Complexation of copper(II) with chitosan nanogels: Toward control of microbial growth

Brunel, Fabrice; Gueddari, Nour Eddine El; Moerschbacher, Bruno M.

doi:10.1016/j.carbpol.2012.10.025

Cited by 209 publications

(86 citation statements)

References 39 publications

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“…Brunel et al [52] report the antimicrobial activity of chitosan in their work by dissolving the molecule in water, similar to the one performed in this work.…”

Section: Journal Of Food Qualitysupporting

confidence: 65%

Chitosan/Cellulose Nanofibril Nanocomposite and Its Effect on Quality of Coated Strawberries

Resende

Gonçalves²,

Reis

et al. 2018

Journal of Food Quality

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e aim of this study was to develop a chitosan/cellulose nano bril (CNF) nanocomposite and evaluate its e ect on strawberry's postharvest quality after coating. From the results of color, thickness, and scanning electron microscopy (SEM) and permeability to water vapor analyses, the best lm formulation for coating strawberries was determined. ree coating formulations were prepared: 1% chitosan, 1% chitosan + 3% CNF, and 1% chitosan + 5% CNF. e strawberries were immersed in the lmogenic solutions and kept under cold storage (1 ± 1°C). e color of the lm was not a ected by increased concentration of cellulose nano brils; however, the thickness and water vapor permeability were a ected by the CNF addition. e coating with the highest CNF concentration performed better in reducing fruit mass and rmness loss. e color was positively in uenced by the addition of the coating, regardless of formulation, as well as soluble solid content, PG enzymatic activity, and the fruit appearance. e pH and titratable acidity showed no signi cant di erence among treatments. It was observed that the vitamin C, phenolic compounds, and anthocyanin content, as well as the PAL activity and the antioxidant activity (except for % protection), were a ected by chitosan coating, however not by the addition of CNFs.

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“…Brunel et al [52] report the antimicrobial activity of chitosan in their work by dissolving the molecule in water, similar to the one performed in this work.…”

Section: Journal Of Food Qualitysupporting

confidence: 65%

Chitosan/Cellulose Nanofibril Nanocomposite and Its Effect on Quality of Coated Strawberries

Resende

Gonçalves²,

Reis

et al. 2018

Journal of Food Quality

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“…Since most fungi tend to reduce the pH of their surrounding environment, therefore the release of copper (II) can be easily triggered by the growth of the pathogen. A strong synergistic effect between chitosan and copper in inhibiting the growth of Fusarium graminearum has been reported (Brunel et al 2013 ).…”

Section: Nanogelsmentioning

confidence: 98%

“…The effi cacy of a nanogel formulation of the essential oil of Lippia sidoides has also been reported to be better than free oil. Brunel et al ( 2013 ) suggested the use of pure chitosan nanogels to improve the performance of antifungal treatments based on copper. The advantages of using a nanogel over a solution include easier handling, improved distribution on the leaves and the long-term release of copper on to leaves or into the soil without comparing its antifungal properties.…”

Section: Nanogelsmentioning

confidence: 99%

Understanding the Role of Nanomaterials in Agriculture

Dwivedi

Saquib

Al‐Khedhairy

et al. 2016

Microbial Inoculants in Sustainable Agricultural Productivity

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Nanotechnology offers immense opportunities for improvement in the quality of life through applications in agriculture and the food systems. Development of nanotechnology-based novel agro-products, viz., nanosensors, nano-fertilizers, nano-pesticides and nanoformulations of biocontrol agents, is currently a subject of intense investigation. A variety of nanomaterials has been recommended for use in agriculture, in order to help reduce the consumption of agrochemicals by use of smart delivery systems, minimize the nutrient losses and increase the yield through optimized water and nutrients management. Nanotechnology-derived devices have also been explored in the areas of plant breeding and genetics. Additionally, the agricultural products and/or by-products can be utilized as a source for developing bio-nanocomposites. Nevertheless, the potential advantages of nanotechnology applications in the agricultural sector are still marginal, and have not been commercialized to a signifi cant extent, as compared to other industrial sectors. Researches in the area of agricultural nanotechnology are being extensively pursued in quest for the solutions to the agricultural and environmental challenges, such as sustainability, increased productivity, disease management and crop protection through innovative techniques for monitoring, assessing and controlling the agricultural practices. This chapter provides a basic knowledge about the role of nanotechnology in developing sustainable agriculture and environment, and eventually in the welfare of human society, at large, in the near future.

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“…In addition, acidic environment created by the fungi in infected plant provokes the break-up of nanostructure and releases Cu ions [26]. Chitosan-Cu nanonetwork is evident through a higher Cu accumulation in porous area which supports the ion-exchange resins and surface chelating mechanism [12].…”

Section: Antifungal Activity Assaymentioning

confidence: 99%

“…This could be due to the high density at which the solution was able to saturate and cohere to fungal hyphae and to deactivate plant pathogenic fungi. The combined copper-chitosan colloids are used as a new generation of copper-based bio-pesticides [26]. Cu-chitosan has proven high antifungal activity by inhibiting spore and mycelium formation of A. alternate, R. solani and Macrophomina phaseolina [10,12].…”

Section: Antifungal Activity Assaymentioning

confidence: 99%

Synthesis and characterization of chitosan–copper nanocomposites and their fungicidal activity against two sclerotia-forming plant pathogenic fungi

et al. 2017

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In this report, the metal-vapor synthesis (MVS) was used for the preparation of copper nanoparticles which was then used for the preparation of chitosan-copper nanocomposite. The antifungal activity of Cu@Chit NCs against two sclerotium-forming plant pathogenic fungi Sclerotium rolfsii (S. rolfsii) and Rhizoctonia solani (R. solani) AG-4 was evaluated in vitro and their effects on hyphal morphology, and sclerotia formation were observed for the first time. The NCs were prepared through impregnation of chitosan with colloid solution of copper nanoparticles in organic solvent (acetone or toluene). Transmission electron microscopy shows that the particles have predominantly spherical form, polydisperse character, the mean diameter about 2-3 nm and a rather uniform distribution in the chitosan matrice. Analysis of the small angle scattering curves suggests that the copper particles in the NCs with the size of B2 nm are mostly located in the chitosan pores with the same size. The effect of Cu@Chit NCs on fungal growth reveals some significant inhibitory activity against two tested fungi. The highest level of inhibition against S. rolfsii and R. solani AG-4 was observed using the high concentrations of Cu@Chit NC prepared using acetone as a solvent. A loss of the cytoplasm content, cytoplasmic coagulation, irregular shape of mycelia, or destruction in the hyphae was confirmed. The experiments demonstrate that the Cu@Chit NC synthesized via MVS using acetone was more effective than that of toluene in inhibiting fungal hyphae growth against R. solani AG-4 and S. rolfsii. The results show that the Cu@Chit NCs are fungicidal against both the tested fungus at high concentrations and the fungicidal or fungistatic activity is dependent on the tested fungus species.

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Complexation of copper(II) with chitosan nanogels: Toward control of microbial growth

Cited by 209 publications

References 39 publications

Chitosan/Cellulose Nanofibril Nanocomposite and Its Effect on Quality of Coated Strawberries

Chitosan/Cellulose Nanofibril Nanocomposite and Its Effect on Quality of Coated Strawberries

Understanding the Role of Nanomaterials in Agriculture

Synthesis and characterization of chitosan–copper nanocomposites and their fungicidal activity against two sclerotia-forming plant pathogenic fungi

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