Encapsulation and release of Beauveria bassiana from alginate–bentonite nanocomposite

Batista, Diogo; Oliveira, I. N. de; Ribeiro, A. R. B.; Fonseca, Eduardo J.S.; Santos-Magalhães, Nereide Stela; Sena-Filho, José G.; Teodoro, Adenir Vieira; Grillo, Luciano Aparecido Meireles; Almeida, Ricardo Santos de; Dornelas, Camila Braga

doi:10.1039/c7ra02185b

Cited by 34 publications

(21 citation statements)

References 40 publications

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“…It showed that crystallinity of SiO 2 turned to amorphous nature [88,96,102] as similar observation made by us in our previous work [93,94] . Other diffraction peaks of bentonite observe at 2θ=19.9 ° , 26.6 ° , 28.58 ° , 36.0 ° , 42.5 ° and 61.7 ° [103–106] . The peaks at 2θ=20.91 ° , 26.6 ° , 36.0 ° and 42.5 ° reflect that bentonite contains ample amount of quartz and no peak has seen at 31.30° represent for cristobalite [103] .…”

Section: Resultssupporting

confidence: 85%

Fe(III)/Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones

Chopda

Dave

2020

ChemistrySelect

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Fe(III) immobilized over natural bentonite (bent) using the impregnation method. Prepared catalysts were well characterized by XRD, FT-IR and FeSEM. The catalytic activity of three catalysts 10, 20 and 30 % Fe(III)/bent evaluated for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones known as Biginelli reaction. The catalyst 30 % Fe(III)/bent exhibited a high yield of the product towards the synthesis of a variety of dihydropyrimidones (DHPMs). The high yield of dihydropyrimidone (DHPM) was obtained in model reaction in ethanol, acetonitrile, DMF and solvent-free condition. The reusability test indicated that 6 % of yield of product decreased after 5 th cycle. Highlights * 10, 20 and 30 % Fe(III) were supported over bentonite clay. The catalysts are well characterized by (XRD), FT-IR, FeSEM and EDS. All charactization method showed that Fe supported over bentonite. * The used catalysts were screened for Biginelli reaction for synthesis dihydropyrimidones. * 30 % Fe(III)/bent exhibited high yield of product towards model Biginelli reaction between benzaldehyde, ethylacetoacetate and urea in ethanol. * 30 % Fe(III)/bent exhibited high yield of product in CH 3 CN, DMF and solvent free-condition. * The catalyst 30 % Fe(III)/bent applied for synthesis of variety of dihydropyrimodone in good yield in CH 3 CN. * Reusability studies show that no great decline in activity after 5 th cycle.

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Section: Resultssupporting

confidence: 85%

Fe(III)/Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones

Chopda

Dave

2020

ChemistrySelect

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“…After encapsulation, it is important to evaluate the release kinetics of the compound and for this a template was used as described by Batista et al (2017). The release kinetics assay showed us how the fungus release from the calcium alginate microparticles in the presence or absence of ultraviolet light.…”

Section: Discussionmentioning

confidence: 99%

“…The fungus had a larger release area when encapsulated and exposed to UV, this happened due to the fact that the microparticle system used in this work is effective in protection, especially in dry microparicles. Batista et al (2017) evaluated the growth areas of the Beauveria bassiana fungus encapsulated in alginate-bentonite microparticles dried using different air flow and lyophilization processes. The results showed that the light emission was directly related to the development of the organism and that the growth area was larger when the microparticles were dried by the air flow method.…”

Section: Discussionmentioning

confidence: 99%

“…The spore release profile was determined using density measurements of the samples at different growth stages, starting after hydration of the microparticles (Batista et al, 2017). The microparticles were placed in PDA culture medium, where they were kept until full development of the fungus.…”

Section: Release Kineticsmentioning

confidence: 99%

“…It was also important to evaluate the releases kinetics of the microcapsule contents. For this, a template was used as described by Batista et al (2017). The results of the growth kinetics assays for the fungus encapsulated in the wet and dry calcium alginate microparticles, as well as the unencapsulated fungus, are shown in Figure 5.…”

Section: Release Kineticsmentioning

confidence: 99%

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Encapsulation of Trichoderma harzianum Preserves Enzymatic Activity and Enhances the Potential for Biological Control

Maruyama

Bilesky-José

Lima

et al. 2020

Front. Bioeng. Biotechnol.

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Trichoderma harzianum is a biological control agent used against phytopathogens and biostimulation in agriculture. However, its efficacy can be affected by biotic and abiotic factors, and microencapsulation has been used to maximize the efficacy. The objective was to develop polymeric microparticles to encapsulate T. harzianum, to perform physicochemical characterization to evaluate its stability, to evaluate effects on the soil microbiota, antifungal activity in vitro and enzymatic activity. Size distribution of wet and dry microparticles was 2000 and 800 µm, respectively. Scanning electron microscopy showed spherical morphology and encapsulation of T. harzianum. Photostability assays showed that encapsulation protected the fungus against ultraviolet radiation. The evaluation of the microbiota showed that the proportion of denitrifying bacteria increased when compared to the control. The T. harzianum encapsulation showed an improvement in the chitinolytic and cellulosic activity. In vitro tests showed that encapsulated fungus were able to provide a greater control of S. sclerotiorum.

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Encapsulation Technologies of Plant Growth‐Promoting Microorganisms and Microbial Biological Control Agents Against Plant Pathogenic Organisms

Marcial-Coba

Soria‐Delgado

Yánez‐Altuna

2021

Annual Plant Reviews Online

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As a function of the global necessity to reduce or replace the use of chemical fertilisers and pesticides, due to their toxicity, the formulation of microbial inoculants has been suggested as an environmentally friendly alternative for maintaining crop production at economically sustainable levels. In this connection, the microencapsulation of beneficial soil‐borne microorganisms is conceived as a strategy to improve the inoculant's efficiency, in terms of viability and functionality. In this article, we describe the most widely applied microencapsulation techniques, including the mechanisms and wall materials involved, as well as the advantages and shortcomings of using different encapsulation technologies. Moreover, the desiccation technologies used as a tool to extend the shelf‐life of immobilised microbes are also explained. Finally, the outcomes of various, relatively recent studies regarding the encapsulation of plant growth‐promoting microorganisms and biocontrol agents, including bacteriophages, are discussed. This article may contribute to the design of microbial inoculant delivery strategies, aiming to increase crop production and to reduce the utilisation of chemical fertilisers and pesticides.

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Encapsulation and release of Beauveria bassiana from alginate–bentonite nanocomposite

Abstract: The present manuscript brings new information regarding the advantages of the encapsulation of B. bassiana in alginate matrices containing bentonite, such as conidia protection, swelling degree, and release kinetics.

Cited by 34 publications

References 40 publications

Fe(III)/Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones

Fe(III)/Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones

Encapsulation of Trichoderma harzianum Preserves Enzymatic Activity and Enhances the Potential for Biological Control

Encapsulation Technologies of Plant Growth‐Promoting Microorganisms and Microbial Biological Control Agents Against Plant Pathogenic Organisms

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