Role of Surface Adsorbed Anionic Species in Antibacterial Activity of ZnO Quantum Dots Against Escherichia coli

2009 ◽  
Vol 9 (11) ◽  
pp. 6427-6433 ◽  
Author(s):  
Prachi Joshi ◽  
Soumyananda Chakraborti ◽  
Pinak Chakrabarti ◽  
D. Haranath ◽  
Virendra Shanker ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Quantum Dots ◽  
Antibacterial Activity ◽  
Anionic Species ◽  
Zno Quantum Dots

scholarly journals ZnO quantum dots anchored in multilayered and flexible amorphous carbon sheets for high performance and stable lithium ion batteries

2019 ◽  
Vol 7 (14) ◽  
pp. 8460-8471 ◽  
Author(s):  
Joseph F. S. Fernando ◽  
Chao Zhang ◽  
Konstantin L. Firestein ◽  
Jawahar Y. Nerkar ◽  
Dmitri V. Golberg
Keyword(s):  
Quantum Dots ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Amorphous Carbon ◽  
High Performance ◽  
Lithium Ion ◽  
Carbon Anode ◽  
Zno Quantum Dots

The role of the carbonaceous component in the excellent (de)lithiation properties of a ZnO/carbon anode material, as revealed by in situ TEM.

scholarly journals Pharmacological Role of Anions (Sulphate, Nitrate, Oxalate and Acetate) on the Antibacterial Activity of Cobalt(II), Copper(II) and Nickel(II) Complexes With Nicotinoylhydrazine-Derived ONO, NNO and SNO Ligands

1996 ◽  
Vol 3 (5) ◽  
pp. 211-217 ◽  
Author(s):  
Zahid Hussain Chohan ◽  
Abdur Rauf
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Metal Ion ◽  
Bacterial Species ◽  
Biologically Active ◽  
Schiff Base Ligands ◽  
Mixed Ligands ◽  
And Staphylococcus Aureus

Mixed ligands biologically active complexes of cobalt(II), copper(II) and nickel(II) with nicotinoylhydrazine-derived ONO, NNO and SNO donor schiff-base ligands having the same metal ion but different anions such as sulphate, nitrate, oxalate and acetate have been synthesised and characterised on the basis of their physical, analytical and spectral data. In order to evaluate the role of anions on their bioability, these ligands and their synthesised metal complexes with various anions have been screened against bacterial species such as Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus and the title studies have proved a definative role of anions in increasing the biological activity

scholarly journals Abnormal gas pressure sensitivity of the visible emission in ZnO quantum dots prepared by improved sol–gel method: the role of surface polarity

RSC Advances ◽  
2017 ◽  
Vol 7 (48) ◽  
pp. 29992-29997 ◽  
Author(s):  
Xiaoman Ma ◽  
Honggang Ye ◽  
Xiangyang Duan ◽  
Chu Li ◽  
Gaoming Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Sol Gel ◽  
Gas Pressure ◽  
Visible Emission ◽  
Pressure Sensitivity ◽  
Surface Polarity ◽  
Band Bending ◽  
Gel Method ◽  
Zno Quantum Dots

Polar surface induced band bending leads to the abnormal gas pressure sensitivity of visible emission in ZnO quantum dots.

Dual role of the reactant MOH (M=Li, Na or K) in the growth of ZnO quantum dots under a sol–gel process: promoter and inhibitor

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 50173-50179 ◽  
Author(s):  
Song Li ◽  
Song Ye ◽  
Tianhua Liu ◽  
Zhuang Guo ◽  
Huiyun Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Sol Gel ◽  
Dual Role ◽  
Synthesis Process ◽  
Sol Gel Process ◽  
Zno Quantum Dots ◽  
Sol Gel Synthesis

ZnO quantum dots (QDs) with tunable size and photoluminescence can be achieved simply by controlling their growth during the sol–gel synthesis process.

Antibacterial activity of ZnO quantum dots and its protective effects of chicks infected with Salmonella pullorum

2021 ◽  
Vol 32 (50) ◽  
pp. 505104
Author(s):  
Yunchun Li ◽  
Songtao Xie ◽  
Dan Xu ◽  
Gang Shu ◽  
Xianxiang Wang
Keyword(s):  
Quantum Dots ◽  
Antibacterial Activity ◽  
Protective Effects ◽  
Salmonella Pullorum ◽  
Zno Quantum Dots

scholarly journals Antibacterial Activity of Borassus flabellifer Vinegar-Graphene Quantum Dots Against Gram-Positive and Gram-Negative Bacteria

2021 ◽  
Vol 33 (11) ◽  
pp. 2662-2666
Author(s):  
Amnuay Noypha ◽  
Paweena Porrawatkul ◽  
Nongyao Teppaya ◽  
Parintip Rattanaburi ◽  
Saksit Chanthai ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Quantum Dots ◽  
Antibacterial Activity ◽  
Graphene Quantum Dots ◽  
Diffusion Method ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
E Coli

Borassus flabellifer vinegar–graphene quantum dots (BFV-GQDs) were successfully synthesized using a pyrolysis method with Borassus flabellifer vinegar (BFV) as the precursor. All the samples were characterized using ultraviolet-visible spectrophotometry (UV-Vis), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The antibacterial activities of BFV-GQDs against strains of Gram-negative bacteria (Escherichia coli) and Gram-positive bacteria (Staphylococcus aureus) were determined using the agar well diffusion method for preliminary screening, while minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined using the broth macro-dilution method. The zones of inhibition were compared with those of citric acid–graphene quantum dots (CA-GQDs). It was observed that the synthesized BFV-GQDs demonstrated excellent antibacterial activity against Staphylococcus aureus (82.3%) and good antibacterial activity against Escherichia coli (73.3%). The MIC of BFV-GQDs against E. coli was 6.25 mg/mL and S. aureus was 12.5 mg/mL, whereas the MBC of BFV-GQDs against E. coli was 12.5 mg/mL and S. aureus was 25.0 mg/mL.

scholarly journals ZnO quantum dots modified bioactive glass nanoparticles with pH-sensitive release of Zn ions, fluorescence, antibacterial and osteogenic properties

2016 ◽  
Vol 4 (48) ◽  
pp. 7936-7949 ◽  
Author(s):  
Kai Zheng ◽  
Miao Lu ◽  
Bogdan Rutkowski ◽  
Xinyi Dai ◽  
Yuyun Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Antibacterial Activity ◽  
Quantum Dot ◽  
Bioactive Glass ◽  
Ph Sensitive ◽  
Zno Quantum Dots ◽  
Zn Ions

Zn containing bioactive glass nanoparticles fabricated by ZnO quantum dot coating of BG nanoparticles exhibit apatite forming ability, antibacterial activity and non-cytotoxicity.

scholarly journals Chloramphenicol Is a Substrate for a Novel Nitroreductase Pathway in Haemophilus influenzae

2007 ◽  
Vol 51 (8) ◽  
pp. 2820-2829 ◽  
Author(s):  
Arnold L. Smith ◽  
Alice L. Erwin ◽  
Toni Kline ◽  
William C. T. Unrath ◽  
Kevin Nelson ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Antibacterial Activity ◽  
Protein Synthesis ◽  
Haemophilus Influenzae ◽  
Allylic Alcohol ◽  
Chloramphenicol Resistance ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Life Threatening

ABSTRACT The p-nitroaromatic antibiotic chloramphenicol has been used extensively to treat life-threatening infections due to Haemophilus influenzae and Neisseria meningitidis; its mechanism of action is the inhibition of protein synthesis. We found that during incubation with H. influenzae cells and lysates, chloramphenicol is converted to a 4-aminophenyl allylic alcohol that lacks antibacterial activity. The allylic alcohol moiety undergoes facile re-addition of water to restore the 1,3-diol, as well as further dehydration driven by the aromatic amine to form the iminoquinone. Several Neisseria species and most chloramphenicol-susceptible Haemophilus species, but not Escherichia coli or other gram-negative or gram-positive bacteria we examined, were also found to metabolize chloramphenicol. The products of chloramphenicol metabolism by species other than H. influenzae have not yet been characterized. The strains reducing the antibiotic were chloramphenicol susceptible, indicating that the pathway does not appear to mediate chloramphenicol resistance. The role of this novel nitroreductase pathway in the physiology of H. influenzae and Neisseria species is unknown. Further understanding of the H. influenzae chloramphenicol reduction pathway will contribute to our knowledge of the diversity of prokaryotic nitroreductase mechanisms.

Sign in / Sign up

Export Citation Format

Share Document