To develop the novel herbicide antidotes for the
sunflower vegetative plants, the group of chemical
compounds, belonging to the derivatives of
isoxalopyrazolopyridines was synthesized and their
antidote activity both in the laboratory and field
experiments was studied. The compounds with a high
antidote effect were found
The article presents the experimental results of the
study of the concentration dependence of the electrical
conductivity of heterogeneous ion-exchange
membranes that are in contact with solutions of weak
electrolytes - carboxylic acids. It is shown that in this
case the membrane conductivity is higher than the
conductivity of the solution, wherein the conductivity
of cation exchange membranes substantially greater
(by an order of magnitude) than the conductivity of
anion exchange membranes. This fact must be
considered when designing the actual electrodialysis
processes of processing solutions containing organic
ions. The work identified the need to develop modern
ideas about transport and the structural organization of
ion-exchange materials, to describe the structure of the
ion-exchange membranes that are in contact with weak
electrolytes solutions
Theoretically and experimentally, we investigated the
process of adjusting the pH of natural water of
hydrocarbonate class electrodialyzer with bipolar
membranes with channel length of 40 cm. We
experimentally measured concentration of
components, pH of the solutions in alkaline and acid
channels of electrodeposition depending on the current
density. The article describes a mathematical model
for long channels; to scale the mass transfer
characteristics of the process there was applied and
verified a method of compartmentalization, which
gave the possibility to calculate the dependence of the
component along the channel length at different
velocities of flow of the solution. Numerical
calculations were compared with experimental data on
electrodialyser of 10 cm and 40 cm length
Since the industrial revolution a huge amount of pollutants
emitted annually into the water most of which is
occupied by toxic metals. These metals widely distributed
in the environment and of accumulation of a
threat to human health. It is known, that cadmium and
zinc at high concentrations have a negative impact on
nature. In modern wastewater treatment technology we
widely use polymeric sorbents with chelating properties.
The use of polymeric chelating sorbents (PCS)
usage allows separating individual or group trace elements
from large volumes of solutions of complex
composition, lowering the limit of detection, eliminating
or reducing significantly the impact of macrocomponents
which increases the cleaning efficiency.
The article presents the results of a study of conditions
of interaction of zinc (II) ions and cadmium (II) with
PCT - polystyrene-azo-o-phenol-azo-rhodanine. We
found the optimal values of the conditions for zinc (II)
ions and cadmium (II) sorption. We investigated the
effect of interfering of the macro- and micro- water
components with the sorption of the ions studied.
Maximum desorption of metal ions is achieved by
washing the concentrate with 10 ml of 2M hydrochloric
acid. The data indicate availability of the investigated
sorbent for concentration and separation of zinc
(II) ions and cadmium (II)
The article is devoted to the study of enzymesantioxidants
contained in horseradish root. The article
provides a detailed analysis of the sources of information,
aimed at clarifying the content of enzymesantioxidants
contained in horseradish root, grown in
the Astrakhan region in the autumn and summer. During
the analysis of the literature, it was found that the
content of enzyme-antioxidants in the root of the
horseradish is not constant and depends on climatic
conditions, planting time and harvest time. The content
of antioxidants in the root of horseradish grown in the
Astrakhan region in the summer-autumn period was
studied using by the method of A.N. Bach and A.I.
Oparin. 2 g of horseradish roots contains the number
of enzymes - antioxidants able to expand for 30 min
(1,547 • 100) / (20 • 1) = 77.35 mg of hydrogen peroxide
in 1 min - 2.56 mg. 1mkmol As hydrogen peroxide
is 0.034 mg, in 2 g horseradish contains 76 E enzyme -
antioxidants (or E 38 1 g horseradish). The results of
this work will form the basis for the creation and study
of new enterosorbent with antioxidant functions. Enterosorbent
prepared by adsorption on starch antioxidants
such as peroxidase, catalase, and ascorbic acid,
from aqueous extracts of plant material
The article illustrates the results of the research dedicated to finding a method of combining two polymeric materials - ion-exchange membranes having different chemical nature. It shows a method of applying a homogenous film MF 4SK on the surface of the heterogeneous membrane substrate to produce a chemically and mechanically stable asymmetric bipolar membrane. We have selected membrane substrate ensuring the best electrochemical performance
The article studies adsorption of ascorbic acid on
KSMG silicagel. The experimental results, the basic
thermodynamic characteristics of ascorbic acid adsorption
on oxide silicon have been used for treatment of
adsorption mechanism of ascorbic acid on silica
KSMG. Results of the study ascorbic acid adsorption
on silica gel KSMG may be used for further identification
of it in the various objects
Studying natural phenomena in all their diversity,
humanity worked experienced in every field of
science the model of perceiving the world and
methods of obtaining information. The development
of science currently cannot be imagined without
research on the intersection of its regions. This
article presents the results of the automated systemcognitive
analysis of the size of atoms from the
main characteristics that are of research at the
interface of General chemistry elements and
intelligent systems. Dependence of nuclear radius,
mass and of the atom and the charge number are
identical in shape and size, which is probably
connected with the linear increase of these
parameters in the Periodic system of chemical
elements. There is also a similar form of the
dependences of radii of atoms from the factors ex
and x, because these factors are interrelated. The
obtained results of the ask analysis have confirmed
the theoretical assumptions and the formulae of the
dependence of main characteristics of the atom
Macrodeficiency of polymeric materials, including the
pervasive one, is a consequence of the development of
initial microdefects which appear in polymers both
due to external factors and during their processing. In
the article, the problem of the detection of structural
microdeficiency of various polymeric materials
through an assessment of their structural parameters is
solved. The considered materials possess
approximately identical degree of crystallinity (60 –
66%), but different density. The express assessment
technique of polymeric materials microdeficiency by
the sorption method with the use of the academician
M. M. Dubinin’s theory of volumetric micropore
filling is developed and evaluated. On the basis of a
quantitative assessment of sorption processes in
polymeric materials, including elastomeric
compositions – rubbers and rubberized fabrics, the
existence of the initial local microdefects arising in
the course of synthesis is established. In real
polymeric materials, including elastomeric
compositions – rubbers and rubberized fabrics, the
existence of the initial local microdefects arising in
the course of synthesis is established (the number of
microdefects n varies from 1x1017 sm-3 to 6x1019 sm-3
,
and the rated linear size k – from 2 nm to 7 nm). The
general reduction of microdeficiency in rubberized
fabrics in comparison with initial rubber is revealed
and rationalized
The change in the Kepler’s atomic number in the
Periodic Table of Mendeleev is studied. It is shown
that its values decrease regularly with increasing
nuclear charge. An alternative formula for computing
the values of the Kepler’s atomic number is proposed.
It is shown that the ratio of the atomic number of
Kepler’s to the mass of the atom is a constant for each
period. The values of these constants are calculated