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"Antimicrobial Silver Nanoparticles." nanoComposix.

After that, the reaction mixture contains synthesized silver nanoparticles was centrifuged at 10,000×g for 15min and the pellet was rinsed with distilled water to get rid of unwanted biological molecules.

40µg of optimized silver nanoparticles exhibited significant DPPH free radical scavenging activity.

Figure 4 illustrates the TGA profile of silver nanoparticles. TGA profile reveals that, there is no mass loss and confirms the absence of acetate as an integral part of silver nanoparticles.

Biological Synthesis of Silver Nanoparticles

Further studied will be needed to find out the exact mechanism of action of silver nanoparticles.

Lo´pez-Quintela Department of Physical Chemistry, UniVersity of Part 1: Silver Nanoparticle Synthesis and Spectroscopy Synthesis and Study of Silver Nanoparticles.



Figure 2.1: Chemical structure of silver
2.4

Geniotrigona thoracica

From genus Trigona, is the largest genus of stingless bees.
Table 2.1: Scientific classification of
Geniotrigona thoracica
honeybee
Chapter 3: Methodology
3.1 Synthesis of Silver Nanoparticles
3.2 Characterization of Silver Nanoparticles
3.3 Antimicrobial test
The antimicrobial efficacy of silver nanoparticles formed will be tested on
Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa
and
Bacillus subtilis
.

Synthesis and Study of Silver Nanoparticles.

PXRD confirmed the reflections of silver nanoparticles at corresponding 2θ values respectively.

a) Scheme of synthesizing albumin-based nanoparticles with different strategies and the biomedical applications of the prepared nanoparticles. Parts of the figure adapted with permissions from [, ].

Plant extracts represent a new source of metal nanoparticle synthesis due to its simplicity and ability to utilise one or more phyto-remediation mechanisms (rhizo-filtration, phyto-volatilization, etc).

1.3 ObjectivesTo produce silver nanoparticles from Geniotrigona thoracica (G.
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Synthesis of silver nanoparticles.

The present study showed a simple, rapid and economical route to synthesize Ag-NPs from red seaweeds. The zone of inhibition clearly showed that the fungal strains tested were susceptible to silver nanoparticles. Thus the present study proved that the silver nano-particles synthesized from Gelidiella acerosa seem to be promising and effective antifungal agent against the pathogenic fungal strains.

Keywords Nanoparticle, Synthesis, Silver nanoparticle, Mechanism.

The evaluation of antibiotic resistant pathogenic fungi has stimulated the search for effective antifungal agent from alternative sources. Many studies have shown the antimicrobial effects of nano-Ag (–). However, only limited literatures supports the effects of Ag-NPs against fungal pathogens. Further the nanoparticles synthesis by green route by using Gelidiella acerosa extract was found highly active against tested fungal species at a concentration of 50 µl of synthesized Ag nanoparticles. The results showed higher anti-fungal activity against Mucor indicus (22.3 vs. 21.3) and Trichoderma reesei (17.2 vs. 14.3), whereas moderate activity was revealed against Fusarium dimerum (13.15 vs. 13.0), Humicola insolens (12.2 vs. 12.1) when compared with standard antifungal agent Clotrimazole ().

PDF Silver Nanoparticles Synthesis of Mentha arvensis Extracts 24 T.

Excitation of the surface Plasmon vibrations of silver nanoparticles would account for the observed colour change as the first confirmatory test revealing the formation of colloidal AgNPs in accordance with other reports [], [].

Silver nanoparticles as antimicrobial agent: A case study on E.

HR-TEM was equipped with an Energy-Dispersive Spectrum (EDX) which analyzed the elements in the biosynthesized nanoparticle.

We observed spherical and few non spherical silver nanoparticles.

Also some aggregation was showed in (Figure 4a-c) it due to less concentration of leaf broth and its functional groups involved in stabilization of biologically synthesized nanoparticles.

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