Characterization And Biological Activity Of Green Synthesis Silver Nanoparticles

2019 ◽  
Vol 9 (o3) ◽  
Author(s):  
Neeran Obied Jasim ◽  
Benin Nabel ◽  
Anwer Taleb
Keyword(s):  
Silver Nanoparticles ◽  
Biological Activity ◽  
Antifungal Activity ◽  
Green Synthesis ◽  
Silver Nitrate ◽  
Ag Nanoparticles ◽  
Color Change ◽  
Streptomyces Sp ◽  
Microscope Images

This study has been carried out to synthesis of silver nanoparticles using green synthesis by using Streptomyces sp. .that isolating from soil and Investigation the antifungal activity of it. Results shown ,that silver nanoparticles were synthesized using Streptomyces sp in present of silver nitrate and the color change to brown .UV-Vis spectrophotometer appear peak in wavelength at 420 nm which is prescribed for silver nanoparticles .Also, microscope images by SEM ,showing the size of Ag nanoparticles in range 15-50 nm. Results of antifungal activity explain the ability of biosynthesis silver nanoparticles to inhibition the growth of fungus T.rubrum.

scholarly journals Silver nanoparticles: Green Synthesis and Their Antibacterial efficiency

2021 ◽  
Vol 59 (2) ◽  
pp. 214
Author(s):  
Dung Ngo Thanh ◽  
Nguyet Ha Minh ◽  
Tam Le Thi Thanh ◽  
Lu Le Trong
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Green Synthesis ◽  
Silver Nitrate ◽  
Tannic Acid ◽  
Ag Nanoparticles ◽  
Sodium Citrate ◽  
Reducing Agents ◽  
Ag Nps ◽  
Silver Nps

In this study, silver nanoparticles were synthesized from aqueous silver nitrate through a simple and eco-friendly route using a combination of two reducing agents: sodium citrate and tannic acid. By this method, the obtained Ag nanoparticles (NPs) were stable within the studied period of six months. Besides, both TEM images and UV-Vis results showed that the size of silver NPs could be controlled by changing the concentration of tannic acid. The antibacterial ability of Ag NPs with different sizes were also examined. In detail, the smaller the Ag NPs were, the more efficient their antibacterial activity was.

Controlling the Surface Plasmon Absorption of Silver Nanoparticles via Green Synthesis Using Pennisetum purpureum Leaf Extract

2018 ◽  
Vol 772 ◽  
pp. 73-77
Author(s):  
Ruelson S. Solidum ◽  
Arnold C. Alguno ◽  
Rey Capangpangan
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Silver Nitrate ◽  
Surface Plasmon ◽  
Leaf Extract ◽  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
Absorption Peak ◽  
Plasmon Absorption ◽  
Surface Plasmon Absorption

We report on the green synthesis of silver nanoparticles utilizing theP.purpureumleaf extract. Controlling the surface plasmon absorption of silver nanoparticles was achieved by regulating the amount of extract concentration and the molarity of silver nitrate solution. The surface plasmon absorption peak is found at around 430nm. The surface plasmon absorption peak have shifted to lower wavelength as the amount of extract is increased, while plasmon absorption peak shifts on a higher wavelength as the concentration of silver nitrate is increased before it stabilized at 430nm. This can be explained in terms of the available nucleation sites promoted by the plant extract as well as the available silver ions present in silver nitrate solution.

Val-Geninthiocin: Structure Elucidation and MSn Fragmentation of Thiopeptide Antibiotics Produced by Streptomyces sp. RSF18

2008 ◽  
Vol 63 (10) ◽  
pp. 1223-1230 ◽  
Author(s):  
Imran Sajid ◽  
Khaled A. Shaaban ◽  
Holm Frauendorf ◽  
Shahida Hasnain ◽  
Hartmut Laatscha
Keyword(s):  
Amino Acids ◽  
Biological Activity ◽  
Antifungal Activity ◽  
Structure Elucidation ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Unusual Amino Acids ◽  
Streptomyces Sp ◽  
Gram Positive Bacteria ◽  
Thiopeptide Antibiotics

AbstractVal-Geninthiocin (2), a new member of thiopeptide antibiotics, was isolated from the mycelium of Streptomyces sp. RSF18, along with the closely related geninthiocin (1) and the macrolide, chalcomycin. By intensive NMR and MS studies, Val-geninthiocin (2) was identified as desoxygeninthiocin, a thiopeptide, containing several oxazole and thiazole units and a number of unusual amino acids. Compound 2 shows potent activity against Gram-positive bacteria and minor antifungal activity, while it is not effective against Gram-negative bacteria or microalgae. Here we describe the fermentation, isolation and structure elucidation as well as the biological activity of 2.

One step green synthesis of hexagonal silver nanoparticles and their biological activity

2014 ◽  
Vol 20 (6) ◽  
pp. 4473-4481 ◽  
Author(s):  
Samy M. Shaban ◽  
Ismail Aiad ◽  
Mohamed M. El-Sukkary ◽  
E.A. Soliman ◽  
Moshira Y. El-Awady
Keyword(s):  
Silver Nanoparticles ◽  
Biological Activity ◽  
Green Synthesis ◽  
One Step

Green Synthesis of Semi-IPN Hydrogel-Silver Nanocomposites by a Biotemplate Redox Technique at Room Temperature

2012 ◽  
Vol 468-471 ◽  
pp. 1974-1977
Author(s):  
Wen Wu ◽  
Dong Sheng Wang
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Silver Nitrate ◽  
Room Temperature ◽  
In Situ Reduction ◽  
X Ray Diffraction ◽  
Silk Sericin ◽  
X Ray ◽  
Silver Nanocomposites

Semi-IPN hydrogels in which silk sericin (SS) chains were physically dispersed throughout dextran (Dex) gel networks were synthesized. Highly stable distributed silver nanoparticles have been prepared using these semi-IPN hydrogels as a carrier via in situ reduction of silver nitrate without the addition of any reducing agent. The resultant semi-IPN hydrogel-silver nanocomposites were characterized by X-ray diffraction (XRD). And the swelling behavior of the hydrogles was also studied.

In situ and green synthesis of silver nanoparticles and their biological activity

2014 ◽  
Vol 20 (5) ◽  
pp. 3430-3439 ◽  
Author(s):  
Ismail Aiad ◽  
Mohamed M. El-Sukkary ◽  
E.A. Soliman ◽  
Moshira Y. El-Awady ◽  
Samy M. Shaban
Keyword(s):  
Silver Nanoparticles ◽  
Biological Activity ◽  
Green Synthesis
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