scholarly journals In vivo antimicrobial activity of silver nanoparticles produced via a green chemistry synthesis using Acacia rigidula as a reducing and capping agent

2018 ◽  
Vol Volume 13 ◽  
pp. 2349-2363 ◽  
Author(s):  
Carlos Enrique Escárcega-González ◽  
Javier Alberto Garza-Cervantes ◽  
Augusto Vazquez-Rodríguez ◽  
Liliana Zulem Montelongo-Peralta ◽  
Mario Tadeo Treviño-Gonzalez ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Green Chemistry ◽  
Capping Agent ◽  
Acacia Rigidula

Synthesis of Biogenic Silver Nanoparticles Using Caesalpinia digyna and Investigation of Their Antimicrobial Activity and In Vivo Biocompatibility

2020 ◽  
Vol 3 (11) ◽  
pp. 7722-7733
Author(s):  
Mahruba Sultana Niloy ◽  
Md. Monir Hossain ◽  
Masato Takikawa ◽  
Md. Salman Shakil ◽  
Shakil Ahmed Polash ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Biogenic Silver Nanoparticles

scholarly journals Stachybotrys chartarum: A Novel Biological Agent for The Extracellular Synthesis of Silver Nanoparticles and Their Antimicrobial Activity

2015 ◽  
Vol 18 (2) ◽  
pp. 75 ◽  
Author(s):  
Abdel Ghany Tarek Mohamed
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Silver Nitrate ◽  
Stachybotrys Chartarum ◽  
Capping Agent ◽  
Extracellular Synthesis ◽  
Transmission Electron

Microbial assisted biosynthesis of nanoparticles is a rapidly progressing area of nanobiotechnology. Inthis paper Stachybotrys chartarum assisted extracellular synthesis of silver nanoparticles (AgNPs) is reportedwhen challenged with 1mM silver nitrate (AgNO3). The characterization of AgNPs was carried out visualobservation and UV-Vis spectrophotometry. Further analysis carried out by Fourier Transform InfraredSpectroscopy (FTIR), provides evidence for the presence of proteins as capping agent, which helps in increasingthe stability of the synthesized AgNPs. Transmission Electron Microscopy (TEM) investigations confi rmedthat AgNPs were formed. The synthesized silver nanoparticles were found in the range of 65-108 nm. Finally,the antimicrobial susceptibility of AgNPs synthesized was investigated which exhibited more potent activityagainst bacteria than fungi compared with using silver nitrate at concentration 1mM. Keywords: Antimicrobial activity, Stachybotrys chartarum, Silver nanoparticles

Biogenic Synthesis and Characterization of Silver Nanoparticles Using Some Medical Plants and Evaluation of Their Antibacterial and Toxicity Potential

2018 ◽  
Vol 101 (6) ◽  
pp. 1905-1912
Author(s):  
Ayat Jadou ◽  
Ayyad W Al-Shahwany
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Human Lymphocytes ◽  
Critical Factor ◽  
Thymus Vulgaris ◽  
Bacterial Isolates ◽  
Leaf Extracts ◽  
Microtiter Plates

Abstract Background: Silver nanoparticles (AgNPs) are employed in various applications in the areas of catalysis, optoelectronics, detection and diagnostics, antimicrobials, and therapeutics. Objective: The aim of this work was to study the antimicrobial activity of aqueous and methanolic leaf extracts of Thymus vulgaris and Urtica dioica and biologically prepared silver nanoparticles, as single or in combination treatments, against Escherichia coli and methicillin-resistant Staphylococcus aureus isolates. Methods: The minimum inhibitory concentration (MIC) was quantified by using a microdilution method in sterile 96-well microtiter plates. The assessment of the toxicity of AgNP solutions was evaluated on human blood lymphocyte cells. Results: The results of this study revealed that all AgNP solutions have the lowest MIC values against the bacterial isolates in relation with the methanolic and aqueous extract solutions. However, the results showed that the increasing AgNP concentration was a critical factor influencing the interaction between AgNPs and the human lymphocytes. Conclusions: The cytotoxicity of nanoparticles increased significantly (P < 0.05) at high concentrations. In addition, the biosynthesized AgNPs have an increased antimicrobial activity against all tested bacterial isolates. Highlights: AgNPs have been recognized as an effective antimicrobial agent that exhibits low toxicity in humans and has diverse in vitro and in vivo applications.

COMPARATIVE EVALUATION OF ANTIMICROBIAL ACTIVITY OF CALCIUM HYDROXIDE AND SILVER NANOPARTICLES AS INTRACANAL MEDICAMENT: AN IN-VIVO STUDY

2021 ◽  
pp. 13-15
Author(s):  
Aditi Kohli ◽  
Rakesh Mittal ◽  
Monika Tandan
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Calcium Hydroxide ◽  
Wilcoxon Test ◽  
Permanent Teeth ◽  
Working Length ◽  
Intergroup Comparison ◽  
Group 2 ◽  
Group 1

The aim of this study was to evaluate and compare the antimicrobial activity of calcium hydroxide and silver nanoparticles as an intracanal medicament in patients with necrotic/infected pulp. Materials And Methods– 30 single rooted permanent teeth diagnosed clinically and radiographically with necrotic/infected pulp were included. After complete disinfection, access opening was done and working length was determined. The rst microbiological pre-treatment sample (S1) was collected by paper points. After completion of instrumentation, a post-instrumentation sample (S2) was taken and the teeth were divided into two groups: Group 1: calcium hydroxide, Group 2: Silver nanoparticles. The intracanal medicaments were left in place for 7 days. Post 1 week, S3 was taken. Samples collected were cultured on BHI agar and colony forming units were counted after 24 hours. Results- Intergroup comparison was done using Mann Whitney U test & intragroup comparison was done using Friedman test & Wilcoxon test. It was observed that the percentage reduction was better with Group 2 (Silver nanoparticles), however, it was not statistically signicant when compared to Group 1 (Calcium hydroxide). Conclusion – It was concluded that silver nanoparticles showed signicant antimicrobial activity and can be used as an effective root canal medicament as an alternative to calcium hydroxide dressing.

scholarly journals A Study on Synthesis of Silver Nanoparticles Using Ocimum Sanctum L (Tulsi) Leaf Extract & their Antimicrobial Activity: A Green Chemistry Approach

2020 ◽  
Vol 8 (1) ◽  
pp. 99-103
Author(s):  
Swati Goyal
Keyword(s):  
Electron Microscopy ◽  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Green Chemistry ◽  
Leaf Extract ◽  
Nitrate Solution ◽  
Ocimum Sanctum ◽  
Microbial Culture ◽  
Wide Range ◽  
Different Types

Nanoparticles (NPs) are being widely used in different fields; therefore, there is growing interest in the development of a biological and environmental safety method for their production. Now a day’s chemical and physical methods are being used for the development of nanoparticle that is costly, time-consuming, and harmful for the environment. Plant-mediated synthesis of nanoparticles is a “Green chemistry” approach that connects different types of plants with nanotechnology. It has gained much more attention as a reliable, sustainable, and eco-friendly method for synthesizing a wide range of materials/nanomaterials. Plants are called nature’s “chemical factories” therefore, plants and plant extracts are the best options to produce different types of nanoparticles. In this present study, silver nanoparticles were synthesized by using leaf extract of Ocimum sanctum and aqueous silver nitrate solution through a simple and eco-friendly method. Then the developed silver nanoparticles were characterized by using different types of techniques such as Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), UV-Vis spectrophotometer, and Fourier transforms infra-red (FTIR) spectroscopy. Their antimicrobial activity was screened against microbial culture, and it was found that the synthesized silver nanoparticles have potential applications in antibacterial activity.

In-Vivo and In-Vitro Biocompatibility Evaluations of Silver Nanoparticles with Antimicrobial Activity

2012 ◽  
Vol 12 (7) ◽  
pp. 5205-5209 ◽  
Author(s):  
Dong-Wook Han ◽  
Yeon I Woo ◽  
Mi Hee Lee ◽  
Jong Ho Lee ◽  
Jaebeom Lee ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
In Vitro Biocompatibility
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