Vitreous System
Mostrando 1-12 de 41 artigos, teses e dissertações.
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1. Morphology Behavior of Copper Films Deposited after Wet Surface Treatment on Polished Alumina
In this paper, a pre-treatment process for electroless copper (Cu) deposition on the polished alumina (Al2O3) 99.9% and the behavior of Cu plating by electroless process after Al2O3 surface treatment were explored. Our work was carried out by changing the roughness of Al2O3 through micro-etching (coarsening), nucleation its surface by a two-step method (sens
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Metacercariae of Austrodiplostomum spp. (Digenea: Diplostomidae) infecting the eyes and brains of fish in Brazilian Amazon
RESUMO: O objetivo deste trabalho foi relatar a ocorrência de Austrodiplostomum spp. nos olhos e cérebros de Acaronia nassa, Caquetaia spectabilis, Satanoperca acuticeps, Curimatella sp. e Crenicichla marmorata em um lago do rio Amazonas no estado do Pará (Brasil). Dos 49 peixes examinados, 10,2% foram parasitados por metacercárias de Austrodiplostomum s
Arq. Inst. Biol.. Publicado em: 21/10/2019
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3. Intravitreal injection of the synthetic peptide LyeTx I b, derived from a spider toxin, into the rabbit eye is safe and prevents neovascularization in a chorioallantoic membrane model
Abstract Background: The great diversity of molecules found in spider venoms include amino acids, polyamines, proteins and peptides, among others. Some of these compounds can interact with different neuronal receptors and ion channels including those present in the ocular system. To study potential toxicity and safety of intravitreal injection in rabbits of
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 17/12/2018
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4. Efecto electrocatalítico de nanopartículas bimetálicas de Ag y Cd hacia la reducción de iones nitrato y/o nitrito
ABSTRACT The electrocatalytic effect of Cd-Ag bimetallic nanoparticles supported on highly oriented pyrolytic graphite (HOPG) and vitreous carbon (VC) substrates was evaluated for the nitrate and/or nitrite ions reduction reaction. For this, in a first stage, the metallic and bimetallic deposits were obtained on the carbonaceous substrates (CS) using the ele
Matéria (Rio J.). Publicado em: 19/07/2018
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5. Crystallization of Anatase TiO2 in Niobium Potassium Phosphate Glasses
In this work, the glass forming ability was studied in potassium phosphate glasses with increasing amounts of TiO2 in order to obtain a glass-ceramic with photocatalytic properties. The first studied series has been the binary system (100-x) KPO3-xTiO2. Homogeneous and transparent glasses could be obtained with x varying from 10 to 30 mole%. Since the photoc
Mat. Res.. Publicado em: 16/02/2017
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6. Experimental closed system surgical procedures and intraocular pressure fluctuation
PURPOSE: To determine the behavior of intraocular pressure and its relationship with infusion pressure in vitrectomy, phacofragmentation and phacoemulsification surgeries in rabbits.METHODS:Intraocular pressure fluctuation was measured in 24 eyes of 12 rabbits submitted to vitrectomy, phacofragmentation and phacoemulsification procedures (eight eyes per grou
Acta Cir. Bras.. Publicado em: 2014-11
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7. Estudo das propriedades microestruturais e ópticas do sistema BaO-BaF2-B2O3 / Study of microstructural and optical properties of the system BaO-BaF2-B2O3
Este trabalho teve por objetivo o estudo do sistema vítreo BaO-B2O3-BaF2 e das fases obtidas a partir do processo de cristalização controlada do mesmo, em busca da obtenção da fase β-BaB2O4. Foram estudadas amostras contendo entre 0% e 40% de fluoreto de Bário. A avaliação das propriedades microestruturais e ópticas foram realizadas através da
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2011
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8. Desenvolvimento, caracterizacao e aplicacao da matriz FTO/POLI(3-aminofenol) na deteccao de marcador de lesao cardiaca por fotoluminescencia de quantum dots
The heart is a vital organ propelling blood, that carries oxygen and nutrients throughout the body, but whenever these components do not reach it due to arterial obstruction, there is an electrical instability in the process of contraction of the muscle, causing arrhythmias that often, in less than an hour, causes acute myocardial infarction. The problem and
Publicado em: 2011
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9. Estudo de parâmetros espectroscópicos de íons de Nd3+ no sistema vítreo SNAB (SiO2 Na2CO3 Al2O3 B2O3) nanoestruturado com nanocristais de CdS
In this work, experimental evidences have been observed for energy transfer from CdS nanocrystals, synthesized by the fusion method, to Nd3+ ions embedded in vitreous substrates (SNAB: SiO2 Na2O Al2O3 B2O3). These dot samples doped with neodymium have been investigated by combined optical absorption (OA), photoluminescence (PL), and time-resolved photolumine
Publicado em: 2010
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10. Investigação da ordem local de nanocolóides magnéticos por espalhamento em baixo ângulo
In this work, we investigate using small angle scattering measurements the colloidal stability and the local order (typically between 10 nm and 100 nm) of magnetic nanocoloides, made of solution of magnetic ferrite nanospheres and mixed systems of magnetic nanospheres and laponite nanoplatelets. The balance of interparticles interactions has been quantitativ
Publicado em: 2009
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11. Polimerização via radical livre fotoiniciada de sistemas multicomponentes para utilização em dispositivos oftalmicos : aspectos opticos e mecanicos / Free radical polymerization photoinitiated of multicomponent systems for us e in ophthalmic devices : optical and mechanical aspects
The current market calls for materials presenting good optical properties which satisfy consumers and users in general and that can be easily handled and processed. Generally, a polymer must present good optical properties, impact resistance and hardness - all compatible in their use as ophthalmic lenses. For quite a long period of time, ophthalmic lenses ma
Publicado em: 2009
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12. Filmes de diamante nanocristalino infiltrados em substratos de silício poroso através das técnicas CVD/CVI / Nanocrystalline diamond films infiltrates in porous silicon substrate by CVD/CVI Processes
The growth of nanocrystalline diamond films (NCD) on porous silicon (PS) substrate was studied using high resolution scanning electron microscopy, high resolution X-ray diffraction, X-ray photoelectron spectroscopy and Raman scattering spectroscopy. The NCD/PS films resulted in a composite material, with great potential for electrochemical application, mainl
Publicado em: 2009