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Mostrando ítems 131-140 de 240
Contribuição ao estudo de argamassas de emboço com aditivo incorporador de ar
(Universidade Tecnológica Federal do ParanáPato BrancoBrasilPrograma de Pós-Graduação em Engenharia CivilUTFPR, 2017-09-30)
Air-entraining additives have been widely used to improve the properties of coating mortars in the plastic and hardened state. Some of the benefits obtained with the use of mortar additive are improvements in durability, ...
Análisis a flexión en viga de hormigón, utilizando una dosificación ideal propuesta con agregados pétreos de las canteras Casa Roja y Capilla, del Municipio de Aguazul, Casanare
(Pregrado Ingeniería Civil, 2021-11-22)
Concrete is an artificial stone material that is obtained from the mixture, in certain proportions of paste and material aggregates. "To achieve the best mechanical properties, the concrete must have a stone skeleton packed ...
On-line flow injection solid phase extraction using oxidised carbon nanotubes as the substrate for cold vapour-atomic absorption determination of Hg(II) in different kinds of water
(Royal Society of Chemistry, 2014-02)
A study was carried out to investigate the concentrations of Hg(II) in different categories of water samples at ng L1 levels. The capabilities of oxidised carbon nanotubes (ox-CNTs) were studied to assess if this substrate ...
Development of a nonionic azobenzene amphiphile for remote photocontrol of a model biomembrane
(American Chemical Society, 2016-05-25)
We report the synthesis and characterization of a simple nonionic azoamphiphile, C12OazoE3OH, which behaves as an optically controlled molecule alone and in a biomembrane environment. First, Langmuir monolayer and Brewster ...
Processing of different alumina–zirconia composites by slip casting
(Elsevier, 2013-07)
Two Al2O3–ZrO2 mixture preparation routes: classical powder mixing and addition of a Zr (IV) precursor solution to a well dispersed Al2O3 suspension, were used to produce alumina (Al2O3)–zirconia (ZrO2) slip cast composites. ...
A Multitechnique Study of Structure and Dynamics of Polyfluorene Cast Films and the Influence on Their Photoluminescence
(AMER CHEMICAL SOC, 2009)
This article describes the microstructure and dynamics in the solid state of polyfluorene-based polymers, poly(9,)-dioctylfluorenyl-2,7-diyl) (PFO), a semicrystalline polymer, and poly [(9,9-dioctyl- 2,7-divinylene-fluor ...
Interaction of cationic bilayer fragments with a model oligonucleotide
(ELSEVIER SCIENCE BV, 2011)
The interaction between cationic bilayer fragments and a model oligonucleotide was investigated by differential scanning calorimetry, turbidimetry, determination of excimer to monomer ratio of 2-(10-(1-pyrene)-decanoyl)- ...