FIRM-CONTACT ION-SELECTIVE ELECTRODE
FOR DEFINITION OF IONS OF ALUMINUM
O.V. Vinogradov, S.S. Ryasenskii, N.V. Baranova
Tver State University, Tver
Department of Inorganic and Analytical Chemistry
The firm-contact ion-selective electrode with a response to an aluminum ion is developed and made.
For stabilization of potential the iono-electronic transdyuser on the basis of polyaniline is used.
Possibility of practical use of the made electrode is shown.
Keywords: ion-selective electrode, electropro-water polymer, polyaniline.
COMPLEXATION PROCESSES IN SYSTEMS THAT CONTAIN MANGANESE IONS
(II), HIGH-MOLECULAR HEPARIN AND PROLINE.
T.V. Kryukov, M.A. Feofanova, M.I. Skobin, N.V. Baranova, M.V. Minina
Tver State University
Department of Inorganic and Analytical Chemistry
Using mathematical modeling of the experimental data such as pH-titration in physionlogical
environment (t = 37° C; background electrolyte 0.15 M NaCl). Chemical equilibriums are
investigated in multicomponent system Mn (II) - heparin - proline. Significance of complex forms is
determined; values of the logarithms of the formation constants of complex forms are calculated.
Keywords: heparin, proline, complex, manganese ion (II)
INFLUENCE ON VEGETABLE ORGANISMS OF COMPLEXES
OF BORON WITH COMPLEXONES, DERIVATIVES
OF SUCCINIC ACID
T.I. Smirnova1, E.D. Malakhayev1, V.M. Nikolskiy2, L.N. Tolkacheva2, I.N. Baranovskiy1,
T.V. Mikhaylovskaya2
1
Tver state agricultural academy
Department of Agricultural Chemistry, Soil Science and Agroecology
2
Tver state university
Department of Inorganic and Analytical Chemistry
The boron is absorbed by plants in the form of borat-anions which can be present at the soil in a look
the chelates of complexes, for example, with ecologically safe ligands - complexones, derivatives of
succinic acid. Nature of influence the boron complexes on a chemical composition of plants is
established. By results of experiment the conclusion about higher biological activity of a boron
complex in comparison with in-coordinate boron was made.
Keywords: boron, plants, complexones, derivatives of succinic acid.
CAPILLARY-MEMBRANE DRAINAGES AND THEIR STABILITY IN WATER
ENVIRONMENTS
I.P. Storozhuk1, G.E. Bordina2, N.P. Lopina2, R.N. Chirkov3,
V.V. Artamonov3
1
Institute of Organoelement Compounds named after A.N. Nesmeyanov
Russian Academy of Sciences
Tver State Medical Academy
2
Department of Chemistry
3
Department of Surgery with the course optional Oncology
Designs of new types of the capillary-membrane drainages (CMD) are developed and research of their
stability in water environments (water, physiological solutions) is conducted. Designs were carried out
from acetate-cellulose membranes with a strengthening substrate on the basis of a nonwoven polyester
fabric by means of BF-6 glue and the metal probes covered with a ftoroplast film.
Keywords: capillary-membrane drainage, strengthening substrate, draining, acetate-cellulose
membrane.
RECEIVING THE MAGNETIC POLYMERIC COMPOSITE ON THE BASIS OF
STRONTIUM FERRITE
N.V. Verolainen, A.Yu. Kopnina, L. I. Voronchikhina
Tver state universary
Chare of organic chemistry
Results of the researches directed on creation of heat-resistant polymeric material with
magnetoelectric and effective physical and chemical properties are presented. The received composite
material of optimum structure on the basis of siloksanovy polymer and ferrite of the strontium
modified by means of surface-active substances possesses high strength characteristics and the
magnetooperated properties.
KW: strontium ferrite, lestosil, composite material, stabilization, anion surface-active
substances, sedimentatsionny stability.
SYNTHESIS DERIVATIVES OF TRIETHYLAMINE IONIC LIQUIDS AND STUDY OF
THEIR THERMAL PROPERTIES
O.I. Postnova, I.A. Presnyakov, O.E. Zhuravlev,
L.I. Voronchihina
Tver State University
Chare of organic chemistry
Synthesized ionic liquids - tetrafluoroborates and hexafluorophosphate alkiltrietilammoniya and
studied their thermal stability. A comparative analysis of the thermal stability of tetrafluoroborates and
hexafluorophosphate with halides alkiltrietilammonium.
Keywords: ionic liquid, quaternary ammonium salts, tetrafluoroborates hexafluorophosphate.
ACID ESTERS AS A BASIS FTALILGLITSINA
SYNTHETIC LUBRICANTS
L.I. Voronchikhina, O.E. Zhuravlev, N.I. Krotova, I.A. Presnyakov,
E.V. Andrianov
Tver State University
Chare of organic chemistry
Synthesized acid esters of ftalilglitsina based on individual higher alcohols, their technical and
ethoxylated alcohols factions for their research as the basis of mineral oils in the composition of textile
auxiliaries. The thermal stability of the air, freeze point, flash point, burning point and the dynamic
viscosity. It is shown that the esters of higher alcohols and synthanol DS-10 on the complex properties
of superior industrial petroleum oils and can be recommended for use as a mineral oil based.
Keywords: acid esters, oil-soluble surfactant, a thermally stable grease phthalates.
FEATURES OF THE SPECTRAL TRANSMISSION OF GERMANIUM SINGLE
CRYSTALS IN A SPECTRAL RANGE 1000-520 СM-1
M.Yu. Ghavalyan, I.A. Kaplunov
Tver State University,
In this study we investigated the optical properties of pure and doped germanium single crystals in the
spectral range 1000-520 cm-1. there was shown the effect of dopants and oxygen presence in Germany
on the position and shape of the phonon absorption peaks.
Keywords: Single crystals, germanium, isotopes, doped crystals, electroactive impurities,
electrically neutral impurities, infrared optics, spectral transmittance, spectrum of phonon
absorption.
STUDY OF ELECTRONIC STRUCTURE OF SIMLE EPHIRS IN FRAMEWORK
«QUANTUM THEORY OF ATOMS IN MOLECULE»
E. M. Chernova1, V. V. Turovtsev1.2, Yu. D. Orlov1
1
Tver state university
Tver state medical academy
2
The equilibrium structure and the distribution of electronic density alkyl ethers found by DFT method
B3LYP/6-311++G(3df,3pd) were studied in the framework of the “quantum theory of atoms in a
mole-cules" (QTAIM). Range of the inductive effect was defined and highlighted the effect of the
shielding of the group O.
Keywords: quantum theory of atoms in molecule, electron density, inductive effect, charges at atoms,
spin density, QSPR, ethers.
QUANTUM CHEMICAL STUDYING OF RADICALS THIOCARBOXYLIC ACIDS
N.P. Rusakova1, V.A. Kotomkin1, V.V. Turovtsev2, Yu.D. Orlov1
1
2
Tver State University
Tver State Medical Academy
The radical of tiobutane acid С3H7C(O)S● was studied. The electron structures of conformers of the
series CnH2n+1–C(O)S●, where 1 ≤ n ≤ 10, were examined in the framework of the "quantum theory of
atoms in molecules" (QTAIM). The qualitative scale electronegativity of functional groups χ(R)
CnH2n+1–C(O)S● was compiled. The data are compared with the previously series studied CH3–(CH2)n–
C(O)SH and CH3–(CH2)n–C(S)OH, where n ≤ 9, and built an extended range χ(R).
Keywords: electron density, electronegativity, conformational analysis, internal rotation, inductive
effect, steric effect.
THE STUDY OF THE PROCESSES OF CHANGE AT THE STOICHIOMETRIC
COMPOSITION OF ELECTROCHEMICAL DEPOSITION AND DISSOLUTION OF
MANGANESE (IV)
E.B. Godunov, I. V. Artamonova, T.V. Martynova, A.N. Shirocova
Moscow State of Mechanical Engineering
The processes of change in the stoichiometric composition occurring during the electrochemical
deposition and dissolution of manganese (IV) on a platinum electrode from sulfuric acid solutions
of manganese sulfate (II). Calculated electrochemical parameters of these processes to reflect
changes in the stoichiometric composition.
Keywords: the stoichiometric composition, manganese oxide (IV), a platinum electrode, the
electrochemical deposition and dissolution.
BIOCATALYTIC TRANSESTERIFICATION IN SUPERCRITICAL FLUIDS
N.V. Lakina, I.P. Shkileva, O.S. Burmatova, K.E. Salnikova
Tver State Technical University
Department of Biotechnology and chemistry
The article provides an overview of trends in the application of lipases in the process of esterification
and transesterification of industrially important chemical compounds in solvents and supercritical
fluids. Possible limitations of the lipases application were indicated. The dependence of the activity of
the lipase on the type of producer, temperature, pressure, ratio of reagents was analyzed. It is shown
that lipase can be successfully used for the enzymatic synthesis of biodiesel and valuable chemical
intermediates with high yields.
Keywords: lipase, transesterification, biodiesel, supercritical fluids
LIQUID PHASE METHANOL SYNTHESIS OVER POLYMER STABILIZED
ZINC-BASED CATALYST
V.V. Smelkova, M.A. Rubin, A.I. Sidorov, E.M. Sulman
Tver State Technical University
Department of Biotechnology and Chemistry
The work is devoted to the possibility of application of polymer-stabilized Zinc-based catalyst in a
liquid-phase methanol synthesis. In this paper the effect of the active phase of the catalyst content and
the effect of solvent polarity on the rate of formation of methanol were studied. Varying the
composition of the active phase of the catalyst in the range from 3% to 10% Zn MN100, the highest
rate of methanol was reached at 7,5% Zn MN100. At varying ratios dodecane - isopropyl alcohol the
highest rate of methanol formation was achieved in the experiment in pure isopropyl alcohol with
selectivity to methanol of 92.5%. It is shown that the major side product of the synthesis was methane.
Keywords: liquid-phase methanol synthesis, Zinc-based catalyst, the composition of the solvent.
INFLUENCE OF INDUSTRIAL POLLUTION ON A CHEMICAL COMPOSITION AND
MORPHOLOGY
OF YARROW AND PLANTAIN
N. А. Solovyeva, D. М. Тоrоpоvа, Y. G. Оlеnеvа,
S.D. Khizhnyak, P.М. Pаkhоmоv
Tver State University
The chemical composition of the medicinal herbs - yarrow and plantain collected in areas with
different degrees of environmental stress is investigated by means of FTIR, UV and atomic
adsorption spectroscopy (AAS). It is established that composition of the analyzed herbs depends on
the anthropogenic impact. Sensitiveness of the samples to a particular source of pollution is defined
by the plant species.
Keywords: yarrow Achilléa millefólium, plantain Plantágo májor, atomic adsorption spectroscopy
(AAS), Fourier transform infrared and UV spectroscopy.
DEPARTMENT OF CHEMISTRY TVER STATE
MEDICAL ACADEMY - 60 YEARS
G.M. Zubarev, G.E. Bordinа, N.P. Lopina, Ya.M. Khalyapina
Tver State Medical Academy
Department of chemistry
In connection with the anniversary of the Tver State Medical Academy is a brief outline of the main
stages of the development of the department of chemistry.
Keywords: department of chemistry, history of the department of chemistry, Tver State Medical
Academy