نتایج جستجو برای: iron nanoparticles

تعداد نتایج: 243102  

Journal: :Magnetic resonance in medicine 2013
Julian Haegele Sven Biederer Hanne Wojtczyk Matthias Gräser Tobias Knopp Thorsten M Buzug Jörg Barkhausen Florian M Vogt

Magnetic particle imaging has emerged as a new technique for the visualization and quantification of superparamagnetic iron oxide nanoparticles. It seems to be a very promising application for cardiovascular interventional radiology. A prerequisite for interventions is the artifact-free visualization of the required instruments and implants. Various commercially available catheters, guide wires...

Journal: :Journal of aerosol medicine and pulmonary drug delivery 2008
Andrew R Martin Richard B Thompson Warren H Finlay

Superparamagnetic iron oxide nanoparticles show potential in magnetic targeting of inhaled aerosols to localized sites within the lung. These particles are also used as contrast agents in magnetic resonance imaging (MRI). In the present work, we examine the feasibility of measuring regional lung deposition of iron oxide nanoparticles using MRI. Mice were exposed nose-only to nebulized superpara...

Journal: :international journal of bio-inorganic hybrid nanomaterials 0

iron oxide (fe2o3) nanoparticles were synthesized by a simple approach using sodium borohydride (nabh4) and iron chloride hexahydrate (fecl3.6h2o). their physicochemical properties were characterized by high resolution transmission electron microscopy (hrtem), scanning electron microscopy (sem), x-ray diffraction (xrd) and electron dispersive spectroscopy (eds). xrd pattern showed that the iron...

Ali Akbar Rostami, Homa Mohseni Kouchesfehani, Rahman Fakheri, Sahar Kiani,

Background: Despite the wide range of applications, there is a serious lack of information on the impact of the nanoparticles on human health and the environment. The present study was done to determine the range of dangerous concentrations of iron oxide nanoparticle and their effects on mouse embryonic stem cells. Methods: Iron oxide nanoparticles with less than 20 nanometers diameter were en...

Journal: :Journal of Nanobiotechnology 2006
Darryl N Williams Sheryl H Ehrman Tracey R Pulliam Holoman

In order to enhance the utilization of inorganic nanoparticles in biological systems, it is important to develop a fundamental understanding of the influence they have on cellular health and function. Experiments were conducted to test silica, silica/iron oxide, and gold nanoparticles for their effects on the growth and activity of Escherichia coli (E. coli). Transmission electron microscopy (T...

2017
Mounil Mankad Ranbir Singh Fougat Armi Patel Pooja Mankad Ghanshyam Patil

Metallic nanoparticles have huge applications in all the fields including agriculture and its allied sciences. This study aims at evaluating possible implications of iron oxide nanoparticles on the growth and development of rice (Oryza sativa L.). Rice is feeding hunger of half of the World’s population and yet found to be highly sensitive towards iron deficiency especially at seedling stage. T...

2007
Vaishnavi Sarathy James T. Nurmi Paul G. Tratnyek James E. Amonette Donald R. Baer Chan Lan Chun

Introduction The current interest in iron/iron oxide nanoparticles for remediation applications can be partly attributed to their presumed ease of injection and faster reactivity. However, several processes can limit their effectiveness for degrading contaminants in groundwater include aging, aggregation and deposition. Under environmental conditions, nanoparticles with Fe(0) cores persist beca...

Journal: :Magnetic resonance in medicine 2012
Steven S Harris Hui Mao Xiaoping P Hu

Superparamagnetic iron oxide nanoparticles produce changes in the surrounding microscopic magnetic field. A method for generating contrast based on the application of an adiabatic preparation pulse and the failure of the adiabatic condition surrounding the nanoparticles is introduced in this article. Images were obtained in the presence and absence of an adiabatic preparation pulse and the diff...

F. Khayat Sarkar Z. Khayat Sarkar

In this study, magnetic iron oxide nanoparticles (Fe3O4) with the size range of 20-30 nm were prepared by the modified controlled chemical co-precipitation method from the solution of ferrous/ferric mixed salt-solution in alkaline medium. In this process polyethylene glycol was used as a surfactant to prevent the solution from agglomeration. The prepared magnetic nanoparticles were characterize...

Objective(s): Nowadays, examining the toxicity of nanoparticles including the synthesized and functionalized iron nanoparticles using methods like green synthesis is highly considered, due to their increasing usage in various fields of medicine, biology, industrial, and pollution removal. Hence, in this study, the toxicity of the zero valent iron nanoparticles synthesized by plant-Myrtus commun...

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