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Search Results: 1 - 10 of 546376 matches for " A.V.; Mu？oz "
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Electrofisiología ocular Ocular electrophysiology
A.V. Sánchez Ferreiro,L. Mu？oz Bellido
Archivos de la Sociedad Espa？ola de Oftalmología , 2012,
Abstract:
Evolución histórica de las lentes de contacto Evolution and history of contact lenses
A.V. Sánchez Ferreiro,L. Mu？oz Bellido
Archivos de la Sociedad Espa？ola de Oftalmología , 2012, DOI: 10.1016/j.oftal.2012.04.009
Abstract:
Simulación en oftalmología Simulation in opthalmology
A.V. Sánchez Ferreiro,L. Mu？oz Bellido
Archivos de la Sociedad Espa？ola de Oftalmología , 2012,
Abstract:
Queratopatía cristalina en el tratamiento del pterigión: a propósito de un caso Crystalline keratopathy in pterigium treatment: Case report
A.V. Sánchez Ferreiro,A. López Criado,L. Mu？oz Bellido
Archivos de la Sociedad Espa？ola de Oftalmología , 2012,
Abstract: Caso clínico: Mujer de 65 a os que relata la aparición de una mancha blanca en el ojo izquierdo, que ha crecido en el último a o. A la exploración se observa un infiltrado intraestromal blanco, con aspecto de cristales de morfología arboriforme, con una mínima respuesta inflamatoria. Se instaura tratamiento tópico sin franca mejoría, requiriendo una queratoplastia penetrante. Discusión: La queratopatía cristalina es una manifestación poco frecuente, y característica, aunque no exclusiva, de queratitis infecciosa por Streptococcus del grupo viridans. Se ha relacionado con el uso prolongado de corticoides tópicos tras queratoplastia penetrante y suele presentar mala respuesta al tratamiento médico. Case report: A 65 year-old female who consulted due to the emergence of a white spot in the eye that had grown over the last year. The physical examination showed an intrastromal white crystal-like infiltrate and a tree-like morphology, with minimal inflammatory response. It was treated topically with no clear improvement, requiring a penetrating keratoplasty. Discussion: A crystalline keratopathy is a rare event and characteristic of, but not exclusively, to a Streptococcus viridans infectious keratitis. It has been associated with prolonged use of topical steroids after penetrating keratoplasty and usually has a poor response to treatment.
Medicina regenerativa corneal: aplicaciones en oftalmología Regenerative corneal medicine: Ophthalmology applications
A.V. Sánchez Ferreiro,G. Guerra Calleja,M. Cami？a Nú？ez,L. Mu？oz Bellido
Archivos de la Sociedad Espa？ola de Oftalmología , 2012, DOI: 10.1016/j.oftal.2012.02.007
Abstract:
Estima？？o de parametros genéticos entre pesos pré e pós-desmama na ra？a Nelore
Garnero,A.V.; Mu？oz,M.C.C.D.; Marcondes,C.R.; L？bo,R.B.; Lira,T.; Gunski,R.J.;
Archivos de Zootecnia , 2010, DOI: 10.4321/S0004-05922010000200019
Abstract: correlations among two or more traits indicate the extent to which they are associated. the level and magnitude of this association are key factors in genetic improvement because the goal is to enhance the genetic makeup of a group of traits that act simultaneously. therefore, the aim of this study was to estimate the components of variance and heritability for standard weights at 120, 240, 365, 450 and 550 days of age (p120, p240, p365, p450 and p550, respectively), and the genetic correlation among p120 and other weights in nellore cattle using a database of 29 769 records. bivariate analysis was carried out for all the traits using p120 as an anchor, and additive covariance was fixed as an analytical strategy in order to obtain genetic correlation estimates. heritability (h2) values were 0.21 for p240; 0.37 for p365; 0.36 for p450 and 0.42 for p550. the estimation of h2 varied between 0.23 and 0.31 for w120. genetic correlation estimates were high and positive, 0.96, 0.87, 0.79 and 0.76 among p120 and p240, p365, p450 and p550, respectively. these values indicate that selection for weight at younger ages will lead to a corresponding change in later weight, in the same direction.
Elucidation on Reactions Thermodynamics and Kinetics of OFC-A of Steels  [PDF]
A.V. Adedayo
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2010, DOI: 10.4236/jmmce.2010.97043
Abstract: The basic principles of Oxyfuel cutting of metals lie in rapid high-temperature oxidation of the cut metal. Considerable proportion of the published work on the subject of oxygen cutting, the details of the oxidation reaction are overlooked or confused. Most often, physical characteristics of oxidized material is attributed to that of iron rather than iron oxide. The analysis of the oxidation reactions pertinent to Oxyfuel cutting of steels has also been majorly ignored. The oxidation process of iron and steel though similar in some respects, yet, in other aspects, show significant differences. This paper presents experimental and theoretical elucidation on reactions thermodynamics and kinetics of oxyfuel cutting processes of steel. Six 10mm metallurgy steel rods of different wt% C were flame cut using different acetylene and oxygen pressures. The composition of the steel rods used ranged from 0.16 wt% C to 0.33wt% C. Acetylene pressures used ranged from 3.45 x 10-2 N.m-2 to 5.52 x 10-2N.m-2, while oxygen pressure ranged from 2.76 x 10-1N.m-2 to 3.17 x 10-1 N.m-2. The result shows that the cutting rates decreased with carbon content of the steel as a result of reduction of iron oxide during decarburization reactions. Theoretical models of the thermodynamics and kinetics of cutting process pertinent to steels are also discussed.
Development Processes of Globular Microstructure  [PDF]
A.V. Adedayo
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2011, DOI: 10.4236/jmmce.2011.107050
Abstract: Semi solid metallurgy offers distinct advantages over other near-net-shape manufacturing processes. By this process, components are produced from slurry kept at a temperature between the solidus and the liquidus isotherms, resulting in breakdown of the dendritic structure. A new structure in which the morphology of the crystals of the primary phase is globular evolves. In this present paper, the importance of globular structure is identified. The theories of evolution of globular crystals in thixo–processing are identified and discussed.
Influence of Mould Heat Storage Capacity on Properties of Grey Iron  [PDF]
A.V. Adedayo, B. Aremo
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2011, DOI: 10.4236/jmmce.2011.104028
Abstract: Grey cast iron is characterized by presence of a large portion of its carbon in the form of graphite flakes which are observable in their microstructures. Their properties are significantly dependent on the micro-constituents of the, cast iron components. A way of controlling the microstructure of cast iron is through the controlled cooling rates during solidification. To control cooling rate, the heat storage capacity of the mould is important. This paper presents the characteristic effects of graphite flake sizes on some mechanical properties of grey cast iron. Six mould materials with heat storage capacities ranging from 1.52 kJ.m-2.K-1.s-1/2 to 2.16 kJ.m-2.K-1.s-1/2 were prepared and used to cast some grey cast iron samples whose microstructures were observed by optical microscopy. Mechanical properties of the grey iron were evaluated. The results show that the properties increased with the heat storage capacity of the mould. Also, the microstructures show a dependence on heat storage capacity of the mould.
Fibras de a？o em blocos de concreto: estudo para utiliza？？o em ambiente marítimo
Migliorini, A.V.;Guimar？es, A.T.C.;Ozório, B.P.M.;
Matéria (Rio de Janeiro) , 2012, DOI: 10.1590/S1517-70762012000200006
Abstract: the present article's main objective is to study the possibility of using steel fibers in concrete to be applied under the format of blocks for the containment of marine waves, searching to influence their mechanical resistance and lifetime. based on the success of utilizing steel fibers in concrete applied in sewage, a very corrosive environment, these fibers were also considered to be applied in the marine environment. concrete might be attacked even without direct contact with sea water because of the high amount of chlorine contained in salts diluted in air. a study was made based on lifetime tests for two years with concrete blocks either containing or not chlorine in its constitution. the concrete blocks were exposed to atmospheric condition and also to a wet-dry testing procedure in the presence of nacl to enhance the penetration of chlorine ions in the samples.
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