Dissolution and aggregation of zinc oxide nanoparticles at circumneutral pH; a study of size effects in the presence and absence of citric acid

2011 ◽  
Author(s):  
R-A-Thilini Perera Rupasinghe
Keyword(s):  
Zinc Oxide ◽  
Citric Acid ◽  
Size Effects ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Presence And Absence ◽  
Circumneutral Ph

Dissolution of ZnO Nanoparticles at Circumneutral pH: A Study of Size Effects in the Presence and Absence of Citric Acid

Langmuir ◽  
2011 ◽  
Vol 28 (1) ◽  
pp. 396-403 ◽  
Author(s):  
Imali A. Mudunkotuwa ◽  
Thilini Rupasinghe ◽  
Chia-Ming Wu ◽  
Vicki H. Grassian
Keyword(s):  
Citric Acid ◽  
Zno Nanoparticles ◽  
Size Effects ◽  
Presence And Absence ◽  
Circumneutral Ph

Size effects on electrical properties of chemically grown zinc oxide nanoparticles

2018 ◽  
Vol 5 (3) ◽  
pp. 035040 ◽  
Author(s):  
K N Rathod ◽  
Zalak Joshi ◽  
Davit Dhruv ◽  
Keval Gadani ◽  
Hetal Boricha ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Electrical Properties ◽  
Size Effects ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles

scholarly journals Biosynthesis of Hydroxy Citric Acid Mediated Zinc Nanoparticles and Its Antioxidant and Cytotoxic Activity

2020 ◽  
pp. 108-112
Author(s):  
S. Barani Shankar ◽  
Lakshminarayanan Arivarasu ◽  
S. Rajeshkumar
Keyword(s):  
Zinc Oxide ◽  
Citric Acid ◽  
Cytotoxic Activity ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
High Catalytic Activity ◽  
Garcinia Cambogia ◽  
Zinc Nanoparticles ◽  
Garcinia Indica ◽  
Brine Shrimp Lethality Assay

Aim: To evaluate biosynthesis of hydroxy citric acid mediated zinc nanoparticle and its antioxidant and cytotoxic activity Introduction: Hydroxy citric acid is a chemical that is found in fruit rinds of Garcinia cambogia, Garcinia indica, and Garcinia atroviridis. Hydroxy citric acid is used to improve exercise performance and weight loss. Hydroxy citric acid can cause nausea, digestive tract discomfort, and headache when used short-term. Long-term safety is unknown.Zinc oxide nanoparticles are nanoparticles of zinc oxide that have diameters less than 100 nanometers. Zinc nanoparticles have a large surface area relative to their size and high catalytic activity. The exact physical and chemical properties of zinc oxide nanoparticles depend on the different ways they are synthesized. zinc oxide nanoparticles have also been shown to exhibit strong protein adsorption properties, which can be used to modulate cytotoxicity, metabolism or other cellular responses. Materials and Methods: Evaluation of anti-oxidant was done by DPPH activity and evaluation of cytotoxic activity was done by brine shrimp lethality assay. Colour changes was noted in evaluation of cytotoxic activity Results: The antioxidant activity was exhibited well at higher doses when compared to standard, but there was only 40% of cytotoxicity achieved which indicates its potential.Cytotoxic activity reveals that the drug showed a very good result at a concentration of  25 ul it showed a 40% of lethality thereby showing  that Hydroxycitric acid medicated zinc oxide nanoparticles shows a potent activity when compared to that with the standard. Conclusion: The study concludes that hydroxy citric acid shows good antioxidant and cytotoxic activity.

Size effects on electrical properties of sol–gel grown chromium doped zinc oxide nanoparticles

2018 ◽  
Vol 34 (3) ◽  
pp. 488-495 ◽  
Author(s):  
Zalak Joshi ◽  
Davit Dhruv ◽  
K.N. Rathod ◽  
J.H. Markna ◽  
A. Satyaprasad ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Electrical Properties ◽  
Size Effects ◽  
Zinc Oxide Nanoparticles ◽  
Sol Gel ◽  
Oxide Nanoparticles

Optical Characteristics of Zinc Oxide Nanoparticles with Surface Modification Using Polyethylene Glycol

2014 ◽  
Vol 29 (10) ◽  
pp. 1039
Author(s):  
TAN Man-Lin ◽  
WANG Yan-Tao ◽  
ZHANG Wei-Li ◽  
FU Dong-Ju ◽  
LI Dong-Shuang ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Surface Modification ◽  
Polyethylene Glycol ◽  
Zinc Oxide Nanoparticles ◽  
Optical Characteristics ◽  
Oxide Nanoparticles

A comparative study of the antibacterial activity of Quercus robur (Ethanolic extract) and Zinc oxide nanoparticles on Salmonella (In vitro)

2018 ◽  
Vol 9 (SPL1) ◽  
Author(s):  
Hams H. H. Alfattli ◽  
Ghufran Zuhair Jiber ◽  
Ghaidaa Gatea Abbass
Keyword(s):  
Zinc Oxide ◽  
Antibacterial Activity ◽  
Zinc Oxide Nanoparticles ◽  
Quercus Robur ◽  
Ethanolic Extract ◽  
Inhibitory Effect ◽  
Significant Inhibition ◽  
Oxide Nanoparticles ◽  
Inhibition Zones

This study which designed to evaluate the inhibitory effect of Ethanolic extract of (Quercusrobur) and Zinc oxide nanoparticles on the growth of one genus of enterobacteriacae (Salmonella). In vitro. For this purpose graduate concentrates for plant extract (50, 100, 200, 400 )mg/ml which prepared and compared with Zinc oxide nanoparticles of different concentration (2, 1, 0.5, 0.25) μg/ml,and examined. The result showed that the studied medicinal plant has antibacterial activity against this bacteria which used. The result showed that the plant has good activity in decrease the growth of this bacteria. The results of the study also showed that the nano-ZnO has very effective antibacterial action against the studied bacteria which was Salmonella,nanoparticles concentrations lead to increasing in the inhibition zones of tested bacterial growth. We also study the effect of three antibiotics Lomefloxacin (LOM), Ciprofloxacin (SIP) and Rifampin (RA) and the result showed,in a comparison within the tested bacteria,Salmonella had a significant inhibition increase in Lomefloxacin ; the ciprofloxacin showed effect on tested bacteria. However,Rifampin does not show any effect on tested bacteria.

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