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Silver nanoparticles obtained by aqueous or ethanolic aloe Vera extracts: An assessment of the antibacterial activity and mercury removal capability

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Date
2018
Author
Vélez E.
Campillo G.
Morales G.
Hincapié C.
Osorio J.
Arnache O.
TY - GEN T1 - Silver nanoparticles obtained by aqueous or ethanolic aloe Vera extracts: An assessment of the antibacterial activity and mercury removal capability AU - Vélez E. AU - Campillo G. AU - Morales G. AU - Hincapié C. AU - Osorio J. AU - Arnache O. Y1 - 2018 UR - http://hdl.handle.net/11407/4896 PB - Hindawi Limited AB - Silver nanoparticles (AgNPs) were synthesized by chemical reduction of Ag+ ions (from silver nitrate AgNO3), using aqueous or ethanolic Aloe vera extracts as reducing, stabilizing, and size control agent. The nanop articles' sizes were between 2 and 7nm for ethanolic extract and between 3 and 14nm for aqueous extract, as measured by High-Resolution Transmission Electron Microscope (HRTEM). The antibacterial activity against a mesophilic microorganism, Kocuria varians, a Gram-positive coccus, was measured by counting bacterial colonies in agar plate for both extracts. We found that 4% effective concentration is the lowest concentration that completely inhibited visible growth. Mercury removal was investigated by Atomic Absorption Spectroscopy (AAS) measurements, where it was shown that it is not necessary to use high concentrations of nano particles for effective removal of mercury inasmuch as with a 20% V/V concentration of both extracts; the Hg(II) removal percentage was above 95%. These results show that the mercury remaining un removed from the different essays is below the level allowed by World Health Organization (WHO) and the Environmental Protection Agency (EPA). © 2018 Ederley Vélez et al. ER - @misc{11407_4896, author = {Vélez E. and Campillo G. and Morales G. and Hincapié C. and Osorio J. and Arnache O.}, title = {Silver nanoparticles obtained by aqueous or ethanolic aloe Vera extracts: An assessment of the antibacterial activity and mercury removal capability}, year = {2018}, abstract = {Silver nanoparticles (AgNPs) were synthesized by chemical reduction of Ag+ ions (from silver nitrate AgNO3), using aqueous or ethanolic Aloe vera extracts as reducing, stabilizing, and size control agent. The nanop articles' sizes were between 2 and 7nm for ethanolic extract and between 3 and 14nm for aqueous extract, as measured by High-Resolution Transmission Electron Microscope (HRTEM). The antibacterial activity against a mesophilic microorganism, Kocuria varians, a Gram-positive coccus, was measured by counting bacterial colonies in agar plate for both extracts. We found that 4% effective concentration is the lowest concentration that completely inhibited visible growth. Mercury removal was investigated by Atomic Absorption Spectroscopy (AAS) measurements, where it was shown that it is not necessary to use high concentrations of nano particles for effective removal of mercury inasmuch as with a 20% V/V concentration of both extracts; the Hg(II) removal percentage was above 95%. These results show that the mercury remaining un removed from the different essays is below the level allowed by World Health Organization (WHO) and the Environmental Protection Agency (EPA). © 2018 Ederley Vélez et al.}, url = {http://hdl.handle.net/11407/4896} }RT Generic T1 Silver nanoparticles obtained by aqueous or ethanolic aloe Vera extracts: An assessment of the antibacterial activity and mercury removal capability A1 Vélez E. A1 Campillo G. A1 Morales G. A1 Hincapié C. A1 Osorio J. A1 Arnache O. YR 2018 LK http://hdl.handle.net/11407/4896 PB Hindawi Limited AB Silver nanoparticles (AgNPs) were synthesized by chemical reduction of Ag+ ions (from silver nitrate AgNO3), using aqueous or ethanolic Aloe vera extracts as reducing, stabilizing, and size control agent. The nanop articles' sizes were between 2 and 7nm for ethanolic extract and between 3 and 14nm for aqueous extract, as measured by High-Resolution Transmission Electron Microscope (HRTEM). The antibacterial activity against a mesophilic microorganism, Kocuria varians, a Gram-positive coccus, was measured by counting bacterial colonies in agar plate for both extracts. We found that 4% effective concentration is the lowest concentration that completely inhibited visible growth. Mercury removal was investigated by Atomic Absorption Spectroscopy (AAS) measurements, where it was shown that it is not necessary to use high concentrations of nano particles for effective removal of mercury inasmuch as with a 20% V/V concentration of both extracts; the Hg(II) removal percentage was above 95%. These results show that the mercury remaining un removed from the different essays is below the level allowed by World Health Organization (WHO) and the Environmental Protection Agency (EPA). © 2018 Ederley Vélez et al. OL Spanish (121)
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Abstract
Silver nanoparticles (AgNPs) were synthesized by chemical reduction of Ag+ ions (from silver nitrate AgNO3), using aqueous or ethanolic Aloe vera extracts as reducing, stabilizing, and size control agent. The nanop articles' sizes were between 2 and 7nm for ethanolic extract and between 3 and 14nm for aqueous extract, as measured by High-Resolution Transmission Electron Microscope (HRTEM). The antibacterial activity against a mesophilic microorganism, Kocuria varians, a Gram-positive coccus, was measured by counting bacterial colonies in agar plate for both extracts. We found that 4% effective concentration is the lowest concentration that completely inhibited visible growth. Mercury removal was investigated by Atomic Absorption Spectroscopy (AAS) measurements, where it was shown that it is not necessary to use high concentrations of nano particles for effective removal of mercury inasmuch as with a 20% V/V concentration of both extracts; the Hg(II) removal percentage was above 95%. These results show that the mercury remaining un removed from the different essays is below the level allowed by World Health Organization (WHO) and the Environmental Protection Agency (EPA). © 2018 Ederley Vélez et al.
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http://hdl.handle.net/11407/4896
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