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Now showing items 3541-3550 of 3805
UV screening clear coats based on encapsulated CeO2 hybrid latexes
(RSC, 2012-12-21)
CeO2 nanoparticles have been successfully incorporated into acrylic latex particles with an excellent homogeneous distribution (mostly one inorganic particle per polymer particle) and limited aggregation (inorganic ...
One pot stimuli-responsive linear waterborne polyurethanes via Diels-Alder reaction
(Elsevier, 2019-01-25)
Different strategies were used to obtain waterborne polyurethanes containing Diels-Alder moieties. In the first one (two pot), furan and maleimide end capped waterborne polyurethane dispersions were synthesized with the ...
Micro-Raman spectroscopic identification of natural mineral phases and their weathering products inside an abandoned zinc/lead mine
(Elsevier, 2011-01-23)
Mining activities provide a good source of minerals of different nature. On the one hand, the primary minerals for whose formation a geological time-scale is required. On the other hand, secondary minerals, formed from ...
Operating conditions for attenuating Ni/La2O3-αAl2O3 catalyst deactivation in the steam reforming of bio-oil aqueous fraction
(Elsevier, 2013-07-16)
A study was carried out on the effect of temperature (in the 500–800 °C range) and space–time (between 0.10 and 0.45 gcatalyst h(gbio-oil)− 1) on Ni/La2O3–αAl2O3 catalyst deactivation by coke deposition in the steam reforming ...
Computational Thinking in pre-university Blended Learning classrooms
(Elsevier, 2017-05-01)
This article describes the implementation of various core
elements of Computational Thinking in the classrooms of schools of Latin
America and USA in two specific courses: PC-01 and ECE130. These courses
were designed ...
Optically active multilayer films based on chitosan and an azopolymer
(2014-02-24)
The layer-by-layer technique has been widely adopted for the fabrication of nanostructures with tailored properties. In this work, photoactive multilayer films consisting of alternating layers of chitosan and an azopolymer ...
On The Influence of Rotary Dresser Geometry on Wear Evolution and Grinding Process
(MDPI, 2019-11-22)
Dressing is a critical issue for optimizing the grinding process. Dresser tool and dresser
parameters must be designed according to the grinding wheel material, shape, or even the dimensional and geometrical tolerances ...
The Effects of Bioactive Nanoparticles on the Degradaion of DLGA
(Taylor & Francis, 2014-09-11)
The effect of bioactive nanoparticles on the in vitro degradation of DLGA composite scaffolds is
investigated. Fabricated by thermally induced phase separation, the scaffolds present a high porosity
(>90%). In vitro ...
The social reputation of European companies: Does anti‐corruption disclosure affect stakeholders' perceptions?
(Wiley, 2018)
Corruption is a very important topic in society but also for businesses. However, there are few empirical studies that analyze corruption from the point of view of disclosure by companies and none that analyze its effect ...
The MIT bag model as an infinite mass limit
(École polytechnique, 2019)
The Dirac operator, acting in three dimensions, is considered. Assuming that a
large mass m > 0 lies outside a smooth enough and bounded open set Ω ⊂ R3, it is proved that
its spectrum approximates the one of the Dirac ...