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Online since: July 2021
Authors: Viktoriia E. Kison, Anna N. Popova, Vladimir S. Sukhomlinov, Alexandr S. Mustafaev
As a result of calculations using empirical formulas and mathematical modeling of the processes of interaction of plasma with the components of the internal structure of the plasmatron, the parameters of the stream at the output of the plasmatron and the interaction of this stream with the surface of the alumina melt, the following parameters of the plasmatron were obtained: working gas, type of plasmatron, plasmatron efficiency rate is 70-80 %; efficiency rate of obtaining a melt (the ratio of the energy consumed by the plasmatron in the process of obtaining of 1 kg of alumina melt to the energy required to heat and melt 1 kg of alumina) is 50-60%.
Baranov, Technological Aspects of Preparation of High-Purity Compounds for Sol–Gel and Pyrolytic Synthesis Methods, Glass Physics and Chemistry 34(4) (2008) 515-518
Chemical Analysis: a Series of Monographs on Analytical Chemistry and its Applications, Wiley-Interscience, New York, 1991
Online since: October 2010
Authors: Corina Täubert, Margret Wohlfahrt-Mehrens, Martin Kreis, Walter Schütz, Alberto Varzi
The active material for the negative electrodes was a nano-sized TiO2 rutile (synthesized at the Institute of Inorganic Chemistry I of the University of Ulm, from the group of Prof.
At the same time, because of the flexible 1D structure of the nanotubes, the contact loss between the active particles can be avoided and this can increase the battery life time.
Hüsing (Institute of Inorganic Chemistry I, University of Ulm) for the synthesis of TiO2 rutile.
Online since: July 2006
Authors: Hui Mei, Li Tong Zhang, Lai Fei Cheng, Xin Gang Luan, Yong Dong Xu
It is believed that the accelerated equivalent experiments are satisfied with the compatibility principle, because (1) ES simulates the hot section environments of aero-engines by recurring to the degradation controlled factors which include thermal chemistry factors and stress factors.
Finally, Ωw should be written as follows Ωw = ξ⋅ n(s)⋅ N⋅ ωe (6) It is very hard to build degradation models of all properties because too many properties are involved during the design of thermal structures of aero-engines.
PH2O: 0.05MPa Information acquisition system monitoring and tracking performance evolution process Loading record, temperature distributing, atmospheres record, resistance record, acoustic emission signal acquisition Devices Functions Capabilities Combustion wind tunnel Simulating aero-engine environment temperature:1600ºC, pressure: 0.1MPa speed:1M, nozzle diameter:100mm Ceramic nozzle Suppling stable high temperature gas using temperature:1700ºC using time: 100 hours Loading device Simulating load condition Instron servohydraulic testing system Combustion atmosphere adjustor Adjusting gas constitutes PO2: 0.014MPa, PH2O: 0.01MPa molten salt: 1000ppm Information acquisition subsystem Monitoring performance evolution process Loading record, temperature distributing, atmospheres record, resistance record, acoustic emission signal acquisition Table.3 The environmental parameters in the experiments Thermal chemistry
Online since: October 2014
Authors: A.B. Safronova, V.M. Grishagin
TCCA are characterized by nuclear shell structure.
Besides, silicates on the TCCA surface give great possibilities to modify their surfaces by means of introducing different functional groups and obtaining sorbents with predetermined properties which can be used in different fields of chemistry, medicine, industry.
Hoiblain, Reactions in Polymer Systems, Chemistry,Leningrad, 2007, 303p
Online since: March 2016
Authors: Jan Sieniawski, Marcin Drajewicz, Kamil Dychtoń, Andrzej Gradzik, Przemyslaw Kwolek, Justyna Szydełko
The crystal structure of the corrosion products precipitated onto the specimens were analyzed by using a Rigaku Miniflex II diffractometer, λ = 1.54 Å (Cu Kα radiation).
Rollinson, The chemistry of chromium, molybdenum and tungsten, Pergamon Press, 1975
Müller, Polyoxometalate chemistry: An old field with new dimensions in several disciplines, Angew.
Online since: June 2008
Authors: Bernhard Wielage, Gert Alisch, Matthias Hockauf, Thomas Lampke, Daniela Nickel, Harry Podlesak, Samer Darwich
Phases different in size and chemistry characterize the microstructure of the initial-state CGT6 before the severe plastic deformation.
This differentiation is based on their difference in extent and chemistry (CP: ≤ 15 µm, cubic face centred (cfc), 69 at.-% Al, 11 at.- % Si, 8 at.-% Mn, 12 at.-% Fe, < 1 at.-% Cu; FP: 100…700 nm, cfc, 0.7 at.-% Mg, 70 at.-% Al, 12 at.-% Si, 13 at.-% Mn, 1 at.-% Fe, < 1 at.-% Cu).
Affected by RT-ECAP, the precipitation phases (CP, FP) result in an equiaxed homogeneous grain structure combined with a more homogeneous distribution of finer precipitations.
Online since: March 2020
Authors: Normaiza Zamri, Nur Salsabila Ahmad Roslan, Seema Zareen
Essentials oils is a secondary metabolite usually responsible for the fragrance in plants is rich in compounds based on an isoprene structure [7].
Lee, Evaluation of natural and synthetic compounds from East Asiatic folk medicinal plants on the mediation of cancer, Anti-cancer Agents in Medicinal Chemistry, 6 (2006) 65–347 [3] D.
Chemistry of Natural Compounds, 54 (2018) 588-590
Online since: November 2024
Authors: Cristian-Vladimir Besalic, Lia-Nicoleta Botila, Gabriela-Victoria Mnerie, Cristan Ghera, Alexandru Nicolae Luca, Rodica Bădărău
These findings were corroborated by the microstructural analysis, which showed that the welded joints were strong and that the welding process had not significantly changed the grain structure or produced any intermetallic compounds.
Eyring, Handbook on the Physics and Chemistry of Rare Earths, Elsevier 1979
Lukey, The Chemistry of Gold Extraction.
Online since: March 2015
Authors: Yue Chun Zhao, Biao Fan, Ming Hua Li, Chang Jian Xie, Qing Qing Sun, Yong Qi Ye
Enhancement the enzymatic activity of phenol-degrading microbes immobilized on agricultural residues during the biodegradation of phenol in petrochemical wastewater Changjian Xie1, a, Biao Fan1, b, Qingqing Sun1, c, Yongqi Ye1, d, Minghua Li1, e, Yuechun Zhao1, f * 1Department of Applied Chemistry, College of Science, South China Agricultural University, Guangzhou 510642, People’s Republic of China axiechangjian@yahoo.com, bfanbiao1212@163.com, c1454908514@qq.com, d772045453@qq.com, eBKGR@163.com, f *yczhao@scau.edu.cn Keywords: Phenol, plant-residues, pre-grown, biodegradation, enzyme activity Abstract.
In addition its reticular and fibrous structure gave it a better adsorptive property than bamboo fiber, which allowed a large loading of microbial strains.
Journal of Photochemistry and Photobiology A: Chemistry (2006) 178, 1-7
Online since: November 2021
Authors: Agris Bērziņš, Aina Semjonova
Influence of Crystallization Additives on Morphology of Selected Benzoic Acids – A Molecular Dynamics (MD) Simulation Study Aina Semjonova1,a*, Agris Bērziņš1,b 1University of Latvia, Faculty of Chemistry, Jelgavas iela 1, Riga, Latvia aainasemjonova@gmail.com, bagris.berzins@lu.lv Keywords: molecular dynamics simulations; polymorphism; additives; crystal engineering; 2,6-dimethoxybenzoic acid; 3-hydroxybenzoic acid.
For this 2,6-dimethoxybenzoic acid and 3-hydroxybenzoic acid, each having two polymorphic forms, including a form without carboxylic acid homodimers in their crystal structure were selected.
However, the physical properties of a drug substance can be optimized by changing the crystalline structure.
One of such tools is MD simulations, where it is possible to model how the additive will absorb on the crystal structure and predict which additive will be the best in altering the growth rate of specific crystal faces. [12] Additionally, crystal morphology is one of the important requirements for pharmaceutical manufacturing and can affect the bioavailability.
Initial molecular geometry of 3OHBA, 2,6MeOBA and additive molecules were taken from crystal structures, while that of solvent molecules from Virtual Chemistry database.