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      Environmentally-Friendly Green Approach for the Production of Zinc Oxide Nanoparticles and Their Anti-Fungal, Ovicidal, and Larvicidal Properties

      research-article
      Author(s): * ,
      Publication date (Electronic):
      Journal: Nanomaterials
      Publisher: MDPI
      Keywords: Scadoxus multiflorus, leaf, ZnO NPs, larvicidal, ovicidal, anti-fungal

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          Abstract

          Green synthesis of nanoparticles can be an important alternative compared to conventional physio-chemical synthesis. We utilized Scadoxus multiflorus leaf powder aqueous extract as a capping and stabilizing agent for the synthesis of pure zinc oxide nanoparticles (ZnO NPs). Further, the synthesized ZnO NPs were subjected to various characterization techniques. Transmission electron microscope (TEM) analysis showed an irregular spherical shape, with an average particle size of 31 ± 2 nm. Furthermore, the synthesized ZnO NPs were tested against Aedes aegypti larvae and eggs, giving significant LC 50 value of 34.04 ppm. Ovicidal activity resulted in a higher percentage mortality rate of 96.4 ± 0.24 at 120 ppm with LC 50 value of 32.73 ppm. Anti-fungal studies were also conducted for ZnO NPs against Aspergillus niger and Aspergillus flavus, which demonstrated a higher inhibition rate for Aspergillus flavus compared to Aspergillus niger.

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          Investigation into the antibacterial behaviour of suspensions of ZnO nanoparticles (ZnO nanofluids)

          Lingling Zhang, Yunhong Jiang, Yulong Ding … (2007)
          Article 0 comments Cited 301 times – based on 0 reviews     Review now
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            Dispersal of the dengue vector Aedes aegypti within and between rural communities.

            Laura C. Harrington, Thomas W. Scott, Kriangkrai Lerdthusnee … (2005)
            Knowledge of mosquito dispersal is critical for vector-borne disease control and prevention strategies and for understanding population structure and pathogen dissemination. We determined Aedes aegypti flight range and dispersal patterns from 21 mark-release-recapture experiments conducted over 11 years (1991-2002) in Puerto Rico and Thailand. Dispersal was compared by release location, sex, age, season, and village. For all experiments, the majority of mosquitoes were collected from their release house or adjacent house. Inter-village movement was detected rarely, with a few mosquitoes moving a maximum of 512 meters from one Thai village to the next. Average dispersal distances were similar for males and females and females released indoors versus outdoors. The movement of Ae. aegypti was not influenced by season or age, but differed by village. Results demonstrate that adult Ae. aegypti disperse relatively short distances, suggesting that people rather than mosquitoes are the primary mode of dengue virus dissemination within and among communities.
            Article 0 comments Cited 236 times – based on 0 reviews     Review now
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              Antifungal activity of zinc oxide nanoparticles against Botrytis cinerea and Penicillium expansum.

              Oluwaseun Mustapha, L He, Simon M Lin … (2011)
              Antifungal activities of zinc oxide nanoparticles (ZnO NPs) and their mode of action against two postharvest pathogenic fungi (Botrytis cinerea and Penicillium expansum) were investigated in this study. ZnO NPs with sizes of 70 ± 15 nm and concentrations of 0, 3, 6 and 12 mmol l(-1) were used. Traditional microbiological plating, scanning electron microscopy (SEM), and Raman spectroscopy were used to study antifungal activities of ZnO NPs and to characterize the changes in morphology and cellular compositions of fungal hyphae treated with ZnO NPs. Results show that ZnO NPs at concentrations greater than 3 mmol l(-1) can significantly inhibit the growth of B. cinerea and P. expansum. P. expansum was more sensitive to the treatment with ZnO NPs than B. cinerea. SEM images and Raman spectra indicate two different antifungal activities of ZnO NPs against B. cinerea and P. expansum. ZnO NPs inhibited the growth of B. cinerea by affecting cellular functions, which caused deformation in fungal hyphae. In comparison, ZnO NPs prevented the development of conidiophores and conidia of P. expansum, which eventually led to the death of fungal hyphae. These results suggest that ZnO NPs could be used as an effective fungicide in agricultural and food safety applications. Copyright © 2010 Elsevier GmbH. All rights reserved.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Nanomaterials (Basel)
                Journal ID (iso-abbrev): Nanomaterials (Basel)
                Journal ID (publisher-id): nanomaterials
                Title: Nanomaterials
                Publisher: MDPI
                ISSN (Electronic): 2079-4991
                Publication date (Electronic): 06 July 2018
                Publication date Collection: July 2018
                Volume: 8
                Issue: 7
                Electronic Location Identifier: 500
                Affiliations
                Addiriyah Chair for Environmental Studies, Department of Botany and Microbiology, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia; mvalanarasu@ 123456ksu.edu.sa
                Author notes
                [* ]Correspondence: naldhabi@ 123456ksu.edu.sa ; Tel./Fax: +966-11-4697204
                Article
                Publisher ID: nanomaterials-08-00500
                DOI: 10.3390/nano8070500
                PMC ID: 6071098
                PubMed ID: 29986435
                SO-VID: d46ee03b-8ed6-4998-9380-4e075eb981b5
                Copyright © © 2018 by the authors.
                License:

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                Date received : 09 May 2018
                Date accepted : 02 July 2018
                Categories
                Subject: Article

                Keywords: scadoxus multiflorus,leaf,zno nps,larvicidal,ovicidal,anti-fungal
                Data availability:
                Keywords: scadoxus multiflorus, leaf, zno nps, larvicidal, ovicidal, anti-fungal

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