Cargando…
Green Synthesis of Ag/Ag(2)O Nanoparticles Using Aqueous Leaf Extract of Eupatorium odoratum and Its Antimicrobial and Mosquito Larvicidal Activities
The health challenges associated with pathogens and ectoparasites highlight the need for effective control approaches. Metal nanoparticles have been proposed as highly effective tools towards combatting different microbial organisms and parasites. The present work reports the antimicrobial and larvi...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6154600/ https://www.ncbi.nlm.nih.gov/pubmed/28452944 http://dx.doi.org/10.3390/molecules22050674 |
_version_ | 1783357721316163584 |
---|---|
author | Elemike, Elias E. Onwudiwe, Damian C. Ekennia, Anthony C. Sonde, Christopher U. Ehiri, Richard C. |
author_facet | Elemike, Elias E. Onwudiwe, Damian C. Ekennia, Anthony C. Sonde, Christopher U. Ehiri, Richard C. |
author_sort | Elemike, Elias E. |
collection | PubMed |
description | The health challenges associated with pathogens and ectoparasites highlight the need for effective control approaches. Metal nanoparticles have been proposed as highly effective tools towards combatting different microbial organisms and parasites. The present work reports the antimicrobial and larvicidal potential of biosynthesized Ag/Ag(2)O nanoparticles using aqueous leaf extract of Eupatorium odoratum (EO). The constituents of the leaf extract act as both reducing and stabilizing agents. The UV-VIS spectra of the nanoparticles showed surface plasmon resonance. The particle size and shape of the nanoparticles was analysed by transmission electron microscopy (TEM). The larvicidal study was carried out using third and fourth instar Culex quinquefasciatus larvae. The mosquito larvae were exposed to varying concentrations of plant extract (EO) and the synthesized nanoparticles, and their percentage of mortality was accounted for at different time intervals of 12 h and 24 h periods of exposure. The nanoparticles were more lethal against third and fourth instars of Culex quinquefasciatus larvae at the 24 h period of exposure with lower lethal concentration values (LC50 = 95.9 ppm; LC90 = 337.5 ppm) and (LC50 = 166.4 ppm; LC90 = 438.7 ppm) compared to the plant extract (LC50 = 396.8 ppm; LC90 = 716.8 ppm and LC50 = 448.3 ppm; LC90 = 803.9 ppm, respectively). The antimicrobial properties of the nanoparticles were established against different clinically-isolated microbial strains and compared to that of the plant extract (EO) and standard antimicrobial drugs. The nanoparticles were generally more active than the plant extract against the selected microbial organisms. The Gram-negative bacterial strains Escheerichua coli and Salmonella typhi were more susceptible towards the nanoparticles compared to the Gram-positive strains and the fungal organism. |
format | Online Article Text |
id | pubmed-6154600 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-61546002018-11-13 Green Synthesis of Ag/Ag(2)O Nanoparticles Using Aqueous Leaf Extract of Eupatorium odoratum and Its Antimicrobial and Mosquito Larvicidal Activities Elemike, Elias E. Onwudiwe, Damian C. Ekennia, Anthony C. Sonde, Christopher U. Ehiri, Richard C. Molecules Article The health challenges associated with pathogens and ectoparasites highlight the need for effective control approaches. Metal nanoparticles have been proposed as highly effective tools towards combatting different microbial organisms and parasites. The present work reports the antimicrobial and larvicidal potential of biosynthesized Ag/Ag(2)O nanoparticles using aqueous leaf extract of Eupatorium odoratum (EO). The constituents of the leaf extract act as both reducing and stabilizing agents. The UV-VIS spectra of the nanoparticles showed surface plasmon resonance. The particle size and shape of the nanoparticles was analysed by transmission electron microscopy (TEM). The larvicidal study was carried out using third and fourth instar Culex quinquefasciatus larvae. The mosquito larvae were exposed to varying concentrations of plant extract (EO) and the synthesized nanoparticles, and their percentage of mortality was accounted for at different time intervals of 12 h and 24 h periods of exposure. The nanoparticles were more lethal against third and fourth instars of Culex quinquefasciatus larvae at the 24 h period of exposure with lower lethal concentration values (LC50 = 95.9 ppm; LC90 = 337.5 ppm) and (LC50 = 166.4 ppm; LC90 = 438.7 ppm) compared to the plant extract (LC50 = 396.8 ppm; LC90 = 716.8 ppm and LC50 = 448.3 ppm; LC90 = 803.9 ppm, respectively). The antimicrobial properties of the nanoparticles were established against different clinically-isolated microbial strains and compared to that of the plant extract (EO) and standard antimicrobial drugs. The nanoparticles were generally more active than the plant extract against the selected microbial organisms. The Gram-negative bacterial strains Escheerichua coli and Salmonella typhi were more susceptible towards the nanoparticles compared to the Gram-positive strains and the fungal organism. MDPI 2017-04-28 /pmc/articles/PMC6154600/ /pubmed/28452944 http://dx.doi.org/10.3390/molecules22050674 Text en © 2017 by the authors. 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/). |
spellingShingle | Article Elemike, Elias E. Onwudiwe, Damian C. Ekennia, Anthony C. Sonde, Christopher U. Ehiri, Richard C. Green Synthesis of Ag/Ag(2)O Nanoparticles Using Aqueous Leaf Extract of Eupatorium odoratum and Its Antimicrobial and Mosquito Larvicidal Activities |
title | Green Synthesis of Ag/Ag(2)O Nanoparticles Using Aqueous Leaf Extract of Eupatorium odoratum and Its Antimicrobial and Mosquito Larvicidal Activities |
title_full | Green Synthesis of Ag/Ag(2)O Nanoparticles Using Aqueous Leaf Extract of Eupatorium odoratum and Its Antimicrobial and Mosquito Larvicidal Activities |
title_fullStr | Green Synthesis of Ag/Ag(2)O Nanoparticles Using Aqueous Leaf Extract of Eupatorium odoratum and Its Antimicrobial and Mosquito Larvicidal Activities |
title_full_unstemmed | Green Synthesis of Ag/Ag(2)O Nanoparticles Using Aqueous Leaf Extract of Eupatorium odoratum and Its Antimicrobial and Mosquito Larvicidal Activities |
title_short | Green Synthesis of Ag/Ag(2)O Nanoparticles Using Aqueous Leaf Extract of Eupatorium odoratum and Its Antimicrobial and Mosquito Larvicidal Activities |
title_sort | green synthesis of ag/ag(2)o nanoparticles using aqueous leaf extract of eupatorium odoratum and its antimicrobial and mosquito larvicidal activities |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6154600/ https://www.ncbi.nlm.nih.gov/pubmed/28452944 http://dx.doi.org/10.3390/molecules22050674 |
work_keys_str_mv | AT elemikeeliase greensynthesisofagag2onanoparticlesusingaqueousleafextractofeupatoriumodoratumanditsantimicrobialandmosquitolarvicidalactivities AT onwudiwedamianc greensynthesisofagag2onanoparticlesusingaqueousleafextractofeupatoriumodoratumanditsantimicrobialandmosquitolarvicidalactivities AT ekenniaanthonyc greensynthesisofagag2onanoparticlesusingaqueousleafextractofeupatoriumodoratumanditsantimicrobialandmosquitolarvicidalactivities AT sondechristopheru greensynthesisofagag2onanoparticlesusingaqueousleafextractofeupatoriumodoratumanditsantimicrobialandmosquitolarvicidalactivities AT ehiririchardc greensynthesisofagag2onanoparticlesusingaqueousleafextractofeupatoriumodoratumanditsantimicrobialandmosquitolarvicidalactivities |