STUDY OF COMPLEX FORMATION ZINC IONS
WITH HEPARIN AND ARGININE METHODS PH-METRY
AND MATHEMATICAL MODELING
M.A. Feofanova, M.I. Skobin, T.V. Krukov, N.V. Baranova
Tver state University
Department of inorganic and analytical chemistry
The study of the interactions in the system, including high-molecular heparin, ions Zn2+ and amino
acid (arginine), was conducted according to the experimental data of pH-metric titration of aqueous
solutions (I = 0.15 (NaCl), t = 37 degrees C) at a ratio of 1 : 1 : 1 initial concentrations of the
components of the system by the method of mathematical modeling. The calculation showed the
presence in the system of many complex forms, including interest to us ternary complexes. Constants
are defined sustainability detected complex forms. Built and analyzed the diagram of distribution of
complex forms in the system under study: ZnCl2 - Na4Hep - HArg - H2O - NaCl.
Keywords: stability constant of heparin, arginine, zinc, pH-metry, mathematical modeling.
SPECTRAL CHARACTERISTICS OF AN AQUEOUS SOLUTION OF IRON(III)
COMLEXES WITH AMPICILLIN AND CEFTAZIDIME
IN THE VISIBLE AREA
M.V. Minina
Tver State University
Division of inorganic and analytical chemistry
Сomplexes of iron (III) with ampicillin and ceftazidime were investigated by visible
spectrophotometry. Spectra of aqueous solutions of the complexes with a molar ratio of iron:
antibiotic = 1: 3, as well as solutions FeCl3 and Fe(CH3COO)3 were recorded in the range 400 - 800
nm. Spectral characteristics of the complexes were determined by linear extrapolation of the
absorbance of the concentration to a series of solutions with different concentrations: a complex of Fe
(III) with ampicillin - λmax = 427 nm, εmax = 161 l/(mol • cm), a complex of Fe (III) with ceftazidime λmax = 427 nm, εmax = 511 l/(mol • cm). Spectra of aqueous solutions of the complexes showed a
greater shift of the absorption bands and the increase of the molar absorption coefficient as compared
with complexes Fe(CH3COO)3, suggesting that the antibiotics zwitterions coordinated iron(III) not
only through the carboxylate but also through the beta-lactam group.
Keywords: iron complexes, complexes of ampicillin, complexes of ceftazidime
INFLUENCE OF COMPOSTS ON THE BASIS OF RAINFALL OF SEWAGE ON THE
AGROECOLOGICAL CHARACTERISTIC
CESPITOSE AND PODSOLIC SOIL AND ITS EFFICIENCY
I.N.Baranovskiy1, T.I Smirnova1, V.M. of Nikolskiy2,
E.S. Loginova2
Tver state agricultural academy
Department of agrochemistry, soil science and agroecology
Tver state university
2
Department of inorganic and analytical chemistry
1
Results of researches on development of composition of composts with paticipation of a deposit of
sewage and organic fillers are given, their chemical composition is presented. Influence of composts
on accumulation in the cespitose and podsolic soil of heavy metals, on the level of the nutritious mode
and on productivity of the cultivated cultures is shown.
Keywords: deposit of sewage, organic fillers, composts, heavy metals, nutritious mode, productivity.
TUBULAR- MEMBRANE DRAINAGES AS CARRIERS ANTISEPTIC
AND MEDICINAL PREPARATION
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
Designed technology of the fabrication tubular-membrane polymeric material for making modern
drainage device, which answered the main medical requirements and principle draining space and
cavities of the organism of the person.
Keywords: tubular- membrane drainage, draining, acetate-cellulose membrane, surgical drainage,
drainage of the system
THE THERMAL BEHAVIOR OF 1,3-TETRACHLOROFERRATE
DIALKYLIMIDAZOLIUM - PARAMAGNETIC IONIC LIQUIDS
O.E. Zhuravlev, I.A. Presnyakov, L.I. Voronchihina
Tver State University
In this paper we investigate the process of thermal destruction of new magnetic ionic liquids tetrachloroferrate 1,3-disubstituted imidazolium derivatives. The mechanism of thermal destruction
was proposed.
Key words: tetrachloroferrate, ionic liquids, paramagnetism, thermal stability.
ALKYLAMIDOBETAINES BASED
N,N-DIMETILPROPANDIAMINA-1,3
L.I. Voronchikhina, O.E. Zhuravlev, N.I. Krotova, Y.A. Orlikova
Tver State University
Synthesized amphoteric surfactants based on N,N-dimetilpropandiamina-1,3 and studied their colloidchemical properties. The dependence between the isoelectric point of ampholytes and the change of
surface tension, wetting and foaming power alkylamidobetaine.
Keywords: amphoteric surfactants, the isoelectric point, colloid-chemical properties.
RECEIVING THE MAGNETIC POLYMERIC COMPOSITE
ON THE BASIS OF STRONTIUM FERRITE
N.V. Verolainen, S.V. Kruzhkova, L. I. Voronchikhina
Tver state universary
Chare of organic chemistry
Investigated colloidal-chemical properties of N-hexadecylpyridinium chloride and its mixtures with
nonionic surfactants. A possibility of using synergistic mixtures of cationic and nonionic surfactants as
stabilizers when creating stable suspensions heterogeneous dosage forms.
Keywords: synergetic effect, stabilization, surface-active substances, sedimentation stability,
suspension.
THE STUDY OF THE DYNAMICS OF ACCUMULATION
OF THE PRODUCTS OF OXIDATION AND HYDROLYSIS
OF LIPIDS IN THE FEED
A. S. Levina, I.U. Egorova
Tver State University
Department of Organic Chemistry
Dynamics of accumulation of oxidative degradation products in feeds. It is established that the
maximum allowable concentration of both primary and secondary products of oxidation and
hydrolysis of lipids in the feed occurs before the expiration of the retention period.
Keywords: lipids, oxidative degradation and hydrolysis, compound feeds.
O-DIANISIDINE OXIDATION BY HETEROGENEOUS CATALYSTS ON THE BASIS
IMMOBILIZED OXIDIREDUCTASES
B. Tikhonov, P. Stadolnikova, A. Sidorov, E. Sulman
Tver State Technical University
Creation of effective catalysts of oxidation of o-dianizidin on the base of Horseradish Peroxidase
immobilized on various solid carriers and research of its kinetic parameters was an objective of this
work.
Keywords: о-dianisidine, oxidation, catalysts, oxidoreductases, horseradish peroxidase.
THE KINETICS OF GOLD OXIDATIVE DISSOLUTION
BY THIOUREA-THIOCYANATE SYSTEM
Y.V. Chursanov, V.I. Lutsik, S.A. Starovoytov, Y.M. Potashnikov
Tver Technical University, department of chemistry
The dissolution of gold in thiourea-thiocyanate solutions has been studied by the rotating-disc
technique using ferric sulfate as oxidant. The mixed solution has significant synergy on the
dissolution rate in compare with individual systems. The synergistic effect was attributed to the
formation of a mixed ligand complex. It is found, that gold dissolution is a mixed-control process
(apparent activation energy is 21.6 kJ/mol; dissolution rate is found to be 0.23 order with respect to
disc rotation speed) where mass transfer control from surface is present.
Keywords: Gold leaching, thiourea, thiocyanate, ferric sulfate, synergistic effect, rotating disc,
dissolution kinetics.
ON A TECHNIQUE OF PREPARATION OF MONOLITHIC FILMS BASED ON
REACTOR POWDERS OF ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE
I.N. Mezheumov1, A.A. Pogudkina1, S.D. Khizhnyk1, A.I. Ivanova1, G.I. Markin1, V.P.
Galitsyn2, P.M. Pakhomov1
1
2
Tver State University
Research Institute of Synthetic Fiber
A special cell (a press form) for performing compaction and monolithization of the reactor powders
(RP) of ultra-high molecular weight polyethylene (UHMWPE) in a wide range of pressure and
temperature is constructed. Effects of the applied pressure on compaction of UHMWPE reactor
powder and temperature on the monolithization process are studied by scanning electron
microscopy (SEM) and FTIR spectroscopy. It is established that at room temperature and under a
pressure of 137 MPa during 15 min the stable pellets from RP are formed and compaction process
is finished. Optimal temperature range for monolithization of the compacted UHMWPE RP pellets
is 135 – 140 °С.
Keywords: reactor powder of ultra-high molecular weight polyethylene, compaction,
monolithization, scanning electron microscopy (SEM), FTIR spectroscopy
EFFECT OF METAL CHLORIDES AND TEMPERATURE
ON VISCOUS PROPERTIES OF CYSTEINE – SILVER IONS BASED HYDROGELS
Y.V. Andrianova, S.D. Khizhnyak, P.M. Pakhomov
Tver State University
Gels based on low concentration aqueous solutions of L-cysteine and silver nitrate are prepared by
introducing chlorides of various metals which induce gelation. Self-organization in the systems in
dependence on temperature and type of metal cations is investigated by means of viscometry.
Keywords: low-concentration solution, L-cysteine, silver nitrate, metal chloride, self-organization,
supramolecular hydrogel.
GRAPH MODEL CALCULATION HEAT OF VAPORIZATION AND THE
NORMAL BOILING POINT OF ALKYNE С2H2 – С10H18
D. Yu. Nilov, Yu. G. Papulov
Tver' State University
Department of Physical chemistry
For the first time formed a homologous series of alkynes C10H18. On the basis of the similarity of
subgraphs in molecular graphs homologous series of alkynes CnH2n-2 was obtained 9-constant additive
scheme of calculation of their physico-chemical properties. Identified two linear dependence.
According to the formula obtained numerical calculations heats of vaporization Hvap and normal
boiling point Tb 303 alkynes C2H2-C10H18 not studied experimentally.
Keywords: additive schemes, alkynes, the heat of vaporization, normal boiling point, steam rooms
and multiple non-bonded interactions, graf.
K.A. ANDRIANOV (1904 - 1978)
(On the 110-th anniversary)
Yu.G. Papulov1, M.G. Vinogradova1, A.S. Levina2
Tver State University
Department of physical chemistry
2
Department of organic chemistry
1
In connection with 110-th anniversary of Kuzma Andrianov, a brief outline of his biography
(including the Tver region) is presented.
Keywords:, Kuzma Andrianov, Tver University, organosilicon compounds.