Effect of carbenicillin on ethylene inhibition and antibacterial properties of silver nitrate

2015 ◽  
Vol 51 (1) ◽  
pp. 62-70 ◽  
Author(s):  
Rebecca E. Rode ◽  
Tracy M. Rode ◽  
David R. Duncan
Keyword(s):  
Silver Nitrate ◽  
Antibacterial Properties

scholarly journals Facile Route to Effective Antimicrobial Aluminum Oxide Layer Realized by Co-Deposition with Silver Nitrate

Coatings ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 28
Author(s):  
Massimo Calovi ◽  
Berenice Furlan ◽  
Valentina Coroneo ◽  
Orietta Massidda ◽  
Stefano Rossi
Keyword(s):  
Aluminum Oxide ◽  
Silver Nitrate ◽  
Salt Spray ◽  
Antibacterial Properties ◽  
Protective Behavior ◽  
Anodized Aluminum ◽  
Simple Method ◽  
Antimicrobial Surfaces ◽  
Aluminum Oxide Layer ◽  
Escherichia Coli Bacteria

The emergence and spreading of the SARS-CoV-2 pandemic has forced the focus of attention on a significant issue: the realization of antimicrobial surfaces for public spaces, which do not require extensive use of disinfectants. Silver represents one of the most used elements in this context, thanks to its excellent biocidal performance. This work describes a simple method for the realization of anodized aluminum layers, whose antimicrobial features are ensured by the co-deposition with silver nitrate. The durability and the chemical resistance of the samples were evaluated by means of several accelerated degradation tests, such as the exposure in a salt spray chamber, the contact with synthetic sweat and the scrub test, highlighting the residual influence of silver in altering the protective behavior of the alumina layers. Furthermore, the ISO 22196:2011 standard was used as the reference protocol to set up an assay to measure the effective antibacterial activity of the alumina-Ag layers against both Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria, even at low concentrations of silver. Finally, the Ag-containing aluminum oxide layers exhibited excellent antimicrobial performances also following the chemical–physical degradation processes, ensuring good durability over time of the antimicrobial surfaces. Overall, this work introduces a simple route for the realization of anodized aluminum surfaces with excellent antibacterial properties.

Preparation of different sized nano-silver loaded on functionalized graphene oxide with highly effective antibacterial properties

2015 ◽  
Vol 3 (35) ◽  
pp. 7020-7029 ◽  
Author(s):  
Xu Chen ◽  
Xiaoquan Huang ◽  
Chuping Zheng ◽  
Yanan Liu ◽  
Taoyuan Xu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Silver Nitrate ◽  
Antibacterial Properties ◽  
Single Layer ◽  
Amine Group ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Nano Silver ◽  
Amidation Reaction ◽  
Carboxylic Groups

The synthesis of GO@PEG@AgNPs composites: step 1, synthesis of single-layer GO, step 2, the amidation reaction between carboxylic groups of GO and amine group of PEG to synthesize GO@PEG, step 3, GO@PEG in the presence the silver nitrate produces a GO@PEG@AgNPs composites.

Nanocomposite polyacrylonitrile filaments with electrostatic dissipative and antibacterial properties

2016 ◽  
Vol 50 (30) ◽  
pp. 4279-4289 ◽  
Author(s):  
Nuray Kizildag ◽  
Nuray Ucar
Keyword(s):  
Antibacterial Activity ◽  
Silver Nitrate ◽  
Chemical Reduction ◽  
Antibacterial Properties ◽  
Reduction Process ◽  
Nitrate Content ◽  
Visible Spectroscopy ◽  
Ion Release ◽  
Filament Structure ◽  
Silver Release

In this study, silver nitrate was added to polyacrylonitrile filament structure and chemical reduction was applied to composite filaments in order to develop multifunctional polyacrylonitrile filaments with electrostatic dissipative and antibacterial properties. Composite filaments of polyacrylonitrile and silver nitrate were characterized and evaluated in terms of morphology, chemical structure, tensile properties, crystallinity, conductivity, thermal properties, silver ion release behaviour and antibacterial activity. Additionally, ultraviolet-visible spectroscopy was used to confirm the formation of nanoparticles and the variation in the concentration of the nanoparticles with the application of the chemical reduction process. Scanning electron microscope images and ultraviolet-visible spectroscopy results confirmed the formation of nanoparticles in the filament structure. Breaking strength and breaking elongation increased at silver nitrate content of 1%. Composite filaments displayed improved thermal stability and their conductivities were in the semiconductive range. Atomic absorption spectroscopy confirmed that necessary amounts of silver release for antibacterial activity occurred, while the antibacterial activity analysis showed that the composite filaments have excellent antibacterial activity. The results obtained were promising and showed that the composite filaments could be used in electrostatic dissipative and antibacterial applications.

Fabrication of hydroxyapatite microparticles including silver nano-dots at grain boundary for long-term antimicrobial property

MRS Advances ◽  
2016 ◽  
Vol 2 (24) ◽  
pp. 1285-1290
Author(s):  
Hiroaki Igashira ◽  
Michimasa Kamo ◽  
Masayuki Kyomoto ◽  
Toshiyuki Ikoma
Keyword(s):  
Grain Boundary ◽  
Silver Nitrate ◽  
Silver Oxide ◽  
Antimicrobial Property ◽  
Nitrate Solution ◽  
Antibacterial Properties ◽  
Silver Ions ◽  
Silver Nitrate Solution ◽  
Silver Phosphate

ABSTRACTThe antibacterial properties are useful to restrain inflammatory response caused by bacterial infection after implantation. The composites of hydroxyapatite (HAp) and silver nano-dots, silver oxide or silver phosphate have been investigated; however there are still some disadvantage in sintering; 1) silver nano-dots grow large, and are not homogenously distributed, 2) silver nano-dots melt and remove, and 3) silver phosphate and silver oxide formed exhibit higher solubility than metal silver. In this study, the distribution of silver nano-dots in HAp microparticles sintered was controlled at grain boundary with a modified silver mirror reaction as a novel route. HAp microparticles adsorbed formaldehyde by a vapor deposition method were soaked in an ammoniacal silver nitrate solution and were then sintered. There was a single phase of HAp including metal silver at 6.4 wt% even after sintering. The silver nano-dots were homogeneously distributed inside the microparticles. The release profiles of silver ions in phosphate buffer saline were compared with a reference; the HAp microparticles were soaked into silver nitrate solution and were then sintered. The distribution of silver in the reference was not homogeneous and large silver microparticles were grown outside the particles at 6.3wt%. The elution amount of silver ions from the microparticles at 12 hours was one-eighteenth of that from the reference. These results suggest that the HAp microparticles including silver nano-dots at grain boundary will be suitable for a long-term antibacterial material.

scholarly journals Antibacterial Properties of Silicone Membranes after a Simple Two-Step Immersion Process in Iodine and Silver Nitrate Solutions

2018 ◽  
Vol 23 (3) ◽  
pp. 97-105 ◽  
Author(s):  
SHIHO AOKI ◽  
KOHEI YAMAKAWA ◽  
KENJI KUBO ◽  
JUNPEI TAKESHITA ◽  
MIKI TAKEUCHI ◽  
...  
Keyword(s):  
Silver Nitrate ◽  
Antibacterial Properties ◽  
Silicone Membranes ◽  
Silver Nitrate Solutions ◽  
Nitrate Solutions

scholarly journals In Situ Synthesis of a Silver-Containing Superabsorbent Polymer via a Greener Method Based on Carboxymethyl Celluloses

Molecules ◽  
2018 ◽  
Vol 23 (10) ◽  
pp. 2483 ◽  
Author(s):  
Jie Shen ◽  
Chang Cui ◽  
Jian Li ◽  
Lijuan Wang
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Acrylic Acid ◽  
Silver Nitrate ◽  
Photoelectron Spectroscopy ◽  
Three Dimensional ◽  
Antibacterial Properties ◽  
Superabsorbent Polymer ◽  
Swelling Ratio ◽  
Silver Particles

An antibacterial superabsorbent polymer (SAP) was synthesized by grafting acrylic acid (AA) onto carboxymethyl cellulose (CMC) and mixing with silver particles, with N,N′-methylenebisacrylamide used as a crosslinker and potassium persulfate as an initiator. Silver nanoparticles were produced through the reaction between glucose and silver nitrate. The effects of the amount of silver nitrate added in the polymer on the swelling ratio were investigated and the maximum swelling ratio of the SAP loaded with silver particles in distilled water and in a 0.9 wt % NaCl solution reached 840 g/g and 71 g/g, respectively, when the silver nitrate added was 50 mg. The SAP was characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, ultraviolet-visible spectroscopy, scanning electron microscopy, energy dispersive spectrometry, transmission electron microscopy, and thermogravimetric analysis. Through these analysis methods, it could be seen that the acrylic acid was successfully grafted onto CMC, forming a three-dimensional network structure, with the successful production of silver nanoparticles with sizes ranging from 5 nm to 50 nm. Moreover, the antibacterial properties of the SAP loaded with silver nanoparticles against Staphylococcus aureus and Escherichia coli were investigated and the results show that they became more effective with increasing silver nitrate concentration. The obtained SAP can be useful in developing new antibacterial medical and public health supplies.

scholarly journals The use of PWHM and Mie methods in estimation of colloidal silver particle size obtained by chemical precipitation with sodium borohydride

2019 ◽  
Vol 73 (6) ◽  
pp. 397-404 ◽  
Author(s):  
Damir Barbir ◽  
Pero Dabic ◽  
Mario Mehes
Keyword(s):  
Silver Nitrate ◽  
Sodium Borohydride ◽  
Conventional Medicine ◽  
Influence Factors ◽  
Antibacterial Properties ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Colloidal Silver ◽  
Light Yellow ◽  
20 Nm

Unique antibacterial properties of silver have been known since the time of Egyptian pharaohs. With the discovery of antibiotics at the beginning of the twentieth century, silver is mostly pushed out from conventional medicine. However, with the excessive use of antibiotics, antibiotic-resistant super bacteria have appeared. Therefore, there is an increased interest in studying the antibacterial effects of colloidal silver. In this paper, the influence of various concentrations of silver nitrate on formation of colloidal silver particles in the solution was investigated. Colloidal silver was prepared by a chemical precipitation method using sodium borohydride as a reducing agent. As influence factors, color of the solution, Tyndall effect, UV/Vis absorption, and nanoparticle size estimated by PWHM (Peak Width at Half Maximum) and Mie methods were used. By increasing the silver concentration, color of the solution ranged from light yellow to dark yellow. All solutions showed Tyndall's effect equally. By the UV/Vis analysis it was found that the solutions absorbed radiation in the wavelength range 390-402 nm, and the intensity increased with increasing silver nitrate concentrations. By the PWHM and Mie methods silver nanoparticle sizes were estimated in the range 12-20 nm.

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