Key words: carbon dioxide, polyacrylonitrile, itaconic acid, polymerization, particles
Ternary copolymers of acrylonitrile with methylacrylate and itaconic acids and with
derivatives of the latter — monomethyl ester (MME), monoethyl ester (MEE),
monoamide, mono-n-octylamide, are synthesized in supercritical carbon dioxide
medium. The morphology of the obtained copolymers is investigated using scanning
electron microscopy. Copolymers with itaconic acid, its MME and MEE form regular
particles of about 1 μm size with no addition of any stabilizer.
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7.0.100-2018
Morphology of acrylonitrile copolymers with methylacrylate and itaconic acid, as well as with its derivatives, obtained in supercritical carbon dioxide media / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 1. – С. 4-11. - DOI:
En
Morphology of acrylonitrile copolymers with methylacrylate and itaconic acid, as well as with its derivatives, obtained in supercritical carbon dioxide media. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 4-11 (2014). https://doi.org/
Key words: liptobiolith coal, supercritical water, liquefaction, desulfurization, kinetics and mechanisms of reactions
Liquefaction of liptobiolith coal in steam and supercritical water (SCW) flow at
constant increase of temperature from 300 up to 470 °C is studied. Temperature
dependencies of the yield of liquid and volatile products and apparent kinetic parameters
of the process are obtained. The yields of oil, resin, asphaltene and volatile products are
estimated as 23.2, 16.1, 5.1 and 14.1% of the coal organic matter (COM), respectively.
Participation of water molecules in thermochemical transformations of COM resulted
in the 13.2% wt. increase of oxygen amount in the conversion products and residue.
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Liquefaction of liptobiolith coal in supercritical water flow under non-isothermal conditions / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 1. – С. 12-28. - DOI:
TRANSLIT
Ozhizhenie liptobiolitovogo uglya v potoke sverhkriticheskoj vody v neizotermicheskih usloviyah / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 1. – S. 12-28. - DOI:
En
Liquefaction of liptobiolith coal in supercritical water flow under non-isothermal conditions. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 12-28 (2014). https://doi.org/
Key words: supercritical carbon dioxide, ultrahigh molecular weight polyethylene, organometallic precursor, modification, nanoindentation, tribology characteristics, friction coefficient
Microstructure and mechanical properties of ultrahigh molecular weight polyethylene
(UHMWPE) containing metallic silver nanoparticles introduced via impregnation
with Ag-containing precursor in supercritical carbon dioxide are studied. The
nanoindentation experiments showed that the elastic modulus of silver-containing
composites increases by 40—50% compared to the initial UHMWPE samples, while
the hardness of modified samples remains largely unchanged. Measured values of friction
coefficients for the initial and modified polymers are comparable at loads ranging
from 50 to 400 N.
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Structure and properties of ultrahigh molecular weight polyethylene containing silver nanoparticles / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 1. – С. 29-39. - DOI:
TRANSLIT
Struktura i svojstva sverhvysokomolekulyarnogo polietilena, soderzhashchego nanochasticy serebra / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 1. – S. 29-39. - DOI:
En
Structure and properties of ultrahigh molecular weight polyethylene containing silver nanoparticles. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 29-39 (2014). https://doi.org/
Key words: oxidation in supercritical water, waste water treatment, cellulose production, coagulation, flocculation
The method of oxidative waste water (WW) treatment in the supercritical conditions
(SC) is considered. It is demonstrated that the values of water parameters required
for the downstream biological purification are accessible if coagulation-flocculation
treatment of WW on the first stage is combined with oxidation in the SC on the
second stage. The necessity of such combination is caused by low degree of lignin
degradation in the conditions of oxidative treatment (400 °C, 24 MPa,
Н2О2 as oxidant).
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Oxidative treatment of waste water formed during cellulose production from rape straw in supercritical conditions / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 1. – С. 40-47. - DOI:
TRANSLIT
Ochistka stochnyh vod proizvodstva cellyulozy iz solomy rapsa okisleniem v sverhkriticheskoj vodnoj srede / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 1. – S. 40-47. - DOI:
En
Oxidative treatment of waste water formed during cellulose production from rape straw in supercritical conditions. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 40-47 (2014). https://doi.org/
Key words: photochromism, spirocompounds, SCF impregnation, luminescence, electron-donor compounds
Aromatic electron-donor compounds (EDC) (such as toluene and dibutyl phthalate)
are found to affect the content of photochromic spiroantrooxazine (SAO) and to
control the ratio of its colored forms (B and Bx) introduced into thermoplastic
polymeric matrixes (e.g. polyvinylchloride and F-42 fluoroplast) using the supercritical
fluid impregnation (SCFI). The presence of EDC in impregnated polymers induces
the reciprocal transformations of the SAO colored form B and Bx and
increases the rate their «dark» bleaching.
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Effects of electron-donor compounds on electron states of spiroantrooxazine incorporated into thermoplastic polymers by supercritical fluid impregnation / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 1. – С. 48-54. - DOI:
TRANSLIT
Vliyanie elektronodonornyh soedinenij na elektronnye formy spiroantrooksazina, vvedennogo v termoplastichnye polimery metodom sverhkriticheskoj flyuidnoj impregnacii / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 1. – S. 48-54. - DOI:
En
Effects of electron-donor compounds on electron states of spiroantrooxazine incorporated into thermoplastic polymers by supercritical fluid impregnation. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 48-54 (2014). https://doi.org/
Key words: supercritical fluid extraction, liquid and/or supercritical carbon dioxide, spent nuclear fuel reprocessing, uranium, fission products, complexation, tributyl phosphate, aqueous ferric nitrate solution
The behavior of uranium and simulators of fission products during the reprocessing
of a model spent nuclear fuel in subacidic ferric nitrate solution using supercritical
carbon dioxide containing tributyl phosphate (TBP) is studied. A quantitative isolation
of uranium from the ferric nitrate solution simultaneously with its separation from
the present fission products can be reached in these conditions. Isolation of uranium
from the TBP phase was performed by its back extraction by water hydrogen peroxide
solution simultaneously with preci pitation in the form of uranium peroxide. A high
efficiency of uranium purification from all fission products is achieved, which allows
one to reuse uranium in a nuclear fuel cycle.
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Behavior of uranium and fission products during the reprocessing of model spent nuclear fuel in ferric nitrate solutions in the presence of supercritical carbon dioxide containing tributyl phosphate / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 1. – С. 55-61. - DOI:
TRANSLIT
Povedenie urana i produktov deleniya pri pererabotke otrabotavshego yadernogo topliva v rastvore nitrata zheleza(III) v prisutstvii sverhkriticheskogo dioksida ugleroda, soderzhashchego tributilfosfat / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 1. – S. 55-61. - DOI:
En
Behavior of uranium and fission products during the reprocessing of model spent nuclear fuel in ferric nitrate solutions in the presence of supercritical carbon dioxide containing tributyl phosphate. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 55-61 (2014). https://doi.org/
Key words: asphaltite, supercritical water, aluminum, hydrogenation, desulfurization
The conversion of asphaltite (gross-formula
CH1.23N0.017S0.037O0.01) in supercritical water
(SCW) flow at 400 °C and 30 MPa with and without addition of aluminum shavings is
investigated. Composition and amount of products and insoluble conversion residue
are determined by means of liquid-adsorption chromatography, elemental analysis, IR
and NMR 1H spectroscopy, mass spectrometry and gas chromatography/mass spectrometry.
It is found out that SCW not only dissolves asphaltite components, but it
participates in redox reactions. Hydrogen and heat evolution during the aluminum
oxidation by SCW provide for in situ hydrogenation of asphaltite, increase the fraction
of aromatic and polyaromatic compounds in liquid products and decrease the yield of
insoluble conversion residue from 44.5 to 11.3 %. If aluminum is added, the degree of
asphaltite desulfurization, as a result of sulfur removal in the form of H2S, increases by
more than 3.5 times.
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Coupled processes of aluminum oxidation and asphaltite hydrogenation in supercritical water flow / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 1. – С. 62-79. - DOI:
TRANSLIT
Sopryazhennye processy okisleniya alyuminiya i gidrirovaniya asfal'tita v potoke sverhkriticheskoj vody / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 1. – S. 62-79. - DOI:
En
Coupled processes of aluminum oxidation and asphaltite hydrogenation in supercritical water flow. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 62-79 (2014). https://doi.org/
Key words: inactivation, Escherichia coli, CO2, tetrafluoroethane, ethanol
The kinetics of E. coli bacteria inactivation is studied in compressed carbon dioxide
and tetrafluoroethane with and without ethanol addition. The possibility of decreasing
the number of survived cells by 7 orders of magnitude when up to 5% vol. of ethanol
is added to the main fluid is demonstrated.
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Effect of CO2, tetrafluoroethane and their mixtures with ethanol on E. Coli cells / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 1. – С. 80-85. - DOI:
TRANSLIT
Dejstvie CO2, tetraftoretana i ih smesej s etanolom na kletki E. Coli / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 1. – S. 80-85. - DOI:
En
Effect of CO2, tetrafluoroethane and their mixtures with ethanol on E. Coli cells. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 80-85 (2014). https://doi.org/
Key words: atomic force microscopy, cantilevers, surface cleaning, supercritical carbon dioxide
A new method for gentle cleaning of cantilevers used in the atomic force microscopy
(AFM) in supercritical carbon dioxide (SC-CO2) is suggested. Artificial organic
pollutant (polyethylmetacrilate) can be removed by treatment in SC-CO2 without any
damage of the sample structure and operational characteristics. Using Raman
spectroscopy and scanning electron microscopy a complete removal of the pollutant
from the sample surface is proven. After treatment in SC-CO2 no bands attributed to
the organic pollutant are present in Raman spectra. The images of calibration grids
obtained using the SC-CO2 treated cantilevers are more sharp and clear compared to
those obtained using the same cantilevers in «as obtained» state without any treatment;
the number of artifact features on the images obtained using the SC-CO2 treated
cantilevers is also lower.
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Cleaning of cantilevers for atomic force microscopy in supercritical carbon dioxide / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 1. – С. 86-94. - DOI:
TRANSLIT
Ochistka zondov dlya atomno-silovoj mikroskopii v sverhkriticheskom diokside ugleroda / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 1. – S. 86-94. - DOI:
En
Cleaning of cantilevers for atomic force microscopy in supercritical carbon dioxide. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 86-94 (2014). https://doi.org/
Key words: supercritical carbon dioxide, photosensitized oxidation, anthracene, porphyrins
A photosensitized oxidation of anthracene and cholesterol in supercritical carbon
dioxide (SC-CO2) in the presence of fluorinated tetraphenylporphyrins (FTPP)
containing hydrocarbon substituents with different chain lengths (characterized by
the number of carbon atoms n) in para-position of the phenyl rings as sensitizers is
carried out for the first time. The rate of such process in SC-CO2 is much higher
than in conventional organic solvents, in chloroform in particular. The value of the
apparent rate constant of anthracene photooxidation keff increases with increasing n
due to a higher probability of the formation of the complex between the substrate and
a more spatially extended FTPP molecule at increasing n number. Such complex can be
an intermediate in the formation of anthraquinone — the only product in the
photooxidation of anthracene in SC-CO2.
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Activity of fluorine-substituted tetraphenylporphyrins in the photosensitized oxidation of organic substrates in supercritical carbon dioxide / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 2. – С. 4-10. - DOI:
TRANSLIT
Aktivnost' ftorzameshchennyh tetrafenilporfirinov v reakciyah fotosensibilizirovannogo okisleniya organicheskih substratov v srede sverhkriticheskogo dioksida ugleroda / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 2. – S. 4-10. - DOI:
En
Activity of fluorine-substituted tetraphenylporphyrins in the photosensitized oxidation of organic substrates in supercritical carbon dioxide. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 4-10 (2014). https://doi.org/
Key words: supercritical extraction, garlic, carbon dioxide, thiosulfinates, high performance liquid chromatography (HPLC)
For the first time a detailed investigation of destruction of thiosulfinates from garlic
supercritical extract in solvents of different polarity (water, ethyl alcohol, acetonitrile,
dimethylsulfoxide, methylene chloride and hexane) is performed. Qualitative and
quantitative analysis of thiosulfinate destruction products is carried out. A new HPLC
analytical procedure is developed that offers a possibility to determine both initial
thiosulfinates, as well as their sulfur-containing destruction products. As a result, a way
of directing the thiosulfinates destruction process to the formation of desired substances
(ajoenes, dithiines, trisulfides, etc.) is suggested. The obtained results may be used for
studying medico-biological applications of garlic products, and also for their
manufacturing, storage and analysis.
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Stability of thiosulfinates from garlic (Allium Sativum L.) supercritical extract in polar and nonpolar solvents / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 2. – С. 11-26. - DOI:
TRANSLIT
Ustojchivost' tiosul'finatov sverhkriticheskih ekstraktov chesnoka (Allium Sativum L.) v polyarnyh i nepolyarnyh rastvoritelyah / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 2. – S. 11-26. - DOI:
En
Stability of thiosulfinates from garlic (Allium Sativum L.) supercritical extract in polar and nonpolar solvents. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 11-26 (2014). https://doi.org/
Key words: fibrillar porous media, subcritical liquid, supercritical fluid, bulk modulus, relaxation of deformations, speckle correlometry
Isothermal relaxation of deformations in the fibrillar porous layers saturated by
subcritical or supercritical carbon dioxide is studied using full-field speckle correlometry
at various temperatures. The relaxation of deformations is caused by the transition of
the «porous layer — fluid» system from one equilibrium state to another as a result of
partial drop of pressure. It is found that the relaxation time reaches its maximal value
in the vicinity of the critical point and rapidly falls down with the increasing deviation
of the system temperature from the critical temperature of carbon dioxide. Possible
mechanisms of hydrodynamic relaxation of the fluid density inside the layer and
viscoelastic relaxation of the porous matrix are discussed. It is shown that the
experimentally observed slow relaxation of the system is governed by the viscoelastic
relaxation of the porous matrix in the condition of equal values of the fluid density
inside the layer and outside it.
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Relaxation of fibrillar porous media saturated with carbon dioxide in the vicinity of its critical point / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 2. – С. 27-39. - DOI:
TRANSLIT
Relaksaciya deformacij v fibrillyarnyh poristyh sredah, nasyshchennyh dioksidom ugleroda vblizi kriticheskoj tochki / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 2. – S. 27-39. - DOI:
En
Relaxation of fibrillar porous media saturated with carbon dioxide in the vicinity of its critical point. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 27-39 (2014). https://doi.org/
Key words: microscopic dynamics of liquids and gases, superhigh pressures, fluids viscosity, supercritical technologies
Up to date supercritical technologies use the fluids like CO2, H2O etc. at temperatures
and pressures close to the corresponding critical points. It is not clear up to date if
the near-critical fluctuations are important for the solubility processes and chemical
reactions in the fluids. Meanwhile recently we have shown that at the temperatures and
pressures much higher than the critical ones there are qualitative changes of almost
all fluid properties. The paper briefly summarizes the last results of the search and
study of P,T-parameters of the changes of dynamics in supercritical fluids. We found
that actually these parameters correspond to the narrow band — «Frenkel line». The
crossing this line during temperature increase corresponds to the disappearance of
the shear rigidity of a fluid at all available frequencies. Thus Frenkel line can be considered
as a boundary between a liquid and a dense gas at superhigh pressures far from the
critical point. Very recently we have proposed very simple and rigorous criterion to
find Frenkel line position based on the analysis of autocorrelation function of particle
velocities. We plan to use the data of the Frenkel line parameters for real fluids to push
supercritical technologies to the superhigh pressure region far from the critical point.
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Frenkel line and supercritical technologies / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 2. – С. 40-50. - DOI:
TRANSLIT
Liniya Frenkelya i sverhkriticheskie tekhnologii / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 2. – S. 40-50. - DOI:
En
Frenkel line and supercritical technologies. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 40-50 (2014). https://doi.org/
Key words: birch tree barks, CO2-extract, biologically active substances, betulin, thermodynamic characteristics, physico-chemical properties
Supercritical fluid extraction with carbon dioxide is used to extract biologically active
substances from the bark of the birch tree (Betula pendula). Phase and relaxation
transitions (melting, crystallization, evaporation, vitrification) in these samples are
studied using differential thermal analysis between 80 and 550 K. Betulin was isolated
and purified from CO2-extracts of birch bark. Its heat capacity in the temperature
range of 80—350 K, as well as temperatures of phase and relaxation transitions and
thermochemical characteristics (standard enthalpy of combustion and formation)
are measured.
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Physico-chemical properties of betulin and CO2-extract from the birch tree bark / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 2. – С. 51-63. - DOI:
TRANSLIT
Fiziko-himicheskie svojstva betulina i SO2-ekstrakta iz kory berezy / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 2. – S. 51-63. - DOI:
En
Physico-chemical properties of betulin and CO2-extract from the birch tree bark. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 51-63 (2014). https://doi.org/
Key words: antidote against carbon monoxide, acizol, supercritical carbon dioxide, controllable drug release
Encapsulation of pharmaceutical grade acizol into bioresorbable D,L-polylactide and
polylactoglycolide microparticles using supercritical carbon dioxide is studied. An
effective way for fabrication of polymer fine powders (mean particle size ca. 10—20
μm) containing up to 20 % wt. of bioactive component without any organic solvent is
suggested. Raman spectroscopy with spatial resolution is employed to analyze the
distribution of acizol throughout the volume of individual polymer microparticles
and kinetics of its release into the saline solution. A steep release (ca. 40—80% of the
total amount of encapsulated substance) from the samples under study during the
first hour followed by gradual, almost linear release between fourth and fourteenth
days of experiment with cumulative outcome of up to 100% is observed.
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Supercritical fluid encapsulation of acizol into aliphatic polyether microparticles / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 2. – С. 64-73. - DOI:
TRANSLIT
Sverhkriticheskaya flyuidnaya inkapsulyaciya acizola v mikrochasticy alifaticheskih poliefirov / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 2. – S. 64-73. - DOI:
En
Supercritical fluid encapsulation of acizol into aliphatic polyether microparticles. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 64-73 (2014). https://doi.org/
Key words: critical fluid, gravity field, fluctuation structure
The mechanism of the physical processes underlying the wide practical use of the
unique properties of the substance in critical condition — critical fluid (CF) in the
up-to-date technologies. In view of the fluctuation theory of phase transitions (FTPT)
these mechanisms are certainly related to fluctuation structure of critical fluid defining
its equilibrium and kinetic properties. Such structural characteristics of critical fluid
are: the value of the correlation radius Rc system, the number of fluctuations of the
order parameter
Nф∼Rc-3
in one mole of critical fluid, the size of the fluctuation part of the thermodynamic potential
FФ*=NфkTк/(PкVк)=C0Rc-3.
In the work of these
structural characteristics of critical fluid have been investigated by experimental data
of the gravitational effect: high-altitude and temperature dependences of dependences
of scattered light intensity I(z, t) in heterogeneous substance n-pentane near the
critical temperature of evaporation. Using these results and literature data on the processes
of formation Al2O3 nanoparticles using CF-H2O, speeds of distribution of molecules of
substance are estimated – vf ≈ 106 cm/s in the formation and decay of fluctuations of
the order parameter. It has been concluded, that such high speed of molecules of a
substance due to the unique properties of the critical fluid in their practical use in a
number of technological processes.
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Critical fluid under gravity field of the earth / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 2. – С. 74-82. - DOI:
TRANSLIT
Kriticheskij flyuid v pole gravitacii zemli / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 2. – S. 74-82. - DOI:
En
Critical fluid under gravity field of the earth. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 74-82 (2014). https://doi.org/
Key words: masters training, educational program, competence approach, supercritical fluid technologies, processing of hydrocarbon feedstocks
In 2013, at the Department of Heat Engineering of the Kazan National Research
Technological University a master course program «Supercritical fluid technologies
for the hydrocarbon feedstock deep refining processes» with international partici pation
was developed. This educational program that involves the universities of Astana (Kazakh
National Al-Farabi University) and Paris (Galileo University Paris-XIII) is scheduled
for implementation in academic year 2014/2015. The «Supercritical fluid technologies
for the hydrocarbon feedstock deep refining processes» is relevant and innovative
for the Russian Federation in general. It is of particular interest for the Republic of
Tatarstan, where 127 oil fields uniting more than 3000 deposits are discovered, and the
production and processing of hydrocarbon resources is a priority task. The program is
based on the competence approach. It includes a list of target competences, a plan of
their development and a standard content of student research work.
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«Supercritical fluid technologies for hydrocarbon feedstock deep processing» master course program at the Department of Heat Engineering in Kazan National Research Technological University / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 2. – С. 83-92. - DOI:
TRANSLIT
Obrazovatel'naya programma podgotovki magistrov na kafedre «Teoreticheskie osnovy teplotekhniki» Kazanskogo nacional'nogo issledovatel'skogo tekhnologicheskogo universiteta po napravleniyu «Sverhkriticheskie flyuidnye tekhnologii processov glubokoj pererabotki uglevodorodnogo syr'ya» / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 2. – S. 83-92. - DOI:
En
«Supercritical fluid technologies for hydrocarbon feedstock deep processing» master course program at the Department of Heat Engineering in Kazan National Research Technological University. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 83-92 (2014). https://doi.org/
Xenogenic bone matrix processed with supercritical carbon dioxide as potential osteoplastic material
Key words: supercritical extraction, porosity, carbon dioxide, xenogenic matrix, osteoplastic materials
Multistage environmentally benign method of xenogenic bone matrix processing in
sub- and supercritical media is developed. This method provides with a fast matrix
deli pidation in supercritical carbon dioxide, deproteinization by treatment with 3%
hydrogen peroxide solution followed by washing in subcritical water for removal of
polar substances. The final treatment with supercritical carbon dioxide serves to remove
residual non-polar components. A method to control the porosity of xenogenic bone
matrix on several stages of purification is suggested. Preliminary data indicate that cell
test system based on the allogenic osteoid cell line Th-1 can be used for evaluation of
primary adhesion and cell proliferation on the surface of purified bone matrix.
doi:
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ГОСТ
7.0.100-2018
Xenogenic bone matrix processed with supercritical carbon dioxide as potential osteoplastic material / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 3. – С. 4-12. - DOI:
TRANSLIT
Ksenogennyj kostnyj matriks, obrabotannyj sverhkriticheskim dioksidom ugleroda, kak potencial'nyj osteoplasticheskij material / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 3. – S. 4-12. - DOI:
En
Xenogenic bone matrix processed with supercritical carbon dioxide as potential osteoplastic material. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 4-12 (2014). https://doi.org/
Key words: isochoric heat capacity, adiabatic calorimeter, phase transition, «water—n-hexane» system
The isochoric heat capacity of «n-hexane — water» system is studied using the adiabatic
calorimeter in the range of water mole fraction between 0.256 and 0.935 at 300—600 K
in a wide range of densities. The obtained experimental critical curves of liquid—
vapor phase equilibrium are described by an equation that corresponds to the theory
of critical phenomena.
doi:
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ГОСТ
7.0.100-2018
Critical «liquid—gas»-type phenomena in n-hexane in the presence of liquid phase of water / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2014. – Т. 9. – № 3. – С. 13-20. - DOI:
TRANSLIT
Kriticheskie yavleniya zhidkost'—gaz n-geksana v prisutstvii zhidkoj fazy vody / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2014. – Т. 9. – № 3. – S. 13-20. - DOI:
En
Critical «liquid—gas»-type phenomena in n-hexane in the presence of liquid phase of water. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 13-20 (2014). https://doi.org/