Antifungal activity of Ca[Zn(OH)3]2·2H2O coatings for the preservation of limestone monuments: An in vitro study

Gómez-Ortíz, N.M.; González-Gómez, Santiago; Rosa-García, Susana De la; Oskam, Gerko; Quintana, P.; Soria-Castro, Montserrat; Gómez‐Cornelio, S.; Ortega-Morales, Benjamín Otto

doi:10.1016/j.ibiod.2014.02.005

Cited by 21 publications

(9 citation statements)

References 39 publications

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“…In particular, inorganic metal oxides such as MgO and ZnO have attracted interest as antimicrobial agents because of their safety and stability [21]. However, several physical and chemical methods are used for the synthesis of NPs and may provide nanoparticles of different morphologies and sizes.…”

Section: Introductionmentioning

confidence: 99%

Antifungal Activity of ZnO and MgO Nanomaterials and Their Mixtures againstColletotrichum gloeosporioidesStrains from Tropical Fruit

Rosa-García

Martínez-Torres

Gómez‐Cornelio³

et al. 2018

Journal of Nanomaterials

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Avocado (Persea americana) and papaya (Carica papaya) are tropical fruits with high international demand. However, these commercially important crops are affected by the fungus Colletotrichum gloeosporioides, which causes anthracnose and results in significant economic losses. The antifungal activity of metal oxide nanomaterials (zinc oxide (ZnO), magnesium oxide (MgO), and ZnO:MgO and ZnO:Mg(OH)2 composites) prepared under different conditions of synthesis was evaluated against strains of C. gloeosporioides obtained from papaya and avocado. All nanoparticles (NPs) at the tested concentrations significantly inhibited the germination of conidia and caused structural damage to the fungal cells. According to the radial growth test, the fungal strain obtained from avocado was more susceptible to the NPs than the strain obtained from papaya. The effect of the tested NPs on the fungal strains confirmed that these NPs could be used as strong antifungal agents against C. gloeosporioides to control anthracnose in tropical fruits.

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Section: Introductionmentioning

confidence: 99%

Antifungal Activity of ZnO and MgO Nanomaterials and Their Mixtures againstColletotrichum gloeosporioidesStrains from Tropical Fruit

Rosa-García

Martínez-Torres

Gómez‐Cornelio³

et al. 2018

Journal of Nanomaterials

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“…The ZnO-based systems showed the best antifungal properties against P. oxalicum and A. niger under simulated photoperiod conditions. In addition, protective coatings containing calcium zinc hydroxide dihydrate (Ca[Zn(OH) 3 ] 2 •2H 2 O) were prepared by sol-gel method and their antifungal properties were studied on different limestone substrates (150). The system showed important antifungal properties under photoperiods of dark and illumination, keeping its antifungal properties after 21 days of inoculation.…”

Section: Antimicrobial Stone Coatingsmentioning

confidence: 99%

New nanomaterials for applications in conservation and restoration of stony materials: A review

et al. 2017

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In recent times, nanomaterials have been applied in the construction and maintenance of the worldÅLs cultural heritage with the aim of improving the consolidation and protection treatments of damaged stone. These nanomaterials include important advantages that could solve many problems found in the traditional interventions. The present paper aims to carry out a review of the state of art on the application of nanotechnology to the conservation and restoration of the stony cultural heritage. We highlight the different types of nanoparticles currently used to produce conservation treatments with enhanced material properties and novel functionalities.

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“…ZnO and compounds such as CaZn 2 (OH) 6 ·2H 2 O are being researched as antifungal, bactericide, and photocatalyst materials (Xie et al [42], Sirelkhatim et al [43], Madhusudhana et al [44], Gomez-Ortiz et al [45], and Hernandez Sierra et al [46]). Gomez-Ortiz et al used CZ as the antifungal precursor of protective coatings for marble and limestone (Gomez-Ortiz et al [45]).…”

Section: Introductionmentioning

confidence: 99%

“…Gomez-Ortiz et al used CZ as the antifungal precursor of protective coatings for marble and limestone (Gomez-Ortiz et al [45]). A drawback when using both ZnO and SiO 2 nanoparticles as an addition in the Portland cement may involve the requirement of a greater amount of mixing water due to a greater amount of fines, which increases the water-cement ratio.…”

Section: Introductionmentioning

confidence: 99%

Viability Study of a Safe Method for Health to Prepare Cement Pastes with Simultaneous Nanometric Functional Additions

Rubia

Lucas-Gil

Reyes

et al. 2018

Advances in Materials Science and Engineering

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e use of a mixing method based on a novel dry dispersion procedure that enables a proper mixing of simultaneous nanometric functional additions while avoiding the health risks derived from the exposure to nanoparticles is reported and compared with a common manual mixing in this work. Such a dry dispersion method allows a greater workability by avoiding problems associated with the dispersion of the particles. e two mixing methods have been used to prepare Portland cement CEM I 52.5R pastes with additions of nano-ZnO with bactericide properties and micro-or nanopozzolanic SiO 2 . e hydration process performed by both mixing methods is compared in order to determine the efficiency of using the method. e hydration analysis of these cement pastes is carried out at different ages (from one to twenty-eight days) by means of differential thermal analysis and thermogravimetry (DTA-TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) analyses. Regardless of composition, all the mixtures of cement pastes obtained by the novel dispersion method showed a higher retardation of cement hydration at intermediate ages which did not occur at higher ages. In agreement with the resulting hydration behaviour, the use of this new dispersion method makes it possible to prepare homogeneous cement pastes with simultaneous functional nanoparticles which are physically supported on the larger particles of cement, avoiding exposure to the nanoparticles and therefore minimizing health risks. Manual mixing of cement-based materials with simultaneous nanometric functional nanoparticles on a large scale would make it difficult to obtain a homogenous material together with the health risks derived from the handling of nanoparticles.

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Antifungal activity of Ca[Zn(OH)3]2·2H2O coatings for the preservation of limestone monuments: An in vitro study

Cited by 21 publications

References 39 publications

Antifungal Activity of ZnO and MgO Nanomaterials and Their Mixtures againstColletotrichum gloeosporioidesStrains from Tropical Fruit

Antifungal Activity of ZnO and MgO Nanomaterials and Their Mixtures againstColletotrichum gloeosporioidesStrains from Tropical Fruit

New nanomaterials for applications in conservation and restoration of stony materials: A review

Viability Study of a Safe Method for Health to Prepare Cement Pastes with Simultaneous Nanometric Functional Additions

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