Assessing the Efficiency of Antimicrobial Plant Extracts from Artemisia afra and Eucalyptus globulus as Coatings for Textiles

Nortjie, Elvino; Basitere, Moses; Moyo, Doice; Nyamukamba, Pardon

doi:10.3390/plants13040514

Plants

2024

DOI: 10.3390/plants13040514

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Assessing the Efficiency of Antimicrobial Plant Extracts from Artemisia afra and Eucalyptus globulus as Coatings for Textiles

Elvino Nortjie,

Moses Basitere,

Doice Moyo

et al.

Abstract: This study aimed to assess the antimicrobial activities of plant extracts from Artemisia afra and Eucalyptus globulus when used as coatings for textiles. A pulsed ultrasound-assisted extraction method (PUAE) was employed to obtain methanolic and hexanoic extracts from both plants. Eucalyptus globulus methanol extraction exhibited the highest yield at 22.76% (±0.61%), while Artemisia afra demonstrated lower yields. Phytochemical screening identified various secondary metabolites in the extracts, including pheno… Show more

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Cited by 3 publications

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Artemisia afra and COVID-19, the Media Storm Versus the Current State-of-the-Art

Van der Kooy

2024

Rev. Bras. Farmacogn.

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During the COVID-19 pandemic, the traditional herbal medicine Artemisia afra Jacq. ex Willd., Asteraceae, was widely used as a remedy, and a true media storm erupted in (South) Africa regarding this matter. Throughout the pandemic, A. afra was not only extensively used, but the herb was also exceedingly difficult to find, which is reminiscent of its historical popularity during the influenza pandemic of 1918. This popularity was further fueled by the launch of Covid-Organics in Madagascar, containing Artemisia annua L., which led to international media attention regarding Artemisia as a treatment for COVID-19. In 2020, millions in research funding were made available in South Africa to study promising traditional medicines, including A. afra, and for the development of an effective remedy which was lacking at the time. Due to its popularity and widespread use, this updated overview of A. afra aimed to collate all scientific data on its chemistry, general in vitro and in vivo biological bioactivity, and its antiviral and Sars-Cov-2 activity reported since 2019. Several studies reported good in vitro antiparasitic activity and in vivo antispasmodic activity. However, many studies reported on biological activities that were many orders of magnitude less active than their positive controls. Surprisingly, not a single in vivo study, patent, or (registered) clinical trial could be found regarding A. afra and COVID-19. Only one study, conducted by a German-Danish research group, reported on the in vitro activity of A. afra extracts against Sars-Cov-2. The results indicated that there was relatively weak activity of 0.09 mg/ml ± 0.03 (selectivity index of 26.22), but the context cannot be established due to the absence of a positive control, which did not exist at the time. Artemisia afra is still widely used as a general antiviral remedy, and in-depth research in this field must be conducted. Several promising results regarding antispasmodic and antischistosomal activity should also be further explored. Graphical Abstract

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Artemisia afra and COVID-19, the Media Storm Versus the Current State-of-the-Art

Van der Kooy

2024

Rev. Bras. Farmacogn.

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A comprehensive review on medicinal plant extracts as antibacterial agents: Factors, mechanism insights and future prospects

Zouine,

Ghachtouli,

Abed

et al. 2024

Scientific African

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Synergetic antibacterial and UV-protective finishing of cotton fabric functionalized with copper oxide nanoparticles and phenolic compounds of Azolla Nilotica algae extracts

Moges,

Haile,

Firew

et al. 2024

Journal of Industrial Textiles

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A new approach for functional finishing of cotton fabric using copper oxide nanoparticles and the phenolic compound of Azolla nilotica algae extract synergistically. In this sense, green synthesis nanoparticles have gained enormous attention in today’s world due to the ongoing demand to develop risk-free and high-efficiency functional cotton fabric compared to other methods. This study carried out the green synthesis of CuONPs with algae extract as a reducing agent and CuSO4 as a metal precursor. Phenolic compounds were prepared from algae extract through liquid-phase separation and combined with CuONPs to enhance the functionality of cotton. CuONPs were characterized using X-ray diffraction (XRD), a scanning electron microscope (SEM), FTIR spectral analysis, and a UV-vis spectrophotometer. The average particle size obtained was 21.59 nm. Optimization of process parameters for treating cotton fabric with CuONPs and phenolic compounds of algae extract was done using Box Behenken Design through the dip coating method. Finally, the fabric was evaluated for its multi-functionality in terms of antibacterial activity and percent blocking of ultraviolet radiation. From the optimization solution, the optimum values of 27.625 mm Zone of inhibition (ZOI) for gram-negative bacteria, 23.88 mm ZOI for gram-positive bacteria, and percent blocking of ultraviolet radiation with a value of 99.99% were obtained. In summary, the combination of CuONPs and phenolic compounds in Azolla notica algae extract possesses excellent potential for the functionalization of cotton fabric without affecting its comfort properties. Hence, they can be used as an inexpensive, promising, and efficient alternative for functional purposes.

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Assessing the Efficiency of Antimicrobial Plant Extracts from Artemisia afra and Eucalyptus globulus as Coatings for Textiles

Cited by 3 publications

References 33 publications

Artemisia afra and COVID-19, the Media Storm Versus the Current State-of-the-Art

Artemisia afra and COVID-19, the Media Storm Versus the Current State-of-the-Art

A comprehensive review on medicinal plant extracts as antibacterial agents: Factors, mechanism insights and future prospects

Synergetic antibacterial and UV-protective finishing of cotton fabric functionalized with copper oxide nanoparticles and phenolic compounds of Azolla Nilotica algae extracts

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