نتایج جستجو برای: gamma alumina nanoparticles

تعداد نتایج: 239719  

Journal: :Acta Crystallographica Section A Foundations of Crystallography 1996

Journal: :Chemosphere 2010
N Musee P J Oberholster L Sikhwivhilu A-M Botha

Increasing uses of engineered nanoparticles (ENPs) in commercial products and industrial applications has eventually resulted to their releases into atmospheric, terrestrial, and aquatic environments. However, knowledge gaps in ENPs toxicity, fate, and behaviour currently limit our ability to quantify risk assessment of materials with nanoscale dimensions, and therefore, the extent of the resul...

Journal: :iranian journal of cancer prevention 0
mostafa rezaei-tavirani elham dolat hadi hasanzadeh samaneh-sadat seyyedi vahid semnani sara sobhi

abstract background: radiosensitizer drugs are used to enhance the efficiency of radiotherapy. some nanoparticles can be considered as radiosensitizers, because they enhance cytotoxicity due to oxidative stress and increase free radical yield, especially ros , within cells resulting to cell death. methods: in this study, synergistic effect of tio 2 nanoparticles was evaluated in presence of 60 ...

2012
Eric Marceau

Aluminium oxide (Al2O3), commonly known as alumina, is a widespread naturally occurring compound that has a broad range of industrial applications. Besides its use as a pigment or abrasive, alumina also plays a vital role as catalyst support for desulfurization or hydrogenation reactions. In the latter case, the active phase on the catalyst often consists of nickel metal nanoparticles. The inte...

2006
Ilsoon Lee

Nanometer-sized functional particles are attractive for optical, electrical, magnetic, and biological applications. Recently, in addition to size, the shape of a nanoparticle was reported to be crucial, for example, to how it interacts with light, as presented by Halas and co-workers. They found that riceshaped nanoparticles made of gold and iron oxide are the most sensitive surface plasmon res...

2013
Won-Suk Chang Jin-Won Park Vijay Rawat Timothy D. Sands Gil U. Lee Timothy Sands Gil U Lee

A means for synthesizing paramagnetic nanoparticles composed of an Au–Fe alloy is described using pulsed laser deposition (PLD) of the alloy into a mesoporous alumina membrane template. Nanoparticles 46 ± 13 nm in diameter and composed of a 17% Fe alloy have been created by depositing a 35% Fe alloy into a template with 65 nm diameter pores. These paramagnetic nanoparticles had a saturation mag...

2014
Gloria Lourdes Dimas-Rivera Javier Rivera de la Rosa Carlos J. Lucio-Ortiz José Antonio De los Reyes Heredia Virgilio González González Tomás Hernández

In this work, the desorption of furfural, which is a competitive intermediate during the production of biofuel and valuable aromatic compounds, was studied using pure alumina, as well as alumina impregnated with iron and platinum oxides both individually and in combination, using thermogravimetric analysis (TGA). The bimetallic sample exhibited the lowest desorption percentage for furfural. Hig...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1389

in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...

2013
Sanjay Thorat Alberto Diaspro Alice Scarpellini Mauro Povia Marco Salerno

Three different routes were used to infiltrate the pores of anodic porous alumina templates with silver nanoparticles, selected as an example of a bioactive agent. The three methods present a continuous grading from more physical to more chemical character, starting from ex situ filling of the pores with pre-existing particles, moving on to in situ formation of particles in the pores by bare ca...

Journal: :Journal of colloid and interface science 2016
Chang Liu Hyeonseok Lee Ya-Huei Chang Shien-Ping Feng

Nanofluids are liquids containing suspensions of solid nanoparticles and have attracted considerable attention because they undergo substantial mass transfer and have many potential applications in energy technologies. Most studies on nanofluids have used low-ionic-strength solutions, such as water and ethanol. However, very few studies have used high-ionic-strength solutions because the aggreg...

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