Factors Affecting the Geometry of Silver Nanoparticles Synthesis in &lt;i&gt;Chrysosporium Tropicum&lt;/i&gt; and &lt;i&gt;Fusarium Oxysporum&lt;/i&gt;

Soni, Namita; Prakash, Soam

doi:10.3844/ajnsp.2011.112.121

Cited by 30 publications

(10 citation statements)

References 23 publications

(19 reference statements)

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“…Birla et al (25) showed the formation of larger particles at acidic PH due to aggregation, while at alkaline (pH 9 and pH 11) monodispersed and stable SNPs were found. Our results correlate with Xue et al (17) who reported that the alkaline pH was more favorable for production of SNPs by the fungus Arthroderma fulvum and disagreement with Soni& Prakash (27) who reported increase in absorption with decrease in pH. The availability of OH-ions in alkaline medium is very important for reduction of metal ions.…”

Section: Discussionsupporting

confidence: 75%

Optimization of silver nanoparticle biosynthesis process using cell-free filtrate of Aspergillus niger

Hamad Uobeed Al-Hamadani,

Abbas Kareem

2018

Qad Med J

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Nanotechnology and nanoparticle (NPs) research has attracted a lot of interest in recent decades, and there is growing attention to find more effective ways for their synthesis. The use of biological organism as bionanofactories provides a clean and promising alternative process for the fabrication of silver nanoparticles. This study confirmed the production of silver nanoparticles (SNPs) by a cost effective, safe and environment-friendly technique using silver nitrate and cell free filtrate of the fungus Aspergillus niger as the reducing agent. The optimization of different parameters, including the culture media, pH, reaction temperature, concentration of silver nitrate solution and reduction time, were carried out to achieve better control of size, shape, stability, and to increase the yield of SNPs production. The UV-visible spectrophotometric analysis of the biosynthesized silver nanoparticles by Aspergillus niger cell-free filtrate showed characteristic surface plasmon absorption peak at 420 nm. The presence of proteins as viable reducing agents for the formation and stability of SNPs was recorded using Fourier transform infrared spectroscopic analysis (FTIR) .Further scanning electron microscopy (SEM) micrograph showed the formation of spherical, well-dispersed nanoparticles with size ranging between 15 and 50 nm in diameter. The element composition of the mixture sample was obtained from the Energy Dispersive Analysis of X-ray (EDX). It concluded that the optimum condition for biosynthesis of SNPs were the use of Potato dextrose broth medium at pH 9, 30°C for 120 h with 1mM silver nitrate.

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Section: Discussionsupporting

confidence: 75%

Optimization of silver nanoparticle biosynthesis process using cell-free filtrate of Aspergillus niger

Hamad Uobeed Al-Hamadani,

Abbas Kareem

2018

Qad Med J

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“…lycopersici; however, XRD pattern showed also the presence of AgCl nanoparticles. Soni and Prakash (2011) demonstrated the presence of Ag o nanoparticles together with silver oxides mixtures and other impurities from F. oxysporum Schltdl 2480 and from Chrysosporium tropicum Carmichael-2828 strains. Penicillium atramentosum KM was suggested to be able to produce Ag o nanoparticles; however, the XRD pattern represented a mixture of silver oxide nanoparticles and not Ag o nanoparticles (Sarsar et al 2015).…”

Section: Fungimentioning

confidence: 96%

Antimicrobial activity of biogenic silver nanoparticles, and silver chloride nanoparticles: an overview and comments

Durán

Nakazato

Seabra

2016

Appl Microbiol Biotechnol

246

127

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The antimicrobial impact of biogenic-synthesized silver-based nanoparticles has been the focus of increasing interest. As the antimicrobial activity of nanoparticles is highly dependent on their size and surface, the complete and adequate characterization of the nanoparticle is important. This review discusses the characterization and antimicrobial activity of biogenic synthesized silver nanoparticles and silver chloride nanoparticles. By revising the literature, there is confusion in the characterization of these two silver-based nanoparticles, which consequently affects the conclusion regarding to their antimicrobial activities. This review critically analyzes recent publications on the synthesis of biogenic silver nanoparticles and silver chloride nanoparticles by attempting to correlate the characterization of the nanoparticles with their antimicrobial activity. It was difficult to correlate the size of biogenic nanoparticles with their antimicrobial activity, since different techniques are employed for the characterization. Biogenic synthesized silver-based nanoparticles are not completely characterized, particularly the nature of capped proteins covering the nanomaterials. Moreover, the antimicrobial activity of theses nanoparticles is assayed by using different protocols and strains, which difficult the comparison among the published papers. It is important to select some bacteria as standards, by following international foundations (Pharmaceutical Microbiology Manual) and use the minimal inhibitory concentration by broth microdilution assays from Clinical and Laboratory Standards Institute, which is the most common assay used in antibiotic ones. Therefore, we conclude that to have relevant results on antimicrobial effects of biogenic silver-based nanoparticles, it is necessary to have a complete and adequate characterization of these nanostructures, followed by standard methodology in microbiology protocols.

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“…This is due to the influence of variations in pH on the generation of nucleation centers, which are crucial for the development of these materials. While synthesizing NPs, the manipulation of pH levels can be employed as a means to regulate both the size and geometry of the particles, as observed in case of silver NPs generated from algal species [164]. It has been observed in multiple investigations that the size of NPs is anticipated to be greater in acidic fluids compared to basic media for selected nanomaterials.…”

Section: Effect Of Ph On Np Synthesismentioning

confidence: 99%

Recent Developments in Lignocellulosic Biofuel Production with Nanotechnological Intervention: An Emphasis on Ethanol

Dutta,

Saravanabhupathy,

Anusha

et al. 2023

Catalysts

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Biofuel, an inexhaustible fuel source, plays a pivotal role in the contemporary era by diminishing the dependence on non-renewable energy sources and facilitating the mitigation of CO2 emissions. Due to the many constraints in existing technology and the resulting increased costs, the production of biofuels on a large scale is a laborious process. Furthermore, the methods used to convert varied feedstock into the intended biofuel may vary based on the specific techniques and materials involved. The demand for bioethanol is increasing worldwide due to the implementation of regulations by world nations that mandates the blending of bioethanol with petrol. In this regard, second-generation bioethanol made from lignocellulosic biomass is emerging at a rapid rate. Pre-treatment, hydrolysis, and fermentation are some of the technical, practical, and economic hurdles that the biochemical conversion method must overcome. Nanoparticles (NPs) provide a very effective approach to address the present obstacles in using biomass, due to their selectivity, energy efficiency, and time management capabilities, while also reducing costs. NPs smaller dimensions allow them to be more effective at interacting with lignocellulosic components at low concentrations to release carbohydrates that can be utilized to produce bioethanol. This article provides a concise overview of various biofuels and the nanotechnological advancements in producing it, with a particular emphasis on ethanol. It provides a detailed discussion on the application of nanotechnology at each stage of ethanol production, with a particular emphasis on understanding the mechanism of how nanoparticles interact with lignocellulose.

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Factors Affecting the Geometry of Silver Nanoparticles Synthesis in <i>Chrysosporium Tropicum</i> and <i>Fusarium Oxysporum</i>

Cited by 30 publications

References 23 publications

Optimization of silver nanoparticle biosynthesis process using cell-free filtrate of Aspergillus niger

Optimization of silver nanoparticle biosynthesis process using cell-free filtrate of Aspergillus niger

Antimicrobial activity of biogenic silver nanoparticles, and silver chloride nanoparticles: an overview and comments

Recent Developments in Lignocellulosic Biofuel Production with Nanotechnological Intervention: An Emphasis on Ethanol

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