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Granulometric and chemical composition of the ash-and-slag wastes (ASW) of fuel-bed firing of the brown coal from the Kangalas field of the Lena basin was investigated. The ash-and-slag material was separated by means of magnetic separation of the granulometric and hydrodynamic classification. The content of rare elements (RE) and rare-earth elements (REE) in the initial ash-and-slag and in separation products differing in particle size, density and magnetic properties was determined. It was shown that RE and REE content of the low-density products of hydrodynamic separation increases, while it decreases in the magnetic products. Manganese is also observed to get concentrated in the latter. In view of the low content of RE and REE in low-density products in comparison with the matter from ore deposits, it is concluded that the isolation of the metals from the investigated ASW is unreasonable. It was shown that the use of the investigated ASW in construction industry is promising; the compositions for obtaining nonfired bricks and building mortars of the grade strength were chosen.

The effect of humic substances on bioconversion of glucose into ethanol is investigated. It is established that their presence in the reaction mixture with the optimal concentration of 0.001 % accelerates fermentation process. The reaction of glucose fermentation can be recommended for use as a new rapid and economic test for the biological activity of various humic preparations and optimization of their concentrations in aqueous solutions, which can be used, for stimulation of the growth of microorganisms, plants, and animals.

The possibility to use self-propagating high-temperature synthesis (SHS) for obtaining stable icosahedral quasi-crystals in the system 65 at. % Al + 20 at. % Cu + 15 at. % Fe was established as a result of X-ray and electron microscopy investigations, both for a mixture of the initial metal powder mixture and after their mechanical activation for a short time. Icosahedral quasi-crystals formed during SHS are shaped as pentagonal dodecahedrons 2

Results of the extraction of humic acids (HA) from the oxidized brown coal of the Gusinoye Ozero deposit with the help of the solutions of sodium, potassium and ammonium hydroxides are presented.
A comparison of the yields of HA for different ratios of an alkaline solution to coal and duration of ultrasonic treatment (sonication) of alkaline humate-containing extracts or without ultrasonic treatment (settling) is carried out. The amounts of acidic functional groups (phenol and carboxyl) in HA and in the initial oxidized coal are determined.

A comparative investigation of the nature of substances adsorbed on the surface of continental atmospheric aerosol particles sampled in the industrial and background regions of the Novosibirsk District and Yamal-Nenets Region, as well as the marine atmospheric aerosol sampled in the region of the White Sea is carried out by means of secondary ion mass spectrometry.

Using WATEQ4F computer code, chemical speciations of coexistence of heavy metals in superficial waters of the Novosibirsk reservoir have been calculated. Although the code allows one to calculate only complexes of metals with inorganic ligands, conclusions of a general character have been drawn on the bioavailability and potential ecological danger of particular chemical speciations of metals in a specific water body. Based on the large evidence of long-term monitoring studies, enrichment of living matter, particularly the plankton, by certain metals has been revealed, the metals being available in the water of the Novosibirsk reservoir in the most mobile and consequently the most available forms, namely, free non-complex ions and hydroxo and carbonate complexes. Peculiar features of microelemental composition of the plankton of the Novosibirsk reservoir as compared to that of the bottom silt are its enrichment by P, Br, Cd, Ca, Zn, Cu, and by Pb to a lesser degree. By and large, the revealed low values of enrichment factors (10

Solid solutions on the basis of strontium cerate that was doped with yttrium or gadolinium (SrCe0.95Y0.05O3 

Petroleum samples from two holes of the Verkhne-Salatskoye deposit (the holes Nos. 118 and 122) have been studied. It has been found that they differ essentially both in their content of pitchy and aromatic components and in the composition of paraffin-naphthene hydrocarbons, which defines the features of their deposit formation. Accordingly, the process of sludge formation for a petroleum sample from the hole No. 122 that is characterized by a higher than usual content of pitchy components starts at a temperature of 50 oC. The process of deposit formation for a petroleum sample from the hole No. 118 occurs at 70 oC.
A decrease in the temperature of a petroleum flow leads to the predominantly dendritic type crystallization of paraffin hydrocarbons and to an increase in the structural amorphism of the petroleum deposit.

Sorption of selenium (IV) ions from the solutions of sodium selenite on natural zeolite-containing tuff from the Kholinskoye deposit (Transbaikalia) and on the tuff form modified with protein hydrolysate is investigated. Optimal conditions for tuff modification with protein hydrolysate are chosen. The zone of the safe action of selenium-containing tuff is determined using the test culture Tetrachimena pyriformis.

Methods of UV and IR spectroscopy,