scholarly journals Biosynthesis and Characterization of Silver Nanoparticles from Bitter Melon (Momordica charantia) Fruit and Seed Extract and their Antimicrobial Activity

2021 ◽  
Vol 2 (1) ◽  
pp. 1-11
Author(s):  
Umme Ruman ◽  
Poonah Kia
Keyword(s):  
Silver Nanoparticles ◽  
Average Particle Size ◽  
Antibacterial Properties ◽  
Seed Extract ◽  
Food Preservation ◽  
Momordica Charantia ◽  
Average Particle ◽  
Ag Nps ◽  
Fruit Extract ◽  
Biotechnological Approach

Momordica charantia is a phenolic rich vegetable. In this study, the fruits and seeds extract of M. charantia were used to synthesize silver nanoparticles (Ag NPs) using biotechnological approach. Structural, morphological, and antimicrobial properties of the synthesized Ag-NPs were characterized using UV/Vis Spectrophotometry, Dynamic Light Scattering (DLS), High Resolution Transmission Electronics Microscopy (HRTEM), Field Emission Scanning Electron Microscopy (FESEM), Fourier Transform Infrared Spectroscopy (FTIR) and X-Ray diffraction (XRD). In DLS, the average particle size of Ag-NPs was found 17.5 ± 2.1 nm and 18.3 ± 1.9 nm using seed and fruit extract, respectively. HRTEM has revealed their spherical structure for both seed and fruit extract of M. charantia. FESEM images found Ag-NPs with the size between ~20 and ~35 nm. The Ag NPs exhibited Surface Plasmon Resonance (SPR) centered at 405 nm for seed extract and 402 nm for fruit extract using a UV–visible spectrophotometer. FT-IR results showed phenolic and carbohydrate compounds involved in the synthesis of the Ag NPs. Furthermore, the synthesized Ag NPs has found highly rich in antibacterial properties against Escherichia coli and Pseudomonas aeruginosa bacterium. Thus, bioconversion of Ag NPs by M. charantia could be employed as a potential antibacterial source to eliminate pathogenic microorganisms from agricultural and food preservation industry.

scholarly journals Characterization of Silver Nanoparticles Synthesized Using Ocimum basilicum Seed Extract

2021 ◽  
Vol 11 (2) ◽  
pp. 3411-3420
Keyword(s):  
Silver Nanoparticles ◽  
Average Particle Size ◽  
Morphological Characteristics ◽  
Ocimum Basilicum ◽  
Seed Extract ◽  
Average Particle ◽  
Face Centered Cubic ◽  
Ag Nps ◽  
X Ray ◽  
Dpph Method

The development of an eco-friendly method for the production of nanomaterials is an area of significant research and commercial interest owing to its numerous applications in various disciplines. This study used a simple green synthesis approach to produce silver nanoparticles using Ocimum basilicum seed extract. The optical, structural, and morphological characteristics of the synthesized silver nanoparticles (Ag NPs) were found using UV visible absorption spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-Ray diffractometer (XRD), dynamic light scattering (DLS), field emission scanning electron microscope (FE-SEM), and energy dispersive X-ray analysis (EDAX). The aqueous medium containing reduced silver ions showed maximum UV absorption at 430 nm in response to the plasmon absorbance behavior of silver nanoparticles. Synthesized nanoparticles had a spherical shape with an average particle size of 134.04 nm and a face-centered cubic (FCC) structure. Synthesized Ag NPs showed excellent free radical scavenging activity as evaluated using the DPPH method. Additionally, the green synthesized silver nanoparticles showed appreciable antimicrobial activity against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria compared to O. basilicum seed extract. Thus, O. basilicum seed extract can be used as a bio-reducing agent for producing silver nanoparticles and an effective way of using bioactive resources with their medicinal benefits.

scholarly journals Green synthesis, characterization and photocatalytic applications of silver nanoparticles using Diospyros lotus

2020 ◽  
Vol 9 (1) ◽  
pp. 87-96 ◽  
Author(s):  
Samaira Yasmin ◽  
Shazia Nouren ◽  
Haq Nawaz Bhatti ◽  
Dure Najaf Iqbal ◽  
Shan Iftikhar ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Average Particle Size ◽  
Xrd Analysis ◽  
Research Area ◽  
Average Particle ◽  
Face Centered Cubic ◽  
Ag Nps ◽  
Leaf Extracts ◽  
Diospyros Lotus

AbstractCurrently, the green route for synthesis of silver nanoparticles (Ag NPs) using plants leaf extract is an emerging research area in nanotechnology. The present study was explored for synthesis, characterization and catalytic application of Ag NPs using Diospyros lotus fresh leaf extracts. Factors affecting the synthesis were optimized and optimum conditions were pH of 8.6, silver nitrate (AgNO3) concentration of 1.5 mM and 10 mL leaf extract. Formation of Ag NPs was observed by change in color of reaction mixture from pale yellow to reddish brown. The synthesized Ag NPs were characterized using UV-Vis spectrophotometer, EDX, XRD and SEM analyses. UV-Vis spectrophotometer showed maximum absorbance peak in the range of 407 nm at different time intervals indicating formation of Ag NPs. SEM and XRD analysis confirmed face centered cubic structure and crystalline nature of biologically synthesized Ag NPs with average particle size of 27 nm. The purity of synthesized Ag NPs was revealed by EDX. Finally, photo catalytic activity (PCA) of Ag NPs was studied and 72.91% decolorization of industrial waste water was obtained at 54 h. Some important parameters like pH, turbidity, conductance; TSS, TDS, sulphide, sulphates, etc. were also monitored before and after treatment with Ag NPs.

Biosynthesis of silver nanoparticles by usingGanoderma-mushroom extract

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540047 ◽  
Author(s):  
S. U. Ekar ◽  
Y. B. Khollam ◽  
P. M. Koinkar ◽  
S. A. Mirji ◽  
R. S. Mane ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Particle Size ◽  
Silver Nanoparticles ◽  
Average Particle Size ◽  
Average Particle ◽  
Medicinal Mushroom ◽  
Ag Nps ◽  
Transmission Electron ◽  
Uv Visible

Present study reports the biochemical synthesis of silver nanoparticles ( Ag -NPs) from aqueous medium by using the extract of medicinal mushroom Ganoderma, as a reducing and stabilizing agents. The Ag -NPs are prepared at room temperature by the reduction of Ag+to Ag in aqueous solution of AgNO3. The resultant particles are characterized by using UV-visible spectroscopy, Fourier transform infrared (FTIR) spectroscopy and transmission electron microscopy (TEM) measurement techniques. The formation of Ag -NPs is confirmed by recording the UV-visible absorption spectra for surface plasmon resonance (SPR) where peak around 427 nm. The prominent changes observed in FTIR spectra supported the reduction of Ag+to Ag . The morphological features of Ag -NPs are evaluated from HRTEM. The spherical Ag -NPs are observed in transmission electron microscopy (TEM) studies. The particle size distribution is found to be nearly uniform with average particle size of 2 nm. The Ag -NPs aged for 15, 30, 60 and 120 days showed no profound effect on the position of SPR peak in UV-visible studies, indicating the protecting/capping ability of medicinal mushroom Ganoderma in the synthesis of Ag -NPs.

scholarly journals Sargassum Influx on the Mexican Coast: A Source for Synthesizing Silver Nanoparticles with Catalytic and Antibacterial Properties

2021 ◽  
Vol 11 (10) ◽  
pp. 4638
Author(s):  
Jose Luis López-Miranda ◽  
Rodrigo Esparza ◽  
Marlen Alexis González-Reyna ◽  
Beatriz Liliana España-Sánchez ◽  
Angel Ramon Hernandez-Martinez ◽  
...  
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Average Particle Size ◽  
Antibacterial Properties ◽  
Average Particle ◽  
X Ray Diffraction ◽  
X Ray ◽  
Experimental Parameters ◽  
First Time

This work reports, for the first time, the synthesis of silver nanoparticles using extracts of the species of Sargassum natans and Sargassum fluitans (AgNPs-S). Their antibacterial and catalytic properties are compared with silver nanoparticles obtained by chemical synthesis (AgNPs-C). The characterization of AgNPs-S and AgNPs-C was carried out using ultraviolet–visible spectroscopy (UV–Vis), dynamic light scattering (DLS), zeta potential, a scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis. The synthesis of silver nanoparticles using Sargassum extract was optimized through varying experimental parameters, such as the type of solvent used to prepare the extract, the volume of the extract, and the pH of the system. The most efficient sample (AgNPs-S) was prepared with a water–ethanol-based extract, using a 3:1 volumetric ratio of extract: a precursor salt with the addition of 1 mL of NaOH pH = 14. The AgNPs-C were spherical in shape, with an average particle size of 11.55 nm, while the AgNPs-S were polyhedral shaped, with an average particle size of 26.39 nm. The synthesized AgNPs-S were found to have significantly higher catalytic activity for the degradation of methylene blue and more effective antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa than AgNPs-C.

scholarly journals Liver Tissue Regeneration using Nano Silver impregnated Sodium Alginate/PVA Composite Nanofibres

2020 ◽  
Vol 2 (1) ◽  
pp. 16-21 ◽  
Author(s):  
Manikandan G ◽  
Yuvashree M ◽  
Sangeetha A ◽  
Bhuvana K P ◽  
Sanjay K Nayak
Keyword(s):  
Antibacterial Activity ◽  
Sodium Alginate ◽  
Ag Nanoparticles ◽  
Liver Tissue ◽  
Average Particle Size ◽  
Antibacterial Properties ◽  
Poly Vinyl Alcohol ◽  
Average Particle ◽  
Ag Nps

Liver regeneration is a highly organized tissue regrowth process and is the most important reaction of the injured liver. The present study endeavors towards the preparation and characterization of nanoporous Sodium Alginate (SA)/ Poly Vinyl Alcohol (PVA) composite, nanofibrous scaffolds coated with silver (Ag) nanoparticles for hepatocellular regeneration.  Chitosan based Silver nanoparticles possess high antibacterial activity has been preferred in the scaffold preparation to improve the antibacterial properties. The structural characterization of Ag Nanoparticles revealed the amorphous nature with an average particle size of 300 nm. Nanofibres (Scaffolds) were prepared by electrospinning SA/PVA solution at a voltage of 18-25 kV and Ag NPs were coated on it for antibacterial activity. Invitro studies denoted the growth of nitro compounds, amides and collagen which are the major constituents of liver tissue.

scholarly journals Physical Characteristic and Antibacterial Activity of Silver Nanoparticles from Green Synthesis Using Ethanol Extracts of Phaleria macrocarpa (Scheff.) Boerl Leaves

2019 ◽  
Vol 24 (1) ◽  
pp. 22 ◽  
Author(s):  
Tri Puji Lestari ◽  
Fitia Abbas Tahlib ◽  
Johan Sukweenadhi ◽  
Kartini Kartini ◽  
Christina Avanti
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Green Synthesis ◽  
Silver Nanoparticle ◽  
Average Particle Size ◽  
Synthesis Method ◽  
Antibacterial Properties ◽  
Ethanol Extract ◽  
Average Particle

The Green Synthesis method is widely developed due to its environmentally friendly, cost-effective, and easy application for nanoparticle-scale synthesis. Among all metal nanoparticles, silver nanoparticles are the most utilized products in the field of nanotechnology. Biomolecules contained in plant extracts can reduce the size of silver particles to nano size. This study aims to determine the antibacterial properties and activity of silver nanoparticles synthesized with the ethanol extract of mahkota dewa leaves. The formation of silver nanoparticles is monitored with UV-Vis absorption and its change in color. Parameters evaluated are shape, size, particle size distribution, composition, metal residue, and a functional group of nanoparticles, using Scanning Electron Microscopy (SEM), Particle Size Analyzer (PSA), X-Ray Diffraction (XRD), and Fourier Transform InfraRed (FTIR) instrument. The research on UV-Vis color and absorption show black silver color with the wavelength of 450-465nm. The characterization result shows spherical-shaped silver nanoparticle. Furthermore, PDI best value on concentration of 0.125% is 0,221±0,0482 with average particle size of 130,300±12,6858 nm. The diffraction pattern of silver nanoparticle with XRD test indicates that the nanoparticles contain the silver component. Antibacterial activity test shows that silver nanoparticles have a greater inhibition zone than AgNO3, and 0.125% ethanol extract of mahkota dewa leaves against Escherichia coli and Staphylococcus aureus. From the results of the study, it can be concluded that the ethanol extract from mahkota dewa leaves can be used as a bioreductor agent to produce silver nanoparticles which have greater antimicrobial activity compared to Ag and ethanol extract from mahkota dewa leaves.

scholarly journals Chemical Synthesis of Silver Nanoparticles Using Tri-sodium Citrate, Stability Study and Their Characterization

2020 ◽  
pp. 37-50
Author(s):  
Prem Santhi Yerragopu ◽  
Sharanagouda Hiregoudar ◽  
Udaykumar Nidoni ◽  
K. T. Ramappa ◽  
A. G. Sreenivas ◽  
...  
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Sodium Citrate ◽  
Structural Characteristics ◽  
Average Particle Size ◽  
Stability Study ◽  
Average Particle ◽  
Ag Nps ◽  
Stirring Time ◽  
Absorbance Peak

The present work was aimed to study the synthesis of silver nanoparticles (Ag NPs) using Tri-Sodium Citrate (TSC), stability study of synthesized Ag NPs and their characterization. Synthesis of Ag NPs has been carried out by maintaining different conditions such as TSC concentration (0.50, 1.00 and 1.50%), AgNO3 concentration (0.50, 1.00 and 1.50 mM) and stirring time (10, 15 and 20 min). The stability study of synthesized Ag NPs conducted for 30 days without adding any stabilizing agents. The characterization of synthesized Ag NPs was carried out for different parameters like particle size and zeta potential using particle size analyzer, absorbance peak by UV-Visible spectrophotometer, morphology by Scanning Electron Microscope (SEM), crystallinity by X-Ray Diffractometer (XRD) and material structural characteristics by Atomic Force Microscope (AFM). The stable chemically synthesized Ag NPs were obtained at C20 (AgNO3 concentration of 1.5 mM, TSC 1.5% and stirring time 20 min) (desirability 99.97%), with average particle size of 22.14 nm and average absorbance peak of 449.85 nm.

Functionalized Silver Nanoparticles Enhance Therapeutic Effect of Paclitaxel for Prostate Cancer Therapy by Arresting the Cellular Cycle and Producing ROS

NANO ◽  
2021 ◽  
Author(s):  
Jiahong Chen ◽  
Shumin Fang ◽  
Lifen Yang ◽  
Xiaohui Ling ◽  
Jinxian Liao ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Silver Nanoparticles ◽  
Hyaluronic Acid ◽  
Cell Model ◽  
Average Particle Size ◽  
Average Particle ◽  
Dependent Manner ◽  
Lncap Cells ◽  
Ag Nps ◽  
Anticancer Efficacy

Chemotherapy has been proven to be an efficient strategy for the treatment of prostate cancer (PC). However, the insufficient cellular uptake of drugs is the biggest challenge for PC therapy. Therefore, in order to address the above concern, we developed tumor-targeted hyaluronic acid-silver nanoparticles (HA-Ag NPs), in which hyaluronic acid can specially bind with its receptor CD44 overexpressed on LNCaP cells. HA-Ag NPs have been used to load paclitaxel (PTX) to prepare functionalized silver nanoparticles (HA-Ag-PTX). The average particle size of HA-Ag-PTX was about 70 nm and kept under 120 nm for eight days. androgen-sensitive prostate cancer cells (LNCaP) cells show good uptake of HA-Ag-PTX, and HA-Ag-PTX enters LNCaP cells in a clathrin-mediated energy-dependent manner. HA-Ag-PTX exhibits an excellent pH response release of PTX under the acidic condition, which is beneficial to enhance the distribution of PTX in the tumor microenvironment. HA-Ag-PTX effectively suppresses the migration and proliferation of LNCaP cells probably by arresting the cellular cycle at [Formula: see text]0/[Formula: see text]1 phase and enhancing the production of the reactive oxygen species. It is worth mentioning that HA-Ag-PTX exhibits greater anticancer activity in comparison with free PTX in the LNCaP cell model, indicating that HA-Ag NPs can effectively enhance the anticancer efficacy of PTX. As a whole, these findings suggest that HA-Ag-PTX has promising potential for PC therapy.

Green Synthesis of Silver Nanoparticles by Using Simarouba amara Aubl. Fruit Extract and their Antioxidant and Antibacterial Activities

2017 ◽  
Vol 7 (03) ◽  
Author(s):  
Guru Kumar Dugganaboyana ◽  
Chaitra Kyasandra Eranna
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Therapeutic Potential ◽  
Average Particle Size ◽  
Butylated Hydroxytoluene ◽  
Commercial Application ◽  
Average Particle ◽  
Face Centered Cubic ◽  
Fruit Extract ◽  
Sem Images

The green synthesis of nanoparticles has emerged as a cost-effective and environmentally benign technique for therapeutic applications. Nanomedicine utilizes biocompatible nanomaterials for diagnostic and therapeutic potential for various biomedical applications. Different biological methods are gaining recognition over the physical and chemical methods of synthesis for the production of silver nanoparticles (AgNPs) due to their multiple applications. The present study describes the synthesis of AgNPs using the fruit extract of Simaroubaamara (S. amara)followed by characterization of AgNPswas done using different methods, which include; ultraviolet-visible spectroscopy (UV-Vis) wherein it shows absorption peak at 410 nm confirming the AgNPs, from dynamic light scattering (DLS) the average particle size is 80nm with crystalline structure confirmed by scanning electron microscope (SEM) images and zeta potential analysis shows the positive polarity of the particle favoring the drug targeting. The powder X-ray diffraction study (PXRD) revealed crystalline nature with a face-centered cubic (fcc) structure of AgNPs. The synthesized AgNPs were also tested for antioxidant therein the particles could scavenge the stable free radical 1, 1-Diphenyl-2-picrylhydrazyl (DPPH) of about 80% to that of positive control butylated hydroxytoluene (BHT) and antimicrobial studies indicated its microbicidal efficacy against both Gram positive and negative clinical pathogens. It could be concluded that Simaroubaamara fruit extract can be used efficiently in the production of potential antioxidant and antimicrobial AgNPs for commercial application.

scholarly journals GREEN SYNTHESIS OF SILVER NANOPARTICLES USING MEDICINAL PLANT ACALYPHA INDICA LEAF EXTRACTS AND ITS APPLICATION AS AN ANTIOXIDANT AND ANTIMICROBIAL AGENT AGAINST FOODBORNE PATHOGENS

2017 ◽  
Vol 9 (5) ◽  
pp. 42 ◽  
Author(s):  
Soumya Menon ◽  
Happy Agarwal ◽  
S. Rajesh Kumar ◽  
S. Venkat Kumar
Keyword(s):  
Silver Nanoparticles ◽  
Medicinal Plant ◽  
Ag Nanoparticles ◽  
Average Particle Size ◽  
Reducing Power ◽  
Food Preservation ◽  
Average Particle ◽  
Leaf Extracts ◽  
Ic50 Value ◽  
Acalypha Indica

Objective: In the present study, silver (Ag) nanoparticles was synthesized by traditionally used medicinal plant Acalypha indica, which was characterized using various advanced tools, and its antioxidant as well as antimicrobial properties, was studied against food pathogens.Methods: The synthesis of silver (Ag) nanoparticles from the leaf extracts were monitored with the characterization of silver nanoparticles with the help of UV-visible spectrophotometer. The optimized time for the synthesis of nanoparticles was 3 h, followed by fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), surface emission microscopy analysis (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM) and energy dispersive spectroscopy analysis (EDX). The antioxidant activity was evaluated by using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and reducing power assay, while antifungal activity was performed against food pathogens by measuring the zone of inhibition values (ZOI).Results: The Ag nanoparticle produced, have an average particle size of 34 nm with a spherical shape, analyzed from the XRD studies, and size was confirmed with the SEM and TEM analysis. The FTIR analysis gave information about the possible compounds adsorbed on the surface of the Ag nanoparticles. The Ag nanoparticles had good reducing power than the standard and the IC50 value for Ag nanoparticles was 5 mg/ml, while the standard taken had an IC50 value of nearly 6-7 mg/ml. The fungal strain A. fumigates showed ZOI of 133% at 75 µl of concentration proving that Ag nanoparticles can act effectively against this strain when compared to other strains even at low concentrations.Conclusion: The produced Ag nanoparticles can be used for its therapeutic purposes and for large-scale synthesis in food industries for food preservation or packaging. 

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