نتایج جستجو برای: nanoparticles of silver

تعداد نتایج: 21182698  

2014
Ropisah Mie Mohd Wahid Samsudin Laily B Din Azizan Ahmad Nazlina Ibrahim Siti Noor Adnalizawati Adnan

Development of a green chemistry process for the synthesis of silver nanoparticles has become a focus of interest. This would offer numerous benefits, including ecofriendliness and compatibility for biomedical applications. Here we report the synthesis of silver nanoparticles from the reduction of silver nitrate and an aqueous extract of the lichen Parmotrema praesorediosum as a reductant as we...

2014
Kanniah Paulkumar Gnanadhas Gnanajobitha Mahendran Vanaja Shanmugam Rajeshkumar Chelladurai Malarkodi Kannaiyan Pandian Gurusamy Annadurai

Utilization of biological materials in synthesis of nanoparticles is one of the hottest topics in modern nanoscience and nanotechnology. In the present investigation, the silver nanoparticles were synthesized by using the leaf and stem extract of Piper nigrum. The synthesized nanoparticle was characterized by UV-vis spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM), tran...

2015
Arif Ullah Khan Yun Wei Zia Ul Haq Khan Kamran Tahir Shahab Ullah Khan Aftab Ahmad Faheem Ullah Khan Li Cheng Qipeng Yuan

The Present Bio-synthesis is an efficient, fast, cheap, nontoxic, simple and eco-friendly protocol for silver nanoparticles synthesis, which is more beneficial than commonly used physiochemical methods. Here in silver nanoparticles are biosynthesized using Citrus sinensis var. Kozan yerly fruit juice as reducing and stabilizing agent. The X-ray diffraction (XRD) pattern confirms the crystalline...

Journal: :molecular biology research communications 2013
hajar zamani ali moradshahi

plant phenolics have high reducing capacity which can be exploited in the synthesis of nanomaterials. in the present study, phytoreductant vanillic acid is used to produce and coat silver nanoparticles. the effects of ag nanoparticles on the unicellular green algae d. salina were then investigated. under optimum  ph and temperature, silver ions were reduced to silver metal by vanillic acid. the...

2011
Hidetaka Noritomi Yoshihiro Umezawa Saori Miyagawa Satoru Kato

Silver nanoparticles were synthesized in reverse micelles consisting of sucrose fatty acid esters by dissolving reactant powder in the water pool of reverse micelles through the solid-liquid extraction. Silver nanoparticles having various sizes and shapes were obtained at high concentration. The size of silver nanoparticles was controlled by reaction temperature. Moreover, the size of silver na...

Journal: :The Analyst 2014
Daniela Tiedemann Ulrike Taylor Christoph Rehbock Jurij Jakobi Sabine Klein Wilfried A Kues Stephan Barcikowski Detlef Rath

Metal and alloy nanoparticles are increasingly developed for biomedical applications, while a firm understanding of their biocompatibility is still missing. Various properties have been reported to influence the toxic potential of nanoparticles. This study aimed to assess the impact of nanoparticle size, surface ligands and chemical composition of gold, silver or gold-silver alloy nanoparticles...

2014
Mahipal S. Shekhawat M. Manokari N. Kannan J. Revathi R. Latha

Present study reports the biogenesis of silver nanoparticles from the leaves of Cardiospermum halicacabum L. and their characterization. C. halicacabum has been used in traditional medicines but so far it has not been tested for synthesis of silver nanoparticles (AgNPs). The aqueous silver ions exposed to the herbal extract, which were reduced and the nanoparticles were synthesized. The presenc...

2013
G. Yamal P. Sharmila K. S. Rao P. Pardha-Saradhi

We discovered that Yeast Extract Mannitol (YEM) medium possessed immense potential to generate silver nanoparticles from AgNO3 upon autoclaving, which was evident from (i) alteration in color of the medium; (ii) peak at ∼410 nm in UV-Vis spectrum due to surface plasmon resonance specific to silver nanoparticles; and (iii) TEM investigations. TEM coupled with EDX confirmed that distinct nanopart...

B. Deva Prasad Raju B. Praveen G. Narasimha, K. Mallikarjuna

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. Transm...

Background and purpose:  Angiogenesis has a role in many vital processes also many developmental processes are influenced by an electromagnetic field. In the present study the synergic effects of silver nanoparticles and low-frequency electromagnetic field on angiogenesis in the chick embryo chorioallantoic membrane (CAM). Materials and method: In this experimental study, (Ross strain )...

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