The 10μm silicate emission feature and the continuum emission from near infrared to millimeter of the dust in the disk of β Pictoris may be derived by assuming that the dust is continually replenished by comets orbiting close to the star. The basic, initial dust shed by the comets is taken to be the fluffy aggregates of interstellar silicate core-organic refractory mantle dust grains (with an a...

The construction of the future is moving in direction environmentally friendly materials and use various types industrial byproducts wastes. blast furnace slag (BFS) for production concrete one those alternatives. In this study, pastes concretes based on high-MgO BFS were alkali activated with 10% by weight sodium carbonate, silicate, a combination both. Heat treatment laboratory curing applied...

Plasma electrolytic oxidation (PEO) is a potential technique to coat a dense ceramic oxide layer on the surface of light metals, e.g. Al, Mg or Ti. In our PEO process, Al-pieces are emerged in aqueous solutions containing dissolved silicate/alkali, e.g. KOH/NaOH and K 2 SiO 3 /Na 2 SiO 3. Using a DC-pulsed system with 20Hz, micro-arcs are induced at the surface of the pieces randomly and plasma...

In this work, the role of shock-wave (SW)-induced increase of bone morphogenetic proteins (BMPs) in modulating the osteogenic properties of osteoblast-like cells seeded on a bioactive scaffold was investigated using gremlin as a BMP antagonist. Bone-like glass-ceramic scaffolds, based on a silicate experimental bioactive glass (CEL2) developed at the Politecnico di Torino, were produced by the ...

[1] Since their discovery, Martian pedestal craters have been interpreted as remnants of layers that were once regionally extensive but have since been mostly removed. Pedestals span from subkilometer to hundreds of kilometers, but their thickness is less than ∼500 m. Except for a small equatorial concentration in the Medusae Fossae Formation, the nearly exclusive occurrence of pedestal craters...

Many types of healing agents have been investigated. These agents are processed in different ways, such as adhesive polymer in capsules or hollow fibre glasses, bacteria in porous aggregates and geo-materials directly incorporated in the cementbased materials. In this study, sodium silicate powder is encapsulated in polystyrene particles (polystyrene particle containing sodium silicate is defin...

The primary objective of this paper was to synthesize a porous calcium silicate hydrate (CSH) with enhanced phosphate recovery property using polyethyleneglycol (PEG) as pore-generation agent. The formation mechanism of porous CSH was proposed. PEG molecules were inserted into the void region of oxygen-silicon tetrahedron chains and the layers of CSH. A steric hindrance layer was generated to p...

An all-aqueous sol-gel method for encapsulation of bacterial cells in porous silicate matrices towards the development of a biosensor is described. The sol-gel encapsulation of cells is achieved at room temperature and neutral pH. Furthermore, use of sodium silicate as precursor avoids generation of alcohol that can be detrimental to cells in contrast to the traditional alkoxide sol-gel encapsu...