scholarly journals Biosythesis of Silver Nanoparticles using Putri Malu (Mimosa pudica) Leaves Extract and Microwave Irradiation Method

Molekul ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. 288
Author(s):  
Is Fatimah ◽  
Nur Afisa Lintang Mutiara
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Microwave Irradiation ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Scattering Method ◽  
Mimosa Pudica ◽  
Microwave Irradiation Method ◽  
Water As Solvent

In this paper, the biosynthesis of silver nanoparticles (AgNPs) using Mimosa pudica extract is discussed. Mimosa pudica leaves extract using water as solvent was used as bio-reductor to an aqueous solution of silver nitrate (AgNO3) and in order to accelerate the reduction, microwave irradiation method was applied. The AgNPs obtained were characterized using UV-Vis spectrophotometry, FTIR spectrophotometry, XRD, SEM-EDX, and particle size analysis based on dynamic scattering method. Effect of preparation method to the formation of AgNPs is also evaluated in antibacterial activity towards E.coli and P. aeruginosa. Rapid and ecofriendly biosynthesis of stable silver nanoparticles was observed in this study. The characterization results and antibacterial assay indicated the uniform and smaller particle size of AgNPs obtained by using microwave method and positively enhance the antibacterial activity against tested bacteria. 

scholarly journals Green Synthesized Silver Nanoparticles Immobilized on Activated Carbon Nanoparticles: Antibacterial Activity Enhancement Study and Its Application on Textiles Fabrics

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3790
Author(s):  
Pratama Jujur Wibawa ◽  
Muhammad Nur ◽  
Mukhammad Asy’ari ◽  
Wijanarka Wijanarka ◽  
Heru Susanto ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Activated Carbon ◽  
Aloe Vera ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
E Coli ◽  
Transmission Electron ◽  
Average Size ◽  
Green Synthesized Silver Nanoparticles

This research aimed to enhance the antibacterial activity of silver nanoparticles (AgNPs) synthesized from silver nitrate (AgNO3) using aloe vera extract. It was performed by means of incorporating AgNPs on an activated carbon nanoparticle (ACNPs) under ultrasonic agitation (40 kHz, 2 × 50 watt) for 30 min in an aqueous colloidal medium. The successful AgNPs synthesis was clarified with both Ultraviolet-Visible (UV-Vis) and Fourier Transform Infrared (FTIR) spectrophotometers. The successful AgNPs–ACNPs incorporation and its particle size analysis was performed using Transmission Electron Microscope (TEM). The brown color suspension generation and UV-Vis’s spectra maximum wavelength at around 480 nm confirmed the existence of AgNPs. The particle sizes of the produced AgNPs were about 5 to 10 nm in the majority number, which collectively surrounded the aloe vera extract secondary metabolites formed core-shell like nanostructure of 8.20 ± 2.05 nm in average size, while ACNPs themselves were about 20.10 ± 1.52 nm in average size formed particles cluster, and 48.00 ± 8.37 nm in average size as stacking of other particles. The antibacterial activity of the synthesized AgNPs and AgNPs-immobilized ACNPs was 57.58% and 63.64%, respectively (for E. coli); 61.25%, and 93.49%, respectively (for S. aureus). In addition, when the AgNPs-immobilized ACNPs material was coated on the cotton and polyester fabrics, the antibacterial activity of the materials changed, becoming 19.23% (cotton; E. coli), 31.73% (polyester; E. coli), 13.36% (cotton; S. aureus), 21.15% (polyester; S. aureus).

scholarly journals STABILITY OF ANTI-ACNE NIOSOME GELS CONTAINING BETEL LEAF (PIPER BETLE L.) ESSENTIAL OIL

2017 ◽  
Vol 9 ◽  
pp. 130
Author(s):  
Mahdi Jufri ◽  
Muthaharrah . . ◽  
Elsa Humairah ◽  
Ernie Hermawati Purwaningsih
Keyword(s):  
Particle Size ◽  
Antibacterial Activity ◽  
Essential Oil ◽  
Entrapment Efficiency ◽  
Particle Size Analysis ◽  
Gelling Agent ◽  
Gas Chromatography Mass Spectrometry ◽  
Size Analysis ◽  
Piper Betle ◽  
Betel Leaf

Objective: Formulation, antibacterial activity, and stability tests of niosomal gels containing betel leaf (Piper betle L.) essential oil as an anti-acnetreatment were carried out. Niosome vesicular carriers provide drug delivery through the topical and transdermal routes. The aim of creating theniosome preparation was to increase the transfollicular penetration and improve the stability of the gel.Materials and Methods: Betel leaf essential oil extraction was performed using the steam distillation method, and essential oil compoundidentification was completed using gas chromatography–mass spectrometry. The niosome formulations were generated with two cholesterol–surfactant amount ratios, specifically, 1:1 (F1) and 1:2 (F2; w/w). The niosomes were evaluated, including the entrapment efficiency test, usingultraviolet-visible spectrophotometry; particle size analysis was performed using a particle size analyzer; and the vesicle morphology test wasconducted using transmission electron microscopy. The niosomes were made into a gel using 0.5% carbopol 940 as the gelling agent. The niosomegels were evaluated for their organoleptic properties, pH, viscosity, antibacterial activity against Propionibacterium acnes, and stability for 12 weeksat three different storage temperatures, namely, low temperature (4±2°C), room temperature (28±2°C), and high temperature (40±2°C).Results: The test results showed that the F2 niosome gel was more stable than the F1 gel was, while the antibacterial activities of the F1 and F2niosome gels did not differ significantly.Conclusion: The niosomal gel preparations’ inhibition of the growth of P. acnes bacteria was decreased compared with that of the essential oils.

scholarly journals INVESTIGATION ON DISSOLUTION PATTERN AND MATHEMATICAL MODELING OF DRUG RELEASE OF QUERCETIN BY COMPLEXATION WITH CYCLODEXTRIN NANOSPONGES

2019 ◽  
pp. 260-264
Author(s):  
SOBITHARANI P ◽  
ANANDAM S ◽  
MOHAN VARMA M ◽  
VIJAYA RATNA J ◽  
SHAILAJA P
Keyword(s):  
Particle Size ◽  
Drug Release ◽  
Average Particle Size ◽  
Particle Size Analysis ◽  
Water Soluble ◽  
Size Analysis ◽  
Average Particle ◽  
Scattering Method ◽  
Release Pattern ◽  
Cyclodextrin Nanosponges

Objective: The main objective of this study was to investigate the release pattern of a poorly water-soluble drug quercetin (QU) by fabricating its cyclodextrin nanosponges. Methods: Characterization of the original QU powder and QU-loaded nanosponges was carried out by the Fourier-transformed infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), and dissolution tester. The drug release pattern was subjected to various kinetic models. Results: FTIR studies confirmed the formation of inclusion complex of drug. The particle size analysis revealed that the average particle size measured by laser light scattering method is around 400–420 nm with low polydispersity index. The particle size distribution is unimodal and having a narrow range. A sufficiently high zeta potential indicates that the complexes would be stable and the tendency to agglomerate would be miniscule. TEM image revealed the porous nature of nanosponges. The dissolution of the QU nanosponges was significantly higher compared with the pure drug. Conclusion: From the kinetic study, it is apparent that the regression coefficient value closer to unity in case of Korsmeyer-Peppas model indicates that the drug release exponentially to the elapsed time. n value obtained from the Korsmeyer-Peppas plots, i.e., 0.9911 indicating non-Fickian (anomalous) transport ; thus, it projected that delivered its active ingredient by coupled diffusion and erosion.

scholarly journals Antioxidant and Antibacterial Activities of Biosynthesized Silver Nanoparticles using Aqueous Terminalia catappa Leaf Extracts as Novel Reducing Agent

2020 ◽  
Vol 32 (8) ◽  
pp. 2079-2083
Author(s):  
Paweena Porrawatkul ◽  
Rungnapa Pimsen ◽  
Saksit Chanthai ◽  
Prawit Nuengmatcha
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Particle Size Analysis ◽  
Reducing Agent ◽  
Size Analysis ◽  
Main Peak ◽  
Leaf Extracts ◽  
Characteristic Functional ◽  
Terminalia Catappa

In this study, silver nanoparticles (AgNPs) were successfully synthesized from aqueous Terminalia catappa leaf extract that acts as a novel reducing agent. Various parameters, including pH, temperature and reaction time, were determined. The UV-visible spectra showed the main peak at 416 nm, which was the characteristic surface plasmon resonance of AgNPs. The spherical shape and particle size of 49 ± 0.01 nm were observed from SEM, TEM and laser particle size analysis (LPSA). FTIR spectra of the leaf extract exhibited the characteristic functional groups that should be responsible for Ag+ ion reduction. The EDX spectrum proved that the obtained sample is silver. The antioxidant activity of AgNPs treated with the leaf extract as determined by the DPPH assay was higher compared to that of Terminalia catappa leaf extract, and the treated AgNP sample exhibited high antibacterial potential against both Gram-positive and Gram-negative bacteria.

Optimization and thermal effects of polyaniline nanomaterial synthesized by chemical oxidative polymerization method

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Dhachanamoorthi N ◽  
Padmapriya B
Keyword(s):  
Particle Size ◽  
Antibacterial Activity ◽  
Functional Group ◽  
Oxidative Polymerization ◽  
Quantitative Information ◽  
Particle Size Analysis ◽  
Polymer Materials ◽  
Size Analysis ◽  
Chemical Oxidative Polymerization ◽  
Polymerization Method

Scientific zone has a great attention to the polyaniline (PANI) nanomaterials which is an organic, conductive and a conjugated polymer. It has variety of applications such as in batteries, microelectronics displays, antistatic coatings, electromagnetic shielding materials and actuators [1]. PANI was synthesized by using chemical oxidative polymerization method. The preparation process carried out by the main reagent aniline (C6H7N) with the ammonium peroxydisulpate (APS) ((NH4)2S2O8) which act as an oxidant and hydrochloric acid (HCL) as a dopant in an ambient temperature. The synthesized polymer materials are annealed at different temperatures such as 200°C,300°C and 400°C. After annealed treatment, the weight percentage of polymer material are changed were decreases with increase the temperature of pure PANI (0.441g),200°C(0.172g), 300°C(0.147g), 400°C (0.105g). Then the obtained polymer materials are characterized by FTIR, UV-Visible, Particle size analysis (PSA) and Antibacterial analysis. FTIR is used to determine the functional group of polymer nanomaterials. UVVisible exhibits the quantitative information about the polymer nanomaterials by using its band gap. The size of the individual particles and the size distribution range of the respective samples are determined by the Particle Size Analyzer (PSA). Antibacterial activity is used to find the polymer nanomaterials which kills bacteria, or bacteriostatic,which slow down the growth of bacteria. These profiling techniques are used to find the properties like functional group, quantitative information, particle size, antibacterial activity of respective polyaniline nanomaterial samples.

Bio-mimetic synthesis of silver nanoparticles

2020 ◽  
Vol 7 (1) ◽  
pp. 1-5
Author(s):  
Avinash Kumar Reddy G ◽  
Krishna Reddy BV ◽  
Nageswara Rao G
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Large Scale ◽  
Uv Spectroscopy ◽  
Cost Effective ◽  
Particle Size Analysis ◽  
Nano Particles ◽  
Size Analysis ◽  
Metallic Silver ◽  
Analytical Instruments

Silver nanoparticles have their demand in various fields of science and technology and their applications extend even in medical and pharmaceutical arenas. They have been used as preservatives, diagnosing aids and potent antibacterial agents. But their production is a serious matter of concern when it comes to cost, efficacy and toxicity issues. Overcoming these limitations green synthesis has taken its advantage for their commercial and large scale synthesis. This research concentrates on the preparation of silver nano particles by using purified leaf extract of Lannea coromandelica and evaluation of the same using UV-Vis Spectrophotometry, FTIR, EDXS, SEM and particle size analysis. The produced nanoparticles exhibited surface plasmon resonance at 420nm in UV spectroscopy. EDS Spectrum showed the presence of metallic silver in the solution. They are roughly cubic in shape, smooth surfaced and measure about 10-20nm in diameter which is evident from the particle size analysis. FTIR studies revealed the presence of O-H groups indicating polyphenols and also confirms capping of proteins over the nanoparticles. The results proved the eco-friendly synthesized silver nanoparticles. The prepared nanoparticles have been analyzed using sophisticated analytical instruments. The results confirm the formation of silver nanoparticles. The bio-mimetic synthesis of silver nanoparticles is relatively safer and cost effective. The potency and effect of silver nanoparticles was determined yet the toxicity was to be considered for establishing it as a therapeutic agent.

scholarly journals Reduction of 4-nitrophenol Mediated by Silver Nanoparticles Synthesized using Aqueous Leaf Extract of Peronema canescens

2021 ◽  
Vol 16 (2) ◽  
pp. 253-259
Author(s):  
Salprima Yudha S ◽  
Aswin Falahudin ◽  
Risky Hadi Wibowo ◽  
John Hendri ◽  
Dennie Oktrin Wicaksono
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Average Particle Size ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Average Particle ◽  
Transmission Electron Microscopy Analysis ◽  
Nitrophenol Reduction ◽  
Electron Microscopy Analysis ◽  
Aqueous Leaf Extract

In this study, we developed an alternative of 4-nitrophenol reduction mediated by silver nanoparticles (AgNPs) which was synthesized using aqueous extract of the Peronema canescens leaf through an eco-friendly approach. The reducing 4-nitrophenol to 4-aminophenol mediated by AgNPS in the presence of sodium borohydride as a hydrogen source proceeded rapidly at room temperature without any additional treatments. The AgNPS synthesis was simple and was carried out under mild conditions. Ultraviolet–visible spectroscopy was performed to examine the properties of the obtained AgNPs, which displayed an absorption peak at 431 nm. A transmission electron microscopy analysis revealed that the AgNPs were spherical in shape and had an average particle size of 19 nm as determined by particle size analysis. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

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