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 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 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 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 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