The article presents the results of studies of changes in
the atomic radii of the elements of the periodic table,
depending on their atomic masses. It is shown that the
appearance of p- and d-orbitals introduces a significant
contribution to the value of the atomic radius, and the
appearance of f-orbitals makes a significantly smaller
contribution to the given value. A radial-mass model of
calculations of atomic radii for the elements of the
Periodic Table was developed. Optimal conditions for
making calculations were chosen. For the first time the
values of atomic radii for elements with the order
number 103-120 are calculated. It is shown that the
values of atomic radii for elements with the order
number 103-120 are in the range from 140 to 335
picometers and regularly change in the period
The article presents the results of studies of changes in
the atomic radii of isotopes of the elements of the
periodic table. With using the mass-radial model of
calculations, the values of atomic radii for isotopes of
chemical elements were obtained. It is shown that the
atomic radius of different isotopes of one element is
different and depends on the mass and radius of the
nucleus. To study the changes in ∆Rav values in the
groups and periods of the Periodic Table of Chemical
Elements, the ∆Rav dependences on the period number
and group number are constructed. It is found that the
values depending on the number ∆Rav period / group
for the d-elements lie in the low ∆Rav values for selements
- in high ∆Rav values, and p-elements - in
average values ∆Rav. It is shown that when the atomic
nucleus is increased by 1 neutron, the atomic radius
increases from 0.01 to 4.76 pm, which is due to the
physical effect inside the atom
The аrticle is devoted to study of adsorption of enzymes, antioxidants contained in horseradish root on starch to create enterosorbent with anti-oxidant properties. For this goal we have studied adsorption isotherm calculated constants, thermodynamic parameters (change of enthalpy, entropy, and isobaric-isothermal potential); sorption kinetics of enzyme-antioxidants on starch and calculate the main characteristics. The method of producing of enterosorbent - antioxidant on based starches has been developed based on the experimental data. The ready sorbent is a white powder having no taste and smell. In biological fluids and water, it is insoluble. The enterosorbent on starch does not dissolve in water and biological fluids. It is the solid component. This enterosorbent can be used to protect the gastrointestinal tract of humans and animals against a wide variety of oxidants and peroxide. The results of this work will form the basis for the study of the antioxidant properties of the resulting enterosorbent. The results showed that during the tests, the enterosorbent on the starch showed good antioxidant properties. It has high antioxidant activity with respect to hydrogen peroxide
The article is devoted to studying adsorption of enzymes,
antioxidants contained in horseradish root on
starch to create enterosorbent with anti-oxidant properties.
For this goal, we have studied adsorption isotherm
calculated constants, thermodynamic parameters
(change of enthalpy, entropy, and isobaric-isothermal
potential); sorption kinetics of enzyme-antioxidants on
starch and calculate the main characteristics. The
method of producing of enterosorbent - antioxidant on
based starches has been developed based on the experimental
data. The ready sorbent is a white powder having
no taste and smell. Insoluble in biological fluids
and water. It is the solid component. The enterosorbent
can be used to protect the gastrointestinal tract of humans
and animals against a wide variety of oxidants
and peroxide. The results of this work will form the
basis for the study of the antioxidant properties of the
resulting enterosorbent
The present work describes the chemical synthesis of
poly-N,N-diallyl pyrrolidinium bromide and polyN,N-diallyl
morpholinium bromide - high-molecular
compounds containing quaternary nitrogen atoms,
which included in two five- and/or six-membered
heterocyclic rings. These polymers are perspective
modifiers for industrially produced anion-exchange
membranes, the use of which should significantly
improve the resistance to degradation of the
membranes at over-limiting current regimes. The
structure of obtained polymers was characterized by
FTIR, 1H and 13C NMR spectroscopy. The optimal
reaction conditions, which increase the yield of desired
products, were defined. It is shown that is preferable to
use 1-butanol as a solvent and benzoyl peroxide as an
initiator
The results of investigation of melanoidin’s formation
early stages in acidic ethanolic D-glucose – p-toluidine
model system are presented. Based on the elemental
analysis, IR- and UV-spectroscopy data obtained we
have shown, that in system studied Amadori
rearrangement product undergo the aryl amine
elimination during browning to form a nonnitrogenous
reductons with antioxidative activity in
processes of linoleic acid oxidation. It is also noted,
that in system studied inhibition of carbohydrate’s
destruction occurs because of non-reactive O-ethylglycosides
formation. The data obtained may be useful
for technology of carbohydrate-containing raw
material
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.
This article solves the task of identification the
interrelation and interdependence of structural
microdefects of various polymeric materials,
consisting in the estimation of the structural
parameters under uniaxial deformation. It is
experimentally shown that the process of changing
microdefects in the material bulk begins to flow more
intensely during deformation of the material, having
anisotropic structures in the bulk. Change of the
parameters of microdefects is not observed compared
to the starting material at small quantities of the
deformation. In the area of deformation corresponding
to the transition of the material from isotropic to
anisotropic state parameters of microdefects do not
depend on the degree of deformation of the sample,
and abrupt changes of the parameters of microdefects
are observed after completing the formation of
anisotropic patterns. It is shown experimentally the
identity of the parameters of microdefects in the bulk
material (rubber-based natural caoutchouc) during
deformation with the quantities of local deformations
at the edge of the artificially created macrodefects.
Under uniaxial deformation more than 280-300% and
the growth of the quantities of local deformations
come out at the edge of the artificially created
macrodefects and normalized linear dimension k and
decrease the total number n of microdefects
In this article, we discuss the relationship between the
previously obtained model for calculating atomic radii
with electrodynamics, the hydrodynamic model of the
planets of the Solar System, and the R-function of the
structural organization of electronic systems. It is
shown that the curve of the dependence of the value
of the correction coefficient e
x
on the atomic number
of the element in form coincides with the dependence
of the ionization energy on the mass of the atom and
the R-function on the nuclear charge. The concept of
the "atomic nucleus potential", which takes into
account the energy of the nucleus and the charge of
the nucleus of the atom, is introduced. It is shown that
the radius of an atom is the product of the nuclear
potential by a factor kx
, taking into account the
characteristics of electronic levels; the energy of the
nuclear reaction is the work of the forces of the field
(potential) of the atomic nucleus along the
displacement of the atomic charge. The dependence of
the potential of the nucleus on the charge number in
the Mendeleev’s Periodic Table is shown. It is shown
that any system of satellites (or atomic shells) has a
constant ratio of its Kepler number to the mass of the
central body around which they rotate. It is shown that
in the Table of Mendeleev's chemical elements and in
the solar system, the fundamental value is the mass of
the center (the nucleus of the atom or the center of the
orbit). The ratio of the Kepler number to the mass of
the central body is a constant, within the accuracy of
construction and calculations
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 method has been developed of simultaneous
determination of active ingredients of different kinds
of pesticides in biological tissues (fish liver) by
applying HPLC with ultra-violet detection and the
rapid method of QuEChERS sample preparation. We
defined optimum volume and composition of the
reagents for the extraction, time of centrifugation and
ultrasound treatment, the origin and composition of
sorbents that ensure maximum extraction of the
substances studied and further cleanup of interfering
substances. Acetonitrile was used as a solvent. The
extraction was carried out in the presence of a
buffering mixture - trisodium citrate dihydrate and
disodium citrate hemihydrate. Bondesil PSA bulk
sorbents (alkylated amine containing two amine
functional groups - secondary and primary) and C18E
(reversed-phase sorbent based on silica gel with
grafted octadecylsilane groups were used to purify the
extract from coextractable substances (fats, proteins,
sugars, organic and fatty acids, pigments and other
impurities). The degree of extraction of the analyzed
active ingredients of pesticides from the liver of fish
was 79%. The detectable pesticide concentrations
ranged from 0,4 to 0,97 mg/kg. The relative standard
deviation of the analysis results amounted to 0,01-0,14