Antibacterial and Antioxidant Activity of Protein Capped Silver and Gold Nanoparticles Synthesized with Escherichia coli

2012 ◽  
Vol 8 (1) ◽  
pp. 140-148 ◽  
Author(s):  
S. Veeraapandian ◽  
Shilpa N. Sawant ◽  
Mukesh Doble
Keyword(s):  
Escherichia Coli ◽  
Antioxidant Activity ◽  
Gold Nanoparticles ◽  
Silver And Gold Nanoparticles ◽  
Antibacterial And Antioxidant Activity

ANTICANDIDAL AND ANTIOXIDANT ACTIVITY OF SILVER AND GOLD NANOPARTICLES BIOSYNTHESISED USING MATURED ARECA NUT HUSK EXTRACT

2021 ◽  
Vol 13 (1) ◽  
pp. 1
Author(s):  
Chandrayan Vaman Rao ◽  
Sneha Nayak ◽  
Chaitra Ganappa Ramakkanavar ◽  
Anusha Kunnathuli Jagadeesh ◽  
Priyanaka Hemba ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Gold Nanoparticles ◽  
Areca Nut ◽  
Silver And Gold Nanoparticles

Synthesis of silver and gold nanoparticles by Sargassum muticum biomolecules and evaluation of their antioxidant activity and antibacterial properties

2020 ◽  
Vol 10 (4) ◽  
pp. 317-330
Author(s):  
N. González-Ballesteros ◽  
M. C. Rodríguez-Argüelles ◽  
M. Lastra-Valdor ◽  
G. González-Mediero ◽  
S. Rey-Cao ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Gold Nanoparticles ◽  
Antibacterial Properties ◽  
Sargassum Muticum ◽  
Silver And Gold Nanoparticles

scholarly journals THE GREEN SYNTHESIS, CHARACTERIZATION AND EVALUATION OF ANTIOXIDANT AND ANTIMICROBIAL EFFICACY OF SILVER&GOLD NANOSPHERES SYNTHESIZED FROM WHEAT BRAN

2016 ◽  
Vol 9 (6) ◽  
pp. 103 ◽  
Author(s):  
Sonika Gupta
Keyword(s):  
Antioxidant Activity ◽  
Gold Nanoparticles ◽  
Wheat Bran ◽  
Antimicrobial Efficacy ◽  
Commercial Application ◽  
Diffusion Method ◽  
Gold Nanospheres ◽  
Silver And Gold Nanoparticles ◽  
Uv Visible ◽  
Wheat Bran Extract

AbstractIn the present scenario, biogenic production of gold and silver nanoparticles has evoked considerable interest in terms of their diverse biomedi0058cal applications because of their extremely small size and large surface to volume ratio. Hence, the aims of the current study were to use plant extract for the biosynthesis of silver and gold nanoparticles and to evaluate their antibacterial and antioxidant activity in vitro. First, aqueous silver nitrate and chloroauric acid solutions have been treated with Wheat bran extract;reduction of the silver and chloroaurate ions is witnessed resulting in the formation of highly stable silver and gold nanoparticles in solution. Characterization of synthesized silver and gold nanospheres is made using UV-visible,SEMandTEManalysis, indicated that they ranged from 30 to 55 nm and 45 to 70 nm in size respectively.  The free radical scavenging potential has been investigated using DPPH assay, examined by a UV-visible spectrophotometer and found that AgNPs AuNPs exhibited exceptional potential- compared to wheat bran extract alone. Antimicrobial efficacy against dental disease causing pathogens - Staphylococcus aureus (MTCC 7443) and Streptococcus mutans (MTCC 497) was tested using agar diffusion method. The synthesized AgNPs and AuNPs efficiently inhibited the growth of respective pathogens. It could be concluded that these nanospheres can be act as potent antioxidant and antimicrobial agents for commercial application.                                                                                                  Keywords: AgNPS, AuNPS, Wheat Bran, DPPH Scavenging Assay, Antioxidant Activity, Antimicrobial Activity, SEM, TEM     

scholarly journals Antibacterial and antibiofilm effect of silver and gold nanoparticles in Uropathogenic Escherichia coli

2021 ◽  
Vol 27 (2) ◽  
pp. 67-72
Author(s):  
Rini Purbowati ◽  
Sugiharto Sugiharto ◽  
Agusniar Furkani Listyawati ◽  
Masfufatun Masfufatun ◽  
Lusiani Tjandra ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Gold Nanoparticles ◽  
Nosocomial Infections ◽  
Infectious Agent ◽  
Microtiter Plate ◽  
Uropathogenic Escherichia Coli ◽  
Antibiofilm Activity ◽  
Infectious Agents ◽  
Silver And Gold Nanoparticles ◽  
Life Threatening

Nosocomial infections of the urinary tract are the most common nosocomial infections. Infectious diseases currently pose a life threatening due to the increasing phenomenon of infectious agent resistance. One of the factors known to cause resistance to broad-spectrum antimicrobials agent is the susceptibility to biofilm formation. The use of silver nanoparticles (NPs) is now regarded as one of the most promising strategies to target infections associated with biofilms. This study aims to determine the application of nanotechnology in the form of metal nanoparticles in targeting the formation of biofilms on infectious agents. The antibacterial and antibiofilm activity test was performed on a 96-well microtiter plate on uropathogenic Escherichia coli (UPEC) at concentrations of 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100 ppm. The results showed the addition of silver and gold nanoparticles at different concentrations affected and inhibited the growth of UPEC and prevented the formation of biofilms, as indicated by a decrease in the OD value. In conclusion, silver and gold nanoparticles have antibacterial and antibiofilm effects on UPEC.

Anticandidal and antioxidant activity of silver and gold nanoparticles biosynthesised using matured areca nut husk extract

2021 ◽  
Vol 13 (1) ◽  
pp. 21
Author(s):  
Bhavana Pradeep ◽  
Priyanka Hemba ◽  
Anusha Kunnathuli Jagadeesh ◽  
Chaitra Ganappa Ramakkanavar ◽  
Sneha Nayak ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Gold Nanoparticles ◽  
Areca Nut ◽  
Silver And Gold Nanoparticles

Antibacterial and Anti-Biofilm Biosynthesised Silver and Gold Nanoparticles for Medical Applications: Mechanism of Action, Toxicity and Current Status

2020 ◽  
Vol 17 (2) ◽  
pp. 88-100 ◽  
Author(s):  
Sundos Suleman Ismail Abdalla ◽  
Haliza Katas ◽  
Fazren Azmi ◽  
Mohd Fauzi Mh Busra
Keyword(s):  
Gold Nanoparticles ◽  
Synthesis Method ◽  
Chemical Characterization ◽  
Current Status ◽  
Silver And Gold Nanoparticles ◽  
Physical And Chemical Characterization ◽  
Biosynthesized Agnps ◽  
Physical And Chemical ◽  
Insight Into ◽  
Bio Synthesis

Fast progress in nanoscience and nanotechnology has contributed to the way in which people diagnose, combat, and overcome various diseases differently from the conventional methods. Metal nanoparticles, mainly silver and gold nanoparticles (AgNPs and AuNPs, respectively), are currently developed for many applications in the medical and pharmaceutical area including as antibacterial, antibiofilm as well as anti-leshmanial agents, drug delivery systems, diagnostics tools, as well as being included in personal care products and cosmetics. In this review, the preparation of AgNPs and AuNPs using different methods is discussed, particularly the green or bio- synthesis method as well as common methods used for their physical and chemical characterization. In addition, the mechanisms of the antimicrobial and anti-biofilm activity of AgNPs and AuNPs are discussed, along with the toxicity of both nanoparticles. The review will provide insight into the potential of biosynthesized AgNPs and AuNPs as antimicrobial nanomaterial agents for future use.

Stabilization of Silver and Gold Nanoparticles: Preservation and Improvement of Plasmonic Functionalities

2018 ◽  
Vol 119 (1) ◽  
pp. 664-699 ◽  
Author(s):  
Hyunho Kang ◽  
Joseph T. Buchman ◽  
Rebeca S. Rodriguez ◽  
Hattie L. Ring ◽  
Jiayi He ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Silver And Gold Nanoparticles

Interaction of Differently Sized, Shaped, and Functionalized Silver and Gold Nanoparticles with Glycosylated versus Nonglycosylated Transferrin

2021 ◽  
Author(s):  
Rinea Barbir ◽  
Rafael Ramírez Jiménez ◽  
Rafael Martín-Rapún ◽  
Vida Strasser ◽  
Darija Domazet Jurašin ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Silver And Gold Nanoparticles
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