Enhancement of antibacterial properties of silver nanoparticles–ceftriaxone conjugate through Mukia maderaspatana leaf extract mediated synthesis

2015 ◽  
Vol 121 ◽  
pp. 135-141 ◽  
Author(s):  
Muthukumar Harshiny ◽  
Manickam Matheswaran ◽  
Gangasalam Arthanareeswaran ◽  
Shanmugam Kumaran ◽  
Shanmuganathan Rajasree
Keyword(s):  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Antibacterial Properties

scholarly journals Microwave-Assisted Green Synthesis of Silver Nanoparticles Using Juglans regia Leaf Extract and Evaluation of Their Physico-Chemical and Antibacterial Properties

Antibiotics ◽  
2018 ◽  
Vol 7 (3) ◽  
pp. 68 ◽  
Author(s):  
Mahsa Eshghi ◽  
Hamideh Vaghari ◽  
Yahya Najian ◽  
Mohammad Najian ◽  
Hoda Jafarizadeh-Malmiri ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Juglans Regia ◽  
Antibacterial Properties ◽  
Infrared Analysis ◽  
Ag Nps ◽  
Stabilizing Agents ◽  
Agno3 Solution ◽  
Transmission Electron ◽  
Vis Spectroscopy

Silver nanoparticles (Ag NPs) were synthesized using Juglans regia (J. regia) leaf extract, as both reducing and stabilizing agents through microwave irradiation method. The effects of a 1% (w/v) amount of leaf extract (0.1–0.9 mL) and an amount of 1 mM AgNO3 solution (15–25 mL) on the broad emission peak (λmax) and concentration of the synthesized Ag NPs solution were investigated using response surface methodology (RSM). Fourier transform infrared analysis indicated the main functional groups existing in the J. regia leaf extract. Dynamic light scattering, UV-Vis spectroscopy and transmission electron microscopy were used to characterize the synthesized Ag NPs. Fabricated Ag NPs with the mean particle size and polydispersity index and maximum concentration and zeta potential of 168 nm, 0.419, 135.16 ppm and −15.6 mV, respectively, were obtained using 0.1 mL of J. regia leaf extract and 15 mL of AgNO3. The antibacterial activity of the fabricated Ag NPs was assessed against both Gram negative (Escherichia coli) and positive (Staphylococcus aureus) bacteria and was found to possess high bactericidal effects.

Antibacterial properties of biosynthesized silver nano particles

2020 ◽  
Vol 4 (1) ◽  
pp. 1-5
Author(s):  
Krishna Reddy BV ◽  
Avinash Kumar G ◽  
Nageswara Rao G
Keyword(s):  
Staphylococcus Aureus ◽  
Silver Nanoparticles ◽  
Large Scale ◽  
Leaf Extract ◽  
Antibacterial Agents ◽  
Uv Spectroscopy ◽  
Antibacterial Properties ◽  
Nano Particles ◽  
Lannea Coromandelica ◽  
Cost Efficacy

Nanoparticles have their demand in various fields of science and technology and their applications extend even in medical and pharmaceutical arena. 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 will focus on the preparation of nano particles of silver with the help of purified leaf extract from Lannea coromandelica and evaluation of the same using UV-Vis Spectrophotometry. The nanoparticles exhibited surface plasmon resonance at 420nm in UV spectroscopy. Futhermore, nanoparticles have been evaluated for their antibacterial activity on Putida vulgaris, Staphylococcus aureus, and Bacillus subtillis. The results proved the eco friendly synthesized silver nanoparticles have a good antibacterial and can be used effectively in therapies targeting infections and infectious wounds.

scholarly journals Green synthesis of silver nanoparticles using a Melissa officinalis leaf extract with antibacterial properties

2017 ◽  
Vol 7 ◽  
pp. 2639-2643 ◽  
Author(s):  
Álvaro de Jesús Ruíz-Baltazar ◽  
Simón Yobbany Reyes-López ◽  
Daniel Larrañaga ◽  
Miriam Estévez ◽  
Ramiro Pérez
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Leaf Extract ◽  
Antibacterial Properties ◽  
Melissa Officinalis

scholarly journals Green synthesized silver nanoparticles loaded PVA/Starch cryogel scaffolds with antibacterial properties

2019 ◽  
Vol 13 (1) ◽  
pp. 1-6
Author(s):  
Didem Demir ◽  
Seda Ceylan ◽  
Gülşah Gül ◽  
Zeynep İyigündoğdu ◽  
Nimet Bölgen
Keyword(s):  
Tissue Engineering ◽  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Composite Scaffold ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Infection Site ◽  
Engineering Applications ◽  
Aloe Barbadensis ◽  
Green Synthesized Silver Nanoparticles

In this study, Polyvinyl alcohol/Starch (PVA/Starch) cryogel scaffolds were combined with antibacterial silver nanoparticles (AgNPs), and the antimicrobial properties of composite scaffolds were determined for potential in tissue engineering applications. The porous PVA/Starch scaffolds were prepared by cryogelation technique. The nanoparticles were prepared by green synthesis from Aloe barbadensis leaf extract and characterized. The antibacterial, antifungal and antiyeast properties of AgNPs and AgNPs loaded PVA/Starch cryogel scaffolds were investigated. The highest antimicrobial activity of composite scaffold was found against Pseudomonas aeruginosa. Based on our studies, the results indicate that biodegradable, biocompatible and antimicrobial AgNPs loaded PVA/Starch scaffolds have potential to be used at an infection site in tissue engineering applications.

scholarly journals Phyllanthus reticulatus mediated synthesis and characterization of silver nanoparticles and its antibacterial activity against gram positive and gram negative pathogens

2019 ◽  
Vol 10 (4) ◽  
pp. 3099-3106 ◽  
Author(s):  
Gomathi M ◽  
Prakasam A ◽  
Rajkumar P.V ◽  
Rajeshkumar S ◽  
Chandrasekaran R ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Leaf Extract ◽  
Antibacterial Properties ◽  
Spherical Shape ◽  
Morphological Properties ◽  
Gram Positive ◽  
Gram Negative ◽  
Sem Image ◽  
Structural Surface

In this study, silver nanoparticles were successfully synthesized by using Phyllanthus reticulatus leaf extract at different concentration (5, 10, 15 mL). The prepared samples were analyzed their optical, structural, surface morphological properties, and along with these properties, the antibacterial properties were analyzed. The UV-vis absorption spectra show SPR band around 450 nm, shift to lower wavelength due to increasing extract concentration. This shift can be ascribing to a decrease in particle size. The crystallinity nature of the prepared samples is observed by the XRD profile; the calculated particles size by Scherrer’s formula displays a decrease in size with respect to leaf extract volume. From the SEM image, it can be seen that irregular and large size particles prepared at 5-10 mL and the smooth spherical shape and tiny particles were observed in the sample prepared at 15 mL. The small and spherical shape nanoparticles show good antibacterial activity against gram positive and negative bacterial pathogens. The activity of large and irregular shape particles may be due to the release of Ag+ ions and generation of ROS. Because of cell wall difference in bacteria, the better activity is observed against gram negative bacteria.

scholarly journals Ecofriendly Synthesis of Silver Nanoparticles Using Ethno Medicinal Plant Leaf Extract (Jasminum auriculatum) and their Antibacterial Properties

2015 ◽  
Vol 58 ◽  
pp. 113-121 ◽  
Author(s):  
S. Balasubramanian ◽  
U. Jeyapaul ◽  
S. Mary Jelastin Kala
Keyword(s):  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Antibacterial Properties ◽  
Cost Effective ◽  
Average Diameter ◽  
Xrd Analysis ◽  
Antibacterial Activities ◽  
Aqueous Leaf Extract ◽  
Plant Leaf Extract

The present investigation, we describe a cost effective biofabrication of silver nanoparticles using jasminum auriculatum leaf extract. The aqueous leaf extract of jasminum auriculatum are used as reducing agent and capping agent in silver nanoparticles synthesis. The biofabricated silver nanoparticles were characterized by UV-Visible spectrophotometer, X-Ray Diffraction, FTIR spectra and SEM with EDX analysis. FTIR studies revealed that the functional group responsible for silver reduction were found to be jasminol and triterpinoid compounds present in leaf extract. XRD analysis showed that prepared silver nanoparticles are crystalline in nature with an average diameter of 15-20 nm. The prepared silver nanoparticles have been evaluated in vitro for antibacterial activities and found to have higher antibacterial activities.

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