نتایج جستجو برای: silver nanoparticles.

تعداد نتایج: 141266  

Journal: :international journal of nano dimension 0
s. abdeen department of nanotechnology, noorul islam university, kumaracoil, tamil nadu, india. s. geo department of microbiology, noorul islam college of arts and sciences, tamil nadu, india s. sukanya department of biotechnology, noorul islam college of arts and sciences, tamil nadu, india p.k. praseetha department of nanotechnology, noorul islam university, kumaracoil, tamil nadu, india r.p dhanya department of microbiology, noorul islam college of arts and sciences, tamil nadu, india

silver is composed of a large percentage of silver oxide due to their large ratio of surface to bulk silver atoms. silver nanoparticles have been a potent antibacterial, antifungal, anti-viral and anti-inflammatory agent. a simple, eco-friendly, inexpensive biosynthetic method was employed to synthesize silver nanoparticles.  the present study aimed at the comparative study of silver nanopartic...

Journal: :jundishapur journal of microbiology 0
hamed alizadeh young researchers and elite club, zanjan branch, islamic azad university, zanjan, ir iran mojtaba salouti biology research center, zanjan branch, islamic azad university, zanjan, ir iran; biology research center, zanjan branch, islamic azad university, moallem st., etemadieh, zanjan, ir iran. tel/fax: +98-2414224024 reza shapouri biology research center, zanjan branch, islamic azad university, zanjan, ir iran

conclusions: the results showed that silver nanoparticles have an antimicrobial effect against intramacrophage b. abortus 544. results: the well diffusion agar study showed that silver nanoparticles have an antimicrobial effect on b. abortus 544. the mic and mbc of silver nanoparticles against b. abortus 544 were; 6 ppm and 8 ppm, respectively. the silver nanoparticles showed antibacterial effe...

Journal: :international journal of nano dimension 0
kalpana kanchan microbiology lab., department of botany, dayalbagh educational institute, dayalbagh, agra- 282 110, india s. gupta microbiology lab., department of botany, dayalbagh educational institute, dayalbagh, agra- 282 110, india g.p. satsangi microbiology lab., department of botany, dayalbagh educational institute, dayalbagh, agra- 282 110, india j.n. shrivastava microbiology lab., department of botany, dayalbagh educational institute, dayalbagh, agra- 282 110, india

interaction of chrysosporium sps. and aspergillus sps. with aqueous agno3 was investigated for synthesis of silver nanoparticles. biological reduction and extracellular synthesis of silver nanoparticles in 28 hour at 270c and ph 5.6 was done. the nanometallic dispersion was characterized by surface plasmon absorbance measuring at 424 – 530 nm for ag nanoparticles. high resolution transmission e...

Journal: :international journal of nano dimension 0
g. narasimha applied microbiology laboratory, department of virology, sri venkateswara university, tirupati- 517502 andhra pradesh, india. b. praveen applied microbiology laboratory, department of virology, sri venkateswara university, tirupati- 517502 andhra pradesh, india. k. mallikarjuna department of physics, sri venkateswara university, tirupati-517502 andhra pradesh, india. b. deva prasad raju department of physics, sri venkateswara university, tirupati-517502 andhra pradesh, india.

in this paper we report an eco-friendly route for the synthesis of sliver nanoparticles using agaricus bisporus (white button mushroom) extract. the synthesized silver nanoparticles were confirmed and characterized by uv-visible spectrum of the aqueous solution containing silver ions showed a peak at 420 nm corresponding to the surface plasmon absorbance of silver nanoparticles. transmission el...

Journal: :iranian journal of biotechnology 2010
zahra ranjbar navazi mohammad pazouki farah sadat halek

in this study, silver nanoparticles were synthesized  using the fungus, aspergillus fumigatus. the effects of three independent variables including glucose content of culture media, initial ph and initial spore concentration on biosynthesis of silver nanoparticles were investigated. these variables affect cell morphology, cell mass, size and morphology of silver nanoparticles and degree of silv...

Journal: :journal of chemical health risks 0
hashem akhlaghi department of chemistry, sabzevar branch, islamic azad university, sabzevar, iran sedighe sadat akhlaghi assistant professor, department of nephrology, shahid beheshti medical university, tehran, iran

an aqueous extract of pimpinella anisum was used for green synthesis of silver nanoparticles by bio reduction of an aqueous solution of silver nitrate. silver nanoparticles were characterized by uv–vis spectrometry, fourier transform infrared spectroscopy (ftir), x-ray diffraction (xrd) analysis, scanning electron microscopy (sem) and energy-dispersive x-ray analysis (edax). the increase in abs...

2015
B. Gowramma U. Keerthi Mokula Rafi D. Muralidhara Rao

In the present study, synthesis, characterization, and the antibacterial activity of silver nanoparticles from native isolate of Corynebacterium glutamicum has been reported. Silver nanoparticles were synthesized by challenging the dried biomass of C. glutamicum with aqueous diamine silver ([Ag (NH3)2]+) containing 1 mM AgNO3. Synthesized silver nanoparticles (AgNPs) were characterized by ultra...

2016
Divya Bhatia Ashwani Mittal Deepak Kumar Malik

Emergence of resistant microbes to conventional antibiotics and increased emphasis on health-care costs has raised the concern for the development of new effective antimicrobial reagents. Silver nanoparticles being an excellent broad-spectrum antibacterial agent could be considered as a suitable alternative for existing antibiotic. This study demonstrates the extra-cellular synthesis of stable ...

2011
H. B. Patil S. V. Borse D. R. Patil U. K. Patil H. M. Patil

The silver nanoparticles are synthesized by using microbial reduction of silver ions in the presence of fungus Aspergillus flavus . The fungus , Aspergillus flavus when challenged with silver nitrate solution accumulated silver nanoparticles on the surface of its cell wall in 96 hr . The silver nanoparticles synthesized are characterized by using UV-spectroscopy. An absorption peak at 420 nm in...

2015
R. Andrew Davidson Donald S. Anderson Laura S. Van Winkle Kent E. Pinkerton T. Guo

Following a 6-h inhalation exposure to aerosolized 20 and 110 nm diameter silver nanoparticles, lung tissues from rats were investigated with X-ray absorption spectroscopy, which can identify the chemical state of silver species. Lung tissues were processed immediately after sacrifice of the animals at 0, 1, 3, and 7 days post exposure and the samples were stored in an inert and low-temperature...

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