نتایج جستجو برای: gold nanoparticles gnps

تعداد نتایج: 178038  

Journal: :Clinical and investigative medicine. Medecine clinique et experimentale 2008
Xiaojing Zhang James Z Xing Jie Chen Lawrence Ko John Amanie Sunil Gulavita Nadeem Pervez Don Yee Ronald Moore Wilson Roa

PURPOSE Nanotechnology is an emerging field with significant translational potential in medicine. In this study, we applied gold nanoparticles (GNP) to enhance radiation sensitivity and growth inhibition in radiation-resistant human prostate cancer cells. METHODS Gold nanoparticles (GNPs) were synthesized using HAuCl4 as the gold particle source and NaBH4 as the reductant. Either thio-glucose...

2007
Biswarup Saha Jaydeep Bhattacharya Ananda Mukherjee AnupKumar Ghosh ChittaRanjan Santra Anjan K Dasgupta Parimal Karmakar

Bactericidal efficacy of gold nanoparticles conjugated with ampicillin, streptomycin and kanamycin were evaluated. Gold nanoparticles (Gnps) were conjugated with the antibiotics during the synthesis of nanoparticles utilizing the combined reducing property of antibiotics and sodium borohydride. The conjugation of nanoparticles was confirmed by dynamic light scattering (DLS) and electron microsc...

Journal: :international journal of molecular and cellular medicine 0
sayyed hossein mousavie anijdan department of medical physics, babol university of medical sciences, babol, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (babol university of medical sciences) seied rabi mahdavi department of medical physics and engineering, school of medicine, tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) alireza shirazi department of medical physics and engineering, school of medicine, tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) mohammad ali zarrinfard department of medical nanotechnology, faculty of advanced medical sciences, tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) jamshid hajati department of immunology, faculty of medicine, tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences)

one of the applications of gold nanoparticles (gnps) in medicine is radiation dose-enhancing effect. although there are many simulations, in vitro and in vivo evidence that gnps can enhance significantly the radiation dose effect of orthovoltage beams. these beams compared with megavoltage (mv) beams, have limited applications in radiotherapy. in order to evaluate gnps radiosensitization perfor...

Journal: :jundishapur journal of natural pharmaceutical products 0
zahra arab-bafrani disorder metabolic research center, faculty of medicine, golestan university of medical sciences, gorgan, ir iran; department of medical physics, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, ir iran alihossein saberi department of medical genetics, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of medical genetics, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel: +98-9161133488, fax: +98-613332036 mohammad javad tahmasebi birgani department of medical physics, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, ir iran daryoush shahbazi-gahrouei department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, ir iran mahdi abbasian department of biotechnology, college of agriculture, isfahan university of technology, isfahan, ir iran mehrafarin fesharaki department of cell sciences research center medical science, school of medicine, isfahan university of medical sciences, isfahan, ir iran

conclusions due to the significant reduction in the mean inactivation dose of colon cancer cells in the presence of gold nanoparticles, it seems that gnps are suitable options to achieve a new approach in order to improve radiotherapy efficiency without increasing the prescribed radiation dose. results cell survival in the presence of gnps was more than 90% and the maximum uptake of gnps was ob...

Journal: :nanomedicine journal 0
elnaz shaabani department of medical nanotechnology, school of advanced technologies in medicine (satim), tehran university of medical sciences (tums), tehran, iran seyed mohammad amini department of medical nanotechnology, school of advanced technologies in medicine (satim), tehran university of medical sciences (tums), tehran, iran sharmin kharrazi department of medical nanotechnology, school of advanced technologies in medicine (satim), tehran university of medical sciences (tums), tehran, iran roksana tajerian department of tissue engineering and applied cell sciences, school of advanced technologies in medicine (satim), tehran university of medical sciences (tums), tehran, iran

objective(s): biological applications of gold nanoparticles have limitations because of the toxic chemicals used in their synthesis. curcumin can be used as reducing as well as capping agent in synthesis of gnps to eliminate the cytotoxicity. conjugation of curcumin to gold also helps in increasing its solubility and bioavailability. materials and methods: here we report synthesis of gold nanop...

2017
Surekha Kundu

The synthesis and biomedical application of noble metal nanoparticles specially gold nanoparticles (GNPs) is a promising field of research and has garnered the attention of vast groups of researchers. Bulk metallic gold (Au) is known to be chemically inert. However, when the size of gold is reduced to nanometer ranges it starts to show diverse biological properties [1]. GNPs find application in...

2017
Majid Arvand Akram Pourhabib Masoud Giahi

Nowadays, modified electrodes with metal nanoparticles have appeared as an alternative for the electroanalysis of various compounds. In this study, gold nanoparticles (GNPs) were chosen as interesting metal nanoparticles for modifying of carbon paste electrode (CPE). GNPs and the gold nanoparticles-modified carbon paste electrode (GNPs/CPE) were characterized by UV-Vis spectroscopy, transmissio...

2012
Guandong Zhang Jacek B Jasinski Justin Lee Howell Dhruvinkumar Patel Dennis P Stephens Andre M Gobin

In the quest for producing an effective clinically relevant therapeutic agent, scalability, repeatability, and stability are paramount. In this paper, gold nanoparticles (GNPs) with precisely controlled near infrared (NIR) absorption are synthesized by a single step reaction of HAuCl4 and Na2S2O3, without assistance of additional templates, capping reagents or seeds. The anisotropy in the shape...

2015
J. Anuradha Tasneem Abbasi S.A. Abbasi

A biomimetic method of gold nanoparticles synthesis utilizing the highly invasive aquatic weed pistia (Pistia stratiotes) is presented. In an attempt to utilize the entire plant, the efficacy of the extracts of all its parts - aerial and submerged - was explored with different proportions of gold (III) solution in generating gold nanoparticles (GNPs). The progress of the synthesis, which occurr...

2012
Rashmi Sanghi Preeti Verma

An efficient, simple and environment friendly biosynthesis of gold nanoparticles (GNPs), mediated by fungal proteins of Coriolus versicolor is reported. By altering the reaction conditions, the intracellular synthesis of GNPs on the fungal mycelium, could be well tailored to produce extracellular GNPs in the aqueous medium. The reaction rate and the morphology of the particles were found to dep...

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