Green synthesis of silver nanoparticles using Givotia moluccana leaf extract and evaluation of their antimicrobial activity

Sana, Siva Sankar; Dogiparthi, Lakshman Kumar

doi:10.1016/j.matlet.2018.05.009

Cited by 101 publications

(56 citation statements)

References 16 publications

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“…In spite the numerous advantages of this approach, the process still has some bottle-necks, the most important of which is represented by the difficulties in obtaining homogenous nanoparticles in terms of shape and, especially, size, as well as the elucidation of the specificity of individual biomolecules [3]. Though several types of metallic nanoparticles that are synthesized by using plant extracts have been studied target organisms (leading to their proposal as antimicrobial [4], antiviral [5] or cytogenotoxic agents [6]), their possible negative toxicity has not been thoroughly established. The present review aims to present the advances that have been recorded in the last year in the area of phytosynthesized nanoparticle applications and toxicity studies, as well to underline the shortcomings of the encountered approach.…”

Section: Introductionmentioning

confidence: 99%

Phytosynthesized Metallic Nanoparticles—between Nanomedicine and Toxicology. A Brief Review of 2019′s Findings

et al. 2020

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Phytosynthesized nanoparticles represent a continuously increasing field of research, with numerous studies published each year. However, with the emerging interest in this area, the quality of the published works is also continuously increasing, switching from routine antioxidant or antimicrobial studies on trivial microbial lines to antibiotic-resistant strains or antitumoral studies. However, this increasing interest has not been not reflected in the studies regarding the toxicological effects of nanoparticles (NPs); this should be a subject of greatest interest, as the increasing administration of NPs in general (and phytosynthesized NPs in particular) could lead to their accumulation in the environment (soil, water and living organisms). The present review aims to present the most recent findings in the application of phytosynthesized NPs as antimicrobial and antitumoral agents, as well as the results regarding their toxicological potential.Materials 2020, 13, 574 2 of 32 in terms of their toxic potential towards target organisms (leading to their proposal as antimicrobial [4], antiviral [5] or cytogenotoxic agents [6]), their possible negative toxicity has not been thoroughly established. The present review aims to present the advances that have been recorded in the last year in the area of phytosynthesized nanoparticle applications and toxicity studies, as well to underline the shortcomings of the encountered approach. The literature review survey was performed on multiple databases (Scopus, Web of Science, ScienceDirect, SpringerLink, PubMed) and used the main keywords "nanoparticles" and "extract" (as the term "phytosynthesis" was not adopted by all the authors). From the returned results, only the works that were published in the last year (2019) were selected. Furthermore, a supplementary selection was performed by using keywords as "antimicrobial," "cytotoxicity," and "toxicology" (results presented in Figure 1). The results of this preliminary selection led to the return of approximately 1800 unique works (from all the databases). A preliminary validation was manually performed (by reading the keywords and abstract) in order to remove the "false-positive" results. The final validation was performed by reading the entire manuscript. The criteria for inclusion in the present review were: (i) the use of phytosynthesized nanoparticles that were obtained in the laboratory; (ii) the existence of analytical studies for the characterization of the nanoparticles; and (iii) in-depth applications reports. The review is structured in different chapters for each potential application that is related to the toxic effect of the metallic nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Phytosynthesized Metallic Nanoparticles—between Nanomedicine and Toxicology. A Brief Review of 2019′s Findings

et al. 2020

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“…The experimental results shown that the silver nanoparticles with the polymer were coated on average by less than 30 nm. Based on previous studies [45], particle dimensions play an important role in the antibacterial activity of the coating and, therefore, this must be monitored in the final coating assembly. In the same way, the synthesis of silver nanoparticles using the Tollens reagent and an economic reducing agent, such as D-glucose, allowed control of the size and shape of the nanoparticles deposited in the PEEK [46].…”

Section: Transmission Electron Microscopy (Tem) Analysismentioning

confidence: 99%

“…The silver nanoparticles in cationic form penetrate the cell, deforming the cell membrane, and interacting with some proteins; the silver nanoparticles also interact with the sulfur and phosphorus bases contained in the DNA, causing an interruption in DNA replication and subsequent cell death [36,37]. Likewise, Ag + ions form free radicals that attack respiratory enzymes which are essential for cell replication [45,59].…”

Section: Antibacterial Testmentioning

confidence: 99%

Coating of Polyetheretherketone Films with Silver Nanoparticles by a Simple Chemical Reduction Method and Their Antibacterial Activity

et al. 2019

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The coating of polymeric substrate polyetheretherketone (PEEK) with silver nanoparticles (AgNPs) was carried out by a wet chemical route at room temperature. The coating process was developed from the Tollens reagent and D-glucose as reducing agent. The resulting composite exhibited antimicrobial activity. The PEEK films were coated with a single layer and two layers of silver nanoparticles in various concentrations. The crystallographic properties of the polymer and the silver nanoparticles were analyzed by X-ray diffraction (XRD). Fourier transform infrared spectra (FTIR) show the interaction between the silver nanoparticles with the polymeric substrate. Transmission electron microscope (TEM) images confirmed the obtaining of metallic nanoparticles with average sizes of 25 nm. It was possible to estimate the amount of silver deposited on PEEK with the help of thermogravimetric analysis. The morphology and shape of the AgNPs uniformly deposited on the PEEK films was ascertained by the techniques of scanning electron microscopy (SEM) and atomic force microscopy (AFM), evidencing the increase in the amount of silver by increasing the concentration of the metal precursor. Finally, the antibacterial activity of the films coated with Ag in Escherichia coli, Serratia marcescens and Bacillus licheniformis was evaluated, evidencing that the concentration of silver is crucial in the cellular replication of the bacteria.

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“…Synthesis of nanoparticles by biological methods is clean, nontoxic and biocompatible, offering the synthesis of nanoparticles with a wide range of shapes, sizes, compositions and physiochemical properties . Also, plant extracts have a higher reduction potential than microbial culture media, thereby requiring less time for the formation of nanoparticles . However, the production speed, quality and other characteristics of the nanoparticles produced using plant extracts depend on factors such as nature of plant extract, concentration of extract, salt concentration, pH, temperature and duration of reaction …”

Section: Introductionmentioning

confidence: 99%

“…Also, plant extracts have a higher reduction potential than microbial culture media, thereby requiring less time for the formation of nanoparticles . However, the production speed, quality and other characteristics of the nanoparticles produced using plant extracts depend on factors such as nature of plant extract, concentration of extract, salt concentration, pH, temperature and duration of reaction …”

Section: Introductionmentioning

confidence: 99%

Synthesis of titanium nanoparticles using Allium eriophyllum Boiss aqueous extract by green synthesis method and evaluation of their remedial properties

Seydi

Saneei

Jalalvand

et al. 2019

Applied Organom Chemis

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The application of nanotechnologies to medicine, or nanomedicine, which has already demonstrated its tremendous impact on the pharmaceutical and biotechnology industries, is rapidly becoming a major driving force behind ongoing developments in the antimicrobial and wound healing fields. This study confirms the potential of Allium eriophyllum Boiss aqueous extract for the green synthesis of titanium nanoparticles (TiNPs). Also, we reveal the antioxidant, cytotoxicity, cutaneous wound healing, antifungal and antibacterial properties of TiNPs. These nanoparticles were characterized using Fourier transform infrared (FT-IR) and UV-visible spectroscopies, X-ray diffraction (XRD), transmission electron microscopy (TEM) and field emission scanning electron microscopy (SEM). FT-IR findings suggested molecular interactions of compounds in the plant were the sources of reducing power, reducing titanium ions to TiNPs. In XRD analysis, 22.8 nm was measured for the crystal size of the nanoparticles. SEM and TEM images indicated a uniform spherical morphology and average diameters of 22 nm. 2,2-Diphenyl-1-picrylhydrazyl experiments were conducted to assess the antioxidant activities, which indicated similar antioxidant potentials for TiNPs and butylated hydroxytoluene. In the antimicrobial part of this study, agar diffusion experiments were done to determine the antibacterial and antifungal characteristics. TiNPs had antifungal activities against Candida guilliermondii, C. krusei, C. albicans and C. glabrata and antibacterial potentials against Gram-negative bacteria (Pseudomonas aeruginosa, Salmonella typhimurium and Escherichia coli O157:H7) and Gram-positive bacteria (Staphylococcus aureus, Streptococcus pneumoniae and Bacillus subtilis). Also, these nanoparticles did not have any cytotoxicity against human umbilical vein endothelial cells. In in vivo experiments, TiNP ointment significantly decreased (p ≤ 0.01) wound area, total cells, macrophages, neutrophils and lymphocytes and notably increased (p ≤ 0.01) wound contracture, vessels, hydroxyproline, hexosamine, hexuronic acid, fibrocytes and fibrocyte/fibroblast ratio in rats. The results of FT-IR, UV, XRD, TEM and SEM analyses confirm that aqueous extract of A. eriophyllum leaves can be used to yield TiNPs with notable antioxidant, antibacterial, antifungal and

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Green synthesis of silver nanoparticles using Givotia moluccana leaf extract and evaluation of their antimicrobial activity

Cited by 101 publications

References 16 publications

Phytosynthesized Metallic Nanoparticles—between Nanomedicine and Toxicology. A Brief Review of 2019′s Findings

Phytosynthesized Metallic Nanoparticles—between Nanomedicine and Toxicology. A Brief Review of 2019′s Findings

Coating of Polyetheretherketone Films with Silver Nanoparticles by a Simple Chemical Reduction Method and Their Antibacterial Activity

Synthesis of titanium nanoparticles using Allium eriophyllum Boiss aqueous extract by green synthesis method and evaluation of their remedial properties

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