Synthesis of Bioactive Silver Nanoparticles Using New Bacterial Strains from an Antarctic Consortium
In this study, we report on the synthesis of silver nanoparticles (AgNPs) achieved by using three bacterial strains Rhodococcus , Brevundimonas and Bacillus as reducing and capping agents, newly isolated from a consortium associated with the Antarctic marine ciliate Euplotes focardii . After incubat...
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ftdoajarticles:oai:doaj.org/article:762502f6018246a98a0c55331e07e073 2023-05-15T13:56:56+02:00 Synthesis of Bioactive Silver Nanoparticles Using New Bacterial Strains from an Antarctic Consortium Maria Sindhura John Joseph Amruthraj Nagoth Kesava Priyan Ramasamy Alessio Mancini Gabriele Giuli Cristina Miceli Sandra Pucciarelli 2022-08-01T00:00:00Z https://doi.org/10.3390/md20090558 https://doaj.org/article/762502f6018246a98a0c55331e07e073 EN eng MDPI AG https://www.mdpi.com/1660-3397/20/9/558 https://doaj.org/toc/1660-3397 doi:10.3390/md20090558 1660-3397 https://doaj.org/article/762502f6018246a98a0c55331e07e073 Marine Drugs, Vol 20, Iss 558, p 558 (2022) nanomaterials green synthesis capped nanoparticles antimicrobial activity nosocomial pathogens Biology (General) QH301-705.5 article 2022 ftdoajarticles https://doi.org/10.3390/md20090558 2022-12-30T22:01:22Z In this study, we report on the synthesis of silver nanoparticles (AgNPs) achieved by using three bacterial strains Rhodococcus , Brevundimonas and Bacillus as reducing and capping agents, newly isolated from a consortium associated with the Antarctic marine ciliate Euplotes focardii . After incubation of these bacteria with a 1 mM solution of AgNO 3 at 22 °C, AgNPs were synthesized within 24 h. Unlike Rhodococcus and Bacillus , the reduction of Ag + from AgNO 3 into Ag 0 has never been reported for a Brevundimonas strain. The maximum absorbances of these AgNPs in the UV-Vis spectra were in the range of 404 nm and 406 nm. EDAX spectra showed strong signals from the Ag atom and medium signals from C, N and O due to capping protein emissions. TEM analysis showed that the NPs were spherical and rod-shaped, with sizes in the range of 20 to 50 nm, and they were clustered, even though not in contact with one another. Besides aggregation, all the AgNPs showed significant antimicrobial activity. This biosynthesis may play a dual role: detoxification of AgNO 3 and pathogen protection against both the bacterium and ciliate. Biosynthetic AgNPs also represent a promising alternative to conventional antibiotics against common nosocomial pathogens. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Marine Drugs 20 9 558 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
nanomaterials green synthesis capped nanoparticles antimicrobial activity nosocomial pathogens Biology (General) QH301-705.5 |
spellingShingle |
nanomaterials green synthesis capped nanoparticles antimicrobial activity nosocomial pathogens Biology (General) QH301-705.5 Maria Sindhura John Joseph Amruthraj Nagoth Kesava Priyan Ramasamy Alessio Mancini Gabriele Giuli Cristina Miceli Sandra Pucciarelli Synthesis of Bioactive Silver Nanoparticles Using New Bacterial Strains from an Antarctic Consortium |
topic_facet |
nanomaterials green synthesis capped nanoparticles antimicrobial activity nosocomial pathogens Biology (General) QH301-705.5 |
description |
In this study, we report on the synthesis of silver nanoparticles (AgNPs) achieved by using three bacterial strains Rhodococcus , Brevundimonas and Bacillus as reducing and capping agents, newly isolated from a consortium associated with the Antarctic marine ciliate Euplotes focardii . After incubation of these bacteria with a 1 mM solution of AgNO 3 at 22 °C, AgNPs were synthesized within 24 h. Unlike Rhodococcus and Bacillus , the reduction of Ag + from AgNO 3 into Ag 0 has never been reported for a Brevundimonas strain. The maximum absorbances of these AgNPs in the UV-Vis spectra were in the range of 404 nm and 406 nm. EDAX spectra showed strong signals from the Ag atom and medium signals from C, N and O due to capping protein emissions. TEM analysis showed that the NPs were spherical and rod-shaped, with sizes in the range of 20 to 50 nm, and they were clustered, even though not in contact with one another. Besides aggregation, all the AgNPs showed significant antimicrobial activity. This biosynthesis may play a dual role: detoxification of AgNO 3 and pathogen protection against both the bacterium and ciliate. Biosynthetic AgNPs also represent a promising alternative to conventional antibiotics against common nosocomial pathogens. |
format |
Article in Journal/Newspaper |
author |
Maria Sindhura John Joseph Amruthraj Nagoth Kesava Priyan Ramasamy Alessio Mancini Gabriele Giuli Cristina Miceli Sandra Pucciarelli |
author_facet |
Maria Sindhura John Joseph Amruthraj Nagoth Kesava Priyan Ramasamy Alessio Mancini Gabriele Giuli Cristina Miceli Sandra Pucciarelli |
author_sort |
Maria Sindhura John |
title |
Synthesis of Bioactive Silver Nanoparticles Using New Bacterial Strains from an Antarctic Consortium |
title_short |
Synthesis of Bioactive Silver Nanoparticles Using New Bacterial Strains from an Antarctic Consortium |
title_full |
Synthesis of Bioactive Silver Nanoparticles Using New Bacterial Strains from an Antarctic Consortium |
title_fullStr |
Synthesis of Bioactive Silver Nanoparticles Using New Bacterial Strains from an Antarctic Consortium |
title_full_unstemmed |
Synthesis of Bioactive Silver Nanoparticles Using New Bacterial Strains from an Antarctic Consortium |
title_sort |
synthesis of bioactive silver nanoparticles using new bacterial strains from an antarctic consortium |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/md20090558 https://doaj.org/article/762502f6018246a98a0c55331e07e073 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Marine Drugs, Vol 20, Iss 558, p 558 (2022) |
op_relation |
https://www.mdpi.com/1660-3397/20/9/558 https://doaj.org/toc/1660-3397 doi:10.3390/md20090558 1660-3397 https://doaj.org/article/762502f6018246a98a0c55331e07e073 |
op_doi |
https://doi.org/10.3390/md20090558 |
container_title |
Marine Drugs |
container_volume |
20 |
container_issue |
9 |
container_start_page |
558 |
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1766264548304617472 |