In-Situ Comparative Study of Eucalyptus, Basil, Cloves, Thyme, Pine Tree, and Tea Tree Essential Oil Biocide Efficacy

Macchia, Andrea; Aureli, Hélène; Prestileo, Fernanda; Ortenzi, Federico; Sellathurai, Shaila; Docci, Antonella; Cerafogli, Eleonora; Colasanti, Irene Angela; Ricca, Michela; Russa, Mauro Francesco La

doi:10.3390/mps5030037

Cited by 16 publications

(16 citation statements)

References 39 publications

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“…BTE can be simply produced by soaking tea leaves or waste in boiling water to extract functional molecules from the boiling water. A previous study showed that caffeine, catechin, theanine, and theaflavin are the main biomolecules released from tea leaves into the BTE [ 19 , 20 ], as shown in Figure 1 . These biomolecules are rich in polyphenol, hydroxyl, and carboxylic acid groups [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Bio-Based Admixture (Black Tea Extraction) for Better Performance of Metakaolin Blended Cement Mortars

Fang

Wang

et al. 2022

Materials

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With high pozzolanic reactivity, metakaolin (MK) is a popular supplementary cementitious material (SCM), which can be used to partially replace Portland cement in concretes. Due to its small particle size, however, MK can agglomerate, resulting in a nonuniform matrix and underperformance of the produced concrete. To address this issue, this paper exploits a low-cost, bio-based admixture—black tea extract (BTE)—to replace the traditional petroleum-based chemical admixture to enhance the dispersion and workability of MK blended cement mortars. Major biomolecules in the BTE such as caffeine, catechin, theanine, and theaflavin are rich in polyphenol, hydroxyl, and carboxylic acid groups, which can interact with cement particles and have profound effects on the hydration process and microstructure of the hydration products. Experimental studies showed that BTE does improve the workability of the MK blended cement mortar. More importantly, the BTE introduces significant change on the microstructure of the hardened pastes. Both the pores with size less than 50 nm and the total porosity of the hardened paste were significantly reduced, leading to a significant improvement in the micro- and macro-mechanical properties of the hardened paste. Experimental results suggest that up to 35% greater improvement in the compressive strength at 28 days was achieved using the proposed bio-admixture. Economic and environmental advantages of using the BTE as a renewable admixture were also illustrated through analyzing the cost–benefit, embodied carbon, and eco-efficiency of the MK blended mortars.

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Section: Introductionmentioning

confidence: 99%

Bio-Based Admixture (Black Tea Extraction) for Better Performance of Metakaolin Blended Cement Mortars

Fang

Wang

et al. 2022

Materials

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“…Furthermore, their effectiveness depends on the fungal species they treat. However, in front of this weakness, EOs can synergize with other EOs, achieving better biocide results than separately [198,199]. The hydrophobicity of EO compounds could be a weakness in easel painting conservation.…”

Section: Critical Comparison: Can Eos and Light Radiations Be A Good ...mentioning

confidence: 99%

Eco-Sustainable Approaches to Prevent and/or Eradicate Fungal Biodeterioration on Easel Painting

Sala-Luis,

Oliveira-Urquiri,

Bosch-Roig

et al. 2024

Coatings

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Eliminating and controlling fungal biodeterioration is one of the most important challenges of easel painting conservation. Historically, the pathologies produced by biodeterioration agents had been treated with non-specific products or with biocides specially designed for conservation but risky for human health or the environment due to their toxicity. In recent years, the number of research that studied more respectful solutions for the disinfection of paintings has increased, contributing to society’s efforts to achieve the Sustainable Development Goals (SDGs). Here, an overview of the biodeterioration issues of the easel paintings is presented, critically analyzing chemical and eco-sustainable approaches to prevent or eradicate biodeterioration. Concretely, Essential Oils and light radiations are studied in comparison with the most used chemical biocides in the field, including acids, alcohols, and quaternary ammonium salts. This review describes those strategies’ biocidal mechanisms, efficiency, and reported applications in vitro assays on plates, mockups, and real scale. Benefits and drawbacks are evaluated, including workability, easel painting material alterations, health risks, and environmental sustainability. This review shows innovative and eco-friendly methods from an easel painting conservation perspective, detecting its challenges and opportunities to develop biocontrol strategies to substitute traditional chemical products.

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“…In the study conducted by Macchia et al, 2022, the efficacy of pure EOs of eucalyptus, basil, cloves, thyme, pine tree, and tea tree was assessed in situ and compared to a conventional biocide based on quaternary ammonium salts. The tests revealed positive results concerning the synergy of the essential oils, showing a stronger biocide efficacy [ 52 ].…”

Section: Applicability Of Essential Oils In Food Productsmentioning

confidence: 99%

An Update on Effectiveness and Practicability of Plant Essential Oils in the Food Industry

Salanță

Cropotova

2022

Plants

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Consumer awareness and demands for quality eco-friendly food products have made scientists determined to concentrate their attention on sustainable advancements in the utilization of bioactive compounds for increasing safety and food quality. Essential oils (EOs) are extracted from plants and exhibit antimicrobial (antibacterial and antifungal) activity; thus, they are used in food products to prolong the shelf-life of foods by limiting the growth or survival of microorganisms. In vitro studies have shown that EOs are effective against foodborne bacteria, such as Escherichia coli, Listeria monocytogenes, Salmonella spp., and Staphylococcus aureus. The growing interest in essential oils and their constituents as alternatives to synthetic preservatives has been extensively exploited in recent years, along with techniques to facilitate the implementation of their application in the food industry. This paper’s aim is to evaluate the current knowledge on the applicability of EOs in food preservation, and how this method generally affects technological properties and consumers’ perceptions. Moreover, essential aspects concerning the limitation of the available alternatives are highlighted, followed by a presentation of the most promising trends to streamline the EOs’ usability. Incorporating EOs in packaging materials is the next step for green and sustainable foodstuff production and a biodegradable method for food preservation.

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In-Situ Comparative Study of Eucalyptus, Basil, Cloves, Thyme, Pine Tree, and Tea Tree Essential Oil Biocide Efficacy

Cited by 16 publications

References 39 publications

Bio-Based Admixture (Black Tea Extraction) for Better Performance of Metakaolin Blended Cement Mortars

Bio-Based Admixture (Black Tea Extraction) for Better Performance of Metakaolin Blended Cement Mortars

Eco-Sustainable Approaches to Prevent and/or Eradicate Fungal Biodeterioration on Easel Painting

An Update on Effectiveness and Practicability of Plant Essential Oils in the Food Industry

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