosan powder was purchased from Sigma-Aldrich (Product No. 448869, Darmstadt, Germany), with a deacetylation degree of 91.7% and MW 359 kDa; Arabic gum (Ph Eur, BP) was purchased from Merck (Darmstadt, Germany); glacial acetic acid (ACS 99.7%) was purchased from PanReac (Barcelona, Spain); sunflower oil was purchased from Mercadona S.A (València, Spain); and oregano essential oil (OEO) was acquired from Essenciales (Barcelona, Spain). All of the chemicals were used as received. Ultra-pure water with a resistivity of 18 MΩ cm⁻¹, obtained from a Milli-Q analytical reagent-grade water purification system (Millipore, Burlington, MA, USA), was utilized for all the experimental procedures.