نتایج جستجو برای: agnps

تعداد نتایج: 1823  

2014
Ding Qu Wenjie Sun Yan Chen Jing Zhou Congyan Liu

A rapid synthesis of silver nanoparticles (AgNPs) using Agrimoniae herba extract as reducing agent and stabilizer (A. herba-conjugated AgNPs [AH-AgNPs]) were designed, characterized, and evaluated for antitumor therapy feasibility. In this study, critical factors in the preparation of silver nanoparticles, including extraction time, reaction temperature, the concentration of AgNO3, and A. herba...

2013
S. M. El-Sonbaty

Silver nanoparticles (AgNPs) were biologically synthesized using aqueous extract of Agaricus bisporus fungi. Physicochemical analysis of silver nanoparticles revealed that they are of spherical shape ranged size of 8-20 nm, and their zeta potential equal -7.23 mV. Silver nanoparticles showed a dose-dependent cytotoxic effect on MCF-7 breast cancer cells with LD50 (50 μg/ml). Mice bearing Ehrlic...

2014
Shivaraj Ninganagouda Vandana Rathod Dattu Singh Jyoti Hiremath Ashish Kumar Singh Jasmine Mathew Manzoor ul-Haq

Silver Nanoparticles (AgNPs), the real silver bullet, are known to have good antibacterial properties against pathogenic microorganisms. In the present study AgNPs were prepared from extracellular filtrate of Aspergillus niger. Characterization of AgNPs by UV-Vis spectrum reveals specific surface plasmon resonance at peak 416 nm; TEM photographs revealed the size of the AgNPs to be 20-55 nm. Av...

Journal: :Journal of applied microbiology 2014
L Pereira N Dias J Carvalho S Fernandes C Santos N Lima

AIMS To characterize and explore the potential in extracellular biosynthesis of silver nanoparticles (AgNPs) by Penicillium chrysogenum and Aspergillus oryzae and to investigate the antifungal effect of chemically vs biologically synthesized AgNPs comparing with conventional antifungal drugs against Trichophyton rubrum. METHODS AND RESULTS Chemically synthesized AgNPs (Chem-AgNPs) coated with...

2015
Christine Ying Shan Chan Jill Man Ying Chiu John A Craft

Silver nanoparticles (AgNPs), owing to their unique physical and chemical properties, have become increasingly popular in consumer products. However, data on their potential biological effects on marine organisms, especially invertebrates, remain very limited. This proof of principle study reports the chronic sub-lethal toxicity of two coated AgNPs (oleic acid coated AgNPs and polyvinylpyrrolid...

Journal: :International journal of nanomedicine 2015
Xi-Feng Zhang Jung-Hyun Park Yun-Jung Choi Min-Hee Kang Sangiliyandi Gurunathan Jin-Hoi Kim

BACKGROUND Silver nanoparticles (AgNPs) have attracted much interest and have been used for antibacterial, antifungal, anticancer, and antiangiogenic applications because of their unique properties. The increased usage of AgNPs leads to a potential hazard to human health. However, the potential effects of AgNPs on animal models are not clear. This study was designed to investigate the potential...

2016
Xi-Feng Zhang Wei Shen Sangiliyandi Gurunathan

Silver nanoparticles (AgNPs) have attracted increased interest and are currently used in various industries including medicine, cosmetics, textiles, electronics, and pharmaceuticals, owing to their unique physical and chemical properties, particularly as antimicrobial and anticancer agents. Recently, several studies have reported both beneficial and toxic effects of AgNPs on various prokaryotic...

Journal: :Environmental science & technology 2014
Su-Juan Yu Yong-Guang Yin Jing-Bo Chao Mo-Hai Shen Jing-Fu Liu

The fast growing and abundant use of silver nanoparticles (AgNPs) in commercial products alerts us to be cautious of their unknown health and environmental risks. Because of the inherent redox instability of silver, AgNPs are highly dynamic in the aquatic system, and the cycle of chemical oxidation of AgNPs to release Ag(+) and reconstitution to form AgNPs is expected to occur in aquatic enviro...

Journal: :Environmental toxicology and chemistry 2014
Yu Yang Mengyan Li Camila Michels Hugo Moreira-Soares Pedro J J Alvarez

Nitrification is known as one of the most sensitive processes affected when activated sludge is exposed to antimicrobial silver nanoparticles (AgNPs). The impact of AgNPs and their released silver ions (Ag(+) ) on the abundance, activity, and diversity of different nitrifying bacteria in wastewater treatment plants (WWTPs), however, is poorly understood. The present study investigated the impac...

2016
Agbaje Lateef Monsurat A. Akande Sunday A. Ojo Bolaji I. Folarin Evariste B. Gueguim-Kana Lorika S. Beukes

Biosynthesis of silver nanoparticles (AgNPs) using nest extract of paper wasp (Polistes sp) was investigated in this work. The AgNPs were characterized by UV-Vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM), and evaluated for antibacterial, antifungal, dye degradation, blood anticoagulation, and blood clot dissolution (thrombolytic) ac...

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