scholarly journals Single Pot Synthesis of Gellan Gum Coated Silver Nanoparticles and its Antimicrobial Activity

2021 ◽  
Vol 33 (9) ◽  
pp. 2049-2052
Author(s):  
D. Muralidharan ◽  
A. Jaculin Raiza ◽  
K. Pandian
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Silver Nanoparticle ◽  
Silver Ions ◽  
Reducing Agent ◽  
Gellan Gum ◽  
Pathogenic Microorganisms ◽  
Complete Reduction ◽  
Excellent Activity ◽  
Analytical Tools

A single pot synthesis of gellan gum coated silver nanoparticles using aniline as a reducing agent has been investigated in present study. The reaction was facile at 80 ºC under reflux condition and the complete reduction of silver ions was noted within 2 h. The resulting gellan gum protected silver nanoparticle was isolated and analyzed with various analytical tools. The antimicrobial activity of the prepared nanocomposite had shown an excellent activity against some selected pathogenic microorganisms.

scholarly journals Synthesis of Silver Nanoparticles from Malva parviflora Extract and Effect on Ecto-5'- Nucleotidase(5'-NT), ADA and AMPDA Enzymes in Sera of Patients with Arthrosclerosis

2017 ◽  
Vol 14 (4) ◽  
pp. 742-750 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Silver Nanoparticles ◽  
Silver Nanoparticle ◽  
Silver Ions ◽  
Reducing Agent ◽  
Rapid Reduction ◽  
Agno3 Solution ◽  
Malva Parviflora

The present research included synthesis of silver nanoparticle from(1*10-3,1*10-4 and1*10-5) M aqueous AgNO3 solution through the extract of M.parviflora reducing agent. In the process of synthesizing silver nanoparticles we detected a rapid reduction of silver ions leading to the formation of stable crystalline silver nanoparticles in the solution.

scholarly journals Antimicrobial Effect of Electrospun Nanofibers Loaded with Silver Nanoparticles: Influence of Ag Incorporation Method

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Luis Jesús Villarreal-Gómez ◽  
Graciela Lizeth Pérez-González ◽  
Nina Bogdanchikova ◽  
Alexey Pestryakov ◽  
Vadim Nimaev ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Silver Nanoparticle ◽  
Electrospun Nanofibers ◽  
Silver Ions ◽  
Antimicrobial Effect ◽  
The Other ◽  
High Antimicrobial Activity ◽  
Biomedical Industry ◽  
Incorporation Method

The antimicrobial bioactivity of silver nanoparticles is well known, and they can be used widely in many applications, becoming especially important in the biomedical industry. On the other hand, the electrospun nanofibers possess properties that can enhance silver nanoparticle applicability. However, silver nanoparticle bioactivity differs depending on the loading of silver ions into electrospun nanofibers. This review is aimed at comparing different silver incorporation methods into electrospun nanofibers and their antimicrobial activity, discussing each procedure’s limitations, and presenting the most promising one. This review showed that the preferred techniques for incorporating silver nanoparticles were direct blending and ultraviolet irradiation methods due to their simplicity and efficient results. Besides, polyacrylonitrile nanofibers (PAN) have been the most reported system loaded with silver nanoparticles. Finally, independently of the technique used, silver nanoparticle-loaded nanofibers show high antimicrobial activity in all cases.

Antimicrobial Activity of Silver Nanoparticles Synthesized by Streptomyces Species JF714876

2012 ◽  
Vol 5 (1) ◽  
pp. 1638-1642 ◽  
Author(s):  
Vidyasagar G M ◽  
Shankaravva B ◽  
R Begum ◽  
Imrose ◽  
Sagar R ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Silver Ions ◽  
Human Beings ◽  
Streptomyces Species ◽  
Force Microscopy ◽  
E Coli ◽  
Extracellular Synthesis ◽  
Atomic Force ◽  
Uv Visible

Microorganisms like fungi, actinomycetes and bacteria are considered nanofactories and are helpful in the production of nanoparticles useful in the welfare of human beings. In the present study, we investigated the production of silver nanoparticles from Streptomyces species JF714876. Extracellular synthesis of silver nanoparticles by Streptomyces species was carried out using two different media. Silver nanoparticles were examined using UV-visible, IR and atomic force microscopy. The size of silver nanoparticles was in the range of 80-100 nm. Antimicrobial activity of silver nanoparticle against bacteria such as E. coli, S. aureus, and dermatophytes like T. rubrum and T. tonsurans was determined. Thus, this study suggests that the Streptomyces sp. JF741876 can produce silver ions that can be used as an antimicrobial substance.

scholarly journals The antimicrobial activity of silver nanoparticles biocomposite films depends on the silver ions release behaviour

2021 ◽  
Vol 359 ◽  
pp. 129859
Author(s):  
Li Wang ◽  
Govindasami Periyasami ◽  
Ali Aldalbahi ◽  
Vincenzo Fogliano
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Silver Ions ◽  
Biocomposite Films

scholarly journals Eco-Friendly Approach to Control Mosquitos (A. stephensi, C. quinquefasciatus, and A. aegypti) Using Silver Nanoparticle

2020 ◽  
Vol 9 (1) ◽  
pp. 203-210
Keyword(s):  
Silver Nanoparticles ◽  
Silver Nanoparticle ◽  
Ag Nanoparticles ◽  
Leaf Extract ◽  
Anopheles Stephensi ◽  
Methanol Extract ◽  
Silver Ions ◽  
Mosquito Vectors ◽  
Chemical Insecticide ◽  
Ft Ir

The available controlling agents for mosquito vectors are chemical insecticides and the frequent usage of these insecticides creating resistance among mosquito vectors and environmental pollutions. Thus, the study was designed to synthesize and characterize the Ag nanoparticles (AgNPs) through a methanol leaf extract of Ocimum canum and find the larvicidal prospective of the AgNPs on the 4th instar larvae of Anopheles stephensi, Culex quinquefasciatus, and Aedes aegypti. The obtained outcomes show that the methanol leaf extract of O. canum was effectively reduced the silver ions and produce constant silver nanoparticles. It was characterized and confirmed by various scientific techniques such as UV-vis spectrum, XRD, SEM, FT-IR and EDaX. Various concentrations (10, 50, 150, 200, and 250 ppm) of characterized nanoparticles were tested for larvicidal activity. The premier larval death was observed at 24 h of treatment on A. aegypti with LC50= 17.03 ppm, followed by C. quinquefasciatus with LC50= 14.89 ppm of methanol extract of O. canum and no death was noticed on A. stephensi. The LD90 value for A. aegypti and C. quinquefasciatus were 24.18 & 20.65 ppm respectively. Hence, the Ag nanoparticles produced from methanol leaf extract of O. canum retains efficiency to control A. aegypti and C. quinquefasciatus. Thus, it might support partially to replace the chemical insecticide which used against these vectors and might contribute to reduce environmental pollution.

Antimicrobial Activity of PET-Silver Nanocomposite Filaments

2018 ◽  
Vol 930 ◽  
pp. 212-217
Author(s):  
Marcos Antônio Guerra ◽  
Jeferson Prado Swerts ◽  
Mei Abe Funcia ◽  
Maria Gabriela Nogueira Campos
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Silver Ions ◽  
Dermal Fibroblasts ◽  
Klebsiella Pneumonia ◽  
Dyeing Process ◽  
Colony Forming Units ◽  
Silver Nanocomposite

This study evaluated the antimicrobial activity of PET-Silver nanocomposite filaments at different concentrations (0, 0.180%, 0.135%, 0.090%, 0.045% and 0.022% w/w) of silver nanoparticles in order to determine the minimum inhibitory concentration and minimum bactericidal concentration of silver incorporated in the PET matrix. The in vitro antibacterial activity was evaluated by the AATCC standard 100: 2012 method, against Staphylococcus aureus ATCC 6538, and Klebsiella pneumonia ATCC 4532. The filaments were tested after one and twenty-one months of preparation to evaluate the effect of time on the antimicrobial activity of the nanocomposites. Moreover, the antimicrobial activity was also evaluated after dyeing the filaments. The silver-free PET filaments have not demonstrated antimicrobial activity and cytotoxicity against human dermal fibroblasts. Nevertheless, excepted for the filament with 0.022% of silver nanoparticles, all PET-Silver nanocomposites reduced more than 99% the colony-forming units (CFU) of Staphylococcus aureus and Klebsiella pneumonia after one and twenty-one months of preparation. This suggests that the MIC of silver nanoparticles incorporated in the PET matrix is lower than 220 ppm (w/w) and the MBC is between 0.022 and 0.045% (w/w). However, after the dyeing process, no antimicrobial activity was observed for any PET-Silver nanocomposite filaments. This may be attributed to the release of silver from the PET matrix during the dyeing process or to the reaction/inactivation of the silver ions by the salts used in this chemical treatment.

scholarly journals COUROUPITA GUIANENSIS LEAF CALLUS EXTRACT MEDIATED SYNTHESIS AND ANTIBACTERIAL ACTIVITY OF SILVER NANOPARTICLES.

2017 ◽  
Vol 10 (5) ◽  
pp. 126
Author(s):  
Jsr Murthy ◽  
Venkata Kumar T ◽  
Narayana Rao V
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Cell Surface ◽  
Size Variation ◽  
Silver Ions ◽  
Bacterial Strains ◽  
Couroupita Guianensis ◽  
Spectral Peaks ◽  
Characteristic Maximum

Objective: Synthesis of varied sized and morphologically distinct silver nanoparticles (AgNPs) using callus/callus extract, and their promising antibacterial and cytotoxicity was reported from very few plant systems. Here, we investigated silver nanoparticle synthetic potential of Couroupita guianensis leaf callus extract and their antibacterial activity.Methods: synthesis of callus mediated silver nanoparticles and characterisation of physical, chemical, and antibacterial activity of AgNPs.Results: Callus extract rapidly reduced silver ions and stabilized nanoparticles have displayed characteristic maximum UV absorbance at 410 nm. SEM and AFM images revealed their spherical morphology and size variation, which is ranged from 30.38 nm to 88.32 nm and were in small aggregates. Capping of AgNPs by the phenolic compounds and proteins revealed from FTIR spectral peaks. Silver nanoparticles displayed significantly high antimicrobial activity against both Gram positive and negative bacterial strains compared to silver ions and gentamicin. This enhanced antimicrobial activity of AgNPs may due their small size leading to efficient molecular contact with cell surface, and uptake and interaction with vital biomolecules.Conclusions: Stable AgNPs were synthesized through reduction and capping of silver ions by polyphenols and proteins present in callus extract. Theenhanced antimicrobial activity of AgNPs may due to their small size leading to efficient molecular contact with the cell surface, penetration, andinteraction, and inactivation of vital biomolecules.KEY WORDS: Couroupita guianensis, callus extract, Silver nanoparticles (AgNPs), antibacterial activity

Green Synthesis of Silver Nanoparticle Using Banana (Musa) Sap

2015 ◽  
Vol 1086 ◽  
pp. 7-10 ◽  
Author(s):  
S. Deena ◽  
Arun Dakshinamurthy ◽  
Paulraj Mosae Selvakumar
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Silver Nanoparticle ◽  
Gram Negative Bacteria ◽  
Visible Spectroscopy ◽  
High Antimicrobial Activity ◽  
Gram Positive Bacteria ◽  
Coated Fabric ◽  
Uv Visible

Green synthesis of silver nanoparticles using banana sap as a solvent, reducing agent and capping agent is reported in this work. Banana sap has also been used as a binder to incorporate silver nanoparticles into cotton fabric. UV-Visible spectroscopy was used to monitor the quantitative formation of silver nanoparticles. Silver nanoparticle coated fabric showed high antimicrobial activity against gram negative bacteria such asPseudomonas aureginosaandEscherichia coli, and gram positive bacteria such asBacillus subtilisandStaphylococcus aureus.KeywordsGreen synthesis, Silver nanoparticles, banana sap, antimicrobial activity

Effect of reducing agent concentrations and temperature on characteristics and antimicrobial activity of silver nanoparticles

2014 ◽  
Vol 137 ◽  
pp. 160-163 ◽  
Author(s):  
Shiv Shankar ◽  
Julalak Chorachoo ◽  
Lily Jaiswal ◽  
Supayang Piyawan Voravuthikunchai
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Reducing Agent
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