Highly selective uptake of carbon dioxide on the zeolite |Na10.2KCs0.8|-LTA- a possible sorbent for biogas upgrading.

The|Na10.2KCs0.8|8[Al12Si12O48]8(Fm3[combining macron]c)-LTA zeolite adsorbs CO2-over-CH4 with a high selectivity (over 1500). The uptake of carbon dioxide is also high (3.31 mmol g(-1), 293 K, 101 kPa). This form of zeolite A is a very promising adsorbent for applications such as biogas upgrading, where keeping the adsorption of methane to a minimum is crucial.

Adaptogenic activity of a complex biomedication based on a northern renewable raw material.

INTRODUCTION: One of the methods of increasing bioavailability, and thus the therapeutic effectiveness of an active substances, along with decreasing its required dosage, is to generate highly effective "carrier: active substances" complexes where the active carrier both increases the bioavailability of the active substance at lower doses and has a detoxifying activity. THE AIM: the aim of this work was study the properties of the carrier from the lichen thallome in both its solid pharmaceutical form and in combination with Rhodiola rosea. MATERIALS AND METHODS: the physiologically active plant extracts with enhanced adaptogenic pharmacological activity based on plant substances growing in Yakutia: Cladonia lichen thalli and Rhodiola rosea (Rhodiolarosea, fam.Crassulaceae) rhizomes, combined in a raw material dry-weight ratio of 10:1 We used a one step, solvent-free process, involving the use of mechanochemical ball mills relying on centrifugal acceleration of the 10-30 g grinding bodies. RESULTS: A single-stage mechanochemical technology has been developed for obtaining highly effective solid-phase biocomplexes based on a"multipurpose active filler" - a polymer matrix of lichen ß-oligosaccharides. It has been shown that lichen, is a raw material from which can be sourced a filler with a strong adsorption activity for solid pharmaceutical forms. CONCLUSIONS: It is considered statistically significant that a bicomponent plant mechanocomplex based on this filler - lichen ß-oligosaccharides and small amounts of Rhodiola rosea has a wide spectrum of adaptogenic action, increasing the resistance of laboratory animals to the effects of physical exercise and a variety of extreme factors.

Strong hierarchically porous monoliths by pulsed current processing of zeolite powder assemblies.

Binderless hierarchically porous monoliths have been produced from silicalite-1 and ZSM-5 zeolite powders by a rapid and facile powder processing method where the zeolite powders are assembled in a graphite die and subjected simultaneously to a compressive pressure and a pulsed current. Pulsed current processing (PCP) or, as it is commonly called, spark plasma sintering, enables rapid thermal processing of zeolite powder assemblies with heating and cooling rates at 100 degrees C/minute or more, which results in the formation of strong powder bodies without any addition of secondary binders. Nitrogen adsorption measurements show that it is possible to form strong zeolite monoliths by PCP that maintain between 85 and 95% of the surface area of the as-received silicalite-1 and ZSM-5 powders. Line-broadening analysis of X-ray powder diffraction data by the Rietveld method and high-resolution electron microscopy showed that the formation of strong interparticle bonds is associated with a local amorphization reaction at the interfacial contact points between the zeolite particles. The PCP-treated binderless ZSM-5 monoliths display a high selectivity in xylene isomer separation.

Colloidal aspects relating to direct incorporation of TiO2 nanoparticles into mesoporous spheres by an aerosol-assisted process.

Titania nanoparticles have been incorporated into spherical mesoporous silica powders by an aerosol-assisted synthesis process from both aqueous and ethanol-based precursor dispersions. Transmission electron microscopy (TEM) showed that the titania nanoparticles exist as single particles or small aggregates within the mesoporous carrier particles and analysis of the nitrogen adsorption isotherms proved that the pore blocking of the particles is small. Particle size and zeta potential measurements showed that the addition of tetraethoxysiloxane (TEOS), and also hexadecyl trimethyl ammonium bromide (C16TAB) induced flocculation of the TiO2 nanoparticles. The higher yield and narrower size distribution of the composite powder produced from ethanol-based dispersions compared to the aqueous dispersions could be related to a smaller degree of aggregation, indicated by rheological measurements.