Mechanistic aspects of biosynthesis of silver nanoparticles by several Fusarium oxysporum strains

Abstract

Extracellular production of metal nanoparticles by several strains of the fungus Fusarium oxysporum was carried out. It was found that aqueous silver ions when exposed to several Fusarium oxysporum strains are reduced in solution, thereby leading to the formation of silver hydrosol. The silver nanoparticles were in the range of 20-50 nm in dimensions. The reduction of the metal ions occurs by a nitrate-dependent reductase and a shuttle quinone extracellular process. The potentialities of this nanotechnological design based in fugal biosynthesis of nanoparticles for several technical applications are important, including their high potential as antibacterial material.

Green synthesis, characterization and antibacterial activities of silver nanoparticles from strawberry fruit extract

“…Although successes have been achieved with these techniques, environmental issues associated with most chemical substances used as reducing agents, technical laboriousness, and high fi nancial demand have made these methods less attractive. Economical and eco-friendly synthetic route considered by researchers at present is biosynthesis using bacteria 16 fungi 17, 18 biomolecules 19 and extensively, plant parts 4, 20, 21, 22 . The use of plant extract in the synthesis of metal nanoparticles is of remarkable interest because they can act as reducing agents as well as capping agents in addition to their environmental friendliness, sustainability and cost-effectiveness.…”

Application of Terminalia Catappa in Preparation of Silver Nanoparticles to Develop Antibacterial Nylon

“…The method which uses the principle of green chemistry, is growing and widely used today because the chemical reduction process is feared to produce highly toxic properties when applied in the field of biomedicine. The purpose of the method is to replace toxic substances in chemical reduction processes 8 .…”

Silver Nanoparticles Effect on Antimicrobial and Antifungal Activity of New Heterocycles

“…14 Metal nanoparticles (Me-NPs), which have a high specific surface area and a high fraction of surface atoms have been studied extensively because of their unique physicochemical characteristics including catalytic activity, optical properties, electronic properties, antimicrobial activity, and magnetic properties. [15][16][17] Among Me-NPs, silver nanoparticles (AgNPs) have been known to have inhibitory and bactericidal effects. 18 It can be expected that the high specific surface area and high fraction of surface atoms of Ag-NPs will lead to high antimicrobial activity as compared with bulk silver metal.…”