scholarly journals ELECTROMOTIVE FORCE OF SILVER NITRATE CONCENTRATION CELLS.

1913 ◽  
Vol 35 (6) ◽  
pp. 715-718 ◽  
Author(s):  
James M. Bell ◽  
Alexander L. Feild
Keyword(s):  
Silver Nitrate ◽  
Electromotive Force ◽  
Nitrate Concentration ◽  
Silver Nitrate Concentration ◽  
Concentration Cells

Thermoelectric Studies of Silver Nitrate in Sodium Nitrate – Potassium Nitrate Eutectic Melt

1971 ◽  
Vol 49 (12) ◽  
pp. 2044-2047
Author(s):  
L. G. Boxall ◽  
K. E. Johnson
Keyword(s):  
Seebeck Coefficient ◽  
Silver Nitrate ◽  
Mole Fraction ◽  
Sodium Nitrate ◽  
Nitrate Concentration ◽  
Potassium Nitrate ◽  
Silver Nitrate Concentration ◽  
Eutectic Melt

The Seebeck coefficient, εT, of the thermocell Ag(T)/AgNO3 in NaNO3 − KNO3/Ag (T + ΔT) was measured as a function of silver nitrate concentration and temperature. Extrapolation of the results to unit mole fraction, N, of AgNO3 gave the value εT0 = − 277.5 − 0.136T °C (µV deg−1).For several mixed melts of AgNO3 and an alkali nitrate the function [Formula: see text] was calculated and shown to be linear in N. P was extrapolated to finite values for the pure alkali nitrates.

scholarly journals Influence of Physico-Chemical Parameters on the Fabrication of Silver Nanoparticles Using Petrea volubilis L. Stem Broth and Its Anti-Microbial Efficacy

2017 ◽  
Vol 9 (2) ◽  
Author(s):  
N. I. Hulkoti ◽  
T. C. Taranath
Keyword(s):  
Silver Nanoparticles ◽  
Zeta Potential ◽  
Silver Nitrate ◽  
Microbial Activity ◽  
Contact Time ◽  
Nitrate Concentration ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Vis Spectroscopy ◽  
Silver Nitrate Concentration

In this study we describe the phytofabrication of AgNps through a green route as a cost-effective, instantaneous and an eco-friendly approach using Petrea volubilis L. stem broth. The influence of physico-chemical parameters - contact time, stem broth quantity, pH, temperature, and silver nitrate concentration were studied and optimised to engineer, nanoparticles of diverse sizes. Nanoparticles were characterized by UV-Vis spectroscopy, FTIR, XRD, Zeta potential, EDS, and HRTEM. The characterization using HRTEM showed that, the nanoparticles were spherical and with increase in contact time, stem broth quantity, pH, and temperature, the NPs size minimised whereas escalation in silver nitrate concentration, increased their size. Capping molecules were negatively charged and the NPs were passably stable according to zeta potential readings and they were crystalline as per XRD data. According to FTIR analysis, the bio reduction was attributed to alcohol, ethers, carboxylic acids, and esters. The highest anti-bacterial activity was observed against S. aureus and S. typhi whose ZOI diameter was 13 mm at 100?l in both bacteria. The highest anti-fungal activity of silver nanoparticles was observed against A. flavus whose ZOI diameter was 9 mm at 100?l compared to P. chrysogenum which is 3 mm at 100?l. The stem broth did not show any anti-microbial activity for the microbes. Anti-microbial activity of AgNPs is due to its small size and high surface area. Our findings clearly discloses that sizes of silver nanoparticles can be varied by varying the physico-chemical parameters and the small sized nanoparticles so formed are promising antimicrobial agents and has a great potential in various medical applications.

scholarly journals Antibacterial Activity of Silver Nanoparticles Capped by p-Aminobenzoic Acid on Escherichia coli and Staphylococcus aureus

2019 ◽  
Vol 20 (1) ◽  
pp. 182
Author(s):  
Dian Susanthy ◽  
Sri Juari Santosa ◽  
Eko Sri Kunarti
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Particle Size ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Silver Nitrate ◽  
Nitrate Concentration ◽  
Aminobenzoic Acid ◽  
Antibacterial Performance ◽  
Silver Nitrate Concentration

This paper describes the antibacterial performance of silver nanoparticles (AgNPs) which have been synthesized by using p-aminobenzoic acid as reducing and stabilizing agent simultaneously. The silver nitrate with various concentrations was reacted with pH 11-adjusted p-aminobenzoic acid with a concentration of 5 × 10–3 mol L–1 for 30 min in a boiling water bath. The synthesized AgNPs were characterized by UV-Vis spectrophotometry, Transmission Electron Microscope (TEM), and Particle Size Analyzer (PSA). The antibacterial performance of the synthesized AgNPs was evaluated by agar well diffusion method on Escherichia coli and Staphylococcus aureus. The higher silver nitrate concentration, the bigger the nanoparticle size, the wider particle size distribution, and the higher number of AgNPs formed. AgNPs synthesized from higher silver nitrate concentration had higher antibacterial activity. It is an indication that the antibacterial activity of AgNPs is mainly controlled by the silver ion concentration which influences the AgNPs particle size and existence of silver ion in the AgNPs colloidal solution

Preparation of Nanosilver Loaded Calcium Phosphate by In Situ Phase Conversion Process

2012 ◽  
Vol 506 ◽  
pp. 254-257
Author(s):  
Faungchat Thammarakcharoen ◽  
K. Wasoontararat ◽  
Jintamai Suwanprateeb
Keyword(s):  
Calcium Phosphate ◽  
Silver Nitrate ◽  
Calcium Sulfate ◽  
Nitrate Concentration ◽  
Flexural Modulus ◽  
Average Particle Size ◽  
Average Particle ◽  
Transmission Electron ◽  
Silver Nitrate Concentration ◽  
Microscopy Techniques

The preparation of nanosilver loaded calcium phosphate aiming to enhance the antimicrobial performance by converting calcium sulfate hemihydrate based materials to calcium phosphate in the presence of silver nitrate (ranging 0.001-0.1 M) using low temperature phosphorization technique at 80 °C for 24 hours was performed. Phase composition, mechanical properties and microstructure of the resulting structures were characterized by x-ray diffraction, three-point bending and transmission electron microscopy techniques. Hydroxyapatite and monetite were found to be the main phases in the converted samples with different amount of residual calcium sulfate depending on the initial silver nitrate concentration in the converting media. Spherical-shaped silver nanoparticles were observed to distribute within the cluster of calcium compound crystals having average particle size in the range of 3.1-11.6 nm. Flexural modulus and strength of converted samples were observed to decrease from 1991 to 860 MPa and from 4.1 to 1.9 MPa respectively with increasing silver nitrate concentration from 0.001 to 0.1 M.

Optimal Silver Nitrate Concentration to Inhibit α‐Amylase Activity During Pasting of Rice Flour

2020 ◽  
pp. 2000150
Author(s):  
Sayedur Rahman ◽  
Ali Khoddami ◽  
Les Copeland ◽  
Brian J. Atwell ◽  
Thomas H. Roberts
Keyword(s):  
Silver Nitrate ◽  
Amylase Activity ◽  
Nitrate Concentration ◽  
Rice Flour ◽  
Silver Nitrate Concentration

scholarly journals Effect of culture media and silver nitrate concentration on nanoparticle biosynthesis by a filamentous fungus

2018 ◽  
Vol 3 (3) ◽  
pp. 1-14
Author(s):  
Diana G. Alamilla-Martínez ◽  
Norma G. Rojas-Avelizapa ◽  
Iván Domínguez-López ◽  
José Barceinas-Sánchez ◽  
Marlenne Gómez-Ramírez
Keyword(s):  
Silver Nitrate ◽  
Filamentous Fungus ◽  
Culture Media ◽  
Nitrate Concentration ◽  
Spherical Shape ◽  
Spent Catalyst ◽  
Tem Analysis ◽  
Visible Absorption ◽  
Software Analysis ◽  
Silver Nitrate Concentration

Recently the demand in the development of eco-friendly nanoparticles as alternative to chemical and physical methods has been increasing so the aim of this study was to evaluate the effect of silver nitrate concentration and extracellular filtrate (EF) produced by a filamentous fungus isolated from a spent catalyst and coded e identified as Penicillium purpurogenum CATMC-AH-1 on Silver nanoparticles (AgNPs) production. The filamentous fungus was growth in two culture media named Sucrose and Czapeck media to produce biomass and its was put in contact with water to get two different extracellular filtrates called EFS (extracellular filtrate sucrose) and EFC (extracellular filtrate Czapeck), the EF has the molecules involved to synthesis and stabilization of AgNPs. Three concentrations of AgNO3 1, 1.5 and 2 mM and both extracellular filtrates were used to produce AgNPs. The AgNPs produced were monitored by UV-visible absorption spectra from 200 to 800 nm while their morphology and size were identified by Transmission Electron Microscopy (TEM) and software analysis SPIP 2.6.0. Results showed that both extracellular filtrates had the ability to produce AgNPs with the three concentrations of AgNO3 used. TEM analysis showed AgNPs with spherical morphology in all systems. The AgNPs synthesized in EFS with the three AgNO3 concentrations showed average sizes of 8.9, 8.4 and 6.7 nm respectively. From EFC, the average sizes of AgNPs were of 14.9, 11.5 and 10.1 nm respectively. In summary, in EFS smallest sizes and diameter dispersion of AgNPs were obtained, comparing to EFC and the spherical shape was similar in both filtrates. The AgNO3 concentration had a positive effect when the EFC filtrate was used since a direct correlation was observed between the concentrations of silver nitrate and increase the absorption band around 420 nm as result of surface plasmon resonance of AgNPs produced. The AgNPs biosynthesized from both EF (EFS and EFC) could be used as antimicrobial agent by their small size. Parameter as silver nitrate concentrations and culture media are important because could be affect the size and concentrations of AgNPs biosynthesized.

Influence of silver nitrate concentration on the properties of silver nanoparticles

2011 ◽  
Vol 6 (8) ◽  
pp. 656 ◽  
Author(s):  
A. Sobczak-Kupiec ◽  
D. Malina ◽  
Z. Wzorek ◽  
M. Zimowska
Keyword(s):  
Silver Nanoparticles ◽  
Silver Nitrate ◽  
Nitrate Concentration ◽  
Silver Nitrate Concentration
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