A direct method for the preparation of glycolipid–metal nanoparticle conjugates: sophorolipids as reducing and capping agents for the synthesis of water re-dispersible silver nanoparticles and their antibacterial activity

2009 ◽  
Vol 33 (3) ◽  
pp. 646-652 ◽  
Author(s):  
Sanjay Singh ◽  
Pitamber Patel ◽  
Swarna Jaiswal ◽  
A. A. Prabhune ◽  
C. V. Ramana ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Direct Method ◽  
Metal Nanoparticle ◽  
Capping Agents ◽  
A Direct Method

scholarly journals Biosynthesis and Antibacterial Activity of Silver Nanoparticles Using Yeast Extract as Reducing and Capping Agents

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Mengjun Shu ◽  
Fengjiao He ◽  
Zhaohui Li ◽  
Xingzhong Zhu ◽  
Yujie Ma ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Yeast Extract ◽  
Capping Agents

Role of capping agents in controlling silver nanoparticles size, antibacterial activity and potential application as optical hydrogen peroxide sensor

RSC Advances ◽  
2016 ◽  
Vol 6 (42) ◽  
pp. 36171-36179 ◽  
Author(s):  
B. Ajitha ◽  
Y. Ashok Kumar Reddy ◽  
P. Sreedhara Reddy ◽  
Hwan-Jin Jeon ◽  
Chi Won Ahn
Keyword(s):  
Hydrogen Peroxide ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Catalytic Reaction ◽  
Potential Application ◽  
Capping Agents ◽  
Optical Absorbance ◽  
Hydrogen Peroxide Sensor ◽  
Absorbance Spectra

Catalytic reaction between PVA-capped AgNPs and hydrogen peroxide, and the corresponding LSPR optical absorbance spectra as a function of time.

Antibacterial Activity of Biodegradable Particles based on Chitosan Containing Colloidal Silver

2020 ◽  
Vol 36 (4) ◽  
pp. 87-93
Author(s):  
V.Yu. Reshetova ◽  
A.F. Krivoshchepov ◽  
I.A. Butorova ◽  
N.B. Feldman ◽  
S.V. Lutsenko ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Polymer Matrix ◽  
Adipic Acid ◽  
Antibacterial Effect ◽  
Academic Excellence ◽  
Colloidal Silver ◽  
Scanning Electron Microscopy Data ◽  
Covalent Bonds ◽  
Agar Diffusion Test

Chitosan beads with colloidal silver nanoparticles inclued in the polymer matrix have been obtained by the introduction of chitosan into an acidified nanosilver sol. Dual interconnection of drops of the resulting solution was then carried out by ionotropic gelation at the first stage and covalent crosslinking of the polymer matrix with adipic acid at the second stage. The surface morphology of the obtained beads was studied by scanning electron microscopy. Data of Fourier transform IR spectroscopy confirmed the formation of covalent bonds between chitosan and adipic acid. The antibacterial activity of obtained beads against S. aureus and E. coli was evaluated using agar diffusion test. It was shown that the сhitosan beads modified with nanostructured silver exhibited an antibacterial effect against the tested strains, and they can be used as a basis for creating biodegradable wound healing dressings with a prolonged antibacterial effect. chitosan, silver nanoparticles, antibacterial activity, wound dressings This work was supported by the "Russian Academic Excellence Project 5-100". The study was carried out with the financial support of the Russian Foundation for Basic Research in the framework of the Scientific Project no. 18-29-18039.

Green Synthesis of Silver Nanoparticles Using Artocarpus hirsutus Seed Extract and its Antibacterial Activity

2020 ◽  
Vol 21 (10) ◽  
pp. 980-989
Author(s):  
Sampath Shobana ◽  
Sunderam Veena ◽  
S.S.M. Sameer ◽  
K. Swarnalakshmi ◽  
L.A. Vishal
Keyword(s):  
Silver Nanoparticles ◽  
Cell Wall ◽  
Antibacterial Activity ◽  
Listeria Monocytogenes ◽  
Nanoparticle Synthesis ◽  
Enterobacter Aerogenes ◽  
Seed Extract ◽  
Diffusion Method ◽  
Multi Drug Resistance ◽  
Gastrointestinal Bacteria

Aims: To evaluate the antibacterial activity of Artocarpus hirsutus mediated seed extract for nanoparticle synthesis. Background: Gastrointestinal bacteria are known for causing deadly infections in humans. They also possess multi-drug resistance and interfere with clinical treatments. Applied nanotechnology has been known to combat such infectious agents with little interference from their special attributes. Here we synthesize silver nanoparticles from Artocarpus hirsutus seed extract against two gastro-intestinal bacterial species: Enterobacter aerogenes and Listeria monocytogenes. Objective: To collect, dry, and process seeds of Artocarpus hirsutus for nanoparticle synthesis. To evaluate the morphological interaction of silver nanoparticles with bacteria. Methods: Artocarpus hirsutus seeds were collected and processed and further silver nanoparticles were synthesized by the co-precipitation method. The synthesized nanoparticles were characterized using XRD, UV, FTIR, and SEM. These nanoparticles were employed to study the antibacterial activity of nanoparticles against Enterobacter aerogenes and Listeria monocytogenes using well diffusion method. Further, morphological interaction of silver nanoparticles on bacteria was studied using SEM. Result: Silver nanoparticles were synthesized using Artocarpus hirsutus seed extract and characterization studies confirmed that silver nanoparticles were spherical in shape with 25-40 nm size. Antibacterial study exhibited better activity against Enterobacter aerogenes with a maximum zone of inhibition than on Listeria monocytogenes. SEM micrographs indicated that Enterobacter aerogenes bacteria were more susceptible to silver nanoparticles due to the absence of cell wall. Also, the size and charge of silver nanoparticles enable easy penetration of the bacterial cell wall. Conclusion: In this study, silver nanoparticles were synthesized using the seed extract of Artocarpus hirsutus for the first time exploiting the fact that Moraceae species have high phytonutrient content which aided in nanoparticle synthesis. This nanoparticle can be employed for large scale synthesis which when coupled with the pharmaceutical industry can be used to overcome the problems associated with conventional antibiotics to treat gastrointestinal bacteria.

Antibacterial activity of garlic extract and silver Nanoparticles: an in vitro analysis

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
SHREYASHI M ◽  
SULAGNA D ◽  
SANKARI D ◽  
THIRUMURUGAN D ◽  
INFANT SANTHOSE B ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Garlic Extract ◽  
Vitro Analysis ◽  
In Vitro Analysis
Sign in / Sign up

Export Citation Format

Share Document