scholarly journals Green synthesis of MgO nanoparticles using Moringa oleifera leaf aqueous extract for antibacterial activity

2021 ◽  
Vol 35 (1) ◽  
pp. 161-170
Author(s):  
A. Fatiqin ◽  
H. Amrulloh ◽  
W. Simanjuntak
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Green Synthesis ◽  
Moringa Oleifera ◽  
X Ray Diffraction ◽  
Mgo Nanoparticles ◽  
Alternative Method ◽  
Leaf Aqueous Extract ◽  
Vis Spectroscopy ◽  
Escherchia Coli

Nanoparticle fabrication using plant extracts is an important alternative method because it is non-toxic, biocompatible, and environmentally friendly. In this study, green synthesis of MgO nanoparticles using Moringa oleifera leaf water extracts was conducted by mixing the extract and a solution of magnesium chloride. The product was characterized using different techniques, i.e. UV-Visible (UV-Vis) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The UV-Vis spectrum of MgO nanoparticles shows an absorption at 280 nm. The size of the synthesized MgO nanoparticles ranges from 20-50 nm. The antibacterial activity of MgO nanoparticles was seen from the zone of inhibition against Staphylococcus aureus (6.3 mm) and against Escherichia coli (6 mm). MgO nanoparticles have been successfully fabricated using Moringa oleifera leaf aqueous extracts, providing an alternative method for synthesizing MgO nanoparticles.                     KEY WORDS: Antibacterial activity, Escherchia coli, MgO nanoparticles, Moringa oleifera, Staphylococcus aureus   Bull. Chem. Soc. Ethiop. 2021, 35(1), 161-170. DOI: https://dx.doi.org/10.4314/bcse.v35i1.14

scholarly journals Green Synthesis of Silver Nanoparticles Using Moringa Oleifera Leaf Extract, Tamarindus Indica Fruit Extract and Assessement of Antibacterial Activity Against Staphylococcus Aureus

2021 ◽  
Author(s):  
Shirisha A ◽  
ANUMOLU VIJAYA KUMAR ◽  
Laxman Chatlod R ◽  
Shashi Kumar M ◽  
Krishnaiah N ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Green Synthesis ◽  
Silver Nitrate ◽  
Leaf Extract ◽  
Moringa Oleifera ◽  
Diffusion Method ◽  
Tamarindus Indica ◽  
Fruit Extract

Abstract The present study mainly deals with the green synthesis, characterization and evaluation of antibacterial properties of silver nanoparticles (AgNPs) synthesized by using the leaf extract of Moringa oleifera and fruit extract of Tamarindus indica. In this study for synthesis of silver nanoparticles different ratios of 1mM silver nitrate and Moringa oleifera leaf extract i.e, 95:5, 90:10 and 85: 15 was taken in conical flask and kept for one 1 hr at 25 0 c on magnetic stirrer, out of which 90:10 ratio was selected for further study based on highest peak, good size and stability. Tamarindus indica fruit extract was added to silver nitrate solution till the colour of the solution changes from light brown to chocolate brownish colour. The synthesized silver nanoparticles were characterized by UV-Visible spectroscopy, Zeta potential, size distribution by intensity. The absorption spectrum of the silver nano solution prepared by using Moringa oleifera and Tamarindus indica fruit extract showed a surface plasmon absorption band with maximum of 420 nm and 430 nm respectively indicating the presence of silver nanoparticles. The zeta value of silver nanoparticles synthesized from Moringa oleifera and Tamarindus indica fruit extract was -12.5 mV and -15.5 mV, size of 110.2 nm and 130.2 nm respectively. The antibacterial efficacy of nanosilver was checked by agar well diffusion method, and the silver nanoparticles showed effective antibacterial activity against Staphylococcus aureus.

scholarly journals Anion Induced Synthesis, Structural Characterization and Antibacterial Activity of Zinc(II) Complexes Derived from 5-Bromo-2-((2-(diethylamino)ethylimino)methyl) phenol

2021 ◽  
Vol 68 (3) ◽  
pp. 693-699
Author(s):  
Huan-Yu Liu ◽  
Xiang Gan ◽  
Jin-Yan Ding ◽  
Zhi-Tao Li ◽  
Qiao Chen
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Candida Albicans ◽  
Tetrahedral Coordination ◽  
X Ray Diffraction ◽  
X Ray ◽  
Trigonal Bipyramidal ◽  
Vis Spectroscopy ◽  
Zinc Salts

By changing the anions of zinc salts, three different zinc(II) complexes, [Zn2(HL)2(NCS)4]·2CH3OH (1), [Zn2L(μ2-η1:η1-CH3COO)2(NCS)] (2) and [Zn(HL)I2]·CH3OH (3), where L = 5-bromo-2-((2-(diethylamino)ethylimino)methyl)phenolate, HL = 5-bromo-2-((2-(diethylammonio)ethylimino)methyl)phenolate, have been synthesized and characterized by IR and UV-Vis spectroscopy, as well as single-crystal X-ray diffraction. X-ray analysis indicates that the Zn atoms in the complexes are in trigonal bipyramidal, square pyramidal and tetrahedral coordination. The anions of the zinc salts lead to the formation of different structures of the complexes. Antibacterial activity of the complexes against Staphylococcus aureus, Escherichia coli, Klebsielle pneumoniae and Candida albicans strains was studied.

scholarly journals Biosynthesized gold nanoparticles-doped hydroxyapatite as antibacterial and antioxidant nanocomposite

2021 ◽  
Author(s):  
Is Fatimah ◽  
Putwi Widya Citradewi ◽  
Amri Yahya ◽  
Bambang Nugroho ◽  
Habibi Hidayat ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Antioxidant Activity ◽  
Particle Size ◽  
Gold Nanoparticles ◽  
Antibacterial Activity ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Dpph Scavenging Activity ◽  
Dpph Scavenging

Abstract The composite of green synthesized gold nanoparticles (Au NPs)-doped hydroxyapatite (HA) has been prepared. The gold nanoparticles were produced via bioreduction of HAuCl4 with Clitoria ternatea flower extract, and utilized in the synthesis of hydroxyapatite using Ca(OH)2 and ammonium diphosphate as precursor. The aim of this research is to study the structural analysis of the composite and antibacterial activity test toward Eschericia coli, Staphylococcus aureus, Klebsiela pneumoniae, and Streptococcus pyogenes. In addition, the antioxidant activity was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging method. The monitoring of gold nanoparticles formation was conducted by UV–vis spectroscopy and particle size analyses, meanwhile the synthesized composite was studied using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results showed that homogeneously dispersed gold nanoparticles in HA structure was obtained with the particle size ranging at 5-80 nm. The nanocomposite demonstrated antibacterial activity against tested bacteria. The nanocomposite expressed an antioxidant activity as shown by the DPPH scavenging activity of 66 and 58% at the concentration of 100 μg/mL and 50 μg/mL, respectively.

Antibacterial Activity of Nickel -Doped ZnO\MWCNTs hybrid Prepared by Sol-Gel technique

2021 ◽  
Author(s):  
Selma M.H. AL-Jawad ◽  
Zahraa S. Shakir ◽  
Duha S. Ahmed
Keyword(s):  
Antibacterial Activity ◽  
Sol Gel ◽  
Inhibition Zone ◽  
Sem Analysis ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
Zno Nps ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Doped Zno

ZnO/MWCNTs hybrid and doped with different concentration of Nickel element prepared by using Sol-gel been technique reported. All samples were prepared and characterized by X-Ray Diffraction Analysis (XRD), Energy Dispersive X-ray Spectroscopy (EDS), Fourier-Transform Infrared Spectroscopy (FTIR), Field-Emission Scanning Electron Microscopy (FE-SEM), and UV-Vis spectroscopy have been identified the structural, optical and morphological properties. X-ray diffraction showed the polycrystalline nature with hexagonal wutzite structure of hybrid and doped with Nickel. The crystalline size of the hybrid nanostructure was increasing from 23.73 nm to 34.59 nm. Besides, the UV-Vis spectroscopy showed a significant decrease in the band gap values from 2.97 eV to 2.01 eV. Whereas the FE-SEM analysis confirm the formation spherical shapes of ZnO NPs deposited on cylindrical tubes representing the MWCNTs. The antibacterial activity reveals that the inhibition zone of Ni doped-ZnO/MWCNTs hybrid was 28.5 mm, 26.5 mm toward E. coli and S. aureus bacteria, respectively.

scholarly journals Effect of Various Parameters on Bio-Synthesis of Copper Nanoparticles Using Citrus Medica Linn (Lemon) Extract and Its Antibacterial Activity

2020 ◽  
Vol 1 (1) ◽  
pp. 51-58
Author(s):  
Sharmila Pradhan ◽  
Rajeswori Shrestha ◽  
Khuma Bhandari
Keyword(s):  
Antibacterial Activity ◽  
Copper Nanoparticles ◽  
Color Change ◽  
Diffusion Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Crystalline Nature ◽  
Bio Synthesis

This research is focused on bio-synthesis of Copper nanoparticles (CuNPs) using lemon extract to study the effect of various parameters on synthesis and to explore antibacterial activity. The biomolecules present in lemon extract act as self reducing and stabilizing agent. The synthesis of CuNPs was found to be affected by various parameters like volume of the lemon extract, concentration of the precursor and the temperature etc. Preliminary characterization of formation of nanoparticles were done by color change and UV-visible (UV-vis) spectroscopy. Elemental composition of the prepared sample was determined via Energy Dispersive X-ray (EDX) Spectroscopy. Presence of important functional groups associated with biomolecules is well characterized by Fourier Transform Infrared spectroscopy (FTIR). Scanning Electron Microscopy (SEM ) revealed the formation agglomerated CuNPs of different shape and sizes and the X-ray diffraction pattern showed the formation of purely crystalline nature of CuNPs. Finally, agar well diffusion method showed that CuNPs have potential antibacterial activity against Gram-ve bacteria compared to Gram +ve bacteria.

scholarly journals Biosynthesis, Characterization, and Antidermatophytic Activity of Silver Nanoparticles Using Raamphal Plant (Annona reticulata) Aqueous Leaves Extract

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
P. Shivakumar Singh ◽  
G. M. Vidyasagar
Keyword(s):  
Silver Nanoparticles ◽  
Chemical Compounds ◽  
Visual Observation ◽  
X Ray Diffraction ◽  
Tem Analysis ◽  
X Ray ◽  
Leaf Aqueous Extract ◽  
Vis Spectroscopy ◽  
Antidermatophytic Activity ◽  
Annona Reticulata

The present work investigated the biosynthesis of silver nanoparticles using Annona reticulata leaf aqueous extract. The biosynthesised silver nanoparticles were confirmed by visual observation and UV-Vis spectroscopy. Appearance of dark brown colour indicated the synthesis of silver in the reaction mixture. The silver nanoparticles were found to be spherical, rod, and triangular in shape with variable size ranging from 23.84 to 50.54 nm, as evident by X-ray diffraction studies, TEM. The X-ray diffraction studies, energy dispersive X-ray analysis, and TEM analysis indicate that the particles are crystalline in nature. The nanoparticles appeared to be associated with some chemical compounds which possess hydroxyl and carbonyl groups, confirmed by FTIR. This is the first and novel report of silver nanoparticles synthesised from Annona reticulata leaves extract and their antidermatophytic activity.

scholarly journals Antibacterial Activity of Biologically Synthesized Silver and Zinc Nanoparticles Using Allcemilla vulgaris (Layd’s Mantle) Leaf Extract

2019 ◽  
pp. 1-11
Author(s):  
Dilek Demirezen-Yilmaz ◽  
Fatih Doğan Koca ◽  
Nurhan Ertaş-Onmaz
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Inhibitory Concentration ◽  
Escherichia Coli O157 ◽  
X Ray Diffraction ◽  
Zinc Nanoparticles ◽  
X Ray ◽  
Vis Spectroscopy ◽  
And Staphylococcus Aureus ◽  
Antibacterial Potential

In this study, the powder of Allcemilla vulgaris was used in the sythesis of silver and zinc nanoparticle. Biologically synthesized nanoparticles were characterized using Scanning Electron Microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), UV-Vis spectroscopy, X-ray diffraction (XRD) and Zeta potential and then evaluated for antibacterial potential using micro dilution broth method. The minimum inhibitory concentration values of AgNP were 4.25 µg/mL and 6.64 µg/ mL for Escherichia coli O157:H7 and Staphylococcus aureus, respectively. Similarly, the MIC values of ZnNP were 3.32 µg/mL and 6.25 µg/mL, respectively for Escherichia coli O157:H7 and Staphylococcus aureus.

Green Synthesis of Silver Nanoparticles Using Olden-landia corymbosa and Ocimum sanctum Leaf Aqueous Extract

2020 ◽  
Vol 13 (3) ◽  
pp. 4959-4964
Author(s):  
Prof.(Dr.) Sirshendu Chatterjee Chatterjee ◽  
Shaktijit Das ◽  
Moumita Saha ◽  
Pranabesh Ghosh ◽  
Titav Sengupta ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Green Synthesis ◽  
Aqueous Extract ◽  
Nano Particles ◽  
Bioactive Molecules ◽  
Primary Amines ◽  
Ocimum Sanctum ◽  
Leaf Aqueous Extract ◽  
Vis Spectroscopy ◽  
Ft Ir

The field of nanotechnology is the most renowned area of research in modern day science. One of the most convenient and comprehensive technique related to the synthesis of nanoparticles using plant extracts and their subsequent action. On the other hand, herbal medicines become an integral part of modern-day treatment strategy around the globe; combination of these two ways are widely accepted and beneficial due to its low cost, better societal recognition and less side effects. Phytochemical analysis revealed that leaf aqueous extract of two medicinal plants Oldenlandia corymbosa and Ocimum sanctum, harbours high concentration of antioxidants and bioactive molecules. Hence our present course of study aims at the green synthesis of silver nano-conjugates using Oldenlandia corymbosa and Ocimum sanctum leaf aqueous extracts. The synthesized nano-conjugates have undergone advanced chara-cterization techniques including UV-Vis Spectro-photometry, DLS, and FT-IR. The UV-Vis spectroscopy results showed single peak at 420 nm and 430 nm for Oldenlandia corymbosa and Ocimum sanctum nano-conjugates, respectively. The particle size for Oldenlandia corymbosa and Ocimum sanctum nano-particles are 21.04 nm and 24.36 nm, respectively as observed from the DLS data, and finally, the FT-IR data confirms the conjugation of bioactive molecules of the medicinal plants indicating that primary amines, secondary amines, alcohols, phenols, aldehydes, aliphatic amines, alkenes, functional groups of the bioactive molecules are responsible for the stability of prepared silver nano-conjugates

scholarly journals Green synthesis characterization and antimicrobial activity against Staphylococcus aureus of silver nanoparticles using extracts of neem, onion and tomato

RSC Advances ◽  
2019 ◽  
Vol 9 (30) ◽  
pp. 17002-17015 ◽  
Author(s):  
Kishore Chand ◽  
M. Ishaque Abro ◽  
Umair Aftab ◽  
Ahmer Hussain Shah ◽  
Muhammad Nazim Lakhan ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Green Synthesis ◽  
Neem Leaves

The silver nanoparticles were synthesized from the neem leaves, onions, and tomato extracts, and the antibacterial activity of the particles was studied.

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