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Antimicrobial Activity from Volatile Natural Products

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Natural Products Chemistry".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 2636

Special Issue Editor


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Guest Editor
Instituto de Química, Universidade de São Paulo, São Paulo 05508-000, Brazil
Interests: natural products; essential oils; bioactivity; cosmetic applications; GC/MS; NMR

Special Issue Information

Dear Colleagues,

The use of volatile natural products, such as essential oils, as sanitizing agents or preservatives dates to ancient civilizations. It is believed that the ancient Egyptians were the first to recognize these fragrance properties. Currently, the rise in multidrug-resistant microbial infections is increasing with the pandemic, accelerating outbreaks of hospital infections. The synergistic effects of antibiotics and essential oils can be one strategy to counter the resistance mechanisms developed in multidrug-resistant microorganisms. An additional advantage of natural volatiles is that they can be used in the preventive treatment of nosocomial infections. Due to their volatility, they can treat large areas without requiring direct contact with surfaces, which makes them suitable for using as disinfectants of rooms and as air decontaminants as well as in the removal and prevention of microbial biofilms.

The purpose of this Special Issue is to compile original research and critical reviews on various aspects of antimicrobial properties from natural volatiles. Topics related to advances in methods and technologies pertinent to multidisciplinary studies on new natural volatiles, such as synergism, mechanism of action, and vapor phase activity, are particularly welcome. The papers should contribute significantly to further scientific knowledge in the above-mentioned research fields.

Prof. Dr. Paulo Roberto H. Moreno
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • volatile constituents
  • essential oils
  • antimicrobial activity
  • antibiofilm activity
  • antibiotic-resistance
  • vapor phase activity
  • synergy studies

Published Papers (1 paper)

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Research

14 pages, 821 KiB  
Article
Variation in the Antibacterial and Antioxidant Activities of Essential Oils of Five New Eucalyptus urophylla S.T. Blake Clones in Thailand
by Sapit Diloksumpun, Nalin Wongkattiya, Kittisak Buaban, Tharinee Saleepochn, Panawan Suttiarporn and Suwaporn Luangkamin
Molecules 2022, 27(3), 680; https://doi.org/10.3390/molecules27030680 - 20 Jan 2022
Cited by 9 | Viewed by 2077
Abstract
Eucalyptus oils are widely used for a variety of purposes. This study investigates the terpenoid compositions and antibacterial and antioxidant activities of eucalypt leaf oils extracted from four E. urophylla clones and one E. urophylla × E. camaldulensis hybrid clone grown in Thailand. [...] Read more.
Eucalyptus oils are widely used for a variety of purposes. This study investigates the terpenoid compositions and antibacterial and antioxidant activities of eucalypt leaf oils extracted from four E. urophylla clones and one E. urophylla × E. camaldulensis hybrid clone grown in Thailand. According to GC/MS analysis, the E. urophylla oils were mainly composed of 1,8-cineole, α-terpinyl acetate, β-caryophyllene, and spathulenol, while 1,8-cineole, α-terpinyl acetate, p-cymene, and γ-terpinene were mostly identified in the hybrid oil. All eucalypt oils exhibited a significant bacteriostatic effect against Gram-positive bacteria, Streptococcus pyogenes, Staphylococcus aureus, Listeria monocytogenes, and Bacillus cereus. Only the hybrid oil had an effect on all Gram-negative bacteria tested, including Salmonella typhi, Escherichia coli, Pseudomonas aeruginosa, and Enterobacter aerogenes. These oils have antibacterial properties that vary according to their terpenoid content. Only the hybrid oil had a potent antioxidant effect, with an IC50 value of 4.21 ± 0.35 mg/mL for free radical (DPPH) scavenging. This oil’s antioxidant effect may be a result of the phenolic terpenoids, thymol and carvacrol. As a result, these oils may be a novel source of antibacterial and antioxidant agents. Additionally, the antibacterial and antioxidant capabilities of the E. urophylla × E. camaldulensis hybrid essential oil are reported for the first time. Full article
(This article belongs to the Special Issue Antimicrobial Activity from Volatile Natural Products)
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