Features of crystallization of multicomponent solutions: dipeptide, its salt and potassium carbonate

CrystEngComm ◽  
2021 ◽  
Author(s):  
Alexander Ivanovitch Loskutov ◽  
Boris Lokshin ◽  
Nellya M Sazonova ◽  
Nestor Solis Pinargote ◽  
Vladimir Vladimir vysotzkij ◽  
...  
Keyword(s):  
Potassium Carbonate ◽  
Colloidal Dispersions ◽  
Equilibrium Crystallization ◽  
Multicomponent Solutions ◽  
First Time ◽  
Non Equilibrium

For the first time, all stages of non-equilibrium crystallization of multicomponent peptide solutions have been studied in detail, starting with the formation of colloidal dispersions and ending with the growth...

scholarly journals Performance of Turbulence Models and Near-Wall Treatments in Discrete Jet Film Cooling Simulations

1998 ◽  
Author(s):  
Jeffrey D. Ferguson ◽  
Dibbon K. Walters ◽  
James H. Leylek
Keyword(s):  
Experimental Data ◽  
Film Cooling ◽  
Turbulence Models ◽  
Viscous Sublayer ◽  
Reynolds Stress Model ◽  
Quality Data ◽  
Wall Functions ◽  
First Time ◽  
Near Wall ◽  
Non Equilibrium

For the first time in the open literature, code validation quality data and a well-tested, highly reliable computational methodology are employed to isolate the true performance of seven turbulence treatments in discrete jet film cooling. The present research examines both computational and high quality experimental data for two length-to-diameter ratios of a row of streamwise injected, cylindrical film holes. These two cases are used to document the performance of the following turbulence treatments: 1) standard k-ε model with generalized wall functions; 2) standard k-ε model with non-equilibrium wall functions: 3) Renormalization Group k-ε (RNG) model with generalized wall functions; 4) RNG model with non-equilibrium wall functions: 51 standard k-ε model with two-layer turbulence wall treatment; 6) Reynolds Stress Model (RSM) with generalized wall functions; and 7) RSM with non-equilibrium wall functions. Overall, the standard k-ε turbulence model with the two-layer near-wall treatment, which resolves the viscous sublayer, produces results that are more consistent with experimental data.

scholarly journals NEW PHARMACOLOGICALLY ACTIVE COMPOUNDS BASED ON 5-HYDROXY-7-METHOXY-2-PHENYLCHROMAN-4-ONE

2021 ◽  
Vol 3 ◽  
pp. 119-127
Author(s):  
G.M. Baisarov ◽  
◽  
S.M. Adekenov ◽  
Keyword(s):  
Nmr Spectroscopy ◽  
13C Nmr ◽  
Potassium Carbonate ◽  
13C Nmr Spectroscopy ◽  
1H And 13C Nmr ◽  
Pharmacologically Active ◽  
Pharmacologically Active Compounds ◽  
First Time

The reaction of 5-hydroxy-7-methoxy-2-phenylchroman-4-one with dibromoalkanes in acetone in the presence of potassium carbonate proceeds according to the Michael’s retro-reaction O-alkylation and leads to the formation of the corresponding 2-(bromo-alkoxy) chalcones. The structure of the synthesized compounds was confirmed by IR-, 1H- and 13C-NMR spectroscopy. The cytotoxic, hepatoprotective and anti-inflammatory effects of chalcone derivatives (2-3) were studied for the first time in vitro and in vivo.

Role of the interfaces and the charge of a molecule in the non-equilibrium crystallization of dipeptide nanomaterials onto solid substrates

CrystEngComm ◽  
2018 ◽  
Vol 20 (47) ◽  
pp. 7688-7699 ◽  
Author(s):  
Alexander I. Loskutov ◽  
Boris V. Lokshin ◽  
Tatiana A. Gudasheva ◽  
Vadim B. Oshurko ◽  
Nestor Solis Pinargote ◽  
...  
Keyword(s):  
Critical Role ◽  
Structure And Properties ◽  
Net Charge ◽  
Equilibrium Crystallization ◽  
Solid Substrates ◽  
Non Equilibrium

A critical role of the net charge of molecule and nature of interfaces on the structure and properties of crystallized dipeptide layers was established.

scholarly journals Non-equilibrium thermodynamics and stoichiography in studying solid-phase preparation processes of functional materials

2019 ◽  
Vol 488 (3) ◽  
pp. 272-276
Author(s):  
V. V. Malakhov ◽  
V. N. Parmon
Keyword(s):  
Phase Transformations ◽  
Solid Phase ◽  
Functional Materials ◽  
Variable Composition ◽  
Propane Ammoxidation ◽  
Equilibrium Thermodynamics ◽  
Amorphous Phases ◽  
First Time ◽  
Non Equilibrium

The application of the general principles of the non-equilibrium thermodynamics and stoichiography allows obtaining novel information on the solid-phase transformations happening in multielement and heterophase substances and materials. Without the solid-phase standards, the use of stoichiography allows detecting, identifying and quantitative determining known and unknown crystalline and amorphous phases being of constant or variable composition. For the first time, reliable results concerning evolution of solid products during preparation of the Mo-V-Te-Nb-O catalyst of propane ammoxidation are presented.

CONTRIBUTION TO THE STUDY OF 1,1-DIPHENYLINDAN AND ITS DERIVATIVES. SYNTHESIS OF 1,1-DIPHENYL-3-INDANACETIC AND 1,1-DIPHENYL-3-INDENEACETIC ACIDS

1944 ◽  
Vol 22b (2) ◽  
pp. 32-44
Author(s):  
Paul E. Gagnon ◽  
L. Gravel ◽  
Louis-Philippe Amiot
Keyword(s):  
Aqueous Solutions ◽  
Potassium Carbonate ◽  
Silver Salt ◽  
The Other ◽  
Reformatsky Reaction ◽  
New Methods ◽  
Sodium Ethyl ◽  
Ethyl Malonate ◽  
First Time ◽  
Derivatives Of

1,1-Diphenylindan was treated with one molecule of bromine. It yielded a monobromide, which was condensed with methyl and ethyl alcohols, piperidine, p-toluidine, and aniline. With aqueous solutions of potassium carbonate, the monobromide directly gave rise to 1,1-diphenylindene and small quantities of diphenylindanyl ether.The condensation of the monobromide with sodium ethyl malonate yielded ethyl 1,1-diphenyl-3-indanmalonate from which 1,1-diphenyl-3-indanmalonic and 1-1-diphenyl-3-indanacetic acids were prepared. A few derivatives of these acids were also obtained.To establish the constitution of 1,1-diphenyl-3-indanacetic acid and, hence, that of the monobromide and of the other compounds, this acid was prepared directly from 3,3-diphenyl-1-indanone by a Reformatsky reaction with ethyl bromoacetate.The method of preparation of 1,1-diphenylindan has been improved, 1,1-diphenylindene has been obtained by new methods, and the following compounds are described, as far as the authors are aware, for the first time: 3-bromo-1,1-diphenylindan, 3-methoxy-1,1-diphenylindan, 3-ethoxy-1,1-diphenylindan, 3-N-piperidyl-1,1-diphenylindan, N-phenyl-1,1-diphenyl-3-indanamine, N-p-tolyl-1,1-diphenyl-3-indanamine, ethyl 1,1-diphenyl-3-indanmalonate, 1,1-diphenyl-3-indanmalonic acid, 1,1-diphenyl-3-indanmalonic acid p-nitrobenzyl ester, silver salt of 1,1-diphenyl-3-indanmalonic acid, 1,1-diphenyl-3-indanacetic acid, 1,1-diphenyl-3-indanacetic acid p-nitrobenzyl ester, silver salt of 1,1-diphenyl-3-indanacetic acid, 1,1-diphenyl-3-indanacetanilide, 1,1-diphenyl-3-indanacetamide, 1,1-diphenyl-3-indanacetonitrile, 1,1-diphenyl-3-indanethylamine hydrochloride, ethyl 3-hydroxy-1,1-diphenyl-3-indanacetate, ethyl 1,1-diphenyl-3-indeneacetate, 1,1-diphenyl-3-indeneacetic acid, silver salt of 1,1-diphenyl-3-indeneacetic acid, 1,1-diphenyl-3-indeneacetic acid p-nitrobenzyl ester, ethyl 1,1-diphenyl-3-indanacetate.

Non-equilibrium crystallization-aggregation mechanism of a-C:H layer in a-C:H/a-Se complex films

1990 ◽  
Vol 9 (12) ◽  
pp. 1371-1375 ◽  
Author(s):  
Da-Ren He ◽  
Xiuyan Ji ◽  
Ruo-Bao Wang ◽  
Qihai Liu ◽  
Wangdi Wang ◽  
...  
Keyword(s):  
Aggregation Mechanism ◽  
Equilibrium Crystallization ◽  
Non Equilibrium

Syntheses of Tabular Cobalt Ferrite Crystal Using Non-Equilibrium Crystallization Conditions

2013 ◽  
Vol 704 ◽  
pp. 161-166
Author(s):  
Gang Jian ◽  
Hui Shao ◽  
Qing Xian Hu ◽  
Sheng Lu
Keyword(s):  
Heat Treatment ◽  
Particle Size ◽  
Heat Treatment Temperature ◽  
Cobalt Ferrite ◽  
Treatment Temperature ◽  
Equilibrium Crystallization ◽  
Primary Particles ◽  
Crystallization Conditions ◽  
Crystallization Stage ◽  
Non Equilibrium

Cobalt ferrite CoFe2O4tabular crystals were synthesized via two-step coprecipitation using non-equilibrium crystallization conditions by supplying a solution of CoCl26H2O and FeCl36H2O and a solution containing NaOH at a later crystallization stage. Mean particle size of ~16.5 nm CoFe2O4primary particles synthesized by coprecipitation showed non-oriented structure. Effect of heat treatment temperature on the microstructures of the final CoFe2O4crystal was examined, orderly arranged plate-like tabular CoFe2O4crystals were formed under calcination at 800 °C. Magnetic hyspersis loops measured at 300 and 5 K indicated the anisotropy in the tabular crystals.

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