Nano Sized Particles
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Characterisation and microleakage of a new hydrophilic fissure sealant - UltraSeal XT® hydro™
ABSTRACT Objectives The aim of this study was to characterise the new hydrophilic fissure sealant, UltraSeal XT® hydro™ (Ultradent Products, USA), and to investigate its in vitro resistance to microleakage after placement on conventionally acid etched and sequentially lased and acid etched molars. Material and Methods The sealant was characterised by
J. Appl. Oral Sci.. Publicado em: 2016-08
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2. Ni(II), Cu(II), AND Zn(II) COMPLEXES DERIVED FROM A NEW SCHIFF BASE 2-((Z)-(3-METHYLPYRIDIN-2- YLEIMINO)METHYL)PHENOL AND SYNTHESIS OF NANO SIZED METAL OXIDE PARTICLES FROM THESE COMPOUNDS
Synthesis, spectral identification, and magnetic properties of three complexes of Ni(II), Cu(II), and Zn(II) are described. All three compounds have the general formula [M(L)2(H2O)2], where L = deprotonated phenol in the Schiff base 2-((z)-(3-methylpyridin-2-yleimino)methyl)phenol. The three complexes were synthesized in a one-step synthesis and characterize
Quím. Nova. Publicado em: 2015-11
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3. On the Formation of Hydroxyapatite Nano Crystals Prepared Using Cationic Surfactant
Being a major constituent of hard tissues found in humans, synthetic hydroxyapatite (HA) as a substitute to natural bone and teeth is gaining importance. In particular, nano hydroxyapatite is expected to impart considerably superior properties. The current research focuses on identification of mechanism of the formation of HA nano-crystals during its prepara
Mat. Res.. Publicado em: 2015-06
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4. Synthesis of SAPO-34/ZSM-5 Composite and Its Catalytic Performance in the Conversion of Methanol to Hydrocarbons
SAPO-34/ZSM-5 composite was synthesized with nano-sized ZSM-5 zeolite as seeds and characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen sorption, Fourier transform infrared (FTIR) and temperature-programmed desorption of ammonia (NH3-TPD); its catalytic performance in the conversion of methanol to hydrocarbons (MTH) w
J. Braz. Chem. Soc.. Publicado em: 2015-02
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5. Comparative study of the characteristics of nano silica - , silica fume - and fly ash - incorporated cement mortars
The structural characteristics of cement mortars, impregnated with nano silica (NS), silica fume (SF) and fly ash (FA), were comparatively studied using Fourier transform infrared spectrometer (FTIR), thermogravimeter-differential thermogravimeter (TG-DTG) and scanning electron microscope (SEM). The mechanical strengths of the specimens were determined at ea
Mat. Res.. Publicado em: 09/05/2014
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6. Obtenção de nanocompósitos de alumina-zircônia para aplicação como biomaterial / Obtaining of alumina-zirconia nanocomposites for application as biomaterial
Alumina ceramic of high density and high purity are used as biomaterials due to the combination of excellent corrosion resistance, good biocompatibility, high wear resistance and moderate strength. However, their low fracture toughness limits its range of applications. One possibility to improve the properties of these materials may be in the use of nanometr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/05/2011
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7. Revestimentos a base de Ta/Al2O3 produzidos por aspersão térmica sobre substrato metálico / Ta/Al2O3 coatings produced by thermal spray on metallic substrate
Substratos metálicos de aço inox 416 foram revestidos por aspersão térmica em tocha de plasma. Eles foram posicionados a uma distância de 4 e 5 cm em relação ao bocal de saída do jato de plasma. Os materiais de partida utilizados para as deposições foram pós de óxido de tântalo e alumínio. Esses dois pós foram misturados e moídos em moinho de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/09/2010
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8. Ação de micro e nanopartículas de dióxido de titânio sobre a resposta inflamatória no intestino delgado de camundongos / Effects of micro and nano-sized titanium dioxide on the inflammatory response on small intestine in mice
Introdução: O dióxido de titânio (TiO2) é um corante encontrado na forma de partículas em diversos produtos industrializados. Muitos estudos, a maioria envolvendo o trato respiratório, alertam sobre os efeitos prejudiciais advindos da exposição ao TiO2. Embora partículas da dieta, tais como o TiO2, sejam ingeridas diariamente, ainda existem poucos
Publicado em: 2010
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9. Nano-Scaled Particles of Titanium Dioxide Convert Benign Mouse Fibrosarcoma Cells into Aggressive Tumor Cells
Nanoparticles are prevalent in both commercial and medicinal products; however, the contribution of nanomaterials to carcinogenesis remains unclear. We therefore examined the effects of nano-sized titanium dioxide (TiO2) on poorly tumorigenic and nonmetastatic QR-32 fibrosarcoma cells. We found that mice that were cotransplanted subcutaneously with QR-32 cel
American Society for Investigative Pathology.