Production of Silver Ions from Colloidal Silver by Nanoparticle Iontophoresis System

2011 ◽  
Vol 11 (3) ◽  
pp. 1991-1995 ◽  
Author(s):  
Kuo-Hsiung Tseng ◽  
Chih-Yu Liao
Keyword(s):  
Silver Ions ◽  
Colloidal Silver

Antibacterial and Hemolytic Activity of Green Silver Nanoparticles from Catharanthus roseus

1970 ◽  
Vol 9 (1) ◽  
pp. 3112-3117 ◽  
Author(s):  
A. Raja ◽  
S. Mohamed Salique ◽  
P. Gajalakshmi ◽  
Arthur James
Keyword(s):  
Silver Nanoparticles ◽  
Cardiac Glycosides ◽  
Room Temperature ◽  
Silver Ions ◽  
Major Constituent ◽  
Colloidal Silver ◽  
Capping Agent ◽  
Phytochemical Study ◽  
One Step

The objective of this research was to standardize the Green synthesis of silver nanoparticles by C.roseus and to evaluate them for their potential against Mycobacteral tuberculosis. Phytochemical study realized the presence flavonoids, saponins, alkaloids, cardiac glycosides, steroids and tannins. Colloidal silver nanoparicle was synthesized by one step green reduction at room temperature and characterized by UV and TEM. An effort made to find out the capping agent revealed that the TLC fraction with 0.7 Rf value showed the reduction of silver ions. GCMS analysis of TLC fraction showed the presence of nine different phytochemical which includes pentadecane and piperdine carboxylic acid as major constituent. The nanoparticle diameter is in the range of 38- 52 nm and stable for 30 days under room temperature. The bactericidal activity of synthesized nanoparticle was  24 ± 0.04 and 22 ± 0.62 mm respectively against M.smegmatis and M.tuberculosis. The in vitro hemolytic assessment of silver nanoparticles was found to be safe at maximum of 1-5 µg/mL and toxic between 15- 50 µg/ml. Further this data encourages that theses biologically synthesized nanoparticles were found to be less toxic and more effective against mycobacterial strains.

Stabilization of colloidal silver produced by pyrene-sensitized photoreduction of silver ions in methanol

1981 ◽  
Vol 85 (14) ◽  
pp. 1963-1966 ◽  
Author(s):  
Tze-Chi Jao ◽  
Godfrey S. Beddard ◽  
Pietro Tundo ◽  
Janos H. Fendler
Keyword(s):  
Silver Ions ◽  
Colloidal Silver

Effect of Food Constituents on Genotoxicity Induced by Silver Ions, Colloidal Silver and Silver Nanoparticles

2015 ◽  
Vol 87 ◽  
pp. S83
Author(s):  
Karlis Briviba ◽  
Volker Gräf ◽  
Elke Walz ◽  
Diana Behsnilian ◽  
Ralf Greiner
Keyword(s):  
Silver Nanoparticles ◽  
Silver Ions ◽  
Colloidal Silver ◽  
Effect Of Food

scholarly journals Adjunctive effect of the colloidal silver ions solution in the treatment of chronic periodontal disease: A preliminary clinical study

2018 ◽  
Vol 75 (12) ◽  
pp. 1216-1221
Author(s):  
Vladan Kovacevic ◽  
Dragana Dakovic ◽  
Dubravko Bokonjic
Keyword(s):  
Periodontal Disease ◽  
Chronic Periodontitis ◽  
Silver Ions ◽  
Treated Group ◽  
Colloidal Silver ◽  
Clinical Attachment Loss ◽  
Mean Values ◽  
Chronic Periodontal Disease ◽  
Long Time ◽  
Root Planning

Background/Aim. Bacteria play the most important role in the development of periodontitis and chlorhexidine (CHX) is a ?gold standard? in its treatment. Silver ions are also strong antiseptics, being used in dentistry for a long time. Therefore, the aim of this study was to compare the efficacy of CHX and colloidal silver ions solution (SSI) in the treatment of patients with chronic periodontitis. The additional aim was to ascertain silver ions, tolerability and efficacy comparing to CHX. Methods. Twenty-nine examinees of both sexes (the average age 50.6) participated in this study and were divided into two groups. The patients in the first group (n = 15) suffering from a generalized moderate chronic periodontitis, after scaling and root planning (SRP), were treated by rinsing of periodontal pockets with 0.2% solution of CHX. The patients of the second group (n = 14), in addition to the treatment of periodontal pockets, were treated with a 5 mg/mL colloidal SSI. Results. During the periodontal treatment, the mean values of all clinical parameters (except clinical attachment loss ? CAL), in the both groups of patients were statistically significantly lower (p < 0.001) in relation to the initial values. The greater reduction of periodontal bleeching on probing (BOP) depth after one month was found in the SSI treated group (0.97 mm) in relation to the CHX group (0.65 mm). The local application of CHX and SSI led to statistically significant reduction of gingival parameters (gingival index ? GI and BOP) in the groups after the treatment (GI for 0.65 and 0.87; BOP for 0.31 and 0.33, respectively). Conclusion. The results of our study showed that colloidal SSI was at least equally effective in the treatment of patients with periodontal disease as the solution of CHX. Additionally, the SSI is simple for use which speaks in favor of its more extensive use in dentistry including chronic periodontal disease.

scholarly journals Formation And Stabilization Of Silver Nanoparticles In Ethanol By Phosphinic Acid

2015 ◽  
Vol 60 (2) ◽  
pp. 1293-1296
Author(s):  
J.-K. Kim ◽  
H.M. Shim ◽  
M.-J. Park ◽  
K.-K. Koo
Keyword(s):  
Activation Energy ◽  
Silver Nanoparticles ◽  
Reduction Potential ◽  
Reaction Order ◽  
Phosphinic Acid ◽  
Silver Ions ◽  
Colloidal Silver ◽  
Acid Salt ◽  
Life Analysis ◽  
Cubic Structure

Abstract Although phosphinic acid (H3PO2) has a powerful reduction potential, the reduction of silver ions by phosphinic acid salt has not yet been reported. In this work, colloidal silver has successfully synthesized by reducing silver ions in ethanol with phosphinic acid as a reducing agent. The effects of [AgNO3]/[H3PO2] ratios and reaction temperature were considered. Spherical silver nanoparticles with cubic structure were successfully prepared and their diameters were measured to be 8.5±0.9 nm − 11.3±0.2 nm. Half-life analysis showed that the reduction of silver ions proceeded with the reaction order of 1.30 on concentration of phosphinic acid and activation energy of 120.7 kJ/mol.

Biocompatibility of Silver Nano Bio-conjugates from Vitis vinifera Seeds and its Major Component Resveratrol

2016 ◽  
Vol 6 (3) ◽  
Author(s):  
R. Preethi ◽  
P. Padma
Keyword(s):  
Zeta Potential ◽  
Vitis Vinifera ◽  
Silver Ions ◽  
Seed Extract ◽  
Polydispersity Index ◽  
Potential Range ◽  
Visible Spectroscopy ◽  
Grape Seeds ◽  
X Ray ◽  
Uv Visible

The study focused on the green synthesis of silver nanobioconjugates (AgNPs) from phenolic-rich fruit source, Vitis vinifera seed extract and its major component phenolic, resveratrol respectively. Sunlight exposure for 20 minutes was the method of choice for the synthesis of AgNPs of the extract as well as the phenolic, resveratrol. The synthesized nanobioconjugates were characterized using UV-Visible spectroscopy, Transmission electron microscopy (TEM), Energy dispersive X-ray analysis (EDAX), X-ray diffraction (XRD), Polydispersity index, Zeta potential and Fourier transform infrared spectroscopy (FTIR). The reduction of silver ions was confirmed by UV-visible spectroscopy with peaks at 440nm for both nanobioconjugates synthesized from seed extract and compound. The nanobioconjugates showed the spherical in shape with 14-35nm in size and crystalline in nature. The conjugates are well dispersed with 0.301 and 0.287 polydispersity index and the zeta potential range at -13.6 and -14.3mV for stability. The FTRI data proved that the components in grape seeds act as good reductants and stabilizers for the silver nanobioconjugate synthesis. All the synthesized nanobioconjugates exhibited steady and sustained release of the medicinal components conjugated, proving their druggability, and were biocompatible with human cells, demonstrating their safety. The findings of the study validate the anticancer properties of silver nanobioconjugates of Vitis vinifera and its active component resveratrol.

Antimicrobial Activity of Silver Nanoparticles Synthesized by Streptomyces Species JF714876

2012 ◽  
Vol 5 (1) ◽  
pp. 1638-1642 ◽  
Author(s):  
Vidyasagar G M ◽  
Shankaravva B ◽  
R Begum ◽  
Imrose ◽  
Sagar R ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Silver Ions ◽  
Human Beings ◽  
Streptomyces Species ◽  
Force Microscopy ◽  
E Coli ◽  
Extracellular Synthesis ◽  
Atomic Force ◽  
Uv Visible

Microorganisms like fungi, actinomycetes and bacteria are considered nanofactories and are helpful in the production of nanoparticles useful in the welfare of human beings. In the present study, we investigated the production of silver nanoparticles from Streptomyces species JF714876. Extracellular synthesis of silver nanoparticles by Streptomyces species was carried out using two different media. Silver nanoparticles were examined using UV-visible, IR and atomic force microscopy. The size of silver nanoparticles was in the range of 80-100 nm. Antimicrobial activity of silver nanoparticle against bacteria such as E. coli, S. aureus, and dermatophytes like T. rubrum and T. tonsurans was determined. Thus, this study suggests that the Streptomyces sp. JF741876 can produce silver ions that can be used as an antimicrobial substance.

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