Antifungal effect of essential oil components against <i>Aspergillus niger</i> when loaded into silica mesoporous supports

Bernardos, Andrea; Marina, Teresa; Žáček, Petr; Pérez‐Esteve, Édgar; Martínez‐Máñez, Ramón; Lhotka, Miloslav; Kouřimská, Lenka; Pulkrábek, J.; Klouček, Pavel

doi:10.1002/jsfa.7022

Cited by 72 publications

(44 citation statements)

References 41 publications

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“…Formulation technologies for overcoming these drawbacks include nanoemulsions, β‐cyclodextrin encapsulation, and various polymer‐based films . Recently, novel encapsulation technologies enabling sustained release have become an important strategy for improving the applicability of natural antimicrobials, and encapsulation into nanocomposites has proved suitable for protecting and preserving the effectiveness of bioactive substances . However, the porous structures used for encapsulation are typically produced via expensive and complex synthetic routes.…”

Section: Introductionmentioning

confidence: 99%

The efficacy of essential oil components loaded into montmorillonite against Aspergillus niger and Staphylococcus aureus

Bernardos

Božík

Álvarez

et al. 2019

Flavour & Fragrance J

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Essential oil components (EOCs) are potent natural antimicrobial agents, but their high volatility and reactivity limit their potential applications. Here, we report the preparation of a series of nanomaterials containing EOCs (i.e., allyl isothiocyanate, carvacrol, cinnamaldehyde, diallyl disulphide, eugenol and thymol). The materials were prepared by simple adsorption of the EOCs onto a montmorillonite nanoclay. The antimicrobial activities of these materials were assessed against Aspergillus niger and Staphylococcus aureus as typical models of agricultural fungal pathogens and foodborne bacterial pathogens, respectively. In addition, the activities of the encapsulated EOCs were compared with those of the corresponding free forms with or without Tween‐80 in two types of assays: microdilution assays for determining the minimum inhibitory concentration (MIC) and agar‐based assays mimicking surface treatment. Enhanced antifungal activity of the encapsulated form was observed for all EOCs. In addition, against S. aureus, the MICs of all EOCs were remarkably lower in encapsulated form than in free form. These results indicate that EOCs encapsulated in low‐cost nanoclays have favourable potential as antimicrobials compared with the pure compounds.

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Section: Introductionmentioning

confidence: 99%

The efficacy of essential oil components loaded into montmorillonite against Aspergillus niger and Staphylococcus aureus

Bernardos

Božík

Álvarez

et al. 2019

Flavour & Fragrance J

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“…Bernardos et al. () used MCM‐41 to encapsulate essential oils, achieving an important growth reduction of Aspergillus niger in comparison with nonencapsulated essential oils. More recently, Yu et al.…”

Section: Introductionmentioning

confidence: 99%

Improving the Antimicrobial Power of Low‐Effective Antimicrobial Molecules Through Nanotechnology

Ruiz-Rico

Pérez‐Esteve

Torre

et al. 2018

Journal of Food Science

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Consumers demand for high-quality products, free from chemical preservatives, with an extended shelf-life. In this study, a really powerful antimicrobial agent based on a nanomaterial functionalized with a non-antimicrobial organic molecule was developed as a proof of concept. Following this approach it could be possible to develop a new generation of natural and removable antimicrobials based on their anchoring to functional surfaces for food, agricultural or medical purposes.

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“…The insecticide imidacloprid was effectively loaded into MSNs with different pore sizes, morphologies and mesoporous structures for termite control [23]. Bernardos reported that essential oil components loaded into MSNs had sustained antifungal activities against Aspergillus niger [24]. In the case of unmodified MSNs, which have only silanol groups on the pore channel walls, pesticide molecules that had diffused into the MSNs’ nanopores could only release in a slow and sustained mannner.…”

Section: Introductionmentioning

confidence: 99%

Quaternized Chitosan-Capped Mesoporous Silica Nanoparticles as Nanocarriers for Controlled Pesticide Release

et al. 2016

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Nanotechnology-based pesticide formulations would ensure effective utilization of agricultural inputs. In the present work, mesoporous silica nanoparticles (MSNs) with particle diameters of ~110 nm and pore sizes of ~3.7 nm were synthesized via a liquid crystal templating mechanism. A water-soluble chitosan (CS) derivative (N-(2-hydroxyl)propyl-3-trimethyl ammonium CS chloride, HTCC) was successfully capped on the surface of pyraclostrobin-loaded MSNs. The physicochemical and structural analyses showed that the electrostatic interactions and hydrogen bonding were the major forces responsible for the formation of HTCC-capped MSNs. HTCC coating greatly improved the loading efficiency (LC) (to 40.3%) compared to using bare MSNs as a single encapsulant (26.7%). The microstructure of the nanoparticles was revealed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The pyraclostrobin-loaded nanoparticles showed an initial burst and subsequent sustained release behavior. HTCC-capped MSNs released faster than bare MSNs in the initial stage. Pyraclostrobin-loaded HTCC-capped MSNs with half doses of pyraclostrobin technical demonstrated almost the same fungicidal activity against Phomopsis asparagi (Sacc.), which obviously reduced the applied pesticide and enhanced the utilization efficiency. Therefore, HTCC-decorated MSNs demonstrated great potential as nanocarriers in agrochemical applications.

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Antifungal effect of essential oil components against Aspergillus niger when loaded into silica mesoporous supports

Cited by 72 publications

References 41 publications

The efficacy of essential oil components loaded into montmorillonite against Aspergillus niger and Staphylococcus aureus

The efficacy of essential oil components loaded into montmorillonite against Aspergillus niger and Staphylococcus aureus

Improving the Antimicrobial Power of Low‐Effective Antimicrobial Molecules Through Nanotechnology

Quaternized Chitosan-Capped Mesoporous Silica Nanoparticles as Nanocarriers for Controlled Pesticide Release

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