Key words: ammonium glycyrrhizinate, glycyram, glycyrrhizic acid, glycyrrhetinic acid, monoglycoside of glycyrrhetinic acid, electrospray ionization mass spectrometry, HPLC-MS, subcritical water
A method for synthesis of glycyrrhetinic acid monoglycoside by hydrolysis of glycyrrhizic acid in subcritical water at temperatures between 100 and 300 °C is developed. The maximum yield of the target product is obtained at 160 °C.
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ГОСТ
7.0.100-2018
Synthesis of Glycyrrhetinic Acid Monoglycoside by Hydrolysis of Glycyrrhizic Acid in Subcritical Water / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2015. – Т. 10. – № 1. – С. 3-8. - DOI:
TRANSLIT
Poluchenie monoglikozida glicirretinovoj kisloty gidrolizom glicirrizinovoj kisloty v subkriticheskoj vode / – Tekst : neposredstvennyj // Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2015. – Т. 10. – № 1. – S. 3-8. - DOI:
En
Synthesis of Glycyrrhetinic Acid Monoglycoside by Hydrolysis of Glycyrrhizic Acid in Subcritical Water. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 3-8 (2015). https://doi.org/
Key words: polymer nanocomposite, supercritical carbon dioxide, quantum dots, photoluminescence, polytetrafluoroethylene, low-density polyethylene, diffusion embedding
Luminescence of composites based on quantum dots CdSe embedded into low-density polyethylene (LDPE) and polytetrafluoroethylene (PTFE) powders using supercritical carbon dioxide is studied. It is shown that thermal treatment of the resulting powders in air in the case of LDPE causes the CdSe photoluminescence band shift to shorter wavelengths, but in the case of PTFE — to longer wavelengths with simultaneous decrease of integral luminescence intensity. The behavior of photoluminescence bands under near UV radiation in both cases is determined by photo-oxidation processes on the CdSe nuclei.
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ГОСТ
7.0.100-2018
Luminescence of Nanocomposites Obtained Using SCF Impregnation of Polymer Powders by CdSe Quantum Dots / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2015. – Т. 10. – № 1. – С. 9-18. - DOI:
TRANSLIT
Lyuminescenciya nanokompozitov, poluchennyh metodom SKF impregnacii polimernyh poroshkov kvantovymi tochkami CdSe / – Tekst : neposredstvennyj // Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2015. – Т. 10. – № 1. – S. 9-18. - DOI:
En
Luminescence of Nanocomposites Obtained Using SCF Impregnation of Polymer Powders by CdSe Quantum Dots. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 9-18 (2015). https://doi.org/
Key words: statistical physics, critical phenomena, molecular spectra theory
Careful analysis of CARS-spectroscopy data for carbon dioxide Fermi-dyad shows that critical density variance must not exceed 0.4 and the lifetime of critical density fluctuations is not less than 10 ns. To comprehend the experimental data, the contribution of critical fluctuations to the spectral line width is evaluated taking into consideration their lifetime.
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ГОСТ
7.0.100-2018
Broadening of Carbon Dioxide Vibration Q-Bands by Critical Density Fluctuations / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2015. – Т. 10. – № 1. – С. 19-34. - DOI:
TRANSLIT
Ushirenie kolebatel'nyh Q-polos v spektrah kombinacionnogo rasseyaniya dioksida ugleroda kriticheskimi fluktuaciyami plotnosti / – Tekst : neposredstvennyj // Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2015. – Т. 10. – № 1. – S. 19-34. - DOI:
En
Broadening of Carbon Dioxide Vibration Q-Bands by Critical Density Fluctuations. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 19-34 (2015). https://doi.org/
Key words: temperature, pressure, density, concentration, phase, fluid, equation of state, compressibility factor, reduced parameters
The results of thermal and thermodynamic properties (diagrams of state) calculation
of water-aliphatic alcohol (methanol, ethanol, n-propanol) systems in liquid and vapor
phases, as well as in the state of supercritical fluid are presented. They are based on the
equation of state that represents the compressibility factor as power series of reduced
density (ω = ρ/ρcr) and temperature(t = T/Tcr)
\(Z=\frac{\rho}{RT\rho_m}=1+\sum_{i=1}^{m}\sum_{j=0}^{n_i}\frac{a_{ij}\omega^i}{\tau^j}\)
and describes the experimental р, ρ, Т, х-relations with an
average relative error 1.2%.
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ГОСТ
7.0.100-2018
Thermodinamic Properties of Water—Aliphatic Alcohol Systems in a Wide Range of Parameters / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2015. – Т. 10. – № 1. – С. 35-60. - DOI:
TRANSLIT
Termodinamicheskie svojstva sistem voda—alifaticheskij spirt v shirokom diapazone parametrov sostoyaniya / – Tekst : neposredstvennyj // Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2015. – Т. 10. – № 1. – S. 35-60. - DOI:
En
Thermodinamic Properties of Water—Aliphatic Alcohol Systems in a Wide Range of Parameters. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 35-60 (2015). https://doi.org/
Key words: ethanol, fuels, hydrolysis, gasification, saccharification, supercritical fluids
Publications devoted to the application of supercritical fluids to deep biorefinery of vegetable raw materials for production of wide range of products, such as ethanol, liquid and gaseous fuels, sugars, organic acids, and oils are reviewed and analyzed. The specific features of the supercritical fluid technologies and their advantages in comparison with the existing traditional methods of biorefinery of vegetable raw materials are demonstrated.
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ГОСТ
7.0.100-2018
Supercritical Fluid Technologies for Deep Biorefinery of Vegetable Raw Materials / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2015. – Т. 10. – № 1. – С. 61-69. - DOI:
TRANSLIT
Sverhkriticheskie flyuidnye tekhnologii v glubokoj pererabotke rastitel'nogo syr'ya / – Tekst : neposredstvennyj // Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2015. – Т. 10. – № 1. – S. 61-69. - DOI:
En
Supercritical Fluid Technologies for Deep Biorefinery of Vegetable Raw Materials. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 61-69 (2015). https://doi.org/
Key words: ultrahigh density polyethylene, subcritical water, porosity, implant
The method of subcritical water extraction of NaCl from ultrahigh density polyethylene (UHDPE) samples is developed as a stage in the manufacturing of porous polymer — a promising material for implant production. Optimal process parameters were determined as follows: pressure 250 atm, temperature 120 °С, water flow rate 3 g/min. This method provides with a tenfold reduction of salt extraction time (from 10 to 1 h). The main pore diameter of UHDPE determined by scanning electronic microscopy ranges from 80 to 700 µm.
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ГОСТ
7.0.100-2018
Manufacturing of Porous Ultrahigh Density Polyethylene Using Subcritical Water / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2015. – Т. 10. – № 1. – С. 70-77. - DOI:
TRANSLIT
Ispol'zovanie subkriticheskoj vody v tekhnologii polucheniya poristogo sverhvysokomolekulyarnogo polietilena / – Tekst : neposredstvennyj // Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2015. – Т. 10. – № 1. – S. 70-77. - DOI:
En
Manufacturing of Porous Ultrahigh Density Polyethylene Using Subcritical Water. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 70-77 (2015). https://doi.org/
Key words: phase diagrams, solubility, liquid-liquid immiscibility, critical phenomena
The system LiOH—H2O is characterized by the immiscibility phenomena both in equilibrium with vapor and solid saturated solutions or without solid phase. Solubility of LiOH increases as a result of immiscibility phenomena at ∼355 °С and further increases above this temperature up to the melting point. The immiscibility region (g - l1 - l2) is terminated by the critical phenomena (g = l1 - l2) at ∼390 °С. A separation of liquid phases is observed at elevated pressures (at ∼39 MPa) and temperatures up to 425 °C.
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ГОСТ
7.0.100-2018
Phase Equilibria in the System LiOH—H<sub>2</sub>O at 350—425 °C / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2015. – Т. 10. – № 1. – С. 78-85. - DOI:
TRANSLIT
Fazovye ravnovesiya v sisteme LiOH—H2O pri 350—425 °S / – Tekst : neposredstvennyj // Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2015. – Т. 10. – № 1. – S. 78-85. - DOI:
En
Phase Equilibria in the System LiOH—H<sub>2</sub>O at 350—425 °C. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 78-85 (2015). https://doi.org/