Effects of Chloride Ions on Dissolution, ROS Generation, and Toxicity of Silver Nanoparticles under UV Irradiation

2017 ◽  
Vol 52 (8) ◽  
pp. 4842-4849 ◽  
Author(s):  
Yang Li ◽  
Jian Zhao ◽  
Enxiang Shang ◽  
Xinghui Xia ◽  
Junfeng Niu ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Uv Irradiation ◽  
Chloride Ions ◽  
Ros Generation

scholarly journals Green Synthesis and Characterization of Pullulan Mediated Silver Nanoparticles through Ultraviolet Irradiation

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2382 ◽  
Author(s):  
Muhammad Jamshed Khan ◽  
Suriya Kumari ◽  
Kamyar Shameli ◽  
Jinap Selamat ◽  
Awis Qurni Sazili
Keyword(s):  
Silver Nanoparticles ◽  
Uv Irradiation ◽  
Irradiation Time ◽  
Edible Films ◽  
Crystallographic Structure ◽  
Face Centered Cubic ◽  
Selected Area Electron Diffraction ◽  
Vis Spectroscopy ◽  
Face Centered ◽  
Average Lattice

Nanoparticles (NPs) are, frequently, being utilized in multi-dimensional enterprises. Silver nanoparticles (AgNPs) have attracted researchers in the last decade due to their exceptional efficacy at very low volume and stability at higher temperatures. Due to certain limitations of the chemical method of synthesis, AgNPs can be obtained by physical methods including sun rays, microwaves and ultraviolet (UV) radiation. In the current study, the synthesis of pullulan mediated silver nanoparticles (P-AgNPs) was achieved through ultraviolet (UV) irradiation, with a wavelength of 365 nm, for 96 h. P-AgNPs were formed after 24 h of UV-irradiation time and expressed spectra maxima as 415 nm, after 96 h, in UV-vis spectroscopy. The crystallographic structure was “face centered cubic (fcc)” as confirmed by powder X-ray diffraction (PXRD). Furthermore, high resolution transmission electron microscopy (HRTEM) proved that P-AgNPs were covered with a thin layer of pullulan, with a mean crystalline size of 6.02 ± 2.37. The average lattice fringe spacing of nanoparticles was confirmed as 0.235 nm with quasi-spherical characteristics, by selected area electron diffraction (SAED) analysis. These green synthesized P-AgNPs can be utilized efficiently, as an active food and meat preservative, when incorporated into the edible films.

Modulation of bactericidal action in polymer nanocomposites: light-tuned Ag+ release from electrospun PMMA fibers

RSC Advances ◽  
2016 ◽  
Vol 6 (81) ◽  
pp. 78036-78042 ◽  
Author(s):  
I. Moreno ◽  
N. Navascues ◽  
S. Irusta ◽  
J. Santamaria
Keyword(s):  
Silver Nanoparticles ◽  
Polymer Nanocomposites ◽  
Uv Irradiation ◽  
Silver Ions ◽  
Bactericidal Action

Silver rate release from electrospun PMMA fibers tuned by combination of silver ions and silver nanoparticles produced by UV irradiation.

scholarly journals Correction to “Effect of Silver Nanoparticles on the Photophysics of Riboflavin: Consequences on the ROS Generation”

2016 ◽  
Vol 120 (44) ◽  
pp. 25638-25638
Author(s):  
María Belén Rivas Aiello ◽  
Juan José Romero ◽  
Sonia G. Bertolotti ◽  
Mónica C. Gonzalez ◽  
Daniel O. Mártire
Keyword(s):  
Silver Nanoparticles ◽  
Ros Generation

scholarly journals Silver Nanoparticles Synthesized with Rumex hymenosepalus: A Strategy to Combat Early Mortality Syndrome (EMS) in a Cultivated White Shrimp

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Francisco Javier Alvarez-Cirerol ◽  
Marco Antonio López-Torres ◽  
Ericka Rodríguez-León ◽  
César Rodríguez-Beas ◽  
Aaron Martínez-Higuera ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Antibacterial Properties ◽  
Early Mortality ◽  
White Shrimp ◽  
Ros Generation ◽  
Early Mortality Syndrome ◽  
Selected Area Electron Diffraction ◽  
Worldwide Production ◽  
Vis Spectroscopy

Early Mortality Syndrome (EMS) or Acute Hepatopancreatic Necrosis Syndrome (AHPNS) is a disease produced by gram-negative bacteria Vibrio parahaemolyticus (V. parahaemolyticus), which has caused declines in worldwide production of a white shrimp Litopenaeus vannamei (L. vannamei). In this work, we propose the implementation of silver nanoparticles (AgNPs) synthesized with Rumex hymenosepalus (Rh) extract as an alternative on V. parahaemolyticus control. AgNPs were characterized by UV-Vis spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED). AgNP mean sizes by DLS were 80.82±1.16 nm and sizes between 2 and 10 nm by TEM, with a zeta potential of −47.72±1.05 mV. This study evaluated AgNPs and Rh antimicrobial capacity on V. parahaemolyticus at different concentrations; the minimum inhibitory concentration (MIC) found was 25 μg/mL for AgNPs and 220 μg/mL for Rh. Additionally, were carried out time-kill curves and reactive oxygen species (ROS) generation for 1 and 4 MIC. Both concentrations (MIC) were tested for toxicity on Artemia nauplii from Artemia franciscana (A. franciscana), because nauplii were used as biocarriers for AgNPs and Rh extract on L. vannamei. Once the shrimp were treated, they were challenged with Vibrio infection and it was found that those who were treated with both agents showed greater survival than the control. V. parahaemolyticus and postlarval samples were taken from the bioassay and fixed and prepared for TEM and SEM in order to search NPs in internal structure of bacteria and the hepatopancreatic area of shrimps; AgNPs were detected in both cases. AgNPs and Rh extract show antibacterial properties on the infected shrimp with V. parahaemolyticus. The action mechanisms are interaction with the bacterial membrane and ROS generation; these effects are produced by both agents.

scholarly journals Effect of Silver Nanoparticles on the Photophysics of Riboflavin: Consequences on the ROS Generation

2016 ◽  
Vol 120 (38) ◽  
pp. 21967-21975 ◽  
Author(s):  
María Belén Rivas Aiello ◽  
Juan José Romero ◽  
Sonia G. Bertolotti ◽  
Mónica C. Gonzalez ◽  
Daniel O. Mártire
Keyword(s):  
Silver Nanoparticles ◽  
Ros Generation

UV Irradiation-induced Silver Nanoparticles as Mosquito Larvicides

2010 ◽  
Vol 10 (23) ◽  
pp. 3132-3136 ◽  
Author(s):  
N. Sap-Iam ◽  
C. Homklincha ◽  
R. Larpudomle ◽  
W. Warisnoich ◽  
A. Sereemaspu ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Uv Irradiation ◽  
Mosquito Larvicides
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