In this work, we present Grand Canonical Monte-Carlo simulation results for the adsorption of carbon vapour in the pores of various zeolites: AlPO4-5, silicalite and faujasite (in its siliceous form). The carbon-carbon interactions are described within the frame of a Tight Binding approach (fourth momentum’s method) while the carbon-zeolite interactions are modelled using a PN-TrAZ physisorptio...

Well-preserved siliceous plates representing multiple species of euglyphids are described from a Middle Eocene maar lake deposit located near the Arctic Circle in northern Canada. Siliceous plate morphotypes including scutiform, rectangular, hexagonal, oval and circular body forms, six apertural plate types containing from five to thirteen teeth and spine plates, are documented. Many plate type...

Attention has recently been drawn to the similarity between the histological picture of silicious granuloma and tuberculosis of proliferative type in the Fallopian tube of man (Roberts, 1947). In the differential diagnosis emphasis has been placed on the value of the polarizing microscope. The purpose of the present paper is to draw attention to the presence of doubly refractile, but non-silici...

Agriculture alters the biogeochemical cycling of nutrients such as nitrogen (N), phosphorus (P), and silicon (Si) which contributes to stoichiometric imbalance among these in aquatic systems. Limitation Si relative N P can facilitate growth non-siliceous, potentially harmful, algal taxa has severe environmental economic impacts. Planting winter cover crops retain on landscape, yet their effect ...

The cement industry is facing the challenge of a lack supplementary cementitious materials substituting clinker. This applies primarily to granulated blast furnace slag, most commonly used as main component cements, due changes in metallurgical industry, and siliceous fly ash abandonment fossil fuels world. A potential new common cements may be calcined marls, which are available large quantiti...

The silicate oligomerization reaction is key to sol-gel chemistry and zeolite synthesis. Numerous experimental and theoretical studies have been devoted to investigating the physical chemistry of silicate oligomers in the prenucleation stage of siliceous zeolite formation. Most of the previous quantum chemical computational work has used gas phase models or continuous solvent models for silica ...

Siliceous scaling potential of geothermal brines has long been an obstacle to the efficient energy recovery from some geothermal resources. In classical flash geosteam plant the brine for disposal was separated at high enough temperature in order to avoid ((silica oversaturation)) which might lead to scaling on hiher cooling for additional power generation through heat recovery. Recent years bi...