Evaluation of the Antibacterial Properties of Polyvinyl Alcohol-Pullulan Scaffolds Loaded with Nepeta racemosa Lam. Essential Oil and Perspectives for Possible Applications

Essential oil of Lam. was extracted and characterized to determine its antimicrobial activity and potential use in applications. The essential oil was loaded on polyvinyl alcohol-pullulan films and gels and characterized by optical microscopy, scanning electron microscopy, and UV-Vis spectroscopy be...

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Bibliographic Details
Published in:Plants (Basel) 2023-02, Vol.12 (4), p.898
Main Authors: Lungoci, Constantin, Rîmbu, Cristina Mihaela, Motrescu, Iuliana, Serbezeanu, Diana, Horhogea, Cristina Elena, Vlad-Bubulac, Tăchiță, Ghițău, Carmen Simona, Puiu, Ioan, Neculai-Văleanu, Andra-Sabina, Robu, Teodor
Format: Article
Language:English
Subjects:
Acids
Antibacterial activity
Antimicrobial activity
Antimicrobial agents
Drug resistance
essential oil
Essential oils
Food
Food industry
Food packaging
Gas chromatography
Gels
Gentamicin
Hydrogels
Light microscopy
Mass spectroscopy
Morphology
Nepeta
Nepeta racemosa
Oils & fats
Optical microscopy
Pharmaceutical industry
Polymers
Polyvinyl alcohol
Pullulan
Scanning electron microscopy
Spectrum analysis
Tissue engineering
Ultraviolet spectroscopy
VOCs
Volatile organic compounds
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Summary:Essential oil of Lam. was extracted and characterized to determine its antimicrobial activity and potential use in applications. The essential oil was loaded on polyvinyl alcohol-pullulan films and gels and characterized by optical microscopy, scanning electron microscopy, and UV-Vis spectroscopy before having its antimicrobial capacities assessed. The essential oil extracted from Lam. was characterized using gas chromatography coupled with mass spectroscopy, which indicated that the most abundant component was nepetalic acid (55.5%), followed by eucalyptol (10.7%) and other compounds with concentrations of about 5% or less. The essential oil, as well as the loaded films and gels, exhibited good antibacterial activity on both gram-positive and gram-negative strains, with growth inhibition zones larger in some cases than for gentamicin, indicating excellent premises for using these essential-oil-loaded materials for applications in the food industry or biomedicine.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants12040898