The electrochemical generalized equation of the protonic particles interaction of the oxidized and reduced forms of the peroxomonosulphate/sulphate system was derived and the theoretical interpretation of the oxidation-reduction potential dependence on рН medium was given. Authors show that at the change of the pH value the nature of chemical particles changes, and therefore the form of the electrochemical generalized equation transforms. That leads to the dependence of the oxidation-reduction potential on the рН medium. The numerical calculation of the dependence of Е on рН was performed.
Synthesis of new hydroxychalkones and their analogs has been made on the basis of aromatic and heterocyclic aldehydes with phosphonium salts. The method of Wittig reaction in the presence of triethylamine has been worked out. The compounds obtained can show physiological activity and valuable pharmacological activity. They are also interesting in the context of use of derivatives of hydroxychalkones as compounds for synthesis of flavon type substances.
The genoprotective effectiveness of extracts of the tea leaf acquired on different stages of their technological processing has been studied at modification of the mutation process induced by gamma-rays, Nitrosomethylurea and dimethil (a) antrocene in cells of wheat and oats. The efficiency of anti-mutagenic influence of extracts is gradually reduced on stages of the production process. Comparative assessment of their anti-mutagenic effectiveness has revealed high anti-mutagenic effectiveness of the extract received from the green tea leaves.
Authors have shown that when the cleavage crack crosses the border of the artificially introduced and aged slipband at {110}, the spreading rate of the crack in LiF crystals changes in comparison with the same value at crossing the fresh slipband. The cleaved surface relief in the first and the second cases is also different. Reasons of the change of speed of the crack and differences in the cleaved surface relief are determined.
In our previous article we discovered convection in thin horizontal flat water layer when we put a drop of dye water solution. In this article authors present results of the research of dependence of mass-transfer speed on the layer thickness. Authors were able to reveal that the effective diffusivity coefficient is decreased proportionally to the layer thickness declining. Convective mass-transfer is almost eliminated at 0,5 mm-thick layer.
New generalizations of the Morera function holomorphy theorem have been obtained. The precise conditions of growth of ? ?C(H2) under which the boundary of a hyperbolic rectangle, or the boundary of a hyperbolic quadrangle act as the Morera set for the group of transitions of the NA hyperbolic plane H2 have been determined. The cases of two hyperbolic rectangles and two hyperbolic quadrangles have also been considered. Examples of functions with zero integrals on borders of hyperbolic rectangles and functions with zero integrals on borders of hyperbolic quadrangles, confirming the accuracy of conditions acquired.
In this article, the author raises the question of the use of statistical, mathematical methods for analysis of information and process. The author provides examples of such methods in information technology.
In this article calculation of the optimal length of a metamaterial for effective transformation of frequency on the given length in similar environments is considered.
The subject of the research is the inverse problem of filtration theory, which allows objective clarification of collector features of the productive bed while using the actual data. The dependencies on the time of discharge of the liquid, gas and bed pressure in wells are required for this purpose.
Authors consider conditions of changing indicators and phase changes in the development of organizations on the basis of results of proving theorems of random values of their indexes measurement.
The author considers an accurate expression for the cluster expansion of the configuration integral of the system of interacting particles. Investigations of this expression indicate the beginning of the gas-liquid transition at the singularity points of isothermal compressibility. It has also been shown that the adequacy boundary of the virial equation of state corresponds to these points - not the virial range singularities. At the high density region the inappropriate behavior of the cluster expansion has been discovered that may be related to the infinite limits of the cluster integrals, i.e. their independency on density.
Today
Yesterday
This week
This month
All days
Number of views: 598