The present paper reports the use of an amphoteric copolymer, poly(diallylamine-co-maleic acid) (PDAMA), as a component of precursor layers (or sacrificial layers) for constructing free-standing layer-by-layer (LbL) films. A PDAMA-poly(styrenesulfonate) (PSS) film or PDAMA-poly(dimethyldiallylammonium chloride) (PDDA) film was coated on the surface of a quartz slide at pH 4.0 or 8.0, respective...

background: electrocoagulation is a technique involving the electrolytic addition of coagulating metal ions directly from sacrificial electrodes. these ions coagulate with turbidity agents in the water, in a similar manner to the addition of coagulating chemicals such as alum and ferric chloride, and allow the easier removal of the pollutants. purpose of this study was to conduct experimental i...

Glycerol mono-oleate (GMO) was produced by direct esterification reaction with amberlyst 16 resin catalysts with the efficiency of 86% and was used as a surfactant for synthesis of CoFe2O4 nano-particles by surfactant-assisted microwave method. Fourier transform infrared spectroscopy (FT-IR), X-Ray diffraction (XRD) and scanning electron microscopy (SEM) were used to consider the structural and...

In the present study, gold/surfactant core/shell colloidal nanoparticles with a controlled morphology and chemical composition have been obtained via the so-called sacrificial anode technique, carried out in galvanostatic mode. As synthesized Au-NPs had an average core diameter comprised between 4 and 8 nm, as a function of the electrochemical process experimental conditions. The UVVis characte...

Porque é que os estudos prisionais não explicam fenómenos notórios como a violência institucional nos lugares com mais segurança do mundo, muito diferente criminalização dos sexos e das classes sociais, as intenções declaradas incumpridas pelos estados de respeito direitos humanos? que, este respeito, dominam preconceitos ideológicos? As penas penitenciárias são modernos, par trabalho assalaria...

The utilization of sacrificial layers to strengthen civilian structures against terrorist attacks is great interest engineering experts in structural retrofitting. cladding are designed be attached the façade absorb impact explosion through facing plate and core layer progressive plastic deformation. Therefore, blast load striking non-sacrificial structure could attenuated. idea this study cons...