Nanocomposite film with antimicrobial activity based on gold nanoparticles, chitosan and aminopropylsilane

This work deals with the identification of a predominant thraustochytrid strain, the optimization of culture conditions, the synthesis of nanoparticles, and the evaluation of antioxidant and antimicrobial activities in biomass extracts and nanoparticles. Thraustochytrium kinnei was identified as a predominant strain from decomposing mangrove leaves, and its culture conditions were optimized for maximum biomass production of 13.53 g·L−1, with total lipids of 41.33% and DHA of 39.16% of total fatty acids. Furthermore, the strain was shown to synthesize gold and silver nanoparticles in the size ranges of 10–85 nm and 5–90 nm, respectively. Silver nanoparticles exhibited higher total antioxidant and DPPH activities than gold nanoparticles and methanol extract of the strain. The silver nanoparticles showed higher antimicrobial activity than gold nanoparticles and petroleum ether extract of the strain. Thus, Thraustochytrium kinnei is proven to be promising for synthesis of silver nanoparticles with high antioxidant and antimicrobial activity.

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Isolation, biosynthesis and antimicrobial activity of gold nanoparticles produced with extracts of Anabaena spiroides

Bioprocess and Biosystems Engineering ◽

10.1007/s00449-021-02544-4 ◽

2021 ◽

Author(s):

Chinmayee Priyadarshini Mandhata ◽

Chita Ranjan Sahoo ◽

Chandrika Saloni Mahanta ◽

Rabindra Nath Padhy

Keyword(s):

Antimicrobial Activity ◽

Gold Nanoparticles

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Synthesis of Gold Nanoparticles Using Leaf Extract of Ziziphus zizyphus and their Antimicrobial Activity

Nanomaterials ◽

10.3390/nano8030174 ◽

2018 ◽

Vol 8 (3) ◽

pp. 174 ◽

Cited By ~ 72

Author(s):

Alaa Aljabali ◽

Yazan Akkam ◽

Mazhar Al Zoubi ◽

Khalid Al-Batayneh ◽

Bahaa Al-Trad ◽

...

Keyword(s):

Antimicrobial Activity ◽

Gold Nanoparticles ◽

Leaf Extract

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Biosynthesis of Gold Nanoparticles Using Fusarium oxysporum f. sp. cubense JT1, a Plant Pathogenic Fungus

ISRN Biotechnology ◽

10.5402/2013/515091 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 9

Author(s):

Janki N. Thakker ◽

Pranay Dalwadi ◽

Pinakin C. Dhandhukia

Keyword(s):

Antimicrobial Activity ◽

Gold Nanoparticles ◽

Chloride Solution ◽

Pathogenic Fungus ◽

Particle Size Analysis ◽

Size Analysis ◽

Plant Pathogenic Fungus ◽

Extracellular Synthesis ◽

Vis Spectroscopy ◽

Methods Of Synthesis

The development of reliable processes for the synthesis of gold nanoparticles is an important aspect of current nanotechnology research. Recently, reports are published on the extracellular as well as intracellular biosynthesis of gold nanoparticles using microorganisms. However, these methods of synthesis are rather slow. In present study, rapid and extracellular synthesis of gold nanoparticles using a plant pathogenic fungus F. oxysporum f. sp. cubense JT1 (FocJT1) is reported. Incubation of FocJT1 mycelium with auric chloride solution produces gold nanoparticles in 60 min. Gold nanoparticles were characterized by UV-Vis spectroscopy, FTIR, and particle size analysis. The particles synthesized were of 22 nm sized, capped by proteins, and posed antimicrobial activity against Pseudomonas sp.

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