Navegação por Assunto "Oxidação"
Resultados 21-40 de 58
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Estudo de acoplamento de luz a sistemas multicamadas : plasmons de superfícies e guias de onda
(2005) [Tese]O acoplamento de radiação óptica em sistemas multicamadas tem sido objeto de diversas pesquisas, não somente acadêmicas, mas também para aplicações industriais, tanto na área de sensores ópticos, como na de processadores ... -
Estudo experimental de filmes ultrafinos de oxinitretos de silício por substituição isotópica e perfilometria com resolução subnanométrica
(1999) [Tese]Traçagem isotópica foi usada para investigar o transporte atômico durante o crescimento térmico de filmes de oxinitreto de silício em lâminas de silício previamente implantadas com íons de nitrogênio a energias muito baixas, ... -
Evaluation of direct photolysis, electrooxidation and photoelectrooxidation for rhodamine-b degradation
(2018) [Artigo de periódico]The focus of this study is to evaluate the efficiency of oxidation processes in the treatment of a solution containing Rhodamine-B (RhB) used in various industrial applications. The advanced oxidation processes of ... -
Evidence of aluminum silicate formation during chemical vapor deposition of amorphous Al/sub 2/O/sub 3/ thin films Si(100)
(1999) [Artigo de periódico]Using narrow nuclear reaction resonance profiling, aluminum profiles are obtained in ;3.5 nm Al2O3 films deposited by low temperature ~,400 °C! chemical vapor deposition on Si~100!. Narrow nuclear resonance and Auger depth ... -
Few layer reduced graphene oxide : evaluation of the best experimental conditions for easy production
(2017) [Artigo de periódico]This work aimed to produce graphene oxide with few graphene layers, a low number of defects, good conductivity and reasonable amount of oxygen, adequate for use as filler in polymeric composites. Two starting materials ... -
Filmes de SiO2 depositados e crescidos termicamente sobre SiC : caracterização físico-química e elétrica
(2013) [Dissertação]O carbeto de silício (SiC) é um semicondutor com propriedades adequadas para substituir o silício em dispositivos eletrônicos em aplicações que exijam alta potência, alta freqüência e/ou temperatura. Além disso, um filme ... -
Gemini-Phoenix infrared high-resolution abundance analysis of five giants in the bulge globular cluster NGC 6553
(2003) [Artigo de periódico]A detailed abundance analysis of 5 giants of the metal-rich bulge globular cluster NGC 6553 was carried out using high resolution infrared spectra in the H band, obtained at the Gemini-South 8m telescope. JK photometry ... -
Heterogeneous photocatalytic degradation of dyes in water/alcohol solution used by the brazilian agate industry
(2019) [Artigo de periódico]The agate dyeing industry has been commonly seen as a high-pollution industry. Dyeing wastewater treatment is considered one of the most important categories for water-pollution control, because of its intense colour and ... -
Improvement of SiO2/4H-SiC interface properties by oxidation using hydrogen peroxide
(2009) [Artigo de periódico]The effect of using H2O2 in the thermal growth process of dielectric films on n-type 4H-SiC substrates has been investigated. In comparison to conventional oxide growth using H2O, we found that the interface trap density ... -
Influencia da oxidacao nas propriedades plasticas de carvoes coqueificantes
(1992) [Resumo publicado em evento] -
Initial stages of SiC oxidation investigated by ion scattering and angle-resolved x-ray photoelectron spectroscopies
(2001) [Artigo de periódico]Initial stages of oxidation of single-crystal, Si-faced silicon carbide were investigated using ion scattering and angle-resolved x-ray photoelectron spectroscopies. The very first oxidation products are shown to be silicon ... -
Isotopic substitution of N, O, and Si in the thermal oxidation of nitrogen-deposited silicon
(1999) [Artigo de periódico]Nitrogen was deposited on the surface of Si~100! wafers by ion implantation at a very low energy (approximately 20 eV), at fluences between 1 and 1031014 cm22. The samples were thermally oxidized in dry O2 at temperatures ... -
Isotopic substitution of si during thermal growth of ultrathin silicon-oxide films on si(111) in o/sub 2/
(1999) [Artigo de periódico]The transport of Si atoms during thermal growth of silicon-oxide films on silicon in dry O2 was investigated by isotopic substitution of Si. The experiment consisted of depositing a 7.6-nm-thick epitaxial layer of 29Si on ... -
Limiting step involved in the thermal growth of silicon oxide films on silicon carbide
(2002) [Artigo de periódico]Thermal growth of silicon oxide films on silicon carbide in O2 was investigated using oxygen isotopic substitution and narrow resonance nuclear reaction profiling. This investigation was carried out in parallel with the ... -
Magnesium surface enrichment of CoFe2O4 magnetic nanoparticles immobilized with gold : reusable catalysts for green oxidation of benzyl alcohol
(2018) [Artigo de periódico]Gold nanoparticles have shown excellent activity for selective oxidation of alcohols; such catalytic systems are highly dependent on the initial activation of the substrates, which must occur on the catalyst surface in ... -
Morphological and compositional changes in the SiO/sub 2//SiC interface region induced by oxide thermal growth
(2006) [Artigo de periódico]Changes in morphology and composition of interfacial regions of thermally grown SiO2 films on SiC in dry O2 induced by reoxidations were investigated using atomic force microscopy and oxygen profiling. The gradual oxygen ... -
Nitrogen bonding, stability, and transport in AION films on Si
(2004) [Artigo de periódico]The chemical environment of N in nitrided aluminum oxide films on Si~001! was investigated by angle-resolved x-ray photoelectron spectroscopy. Two different bonding configurations were identified, namely N–Al and N–O–Al, ... -
Novas alternativas para remoção de contaminantes emergentes presentes em efluentes urbanos por processos avançados de oxidação
(2011) [Trabalho de conclusão de graduação]Resumo não disponível -
A oxidação da proteína de choque térmico HSP70 e seus efeitos sobre a modulação da ativação de macrófagos da linhagem RAW 264.7 : a relação com a sepse e a possível sinalização pela ligação ao receptor dos produtos finais de glicação avançada-RAGE
(2013) [Dissertação]A expressão da HSP70 intracelular está associada a efeitos citoprotetores contra uma variada gama de estímulos estressores, tais como processos inflamatórios, estresse oxidativo, endotoxinas bacterianas, infecções e febre. ... -
Oxidação fotocatalítica do glicerol sobre catalisadores de ZnO
(2014) [Tese]A oxidação fotocatalítica do glicerol (OFG) é uma possível alternativa para aproveitamento do excedente de glicerol proveniente do processo de produção do biodiesel, porém são poucos os registros desta reação na literatura. ...