scholarly journals Synergistic Eeffect of Polyene Antifungals and Silver Nanoparticles Against Candida Parapsilosis

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
da Frota SM ◽  
Cunha FA ◽  
Cunha MDCDSO ◽  
Martins RT ◽  
Menezes EA ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Candida Parapsilosis

scholarly journals Antifungal and Cytotoxic Evaluation of Photochemically Synthesized Heparin-Coated Gold and Silver Nanoparticles

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2849
Author(s):  
María del Pilar Rodriguez-Torres ◽  
Luis Armando Díaz-Torres ◽  
Blanca E. Millán-Chiu ◽  
René García-Contreras ◽  
Genoveva Hernández-Padrón ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Candida Parapsilosis ◽  
Uv Light ◽  
Chloroauric Acid ◽  
Gold And Silver Nanoparticles ◽  
Issatchenkia Orientalis ◽  
Microdilution Method ◽  
Metal Precursors ◽  
Photochemical Method ◽  
Vis Spectroscopy

Heparin-based silver nanoparticles (AgHep-NPs) and gold nanoparticles (AuHep-NPs) were produced by a photochemical method using silver nitrate and chloroauric acid as metal precursors and UV light at 254 nm. UV–Vis spectroscopy graphs showed absorption for AgHep-NPs and AuHep-NPs at 420 nm and 530 nm, respectively. TEM revealed a pseudospherical morphology and a small size, corresponding to 10–25 nm for AgHep-NPs and 1.5–7.5 nm for AuHep-NPs. Their antifungal activity against Candida albicans, Issatchenkia orientalis (Candida krusei), and Candida parapsilosis was assessed by the microdilution method. We show that AgHep-NPs were effective in decreasing fungus density, whereas AuHep-NPs were not. Additionally, the viability of human gingival fibroblasts was preserved by both nanoparticle types at a level above 80%, indicating a slight cytotoxicity. These results are potentially useful for applications of the described NPs mainly in dentistry and, to a lesser extent, in other biomedical areas.

Synthesis, performance and growth mechanism of silver nanoparticle coated SERS fiber probe

2019 ◽  
Vol 107 (3) ◽  
pp. 305
Author(s):  
Mengmei Geng ◽  
Yuting Long ◽  
Tongqing Liu ◽  
Zijuan Du ◽  
Hong Li ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Absorption Spectrum ◽  
Reaction Time ◽  
Growth Mechanism ◽  
Fiber Optic ◽  
Fiber Optic Probe ◽  
Visible Absorption ◽  
Fiber Probe ◽  
Surface Enhanced Raman ◽  
Optic Probe

Surface-enhanced Raman Scattering (SERS) fiber probe provides abundant interaction area between light and materials, permits detection within limited space and is especially useful for remote or in situ detection. A silver decorated SERS fiber optic probe was prepared by hydrothermal method. This method manages to accomplish the growth of silver nanoparticles and its adherence on fiber optic tip within one step, simplifying the synthetic procedure. The effects of reaction time on phase composition, surface plasmon resonance property and morphology were investigated by X-ray diffraction analysis (XRD), ultraviolet-visible absorption spectrum (UV-VIS absorption spectrum) and scanning electron microscope (SEM). The results showed that when reaction time is prolonged from 4–8 hours at 180 °C, crystals size and size distribution of silver nanoparticles increase. Furthermore, the morphology, crystal size and distribution density of silver nanoparticles evolve along with reaction time. A growth mechanism based on two factors, equilibrium between nucleation and growth, and the existence of PVP, is hypothesized. The SERS fiber probe can detect rhodamin 6G (R6G) at the concentration of 10−6 M. This SERS fiber probe exhibits promising potential in organic dye and pesticide residue detection.

The Effect of Silver Nanoparticles on Blood Cells in Rats

2012 ◽  
Vol 1 (1) ◽  
Author(s):  
S. Rezaei-Zarchi ◽  
M. Taghavi-Foumani ◽  
S. Razavi Sheshdeh ◽  
M. Negahdary ◽  
G. Rahimi
Keyword(s):  
Silver Nanoparticles ◽  
Blood Cells

Synthesis and Characterization of Silver Nanoplates by a Seed-mediated Method

2019 ◽  
Vol 29 (3) ◽  
Author(s):  
Mai Ngọc Tuan Anh
Keyword(s):  
Hydrogen Peroxide ◽  
Silver Nanoparticles ◽  
Ascorbic Acid ◽  
Silver Nitrate ◽  
Sodium Borohydride ◽  
Trisodium Citrate ◽  
Synthesis And Characterization ◽  
Silver Nanoplates ◽  
Seed Mediated

Silver nanoplates (SNPs) having different size were synthesized by a seed-mediated method. The seeds -silver nanoparticles with 4 – 6 nm diameters were synthesized first by reducing silver nitrate with sodium borohydride in the present of Trisodium Citrate and Hydrogen peroxide. Then these seeds were developed by continue reducing Ag\(^+\) ions with various amount of L-Ascorbic acid to form SNPs. Our analysis showed that the concentratrion of L-Ascorbic acid, a secondary reducing agent, played an important role to form SNPs. In addition, the size and in-plane dipole plasmon resonance wavelenght of silver nanoplates were increased when the concentration of added silver nitrate increased. The characterization of SNPs were studied by UV-Vis, FE-SEM, EDS and TEM methods.

EFFECT OF SILVER NANOPARTICLES ON THE FLUORESCENCE INTENSITY OF RHODAMINE 6G AND SULFORHODAMINE 101

2016 ◽  
Vol 75 (11) ◽  
pp. 1001-1008
Author(s):  
S.V. Nikolayev ◽  
V. V. Pozhar ◽  
M. I. Dzyubenko ◽  
K. S. Nikolayev
Keyword(s):  
Silver Nanoparticles ◽  
Fluorescence Intensity ◽  
Rhodamine 6G ◽  
Sulforhodamine 101
Sign in / Sign up

Export Citation Format

Share Document