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Journal articles on the topic 'Total Synthesis, silicon'

Author: Grafiati

Published: 6 September 2023

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1

Denmark, Scott E., and Shyh-Ming Yang. "Intramolecular Silicon-Assisted Cross-Coupling: Total Synthesis of (+)-Brasilenyne." Journal of the American Chemical Society 124, no. 51 (2002): 15196–97. http://dx.doi.org/10.1021/ja028936q.

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2

Li, Hongze, Hengmu Xie, Zhigao Zhang, et al. "Total synthesis of (−)-exiguolide via an organosilane-based strategy." Chemical Communications 51, no. 40 (2015): 8484–87. http://dx.doi.org/10.1039/c5cc02448j.

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An organosilane-based strategy has been used to accomplish the total synthesis of (–)-exiguolide. The key steps involve: (1) geminal bis(silyl) Prins cyclization to construct the A ring; (2) silicon-protected RCM reaction to construct the macrocycle; and (3) Hiyama–Denmark cross-coupling to install the side chain.

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3

Verma, Rekha, and Sunil K. Ghosh. "A silicon controlled total synthesis of the antifungal agent (+)-preussin." Chemical Communications, no. 17 (1997): 1601–2. http://dx.doi.org/10.1039/a703387g.

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4

Rodríguez-Escrich, Carles, Fèlix Urpí, and Jaume Vilarrasa. "Stereocontrolled Total Synthesis of Amphidinolide X via a Silicon-Tethered Metathesis Reaction." Organic Letters 10, no. 22 (2008): 5191–94. http://dx.doi.org/10.1021/ol8021676.

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5

Denmark, Scott E, and Jack H C. Liu. "Silicon-Based Cross-Coupling Reactions in the Total Synthesis of Natural Products." Angewandte Chemie International Edition 49, no. 17 (2010): 2978–86. http://dx.doi.org/10.1002/anie.200905657.

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6

Chowdhury, Partha Sarathi, and Pradeep Kumar. "Total Synthesis of Umuravumbolide and Hyptolide Through Silicon-Tethered Ring-Closing Metathesis." European Journal of Organic Chemistry 2013, no. 21 (2013): 4586–93. http://dx.doi.org/10.1002/ejoc.201300302.

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7

VERMA, R., and S. K. GHOSH. "ChemInform Abstract: A Silicon Controlled Total Synthesis of the Antifungal Agent (+)-Preussin." ChemInform 29, no. 1 (2010): no. http://dx.doi.org/10.1002/chin.199801235.

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8

Magnus, Philip, and Dominick Quagliato. "Silicon in synthesis. 21. Reagents for thiophenyl-functionalized cyclopentenone annulations and the total synthesis of (.+-.)-hirsutene." Journal of Organic Chemistry 50, no. 10 (1985): 1621–26. http://dx.doi.org/10.1021/jo00210a013.

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9

Denmark, Scott E., and Shyh-Ming Yang. "Total Synthesis of (+)-Brasilenyne. Application of an Intramolecular Silicon-Assisted Cross-Coupling Reaction." Journal of the American Chemical Society 126, no. 39 (2004): 12432–40. http://dx.doi.org/10.1021/ja0466863.

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10

Li, Fangzheng, and Marvin J. Miller. "Stereoselective Total Synthesis of (+)-Streptazolin by Using a Temporary Silicon-Tethered RCM Strategy." Journal of Organic Chemistry 71, no. 14 (2006): 5221–27. http://dx.doi.org/10.1021/jo060555y.

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11

Singh, Rekha, and Sunil K. Ghosh. "Synthesis of enantiomerically pure all cis-2,3,6-trisubstituted piperidine: a silicon mediated total synthesis of (+)-carpamic acid." Tetrahedron Letters 43, no. 43 (2002): 7711–15. http://dx.doi.org/10.1016/s0040-4039(02)01853-1.

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12

Denmark, Scott E., and Jack H. C. Liu. "ChemInform Abstract: Silicon-Based Cross-Coupling Reactions in the Total Synthesis of Natural Products." ChemInform 41, no. 29 (2010): no. http://dx.doi.org/10.1002/chin.201029242.

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13

de Paula, Gustavo Medeiros, L. A. Lima, and Meiry Glaúcia Freire Rodrigues. "SBA-15 Molecular Sieve Using Clay as Silicon Sources." Materials Science Forum 798-799 (June 2014): 116–20. http://dx.doi.org/10.4028/www.scientific.net/msf.798-799.116.

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New sources of silica as a replacement for TEOS in the synthesis of SBA-15 are been performed by various research teams worldwide. The aim of this work is to describe the synthesis and characterization of SBA-15 made with chocolate B clay as an alternative source of silica by the hydrothermal method. Samples of classic SBA-15 were made with the traditional TEOS method. The samples of the two silica sources were characterized by DRX, EDX, and BET to evaluate the effects of the silica source on the synthesis of the molecular sieve. The chocolate B clay was efficient in the formation of the molec

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14

Kukushkin S. A., Osipov A. V., Osipova E. V., and Stozharov V. M. "Study of silicon-to-silicon carbide transformation stages in the process of atomic substitution by the methods of total external X-ray reflection and X-ray diffractometry." Physics of the Solid State 64, no. 3 (2022): 315. http://dx.doi.org/10.21883/pss.2022.03.53187.232.

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X-ray diffraction and total external reflection of X-rays (X-ray reflectometry) methods were used to study the successive stages of synthesis of epitaxial SiC films on Si (100) X-ray diffraction and total external X-ray reflection (XRD) methods were used to study successive stages of synthesis of epitaxial SiC films on Si (100) surfaces, (110) and (111) surfaces by the atom substitution method. The data on the transformation evolution of (100) surfaces were studied, (110) and (111) Si, into SiC surfaces. A comparative analysis of the X-ray structural quality of the SiC layers grown on Si by th

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15

Kukushkin S. A., Osipov A. V., Osipova E. V., and Stozharov V. M. "Study of silicon-to-silicon carbide transformation stages in the process of atomic substitution by the methods of total external X-ray reflection and X-ray diffractometry." Physics of the Solid State 64, no. 3 (2022): 327. http://dx.doi.org/10.21883/pss.2022.03.54010.232.

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X-ray diffraction and total external reflection of X-rays (X-ray reflectometry) methods were used to study the successive stages of synthesis of epitaxial SiC films on Si (100) X-ray diffraction and total external X-ray reflection (XRD) methods were used to study successive stages of synthesis of epitaxial SiC films on Si (100) surfaces, (110) and (111) surfaces by the atom substitution method. The data on the transformation evolution of (100) surfaces were studied, (110) and (111) Si, into SiC surfaces. A comparative analysis of the X-ray structural quality of the SiC layers grown on Si by th

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16

Lee, Jihoon, and James S. Panek. "Total Synthesis of (+)-Isatisine A: Application of a Silicon-Directed Mukaiyama-Type [3 + 2]-Annulation." Journal of Organic Chemistry 80, no. 6 (2015): 2959–71. http://dx.doi.org/10.1021/acs.joc.5b00051.

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17

Hwu, Jih Ru, and John M. Wetzel. "Silicon-promoted ring contractions in the formation of carbocyclic spiro compounds. Total synthesis of (-)-solavetivone." Journal of Organic Chemistry 57, no. 3 (1992): 922–28. http://dx.doi.org/10.1021/jo00029a025.

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18

Hossain, Sakib Tanvir, Fatima Tuz Johra, and Woo-Gwang Jung. "Fabrication of Silicon Carbide from Recycled Silicon Wafer Cutting Sludge and Its Purification." Applied Sciences 8, no. 10 (2018): 1841. http://dx.doi.org/10.3390/app8101841.

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Around the world, silicon carbide (SiC) is used as a raw material in several engineering applications because of its various beneficial properties. Currently, though the Acheson method is one of the most emblematic to manufacture SiC, the direct carbonization of metallic silicon is simple and beneficial. In this reaction, silicon wafer cutting sludge can be used as an alternative silicon source material. The silicon wafer sludge contains silicon, ethylene glycol, cooling water, and a small amount of impurities. In this study, SiC was synthesized using silicon wafer sludge by a carbothermal pro

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19

Kotani, Shunsuke, Kosuke Kai, Yasushi Shimoda, et al. "Concise Asymmetric Construction ofC2-symmetric 1,9-Diarylnonanoids Using a Hypervalent Silicon Complex: Total Synthesis of (−)-Ericanone." Chemistry - An Asian Journal 11, no. 3 (2015): 376–79. http://dx.doi.org/10.1002/asia.201501080.

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20

Chiolino, N., A. M. Francis, J. Holmes, and M. Barlow. "Digital Logic Synthesis for 470 Celsius Silicon Carbide Electronics." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2018, HiTEC (2018): 000064–70. http://dx.doi.org/10.4071/2380-4491-2018-hiten-000064.

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Abstract Advancements in Silicon Carbide (SiC) digital integrated circuit (IC) design have enabled the ability to design complex, dense, digital blocks. Because of the large number of transistors, these complex digital designs make the time and risk of hand-crafted digital design, which has been the norm for SiC, too costly and risky. For large scale integrated digital circuits, computer aided design (CAD) tools are necessary, specifically the use of automatic synthesis, rule-based placement and signal routing software. The tools are used in progression as a design flow and are necessary for t

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21

Mohamed, Safaa H., Ayad S. Hameed, Emad Yousif, Mohammad Hayal Alotaibi, Dina S. Ahmed, and Gamal A. El-Hiti. "New Porous Silicon-Containing Organic Polymers: Synthesis and Carbon Dioxide Uptake." Processes 8, no. 11 (2020): 1488. http://dx.doi.org/10.3390/pr8111488.

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The design and synthesis of new multifunctional organic porous polymers has attracted significant attention over the years due to their favorable properties, which make them suitable for carbon dioxide storage. In this study, 2-, 3-, and 4-hydroxybenzaldehyde reacted with phenyltrichlorosilane in the presence of a base, affording the corresponding organosilicons 1–3, which further reacted with benzidine in the presence of glacial acetic acid, yielding the organic polymers 4–6. The synthesized polymers exhibited microporous structures with a surface area of 8.174–18.012 m2 g−1, while their pore

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22

Brosius, Arthur D., Larry E. Overman, and Lothar Schwink. "Total Synthesis of (+)-Aloperine. Use of a Nitrogen-Bound Silicon Tether in an Intramolecular Diels−Alder Reaction." Journal of the American Chemical Society 121, no. 4 (1999): 700–709. http://dx.doi.org/10.1021/ja983013+.

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23

HWU, J. R., and J. M. WETZEL. "ChemInform Abstract: Silicon-Promoted Ring Contractions in the Formation of Carbocyclic Spiro Compounds. Total Synthesis of (-)-Solavetivone." ChemInform 23, no. 26 (2010): no. http://dx.doi.org/10.1002/chin.199226254.

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24

Jänchen, Jochen, Vladimir Penchev, Elke Löffler, Barbara Parlitz, and Helmut Stach. "Influence of Silicon Content and Nature of the Template Molecule on Physico-Chemical and Catalytic Properties of SAPO-5." Collection of Czechoslovak Chemical Communications 57, no. 4 (1992): 826–35. http://dx.doi.org/10.1135/cccc19920826.

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Two series of SAPO-5 molecular sieves were synthesized: (i) Using tripropylamine as a template and varying the Si content in the gel, and (ii) varying the template molecule at constant silicon content in the gel. The products were characterized physico-chemically and tested in toluene disproportionation. It was found that the rising silica content in the synthesis gel has only little influence on the SiO2 incorporation into the SAPO. Investigation of the acid character revealed that the concentrations of the adsorbed ammonia molecules are nearly constant and independent of the total silicon co

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25

Shofiyani, Anis, Fara Chitra, Winda Rahmalia, R. Rudiyansyah, and Andi Hairil Alimuddin. "Synthesis of Nanosilica from Padas Stone to Reduce The Total Organic Carbon of Palm Oil Waste." Jurnal ILMU DASAR 20, no. 1 (2019): 39. http://dx.doi.org/10.19184/jid.v20i1.8679.

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Padas stone is one of the natural mineral containing 67.5% of SiO2 compounds. In this research, synthesis of nanosilica was carried out by sol-gel method asistanced by 2.45 GHz microwave radiations with low (10%), medium (50%) and high (100%) power at 30 and 60 minutes of contact times. It was analyzed by XRD, BET, FTIR spectrophotometry and SEM. The synthesized silica was then used as absorbent for total organic carbon (TOC) of palm oil waste. The results show that the synthesized silica was a mixture of cristobalite and quartz type minerals according to ICDD No. 00-003-0271 and 01-083-287. T

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26

Brosius, Arthur D., Larry E. Overman, and Lothar Schwink. "ChemInform Abstract: Total Synthesis of (+)-Aloperine. Use of a Nitrogen-Bound Silicon Tether in an Intramolecular Diels-Alder Reaction." ChemInform 30, no. 26 (2010): no. http://dx.doi.org/10.1002/chin.199926233.

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27

Fukaya, Yuki, Izumi Mochizuki, Masaki Maekawa, et al. "Structure determination of two-dimensional atomic sheet of silicene using TRHEPD." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1605. http://dx.doi.org/10.1107/s2053273314083946.

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This study reports determination of the atomic coordinates of a two-dimensional atomic sheet, silicene, by using total reflection high-energy positron diffraction (TRHEPD) [1]. TRHEPD method, formerly called as RHEPD, is a surface-sensitive tool owing to the total reflection of positrons. Since the sign of the potential energy for positrons in crystals is positive, opposite to that for the electrons, the positron beam at a grazing incidence are totally reflected at a crystal surface. The penetration depth of the positron beam in the total reflection region is estimated to be approximately a fe

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28

Nussupov, K. Kh, N. B. Beisenkhanov, S. A. Kukushkin, et al. "FORMATION OF CRYSTALLINE SiC IN NEAR-SURFACE SILICON LAYERS BY METHOD OF COORDINATED SUBSTITUTION OF ATOMS." Herald of the Kazakh-British technical university 20, no. 2 (2023): 27–35. http://dx.doi.org/10.55452/1998-6688-2023-20-2-27-35.

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In this work, monocrystalline films of silicon carbide were synthesized on the surface of a Si(100) silicon wafer using the method of coordinated substitution of atoms. The films were synthesized at temperatures of 1200 °C and 1300 °C for 20 minutes in a CO gas flow at a pressure of 0.8 Pa. The effect of 1200–1300 °C temperatures on the formation of single- and polycrystalline layers, as well as nanostructured SiC phases in the near-surface region of silicon by the method of atom substitution, is analyzed. The formation of a high-quality crystalline silicon carbide film and the influence of sy

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29

Sherwood, Toby, and Richard T. Baker. "Effects of Strontium Content on the Microstructure and Ionic Conductivity of Samarium-Doped Ceria." Solids 2, no. 3 (2021): 293–313. http://dx.doi.org/10.3390/solids2030019.

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Due to its high oxygen ion conductivity at elevated temperatures, samarium-doped ceria (SDC) is a very promising material for application in solid state electrochemical devices and especially in the electrolytes of solid oxide fuel cells. Several prior studies have reported a further improvement in the ionic conductivity of SDC on doping with small amounts of strontium. It is suggested that strontium acts as a sintering aid—improving the microstructure of SDC—and as a scavenger of silicon impurities, decreasing its tendency to form resistive phases at grain boundaries. However, because of the

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30

Marina Vargas Rodríguez, Y., Hiram I. Beltrán, Eloy Vázquez-Labastida, Carlos Linares-López, and Manuel Salmón. "Synthesis and characterization of montmorillonite clays with modulable porosity induced with acids and superacids." Journal of Materials Research 22, no. 3 (2007): 788–800. http://dx.doi.org/10.1557/jmr.2007.0098.

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The structural transformation of natural montmorillonite clay with different acids and superacids (hydrochloric, HCl; sulfuric, H2SO4; hydrofluoric, HF; perchloric, HClO4; chlorosulfonic, HSO3Cl; and trifluoromethanesulfonic, HSO3CF3 acids) is evaluated by various techniques, allowing its full characterization. The process involves the modulated digestion of the aluminum and silicon atoms from the original clay without the loss of the original mass in the material from a careful drying methodology. The x-ray diffraction technique suggests that the process is disruptive, causing different magni

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31

Adams, D. P., M. A. Rodriguez, C. P. Tigges, and P. G. Kotula. "Self-propagating, high-temperature combustion synthesis of rhombohedral AlPt thin films." Journal of Materials Research 21, no. 12 (2006): 3168–79. http://dx.doi.org/10.1557/jmr.2006.0387.

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Sputter-deposited, Al/Pt multilayer thin films of various designs exhibited rapid, self-propagating, high-temperature reactions. With reactant layers maintained at ∼21 °C prior to ignition and films adhered to oxide-passivated silicon substrates, the propagation speeds varied from approximately 20 to 90 m/s depending on bilayer dimension and total film thickness. Contrary to current Al–Pt equilibrium phase diagrams, all multilayers reacted in air and in vacuum transformed into rhombohedral AlPt having a space group R-3(148). Rietveld refinement of AlPt powder (generated from thin film samples)

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32

Fan, Qinbai, and Lily M. Ng. "In situ Fourier transform infrared‐attenuated total reflection spectroscopy monitoring of polyaniline synthesis mechanism on the p‐type silicon electrode." Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 14, no. 3 (1996): 1326–29. http://dx.doi.org/10.1116/1.579949.

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33

Evans, P. Andrew, Jian Cui, Santosh J. Gharpure, Alexei Polosukhin, and Hai-Ren Zhang. "Enantioselective Total Synthesis of the Potent Antitumor Agent (−)-Mucocin Using a Temporary Silicon-Tethered Ring-Closing Metathesis Cross-Coupling Reaction." Journal of the American Chemical Society 125, no. 48 (2003): 14702–3. http://dx.doi.org/10.1021/ja0384734.

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34

Gridley, Daila S., Michael J. Pecaut, and Gregory A. Nelson. "Total-body irradiation with high-LET particles: acute and chronic effects on the immune system." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 282, no. 3 (2002): R677—R688. http://dx.doi.org/10.1152/ajpregu.00435.2001.

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Although the immune system is highly susceptible to radiation-induced damage, consequences of high linear energy transfer (LET) radiation remain unclear. This study evaluated the effects of 0.1 gray (Gy), 0.5 Gy, and 2.0 Gy iron ion (56Fe26) radiation on lymphoid cells and organs of C57BL/6 mice on days 4 and 113 after whole body exposure; a group irradiated with 2.0 Gy silicon ions (28Si) was euthanized on day 113. On day 4 after 56Fe irradiation, dose-dependent decreases were noted in spleen and thymus masses and all major leukocyte populations in blood and spleen. The CD19+ B lymphocytes we

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35

Brovko, R., N. Lakina, and V. Doluda. "Synthesis and Acidity Study of Mixed MFI-MORD Type Zeolite." Bulletin of Science and Practice, no. 12 (December 15, 2022): 60–66. http://dx.doi.org/10.33619/2414-2948/85/07.

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Zeolites of various nature are widely used in the chemical industry, the fuel and energy sector of the economy as sorbents, catalysts and materials for the creation of inorganic membranes for various purposes. At the same time, it is possible to change the acid properties of the surface of zeolites both by varying the ratio of silicon to aluminum or silicon to phosphorus, and by joint synthesis of zeolites of various types with different acidic properties. The presented article provides a method for the sequential production of a zeolite of a mixed structure type MFI and mordenite. Synthesis o

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36

Filatova, D. G., A. P. Bogdanova, V. V. Krivetskiy, T. N. Penkina та M. N. Rumyantseva. "Quantification of Si dopant in β-Ga<sub>2</sub>O<sub>3</sub>-based semiconductor gas sensors by total reflection X-ray fluorescence spectroscopy (TXRF)". Industrial laboratory. Diagnostics of materials 88, № 8 (2022): 5–9. http://dx.doi.org/10.26896/1028-6861-2022-88-8-5-9.

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Developing of chemical sensors is relevant for solving environmental problems of monitoring the atmosphere of cities and industrial zones. Semiconductor sensors based on metal oxides are a promising type of chemical gas sensors due to their high sensitivity, low cost, small size, and low energy consumption. First attempts of pilot operation of atmospheric air monitoring systems based on such sensors revealed an insufficient stability of their response. Doping silicon in the basic material can solve the problem. At the same time, data on the amount and distribution of the dopant in the material

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37

Pavanello, Elizandra Pivotto, Auri Brackmann, Ivan Francisco Dressler da Costa, Vanderlei Both, and Vagner Ludwig. "Use of sodium metasilicate for management of peach brown rot." Pesquisa Agropecuária Tropical 46, no. 3 (2016): 245–53. http://dx.doi.org/10.1590/1983-40632016v4641221.

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ABSTRACT Peach brown rot, caused by the Monilinia fructicola fungus, is the main disease affecting peach crops, and it is mainly controlled via frequent fungicide applications. This study aimed at searching for alternatives to the intensive use of chemicals, evaluating silicon doses to control pre and postharvest peach brown rot and their influence on maturation parameters and fruit quality. Treatments consisted of control (water) and sodium metasilicate doses (2 g L-1, 4 g L-1, 6 g L-1, 8 g L-1 and 10 g L-1 of water). The following assessments were made: spore germination and in vitro mycelia

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38

Grabowski, Jacob P., Gregory M. Ferrence, and T. Andrew Mitchell. "Efforts toward the total synthesis of (±)-toxicodenane A utilizing an oxidopyrylium-based [5+2] cycloaddition of a silicon-tethered BOC-pyranone." Tetrahedron Letters 61, no. 38 (2020): 152324. http://dx.doi.org/10.1016/j.tetlet.2020.152324.

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39

Almeataq, Mohammed S., and Eid M. Alosime. "Synthesis Based on a Preceramic Polymer and Alumina Nanoparticles via UV Lithography for High Temperature Applications." Materials 13, no. 5 (2020): 1140. http://dx.doi.org/10.3390/ma13051140.

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Because of the increased demand for preceramic polymers in high-tech applications, there has been growing interest in the synthesis of preceramic polymers, including polysiloxanes and alumina. These polymers are preferred because of their low thermal expansion, conformability to surfaces over large areas, and flexibility. The primary objective was to evaluate the aspects of polymer-derived ceramic routs, focusing on the UV lithography process of preceramic polymers and the pyrolyzing properties of the final ceramics. We found that the p(DMS-co-AMS) copolymer was effective in scattering the hyd

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40

de Oliveira, Amanda Sayure Kasuya, Adriana Perpetua Figueiredo Paulista, Ana Ellen Valentim de Alencar, and Tiago Pinheiro Braga. "Gelatin Template Synthesis of Aluminum Oxide and/or Silicon Oxide Containing Micro/Mesopores Using the Proteic Sol-Gel Method." Journal of Nanomaterials 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/2504796.

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Aluminum oxide and/or silicon oxide-based supports were synthesized by proteic sol-gel method. The characterization was performed through the analysis of TG, XRD, FTIR, SEM, and N2 physisorption. The XRD diffractograms showed an amorphous material profile. TG results indicate the total liberation of the organic and inorganic material in the calcination temperature used, occurring in different mass loss range. This piece of information was reaffirmed by the FTIR spectra, which presented characteristic bands of gelatin structure before calcinations which disappear in the spectrum of the solid af

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41

Քոթանյան, Ա․Հ, Ա. Մ. Մկրտչյան та Մ․Հ․ Քոթանյան. "ՍԻԼԻՑԻՈՒՄԻ ՀՆԱՐԱՎՈՐ ԲԱՐԵՆՊԱՍՏ ԱԶԴԵՑՈՒԹՅՈՒՆՆ ԱՌՈՂՋՈՒԹՅԱՆ ՎՐԱ". MEDICINE, SCIENCE AND EDUCATION, № 35 (травень 2023): 55–62. http://dx.doi.org/10.56936/18291775-2023.35-55.

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Silicon is one of the most common elements in the earth’s crust. It is always present in water and food in varying amounts. Higher amounts of Si are found in plant-based foods. About 20% of the total amount of silicon ingested with food and water comes with drinking water and drinks (including beer, which contains in average 20–25 mg/l of silicon)․ For higher animals and humans, silicon is generally not considered to be an essential nutrient. However, the importance of this element for human health is now supported by increasing research evidence. The biological role of silicon in human organi

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42

Tan, Yan Ni, Yong Liu, Zhang Qing, Gurpreet Birdi, and Liam M. Grover. "Synthesis of Pure Dicalcium Silicate Powder by the Pechini Method and Characterization of Hydrated Cement." Materials Science Forum 787 (April 2014): 387–94. http://dx.doi.org/10.4028/www.scientific.net/msf.787.387.

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Calcium silicate (CS) is a main component of Portland cement and is responsible for the strength development. Recent research has shown that dicalcium silicate cement (CSC) is bioactive and is a potential candidate for bone replacement. Traditionally, dicalcium silicate powder is synthesized by a solid state reaction or a sol-gel method. The solid-state reaction, however, usually needs a higher temperature and a longer calcination time. Furthermore, the dicalcium silicate powder made by the sol-gel method is not pure, and contains a significant quantity of CaO which is harmful to the strength

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43

Dezhatkina, S. V., Sh R. Zyalalov, and M. E. Dezhatkin. "PHYSIOLOGICAL AND BIOCHEMICAL STATUS OF COWS IN CASE OF INTRODUCTION OF A SILICON-CONTAINING SUPPLEMENT INTO THEIR RATION." Vestnik of Ulyanovsk state agricultural academy 212 (March 22, 2021): 170–74. http://dx.doi.org/10.18286/1816-4501-2021-1-170-174.

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The article raises questions about development of organic food market in Russia. One of the options for obtaining organic livestock products by using silicon-containing natural minerals as feed additives is proposed. The main carrier in the supplement is a highly activated natural zeolite, the filler is an amino acid complex of animal origin, the supplement is a 100 % natural product. The work was carried out in Ulyanovsk region at OOO “Agrofirma Tetyushskoye” on dairy cows of the black-and-white breed. There were two groups, 10 cows in each were selected: according to live weight, age, produc

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Müllner, Sebastian, Tobias Michlik, Michael Reichel, Tilo Held, Ralf Moos, and Christina Roth. "Effect of Water-Soluble CMC/SBR Binder Ratios on Si-rGO Composites Using µm- and nm-Sized Silicon as Anode Materials for Lithium-Ion Batteries." Batteries 9, no. 5 (2023): 248. http://dx.doi.org/10.3390/batteries9050248.

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Silicon-containing materials are still the most promising alternatives to graphite as the negative electrodes of lithium-ion batteries. However, the different Li+ storage mechanism combined with the high capacity result in new requirements for the passive electrode components, such as the binder. To ensure sufficient cycling stability, silicon must be embedded in a suitable carbonaceous matrix. For this purpose, we used a simple ball milling process with reduced graphene oxide (rGO) to produce Si-rGO composites with µm- and nm-sized silicon particles. The rGO was synthesized previously from a

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Maksimov, S. K., and V. N. Kukin. "Electron Microscopy investigations of buried Si3N4 isolation layers." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 4 (1990): 642–43. http://dx.doi.org/10.1017/s0424820100176344.

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Formation of buried Si3N4 layers obtained by using repeated cycles of implantation and annealing has been investigated. Structure investigations were made with the use of a CM30 Twin electron microscope (whose diaphragm is 0.18 nm-1 ). In HREM studies, axial micrographs in Si reflections of the 000, 111 and 220 types were employed. Two types of samples were used: "plane view" samples and those of a "cross section". Si3N4 precipitates were identified by application of the EELS method on the LN and Lsiedges.N+ - ions were implanted into silicon wafers (of p-type, (001), 10 Ω cm) at a room temper

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Ortiz-Gómez, Inmaculada, Víctor Toral-López, Francisco J. Romero, et al. "In situ synthesis of fluorescent silicon nanodots for determination of total carbohydrates in a paper microfluidic device combined with laser prepared graphene heater." Sensors and Actuators B: Chemical 332 (April 2021): 129506. http://dx.doi.org/10.1016/j.snb.2021.129506.

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Akopdzhanyan, T. G., E. A. Chemagina та I. P. Borovinskaya. "Study into the feasibility of obtaining dense materials based on AlN-SiC solid solution in one stage by SHS gasostatiс processing". Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya, № 3 (16 листопада 2020): 34–40. http://dx.doi.org/10.17073/1997-308x-2020-3-34-40.

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The synthesis and sintering of the (AlN)x(SiC)1–x solid solution were studied under the conditions of SHS gasostatiс processing at high nitrogen gas pressures (up to 110 MPa). Phase formation during the combustion of aluminum and silicon carbide mixtures with the different amount of a combustible component (aluminum content is 35 to 60 wt.%) was studied. It was shown that the optimal amount of aluminum mixed with silicon carbide to obtain a single-phase solid solution (with the complete Al conversion to AlN and without SiC dissociation) is 45–50 wt.%. A mixture with 55–60 wt.% Al leads to exce

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Кукушкин, С. А., та А. В. Осипов. "Механизм образования углеродно-вакансионных структур в карбиде кремния при его росте методом замещения атомов". Физика твердого тела 60, № 9 (2018): 1841. http://dx.doi.org/10.21883/ftt.2018.09.46408.083.

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AbstractThe mechanism of formation of carbon-vacancy structures in silicon carbide SiC from silicon vacancies that inevitably form during synthesizing SiC from Si by atomic substitution has been studied. It is shown that it is useful for one of four nearest carbon C atoms to be displaced to the place of a silicon vacancy with the decrease in the total energy by 1.5 eV in the case of polytype 3C and by 0.9–1.4 eV in the case of polytype 4H. In this case, the C atom must overcome the activation barrier of 3.1 eV in the case of polytype 3C and by 2.9–3.2 eV in the case of polytype 4H. This transi

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Pashova, Katya, Elyes Dhaouadi, Ivaylo Hinkov, et al. "Graphene Synthesis by Inductively Heated Copper Foils: Reactor Design and Operation." Coatings 10, no. 4 (2020): 305. http://dx.doi.org/10.3390/coatings10040305.

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We report on the design of a reactor to grow graphene via inductively heating of copper foils by radio frequency (RF) magnetic fields. A nearly uniform magnetic field induced by Helmholtz-like coils penetrates the copper foil generating eddy currents. While the frequency of the current is being rapidly varied, the substrate temperature increases from room temperature to ~1050 °C in 60 s. This temperature is maintained under Ar/H2 flow to reduce the copper, and under Ar/H2/CH4 to nucleate and grow the graphene over the entire copper foil. After the power cut-off, the temperature decreases rapid

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Venâncio, Jefferson Bittencourt, Nildo da Silva Dias, José Francismar de Medeiros, et al. "Effect of Salinity and Silicon Doses on Onion Post-Harvest Quality and Shelf Life." Plants 11, no. 20 (2022): 2788. http://dx.doi.org/10.3390/plants11202788.

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Salt stress during pre-harvest limits the shelf life and post-harvest quality of produce; however, silicon nutrition can mitigate salt stress in plants. Thus, we evaluated the effects of salinity and fertilization with Si, in pre-harvest, on the morpho-physiological characteristics of onion bulbs during shelf life. The experiment was set up in randomized complete blocks, with treatments arranged in split-split plots. The plots had four levels of electrical conductivity of irrigation water (0.65, 1.7, 2.8, and 4.1 dS m−1). The subplots had five fertilization levels with Si (0, 41.6, 83.2, 124.8

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