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The composition of modified monolith zeolite catalysts containing the basic components in the washcoating layer is suggested. When the washcoating layer contains 80 % zeolite, 10 % TiO₂, and 10 % Al₂O₃, the catalyst exhibits both activity and adhesion strength. The titanium catalyst is stable to sulfur poisoning (H₂S) at 500 °C; a small decrease in the catalyst activity at 400 °C is no longer observed after regeneration. Introducing 4 % mass Ce (calculated for respect to the washcoating) into the ready catalyst, one can preserve the catalyst activity and provide its stabile operation in the presence of water vapour both at 400 and 500 °C. Activity of the titanium-cerium-modified monolith catalyst is stable in the presence of water vapour and sulphur compounds in the gas mixture at a time.

Halogenated non-terpenic C₁₅-acetogenins of sea organisms make up a large group of natural compounds. Structures of more than 130 compounds are considered and data on their biological activity are presented.

The review is dedicated to a group of natural compounds of a new type

The organochlorine pesticides (OCPs) content in bottom sediments of main tributaries of the Lake Baikal was studied. Experimental data on the presence of hexachlorobenzene, DDT and its metabolites and hexachlorocyclohexane (HCH) isomers in sediments allowed estimating pathways of OCPs input to the Baikal basin.

A two-stage method of converting aromatic nitro compounds into luminophors is proposed. It includes catalytic reduction of the nitro aromatic compound by molecular hydrogen followed by the interaction of the formed aromatic amine with a fluorogenic reagent (fluorescamine, ortho-phthalaldehyde). Efficient reduction is provided by using palladium catalysts on supports with developed surface, such as barium sulphate, C₆₀ fullerene, and microcapillary glass plates. Luminescence of the final products is observed in the regions l = 490

The reaction of 2,6-di-tert-butylphenol with allyl alcohol resulting in the formation of 4-(3-hydroxypropyl)-2,6-di-tert-butylphenol is implemented on industrial scale. Condensation of the product with phthalic anhydride leads to the formation of the corresponding diphthalate, which is the final commercial product. The stability of operation at all technological stages was achieved in course of industrial practice.

The structure transformations of the wood under mechanochemical treatment in vibratory centrifugal, planetary, and ball mills are investigated by means of electron microscopy, X-ray diffraction, thermomechanical spectroscopy. Specific surface of the samples is estimated. Features of the changes in wood properties under grinding in these types of mills are established. Under wood treatment in vibratory centrifugal and planetary mills, no complete amorphization of the structure of wood matrix occurs; quite contrary, some ordering is observed.

The synthesis of bismuth (III) oxohydroxostearate through the interaction of stearic acid with bismuth-containing perchlorate or nitrate solutions is investigated by means of X-ray phase analysis, thermogravimetry, electron microscopy, IR spectroscopy and chemical analysis. The conditions for the formation of bismuth stearate of Bi₆O₄(OH)₄R₆ composition (where R is stearate anion) are determined. Reasonability of obtaining highly pure bismuth stearate from metal bismuth is demonstrated; the latter is preliminarily oxidized with oxygen of the air, the resulting Bi₂O₃ is dissolved in nitric acid (1 : 1); bismuth is purified from extrinsic metals by its precipitation in the form of oxohydroxostearate, which is formed on adding bismuth nitrate solution to sodium stearate solution at the temperature of (80

Reactions of CdX (X = Br, I) with MBH₄ (M = Li, Na, K) under mechanical activation (MA) of the mixtures of crystalline compounds in vacuum vibratory mill are investigated. It is discovered that the reactions are accompanied by the formation of B₂H₆; its yield depends on the nature of CdX₂, MBH₄and correlates with the calculated values. It is shown that the mechanochemical synthesis of B₂H₆ depends on temperature within the range 50_120

The possibility to apply time-resolved fluorescence spectroscopy to the analysis of mixtures of aromatic amines or nitro compounds after their preliminary reduction to amines is demonstrated.