scholarly journals Biosynthesis of Zinc Oxide Nanoparticles using Intracellular Extract of Saccharomyces cerevisiae and Evaluation of its Antibacterial and Antioxidant Activities

2020 ◽  
Vol 28 (4) ◽  
pp. 36-46
Author(s):  
Razieh Motazedi ◽  
Somayeh Rahaiee ◽  
Mahboobeh Zare ◽  
◽  
◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Antioxidant Activities ◽  
Oxide Nanoparticles

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 Optimisation of Zinc Oxide Nanoparticle Biosynthesis Using Saccharomyces Cerevisiae with Box-Behnken Design

2021 ◽  
Vol 72 (1) ◽  
pp. 79-89
Author(s):  
Fitry Mulyani ◽  
M. Diki Permana ◽  
Safri Ishmayana ◽  
Iman Rahayu ◽  
Diana Rakhmawaty Eddy
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Zinc Oxide ◽  
Incubation Time ◽  
Zinc Acetate ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Optimum Conditions ◽  
Box Behnken Design ◽  
Nanoparticle Biosynthesis ◽  
Oxide Nanoparticle

Zinc oxide nanoparticles have wide applications as catalysts, antimicrobial agents, drug delivery agents, etc. because of their intrinsic properties. Various methods can be applied to synthesise nanoparticles, one of which is the biosynthesis process. Biosynthesis is more eco-friendly than chemical and physical methods. In the present study, the optimisation of zinc oxide nanoparticle biosynthesis using the yeast Saccharomyces cerevisiae was performed by applying a response surface method called the Box�Behnken design (BBD). Three factors were optimised in the present study, namely the concentration of zinc acetate as the precursor (X1), concentration of the S. cerevisiae fermentation broth (X2), and the incubation time (X3). The mass of zinc oxide nanoparticles (Y) was recorded as the response of the experiment. The product was then characterised by fourier transform infrared spectroscopy (FTIR), X-Ray diffraction (XRD), scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), and particle size analyser (PSA). The optimum conditions for the preparation of zinc oxide nanoparticles were found to be 0.3 M, 100% (v/v), and 24 h as the zinc acetate concentration, medium concentration, and incubation time, respectively. The FTIR analysis showed peaks at ~600 cm−1, which is characteristic for ZnO stretching. From the XRD result, the ZnO nanoparticles with hexagonal structure was confirm. The SEM/EDS analysis confirmed that the morphology was spherical and showed the major energy emission for zinc and oxygen. Moreover, the PSA analysis revealed that the smallest size was 218.6 nm (12%) when the synthesis was performed at the optimum conditions, while when the incubation time was prolonged for 120 h, the size decreased to 134.2 nm.

Activity evaluation of pure and doped zinc oxide nanoparticles against bacterial pathogens and Saccharomyces cerevisiae

2019 ◽  
Vol 127 (5) ◽  
pp. 1391-1402 ◽  
Author(s):  
V. Zanet ◽  
J. Vidic ◽  
S. Auger ◽  
P. Vizzini ◽  
G. Lippe ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Bacterial Pathogens ◽  
Oxide Nanoparticles ◽  
Activity Evaluation
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