Izvestiya of Saratov University.
Chemistry. Biology. Ecology
ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)

Химия

ТЕРМОДИНАМИЧЕСКОЕ МОДЕЛИРОВАНИЕ БЕЗРАВНОВЕСНЫХ ПРОЦЕССОВ В БИОХИМИЧЕСКИХ СИСТЕМАХ

Предметом нашего исследования являлись режимы безравновесного протекания химических реакций, критеризация которых открывает возможности преодоления затруднений проведения реакций в мягких условиях. В биохимической реакционной системе процесс, не ведущий её к химическому равновесию, возможен при индукционном сопряжении реакций либо при сопряжении парциальных реакций.

REACTIONS OF CYCLOCONDENSATION OF CARBONYL COMPOUNDS WITH THIOCARBAMIDES AND RELATED SYSTEMS

The paper shows the pathways for the synthesis of hydrogenated azines and azoles containing two or more heteroatoms via the interaction of carbonyl compounds of various series with thiocarbamides and their derivatives under conditions of basic and acidic catalysis. Theoretical and preparative aspects of the reactions leading to the formation of functionally substituted dihydropyrimidines, dihydrothiazines, pyrazolines, thiapyrrolines, and thiadiazolines are presented.

Ionic Associates of Halcogenpyrilocyanic Dyes with Inorganic Anions

The interaction of cationic halcogenpyrilocyanic dyes, 2,6-diphenil-4-(4-dimethylaminostyryl)pyrylium and -thapyrylium chlorides, with inorganic ions in aqueous solutions was studied. The spectrophotometric characteristics and stability constants of the resulting ion pairs were determined.

A Correlation between Energetic Parameters and Performance of Some Solid Materials

The work was aimed at establishing new correlations between some known energetic characteristics of several materials and their performance.

Nanotechnologies of Obtaining Silicon-containing Melange Xerogels for the Design of New Test Systems

A melange gel technology of obtaining xerogels of silic acid modified with organic reactants has been designed. The technology is based on the extraction of micellar phase of non-ionic surfactants with organic reactants and its deposition on the surface of xerogels.

General Invariant of Contents of Inorganic Chemistry

The article is dedicated to systematization and structuring of content of college inorganic chemistry course. Author introduced comprehend scheme for studying the facts of inorganic chemistry.

A Quantum-Chemical Investigation of Water – Monatomic Alcohols System

A quantum-chemical calculation of characteristics of aliphatic alcohols and water molecules as well as their compounds is carried out. It's shown that these substances are the strongly associated liquids of definite structure. The structure of water-alcohol associates with different ratios of components is considered.

Topological Transformation of the Phase Diagram of the Ternary Sodium Nitrate – Water – Acetonitrile System

Phase equilibria and critical phenomena in the ternary sodium nitrate – water – acetonitrile system, where the constituent binary liquid system is characterized by phase separation with an upper critical solution temperature, were studied by means of the visual-polymermal method within –5…+80°C.

Characterization of the Lipopolysaccharide of the Diazotrophic Rhizobacterium Azospirillum Brasilense Sr55

This work was undertaken to investigate the lipopolysaccharide from gram-negative, plant-growth-promoting diazotrophic rhizobacterium Azospirillum brasilense SR55 isolated from the roots of wheat in Saratov oblast. The lipopolysaccharide was extracted from the outer membrane with phenol, and its chemical makeup was studied.

Influence of Microwaves on the Morphology of Aqueous Solutions of Polydryl Alcohol

The nature of influence of microwaves on the process of dissolution of a crystallizable polymer, the primary level of supramolecular order and the formation kinetics of the secondary one in aqueous solutions of polydryl alcohol was studied. Microwaves were found to significantly reduce the period of visually-controlled dissolution of the polymer.

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