scholarly journals Maranta arundinacea root assisted zinc oxide nanoparticles and its characterisation using TEM and UV-vis spectroscopy

2020 ◽  
Vol 11 (3) ◽  
pp. 2968-2972
Author(s):  
Nivedhita G ◽  
Rajeshkumar S ◽  
Anitha Roy ◽  
Nagalingam M ◽  
Lakshmi T
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Zinc Sulphate ◽  
Biomedical Application ◽  
Radical Scavenging ◽  
Oxide Nanoparticles ◽  
Root Extract ◽  
Vis Spectroscopy ◽  
Nanoparticles Synthesis ◽  
Arrow Root

Arrow root is a tropical root crop cultivated for its starchy rhizomes that have carbohydrate contents. Zinc oxide nanoparticles have emerged a promising potential in biomedicine, especially in the fields of anticancer, wound healing, free radical scavenging and antimicrobial including antibacterial, antifungal and antiviral research fields, which might be worried with their potent ability to trigger extra reactive oxygen species (ROS) production, launch zinc ions, and induce mobile apoptosis. 1 gram of Arrow root powder extract was mixed with 100 mL of water and filtered for nanoparticles synthesis. The zinc sulphate was used as a precursor for the zinc oxide nanoparticles synthesis and 30 mM was used. 50 mL of freshly prepared root extract and zinc sulphate solution was added together for the synthesis of Zinc oxide nanoparticles, which was then dried and characterisedcharacterized using transmission electron microscope (TEM) and during reaction it was characterized using UVvis spectroscopy method. A spherical shaped nanoparticle with plant extract in the background was observed. The peak at 300 nm confirm the nanoparticles synthesis using root extract. Based on our results we confirmed the capability of arrow root for the zinc oxide nanoparticles synthesis and it will be used for the various biomedical application in future.

Sunflower Assisted Bio-derived ZnO-NPs as an Efficient Nanocatalyst for Synthesis of Novel Quinazolines with Highly Antioxidant Activities

2021 ◽  
Author(s):  
Balaji GL ◽  
S. Mahesh ◽  
Boya Palajonnala Narasaiah ◽  
Sadegh Rostamnia ◽  
Harihara Padhy ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Antioxidant Activities ◽  
Present Report ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Oxide Nanoparticles ◽  
Zno Nps ◽  
Green Method ◽  
Vis Spectroscopy

Abstract The present report an environmental benign route for the fabrication of Zinc Oxide nanoparticles (ZnO-NPs) using sunflower leaf aqueous extract at room temperature. This was an green method is a rapid biogenic and offers few advantages over the chemical and physical procedures, as it is an easy and fast, eco-friendly and does not involve any costly chemicals as well as hazardous chemicals, harmful solvent. The synthesized ZnO-NPs were characterized using different technique such as UV-Visible spectroscopy. The formation of ZnO-NPs was confirmed by Surface Plasmon Resonance (SRP) at 344 nm using UV-Vis spectroscopy. The leaf extract act as a source of phyto-chemicals and are the primarily responsible for the reduction and then formation of stable Zinc Oxide nanoparticles by the characteristic functional groups of extract and synthesized ZnO-NPs were identified by FTIR spectroscopy. Crystalline nature of ZnO-NPs was confirmed by powder –XRD. Size and morphology were measured by HR-TEM analysis. Stability of the nanoparticles is represented by DLS and TGA analysis. The synthesized ZnO-NPs has been found good and efficient catalyst for the synthesis of novel 1,2-dihydroquinazoline derivatives under green method via one pot reaction of 2-amino benzophenone, 1,3-diphenyl-1 H -pyrazole carbaldehydes and ammonium acetate. The synthesized compounds (4a-o) were characterized by 1 HNMR, 13 CNMR and HRMS spectra and further screened for radical scavenging activity. Among all the compounds showed good percentage of inhibition against standard ascorbic acid. The synthesized ZnO nanoparticles showed good antioxidant activity and also act as a good promising material for catalytic agent.

scholarly journals Free Radical Scavenging Activity of Fruit Formulation Mediated Zinc Oxide Nanoparticles

2020 ◽  
Vol 11 (3) ◽  
pp. 4690-4694
Author(s):  
Tahoora Taskeen. L ◽  
Hannah R ◽  
Rajeshkumar S
Keyword(s):  
Antioxidant Activity ◽  
Zinc Oxide ◽  
Free Radicals ◽  
Zinc Oxide Nanoparticles ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Punica Granatum ◽  
Free Radical Scavenging ◽  
Oxide Nanoparticles ◽  
Scavenging Activity

To determine the free radical scavenging activity of fruit formulation mediated zinc oxide nanoparticle. Zinc oxide nanoparticles are widely known for their antimicrobial agent, anti-diabetic, anti-inflammatory, wound healing, antioxidant and optic properties. Oxidative degradation of lipids, proteins, food and cosmetics involves a radical-chain reaction with release of free radicals. These free radicals are extremely reactive and can even attack relatively stable molecules like the DNA bases. With a recent rise in diseases associated with increased oxidative stress, a good antioxidant seems to be the need of the hour. Synthesis of zinc oxide nanoparticles using Punica granatum and Elettaria cardamomum extract. Characterisation of the nanoparticles using UV–Visible spectroscopy and Scanning electron microscope. It is followed by the DPPH radical scavenging assay to determine the antioxidant activity. With an increase in the concentration of zinc oxide nanoparticles, there was an increase in the percentage of inhibition. When compared to the standard, the zinc oxide nanoparticles showed increased antioxidant activity even in small concentrations. Punica granatum and Elettaria cardamomum mediated Zinc oxide nanoparticles showed considerable antioxidant property even in small quantity when compared with standard vitamin C. Further studies need to be carried out to check for its potency as a prophylactic agent.

Zinc oxide nanoparticles: Synthesis, antiseptic activity and toxicity mechanism

2017 ◽  
Vol 249 ◽  
pp. 37-52 ◽  
Author(s):  
A. Król ◽  
P. Pomastowski ◽  
K. Rafińska ◽  
V. Railean-Plugaru ◽  
B. Buszewski
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Toxicity Mechanism ◽  
Nanoparticles Synthesis

scholarly journals 131I Labeled Zinc Oxide Nanoparticles: Synthesis, Labeling with 131I and in Vitro Uptake Studies on U87-Mg Cells

2015 ◽  
Vol 24 (1) ◽  
pp. 42-43 ◽  
Author(s):  
Özge Kozgus Güldü ◽  
Volkan Tekin ◽  
Perihan Unak ◽  
Emin İlker Medine ◽  
Fazilet Zümrüt Biber Müftüler ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Nanoparticles Synthesis ◽  
Uptake Studies ◽  
In Vitro Uptake

Green-synthesized Zinc Oxide Nanoparticles from Aqueous Root Extract of Dicoma anomala (Sond.) Mitigates Free Radicals and Diabetes-linked Enzymes

2020 ◽  
Vol 10 (6) ◽  
pp. 918-929
Author(s):  
F.O. Balogun ◽  
A.O.T. Ashafa
Keyword(s):  
Zinc Oxide ◽  
Free Radicals ◽  
Zinc Oxide Nanoparticles ◽  
Alpha Amylase ◽  
Oxide Nanoparticles ◽  
Root Extract ◽  
Metal Chelating ◽  
Transmission Electron ◽  
Hydrolyzing Enzymes ◽  
Alpha Glucosidase

Background: The emergence of eco-friendly methods for the synthesis of metallic nanostructures has continued to receive wider acceptance. Objective: The study investigated the effect of biologically-synthesized ZnO nanoparticles on free radicals and carbohydrate-hydrolyzing enzymes. Methods: The characterized nanoparticles, DaZnONPs (Dicoma anomala zinc oxide nanoparticles) were obtained using ultraviolet-visible spectroscopy, transmission electron microscopy, Fourier- transform infrared spectroscopy (FTIR), energy dispersive spectroscopy, and X-ray diffraction technique (XRD). The activity of the synthesized nanostructures against 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS), metal chelating, alpha-amylase and alpha-glucosidase was determined using standard methods. Results: DaZnONPs were observed to be stable, mostly cubical in shape and within the nanometre size range. Optimum absorption of DaZnONPs was observed at 386 nm. The FTIR analysis indicated the presence of functional groups arising from alkaloids, flavonoids, tannins, and saponins (detected in earlier reports) and indicate potential nucleation and stability of the ZnONPs. XRD result depicted similar patterns of DaZnONPs and standard ZnO spectra, revealing a hexagonal and crystalline nature of the particles in nanometre range as shown by the obtained peaks. DaZnONPs inhibited DPPH (0.54 μgmL-1 and alpha-amylase (104.34 μgmL-1 better than quercetin (349.98 μgmL-1 and acarbose (594. 54 μgmL-1. Meanwhile, the metal chelating effect of DaZnONPs (30.41 μgmL-1 was observed to be insignificantly (p>0.05) at par with quercetin (27.81 μgmL-1. The kinetics of alpha-amylase and alpha-glucosidase enzymes by DaZnOnPs was observed to be non-competitive inhibitions. Conclusion: DaZnONPs (as against the bulk extract) could be explored as possible antioxidative and antihyperglycaemic agents mitigating the adverse effects of free radicals and hyperglycaemia.

Zinc Oxide Nanoparticles: Synthesis, Antimicrobial Activity and Food Packaging Applications

2012 ◽  
Vol 5 (5) ◽  
pp. 1447-1464 ◽  
Author(s):  
Paula Judith Perez Espitia ◽  
Nilda de Fátima Ferreira Soares ◽  
Jane Sélia dos Reis Coimbra ◽  
Nélio José de Andrade ◽  
Renato Souza Cruz ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Food Packaging ◽  
Oxide Nanoparticles ◽  
Nanoparticles Synthesis

Pectin based banana peel extract as a stabilizing agent in zinc oxide nanoparticles synthesis

2020 ◽  
Vol 165 ◽  
pp. 1581-1592
Author(s):  
Anna Dmochowska ◽  
Joanna Czajkowska ◽  
Roman Jędrzejewski ◽  
Wojciech Stawiński ◽  
Paweł Migdał ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Banana Peel ◽  
Oxide Nanoparticles ◽  
Stabilizing Agent ◽  
Nanoparticles Synthesis ◽  
Peel Extract
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